<br>===Main Objectives of this Practice Tutorial===  :* Learn how to access your '''Matrix''' server account (from home and/or from a '''remote''' Seneca computerlab). :* Learn several ways to '''exit''' your Matrix Linux Account session. :* Understand the '''Linux command structure''' and how to get '''help''' with Linux command usage. :* Become efficient with '''Linux command line editing''' by using '''short-cut keys'''. :* Perform Issue a '''checking program''' (i.e. ''Shell Script'') to '''the first section and half of the second section of online assignment #1confirm'''that you accessed your Matrix account. :* Perform '''LINUX PRACTICE QUESTIONS''' for additional practice<br><br>.

|colspan="2" |'''Slides:'''<ul><li>Week 1 Lecture 1 Notes:<br>[https://ictwiki.cdot.senecacollege.ca/~murray.saululi101/uli101slides/ULI101-Week11.1.pdf PDF] | [https://ictwiki.cdot.senecacollege.ca/~murray.saululi101/uli101slides/ULI101-Week11.1.pptx PPTX]</li></ulli>TutorialsWeek 1 Lecture 2 Notes:<ul><libr>[https://wiki.cdot.senecacollege.ca/uli101/slides/ULI101-1.2.pdf PDF] | [HOWTOhttps: Access Your Matrix Account]//wiki.cdot.senecacollege.ca/uli101/slides/ULI101-1.2.pptx PPTX]<br></li></ul>'''Tutorials:'''<ul><li>[httphttps://czegelwiki.cdot.senecacollege.comca/senecawiki/uli101/lectures/Lecture1.html Les Czegel's Week 1 Notes (HTML)Tutorial_1:_Using_Your_Matrix_Server_Account#INVESTIGATION_1:_ACCESSING_YOUR_MATRIX_LINUX_ACCOUNT HOWTO: Access Your Matrix Account]</li></ul>'''Windows SSH client Software:'''<ul><li>[http://www.sfsu.edu/ftp/win/ssh/SSHSecureShellClient-3.2.9.exe SSH/SFTP]</li><li>[httphttps://thewww.chiark.earthgreenend.liorg.uk/%7Esgtatham~sgtatham/putty/latest/x86/putty.exe html Putty]</li><li>[https://www.bitvise.com/ssh-client-download Bitvise SSH Client]</li><li>[https://mobaxterm.mobatek.net/download-home-edition.html MovaXterm]</li></ul>

| style="padding-left:15px;" |'''Matrix Account Access:'''

'''Command Line Editing:'''

| style="padding-left:15px;"|'''General Linux Commands:'''

|colspan="1" style="padding-left:15px;" width="30%"|'''Brauer Instructional Videos:'''<ul><li>[https://www.youtube.com/watch?v=L5RcOngDV_o Connecting to Matrix Using SSH Client, Starting the Assignments, and Running UBUNTU Within Windows 10]<br><br></li><li>[https://www.youtube.com/watch?v=3wZmZOKLllk&list=PLU1b1f-2Oe90TuYfifnWulINjMv_Wr16N&index=2 Linux File System, Basic Navigation (ls, cd, pwd, tree), Absolute and Relative Paths]</li></ul>

===Purpose of Having a Your Student Account on Matrix Linux Server Account===

| style="padding-left:0px;width:10%" |'''mylearn.senecacollege.ca'''

| style="padding-left:15px;width:65%" |''Student Lecture Notes'' / ''Tutorials'' (weekly, review) / ''Practice Questions'' / ''Additional Learning Resources''

| style="padding-left:15px;width:65%" |Matrix is our Linux Account server environment used for "''hands-on Practicepractice''" and Assignment submission. Each ULI101 student has an account on this server.

[[Image:cli-prompt.png|thumb|right|120px|A '''shell''' is an interface / interpreter to allow a user to communicate with the Linux computer system. ]]Although you need to study concepts (slides) throughout this course, you will also need to get '''hands-on practice running Linux commands as well as performing online tutorials and performing and submitting online course assignments'''.<br>This requires that you '''connect to a Linux server''' (Matrix) and become comfortable with '''issuing Linux commands'''.

:* Performing '''Linux Practice Tutorials'''('''11 Weekly Tutorials x 2% = 22% of your final grade''')

:* Performing '''Online Linux AssignmentsReview Tutorial''' ('''38 Sections x 1% = 8% of your final grade''') ===Connecting to the Seneca Student VPN===[[Image:gp1.png|thumb|right|130px|'''Seneca Student VPN''' ]] All Seneca College students are required to connect to the '''Seneca Student VPN''' in order to be able to connect to their '''Matrix''' Linux account when outside of campus as a '''network security''' measure. The Seneca Student VPN uses multi-factor authentication (MFA)when logging in to verify you are who you say you are.

===Connecting ''<b>Multi-factor authentication</b> is an electronic authentication method in which a computer user is granted access to a website or application only after successfully presenting two or more pieces of evidence (or factors) to an authentication mechanism: knowledge (something the Seneca Global Portal===[[Image:gp1user and only the user knows).png|thumb|right|130px|'''Seneca Global Portal''' ]]Reference: https://en.wikipedia.org/wiki/Multi-factor_authentication

Seneca College is "rolling-out" additional measures to improve '''network security'''. One of these measures<br>is to implement '''multi-factored authentication'''. As of '''September 2020''', all Seneca College students are required<br>to connect to the '''Seneca Global Portal''' in order to be able to connect to their '''Matrix''' Linux account.<br><br>''<b>Multi-factor authentication</b> is an electronic authentication method in which a computer user is granted access to a website or application only after successfully presenting two or more pieces of evidence (or factors) to an authentication mechanism: knowledge (something the user and only the user knows).'' Reference: https://en.wikipedia.org/wiki/Multi-factor_authentication<br><br>You should have received an email e-mail message (also available in course announcements) regarding with instructions on how to setup set up your Smart Phone to connect and valid via the Seneca Global Portalsmartphone for multi-factor authentication. '''NOTE:''' If you haven't done this installed it yet, please perform do so by following the steps provided in the following linkITS instructions here:<br>https://employeesstudents.senecacollege.ca/spaces/77186/it-services/wiki/view/37221025/student-vpn<br><br>

In the next investigation, you will learn how to '''connect''' to and '''login''' to your Matrix server account from a remote computer<br>such as your '''home desktop computer''', '''laptop''' or '''tablet''' computer.<br><br>

[[Image:clicls-promptshell.png|thumb|right|80px100px|]]After connecting Connect to the Seneca Global Portal, you can open a Matrix via'''command terminal'''<br>in your '''Newer Windows 10''', '''Mac''ssh' or '''Linux''' computer and issue the following command:<br><br><span style="color:blue;font-weight:bold;">ssh senecauserid@matrix.senecacollege.ca</span><br><br>[[Image:ssh-application-icon.png|right|80px|]]You can also click on the following link There are two basic methods to connecting to '''download''' and '''install''' a graphical SSH application for your Windows machine:<br>http://www.sfsu.edu/ftp/win/ssh/SSHSecureShellClient-3.2.9Matrix account.exe<br><br>

=INVESTIGATION '''Method 1: ACCESSING YOUR MATRIX LINUX ACCOUNT=Run ssh Command from command prompt:'''

In this investigation:After connecting to the '''Seneca Student VPN''', you will learn how to connect and login to your Matrix account by issuing can open a '''command from your computerterminal''' in '''s text-based terminal<br>and/Windows 10 (or by downloadingabove)''', installing a running a graphical Windows SSH graphical application.'''Mac''' or '''Linux''' computer and issue the following command:: <!-span style="color:blue;font-weight:bold;">ssh senecauserid@matrix.senecacollege.ca</span>

[[Image:apps-anywhere-main-window.png|thumb|right|250px|'''MyApps'NOTE:'' ('''AppsAnywhere''') Main Window ]]If You instructor may show you were able how to access one of Seneca computer labs, you could access an application run a graphic Linux VM in order to connect to your Matrix account via (if interested, refer to the optional tutorial at the '''MyApps''' applicationend of this semester).

Since many students are =INVESTIGATION 1: ACCESSING YOUR MATRIX LINUX ACCOUNT={{Admon/important|ATTENTION: This weekly tutorial must be completed by ''Friday at 11:59pm in Week 2'not''' permitted to access Senecaobtain a grade of 's computer labs at this time due to '2%''COVID19''', you can install and run the '''AppsAnywhere''' application (which works in an identical way to MyApps) on a remote Windows computertowards this course. This application |It is an application streaming service essential that lets you install software complete these Weekly Tutorials fully and on any Seneca PC on demandtime. Any software application on the AppsAnywhere menu can be used on computers These are your major learning tool in classrooms, labs, and the Computing Commonscourse. There are no late marks.}}

ReferenceIn this section, you will learn how to access your Matrix Linux account by two different methods: https://inside.senecacollege.ca/its/software/myapps/

:* From your '''NOTE:home computer''' Although you can install and run the AppsAnywhere application on an Apple Mac computer, you will NOT have access to many of the Windows applications (including applications to connect to your Matrix account). In this case, you can open <br>:* From a '''terminalworkstation in a Seneca College''' and issue the lab via '''sshMyApps''' command to connect to your Matrix account.  -->

===METHOD 1: CONNECTING TO YOUR MATRIX ACCOUNT FROM A COMMAND LINE TERMINALYOUR HOME COMPUTER===

[[Image:gp1.png|thumb|right|130px|The '''Global PortalSeneca Student VPN''' service must be connected.]]

'''Perform the Following Steps:'''# Before proceedingIf you want to connect to your Matrix account from home, make you MUST first connect to the Seneca Student VPN.<br>Make certain that your '''Seneca Global Portal Student VPN is connected'''.<br><br>'''NOTE:''' If you haven't set this up, refer to the following link for instructions;<br>https://employeesstudents.senecacollege.ca/spaces/77186/it-services/wiki/view/37221025/student-vpn<br><br>'''NOTE:''' You only have to connect to your Seneca Global Portal student VPN once during the day, <br>or while you are logged into your computer.<br><br># Determine which '''operating system ''' that your computer is using.<br><br># Try connecting to your Matrix account using the instructions in the '''table ''' below based on <u>your</u> '''current operating system'''.<br><br>

<th>'''Newer Version of Windows 10(or above):'''</th> <th>'''MacOSXmacOS:''' </th>

<ol><li value="4">When connecting securely for the '''first time''', a '''dialog box ''' will appear to share a "'''public key'''" with your Matrix account in order to make your interaction between your workstation and the remote Linux server secure within the network (i.e. encrypted to prevent unauthorized access by other users)<br><br>''<b>FYI:</b> To make communications over a network '''secure''', a computer generates '''two keys''': a '''private key''' that is kept on the computer, and a '''public key''', which can be shared with other computers. Transmissions from your computer uses the private key to encrypt ('''scramble''') transmission to the remote computer, which in turn, uses the public key to decrypt (unscramble) the transmission. Likewise, the remote computer uses the public key to encrypt (scramble) transmissions and your computer uses the private key to decrypt ('''unscramble''') those transmissions.''<br><br></li><li>Type '''yes''' and press '''ENTER''' to share your public key.<br><br>Next, a '''dialog box ''' will appear prompting you for your Matrix account '''password''' in order to gain entry to your Matrix account. <br>Your Matrix password is <u>identical </u> to your Seneca password. <br><br>'''NOTE:''' As you type the password, the text will may be blocked-out or '''hidden ''' to prevent others from viewing the screen to obtain your password<br><br></li><li>Enter your Seneca password and press '''ENTER'''<br><br></li>'''NOTE:''' If you encounter an '''error message''', this can occur for several reasons:<ol><li>You mis-spelled the '''name of the server'''</li><li>You mis-spelled your Matrix '''username''' (same username that you connect to ''my.senecacollege.ca'')</li><li>You have '''CAPS LOCK''' on by mistake (your username should be '''lowercase''' only).</li><li>You mis-spelled your '''password''' (same password that you connect to ''my.senecacollege.ca'')<br><br>If you continue to experience the same problems, click on the following link for IT service desk contact info: <br>[https://employeesstudents.senecacollege.ca/spaces/122190/support/wiki/view/35241473/contact-its '''IT service desk'''].<br><br></li></ol><li>If you entered your password correctly, the '''Matrix Linux shell''' should appear where you can enter Linux commands.<br><br>The '''Matrix''' server has been configured to allow users to '''only interact with the Linux OS by issuing commands'''.<br>The main reason for this is to '''force students to learn how to issue Linux commands'''.<br><br></li><li>To '''exit ''' your Matrix session, type the command <span style="color:blue;font-weight:bold">exit</span> followed by '''ENTER'''<br><br>'''NOTE:''' You should notice that you are returned to the original command prompt where you issued the ''ssh'' command.<br><br></li><li>Type the same command and at the '''command terminal prompt''': <span style="color:blue;font-weight:bold">exit</span> followed by '''ENTER'''<br><br>'''NOTE:''' You should notice that the you are disconnected and that the original terminal window has '''automatically closed'''.<br><br></li><li>Try accessing your Matrix account, and then exiting your Matrix account several times to become familiar with this process.<br><br>You will now learn an '''alternative method ''' to access your Matrix account (if you have an MS Windows machine)<br>by downloading and running a graphical SSH application.</li></ol><br> ===METHOD 2: CONNECTING TO YOUR MATRIX ACCOUNT FROM SENECA COMPUTER LAB=== <span style="color:red;font-weight:bold;">NOTE: This section requires you have access to a Seneca computer lab on campus.<br>If you don't have access to a Seneca computer lab this semester, then you can skip this section</span><br><br>

You can also install and run a free [[Image:apps-anywhere-main-window.png|thumb|right|250px|'''MyApps''' ('''MS Windows graphical SSH applicationAppsAnywhere''' in order to connect to your Matrix account.<br>You may find it ) Main Window ]]This method would also be useful when running a graphical SSH application to if you do '''copy and paste textnot'''. There are several applications<br>that you can download have a home (notebook) computer and install, but we will be using the SSH Secure Shell Client application for this tutorialhave access to a Seneca computer lab workstation.<br><br>

'''Perform the Following Steps:MyApps''' ('''AppsAnywhere''') is an application streaming service that lets you install software on any Seneca PC on demand. Any software application on the MyApps menu can be used on computers in classrooms, labs, and the Computing Commons. <!--Reference: https://inside.senecacollege.ca/its/software/myapps/

<table align="right"><tr valign="top"><td>[[Image:ma_1.png|thumb|right|150px|Click on Login button.]]</td><td>[[Image:ma_2.png|thumb|right|150px|Enter your Seneca email address.]]</td><td>[[Image:ma_3.png|thumb|right|150px|Authenticate via your Seneca username and password.]]</td></table># Open a web-browser on your Windows PC.<br><br># Click on the following link: https://myapps.senecacollege.ca/<br><br># Click the '''Login''' button to proceed.<br><br># When prompted, enter your your Seneca College email address.<br><br># You will be taken to the authentication dialog box: enter your Seneca College username and password.<br><br><table align="right"><tr valign="top"><td>[[Image:ma_4.png|thumb|right|150px|Click on on the blue area.]]</td><td>[[Image:ma_5.png|thumb|right|150px|Click on '''Next''' to install the streaming application.]]</td><td>[[Image:apps-anywhere-main-window.png|thumb|right|250px|now use '''MyApps''' ('''AppsAnywhere''') Main Application Window ]]</td></table># A dialog box appears to offer a choice of actions. You need to install an application to support the Apps Anywhere streaming service.<br>Click on the <span style="color:blue;font-weight:bold">blue</span> area to install the application.<br><br># Click '''Next''' to proceed with installing the streaming application.<br><br>'''NOTE''': You may be require to '''authenticate''' using your computer account's password. Also, you may be required to '''restart''' Windows workstation in your computer after the application has been installed.<br><br>If you restarted your computer, then launch a '''web-browser''' and click on the following '''link''' to resume: https://myapps.senecacollege.ca/<br>You may be required Seneca lab room to login and validate like you did in previous steps.<br><br># You should notice that the '''AppsAnywhere''' main application window appears.<br><br>'''NOTE:''' You may see a '''Validation in Process''' (or a '''validation successful''') message appear .<br>Although your applications are displayed, you <u>cannot</u> launch them until the validation process is successful.<br><br><table align="right"><tr valign="top"><td>[[Image:ma_validation.png|thumb|right|175px|Validation in Process Message in AppsAnywhere. ]]</td><td>[[Image:ma_system_tray.png|thumb|right|175px|Starting '''Cloudpaging''' Service in your '''System Tray'''. ]]</td><tr></table>You can tell if the system is still validating if an red exclamation mark <span style="color:red; font-weight:bold">!</span> appears in the application icon.<br><br>If the validation process is taking a long time, try opening the '''Cloudpaging''' service in the '''system tray''' located in the right side of the taskbar (to allow you may need to click to display ALL services connect and then '''double-click''' the '''Cloudpaging''' application login to launch)your Matrix server account.<br><br># After your AppsAnywhere session has been validated, click on the '''Search Apps''' area located in the top right corner of the AppsAnywhere window and type the word: <span style="color:blue;font-weight:bold">ssh</span><br><br>[[Image:apps-anywhere.png|thumb|right|250px|Several SSH applications will appear. We will use the application called '''SSH Client''' for this practice tutorial. ]]# Several SSH applications will appear. <br><br>'''NOTE:''' All of these applications allow you to connect to your Matrix account.<br>We will use the application called '''SSH Secure Shell Client''' for this practice tutorial.<br><br>'''NOTE:''' If you encounter an error trying to launch the SSH application via AppsAnywhere,<br>click on the following link for IT service desk contact info: [https://employees.senecacollege.ca/spaces/122/support/wiki/view/3524/contact-its '''IT service desk'''].<br><br># Launch the '''SSH Secure Shell Client''' application icon to launch this program.<br><br>'''TIP:''' Prior to launching the application, you can add this to your '''favourites''' which will make it faster<br>to access this application in the future.<br><br><span style="color:blue">'''NOTE #1''': If you experience a problem launching any of your applications, you should note that there is a '''Cloudpaging Player''' application<br>that lists applications launched. If your application did '''NOT''' launch properly, '''right click''' on each listed application and select '''remove''' from the menu.<br>Then re-launch your application from the AppsAnywhere page (the IT service desk indicated that this can occasionally occur).<br><br>

# '''Click''' the following '''link''' to download and install the free SSH Secure Shell application on your Windows computer:<br>http://www.sfsu.edu/ftp/win/ssh/SSHSecureShellClient-3.2.9.exe<br><br>'''NOTE:''' If you can't download or run this link, check to see if you computer allows downloads from this site.<br><br><table align="right"><tr valign="top"><td>[[Image:ssh-application-icon.png|thumb|right|75px|Double-click SSH icon on desktop to launch application]]</td><td>[[Image:ssh-main-window.png|thumb|right|150px|SSH Client Application Window ]]</td></table># After the application has been installed, an application icon should appear on your desktop.<br>'''Double click''' the '''SSH Secure Shell Client''' application icon to run this application.<br><br>The main SSH Client window will appear. Let's learn how to connect to and login to our Matrix account<br>using this graphical SSH application.<br><br># Click the '''Quick Connect''' button.<br><br>'''NOTE:''' The Connect dialog box allows the user to specify the '''server name''' and your '''account name'''<br>to allow you to connect to the server.<br><br>[[Image:quick-connect-window.png|thumb|right|150px|Quick Connect Dialog Box ]]# Click on the textbox labelled '''Hostname''' and type the text: <span style="color:blue;font-weight:bold">matrix.senecacollege.ca</span><br><br>'''NOTE:''' You can use the hostname '''matrix''' since you are located <u>'''inside'''</u> Seneca's network.<br>If you where located <u>outside</u> Seneca's network, then you would need to enter the full domain name: '''matrix.senecacollege.ca'''<br>You will be using the latter hostname since you will be connecting to your Matrix account remotely and not within the college.<br><br>[[Image:share-public-key.png|thumb|right|150px|Dialog Box to Share Public Key on Remote Server ]]# Click on the textbox labelled '''User Name''' and type your Seneca username (i.e. same as your Seneca userid.<br><br> # Click the '''Connect''' button.<br><br># When connecting securely for the '''first time''', a dialog box will appear to share a "public key" with your Matrix account in order to make your interaction between your workstation and the remote Linux server secure within the network<br>(i.e. encrypted to prevent unauthorized access by other users).<br><br># Click the '''Yes''' button to share your public key.<br><br>'''NOTE:''' In subsequent logins to your Matrix account, you may experience a welcome dialog box - simply click '''OK''' to proceed.<br><br># Next, a dialog box will appear prompting you for your '''Matrix account password''' in order to gain entry to your Matrix account. Your Matrix password is identical to your Seneca password. As you type the password, the text will be blocked-out or hidden to prevent others from viewing the screen to obtain your password<br><br><table align="right"><tr valign="top"><td>[[Image:ssh-password-prompt.png|thumb|right|150px|Password Dialog Box ]]</td><td>[[Image:ssh-authentication-response.png|thumb|right|150px|Authentication Response Dialog Box ]]</td></table># '''Enter your password''' and click '''OK'''.<br><br>[[Image:ssh-login-error.png|thumb|right|150px|SSH Login Error ]]# Click '''OK''' at Perform the '''Authentication Response''' dialog box.<br><br>'''NOTEFollowing Steps:''' If you encounter an '''error message''', this can occur for several reasons:<ol><li>You mis-spelled the '''name of the server'''</li><li>You mis-spelled your Matrix '''username''' (same username that you connect to my.senecacollege.ca)</li><li>You have '''CAPS LOCK''' on by mistake (your username should be '''lowercase''' only).</li><li>You mis-spelled your '''password''' (same password that you connect to my.senecacollege.ca)</li></ol><br>If you continue to experience the same problems,<br>click on the following link for IT service desk contact info: [https://employees.senecacollege.ca/spaces/122/support/wiki/view/3524/contact-its '''IT service desk'''].<br><br>[[Image:ssh-shell-window.png|thumb|right|150px|Matrix Shell Command Line Interface ]]#If you followed the login steps correctly, the '''SSH Linux shell should appear''' where you enter Linux commands.<br><br>The '''Matrix''' server has been configured to allow users to '''only interact with the Linux OS by issuing commands'''. There are various reasons for this, but the main 2 reasons are to '''force students to learn how to issue Linux commands''' as well as '''limitations to remote access to a graphical Linux server''' due to large number of users (students).<br><br>

# Start your workstation in your lab and login to your Seneca Windows account.<br><br># Make certain that the '''MyApps'''Configuring window is open. This window should have opened shortly after you logged into your Graphical Windows workstation. If the application windows is not open, click on the '''MyApps''' icon on the desktop to launch).<br><br>[[Image:ssh-main-window.png|thumb|right|150px|SSH Client ApplicationWindow ]]<span style="color:red;font-weight:bold;">NOTE: You may be required to validate in order to use MyApps correctly. If you see near the top of the screen "requires validation", then click on that area to connect to validate.</span><br><br># Click on the '''Search Apps''' area located in the top right corner of the MyApps window and type the word: <span style="color:blue;font-weight:bold">ssh</span><br><br># Several SSH applications will appear. <br><br>'''NOTE:''' All of these applications allow you to connect to your Matrix account.<br>We will use the application called '''SSH Secure Shell Client''' for this practice tutorial.<br><br># Launch the '''SSH Secure Shell Client''' application icon to launch this program.<br><br>[[Image:quick-connect-window.png|thumb|right|150px|Quick Connect Dialog Box ]]'''NOTE:''' Prior to launching the application, you can add this to your '''favourites''' which will make it faster<br>to access this application in the future.<br><br> # The main SSH Client window will appear. Click on the '''Quick Connect''' button.<br><br>'''NOTE:''' The Connect dialog box allows the user to specify the '''server name''' and your '''account name'''<br>to allow you to connect to the server.<br><br># Click on the textbox labelled Hostnanme and enter the text: <span style="color:blue;font-weight:bold">matrix</span><br><br>'''NOTE:''' You can use the hostname '''matrix''' since you are located <u>inside</u> Seneca's network.<br>If you where located <u>outside</u> Seneca's network, then you would need to enter the full domain name: '''matrix.senecac.on.ca'''<br><br>[[Image:share-public-key.png|thumb|right|150px|Dialog Box to Share Public Key on Remote Server ]]# When connecting securely for the '''first time''', a dialog box will appear to share a "public key" with your Matrix account in order to make your interaction between your workstation and the remote Linux server secure within the network (i.e. encrypted to prevent unauthorized access by other users)<br><br>'''FYI:''' To make communications over a network secure, a computer generates '''two keys''': a '''private key''' that is kept on the computer, and a '''public key''', which can be shared with other computers. Transmissions from your computer uses the private key to encrypt (scramble) transmission to the remote computer, which in turn, uses the public key to decrypt (unscramble) the transmission. Likewise, the remote computer uses the public key to encrypt (scramble) transmissions and your computer uses the private key to decrypt (unscramble) those transmissions.<br><br>[[Image:ssh-password-prompt.png|thumb|right|150px|Password Dialog Box ]]# Click the '''Yes''' button to share your public key.<br><br># Next, a dialog box will appear prompting you for your Matrix account password in order to gain entry to your Matrix account. Your Matrix password is identical to your Seneca password. As you type the password, the text will be blocked-out or hidden to prevent others from viewing the screen to obtain your password[[Image:ssh-authentication-response.png|thumb|right|150px|Authentication Response Dialog Box ]]<br><br># Enter your password and click '''OK''' or press '''ENTER'''<br><br>[[Image:ssh-login-error.png|thumb|right|150px|SSH Login Error ]]# Click '''OK''' or press '''ENTER''' at the '''Authentication Response''' dialog box.<br><br>'''NOTE:''' If you encounter an '''error message''', this can occur for several reasons:<ol><li>You mis-spelled the '''name of the server'''</li><li>You mis-spelled your Matrix '''username''' (same username that you connect to my.senecacollege.ca)</li><li>You have '''CAPS LOCK''' on by mistake (your username should be '''lowercase''' only).</li><li>You mis-spelled your '''password''' (same password that you connect to my.senecacollege.ca)</li></ol><br>If you continue to experience the same problems, click on the following link for IT service desk contact info: <br>[https://students.senecacollege.ca/spaces/190/support/wiki/view/1473/contact-its '''IT service desk'''].<br><br>[[Image:ssh-shell-window.png|thumb|right|150px|Matrix Shell Command Line Interface ]]#If you entered your password correctly, the main SSH Linux shell should appear where you enter Linux commands.<br><br>The '''Matrix''' server has been configured to allow users to '''only interact with the Linux OS by issuing commands'''. There are various reasons for this, but the main 2 reasons are to '''force students to learn how to issue Linux commands''' as well as '''limitations to remote access to a graphical Linux server''' due to large number of users (students).<br><br>[[Image:ssh-settings-window.png|thumb|right|150px|SSH Settings Dialog Box ]]

You can '''configure''' your Windows graphical the SSH application to adjust elements such as<br>the '''window size''' and '''text font type''' and text '''text font size'''. [[Image:ssh-settings-window.png|thumb|right|150px|SSH Settings Dialog Box ]]<br><br>We will now show be showing you how to configure just your '''SSH Secure Shell Client''' application,<br>(FYI: but the other SSH applications available in the '''Week 1 reference section''' also have the ability can allow you to configure their settings).<br><br>

# You now should notice that you have customized your SSH shell terminal. You can use the settings screen<br>to also change your background and text '''colours''' if you are interested in doing so.<br><br># Try moving your mouse pointer to the bottom right-hand corner of the SSH application window,<br>then '''click and drag''' outwards to make the application window larger.<br><br># To exit your Matrix session, type the following command and press ENTER: <span style="color:blue;font-weight:bold">exit</span> followed by '''ENTER'''<br><br>'''NOTE:''' You should notice that the colour of the text changes slightly when disconnected<br>and you are unable to issue Linux commands from that window.<br><br># After you have disconnected from your account, '''close''' the SSH Secure Shell Client application window.<br><br>'''NOTE:''' You are '''STRONGLY ADVISED''' # It is recommended to use the '''exit''' command repeat these steps with connecting to properly terminate your Matrix session<br>'''<u>PRIOR</u>''' to closing the SSH or terminal application window!<br><br>In the next investigation, account from a Seneca lab workstation until you will learn how to '''issue Linux commands''' and how to<br><u>setup</u> and <u>perform</u> become comfortable with the '''first two sections of the online ULI101 assignment #1'''process.<br><br>

<br>=INVESTIGATION 2: USING THE LINUX SHELL =In this sectioninvestigation, you will learn how to use the Linux Shell. Topics in the section include:

:* Learn how to setup Issue a '''online assignment 1program'''.:* Perform the '''first section''' and '''3 parts of the second section''' of online assignment #1'''.<br><br>to confirm that you connected to your Matrix account

===Part 1: Using the Linux Shell =Command Structure==

The Bash shell in Matrix allows you to interact with your Matrix account Linux by issuing typing commands.

'''The General basic Linux Command Structure command structure is as follows:'''<br><span style="font-family:courier;color:blue;font-weight:bold">command argument1 argument2 ... </span>

Some Linux commands can be issued by entering the Linux command line without arguments (e.g. '''pwd''', '''date''', '''ls''', '''cal'''),<brspan style="font-family:courier;color:blue;font-weight:bold">but many Linux commands can be issued with arguments (ecommand argument1 argument2 .g. '''cal 2002''', '''cd /bin''', '''ls -l -a /bin''' ).<br><br/span>'''What Does an Argument Represent?'''

An Some Linux commands can be used as-is (e.g. '''argumentpwd''' can respresent::* a , '''date''', '''pathnamels''':* a command , '''optioncal''':* a series of characters ), but many Linux commands can also be issued with arguments (ie.eg. '''textcal 2002''', '''cd /bin''', '''ls -l -a /bin''') that the command can use .

'''What is an argument?''' An argument is used to change the default behaviour of a command. Arguments come in three major forms: # A command '''option'''.#* Example: <code>-l</code># A '''file pathname'''.#* Example: <code>/etc</code># A series of characters (i.e. '''text''') that the command can use.#* Example: <code>"Hello, world."</code> An '''argument''' is <u>must be separated</u> from a command (or and from other arguments) by whitespace (a '''SPACE''', '''MULTIPLE SPACES''' or a '''TAB''').<br><br>

# Make certain Confirm that you are logged into your Matrix account.<br><br># Issue the following Linux command: <span style="font-family:courier;color:blue;font-weight:bold">pwd</span><br><br>#* '''Explanation:''' The output from this Linux command basically shows your '''current location''' in on the Matrix server(otherwise known as your '''p'''resent '''w'''orking '''d'''irectory).<br>This represents a '''directory pathname''' to your home directory. We will discuss ''pathnames'' later in this course.<br><br># Issue the following Linux command: <span style="font-family:courier;color:blue;font-weight:bold">ls</span><br><br>#* '''Question:''' What do you notice?<br><br>#* '''Answer:''' If there were are any files in your home directory, just only their file names would be are displayed.<br><br># Issue Change your directory location by issuing the following Linux command: <span style="font-family:courier;color:blue;font-weight:bold">cd /binetc</span><br><br># Issue the following Linux command to confirm your changed current location: <span style="font-family:courier;color:blue;font-weight:bold">pwd</span>#* '''Result:''' Your Linux session should display <brcode>/etc/<br/code>when running this command. If your output is different, retrace your steps to make sure you haven't skipped anything or had a typo in a command.# Issue the following Linux commandagain: <span style="font-family:courier;color:blue;font-weight:bold">ls</span><br><br>#* '''Question:''' What do you notice?<br><br>How is this different from the last time you ran it?# Issue Re-run the following Linux ls command using an '''option''': <span style="font-family:courier;color:blue;font-weight:bold">ls -l</span><br><br>#* '''Question:''' What do you notice?<br><br>#* '''Answer:''' The '''-l''' option combined with the '''ls''' command provides displays a '''detailed''' ("''long''") listing of the same files , providing you with more information on a separate line for about each file.<br><br>This is called metadata (data about data), and includes information such as last modified date, file size, ownership and permissions.# Issue the following Linux command to return Return to your home directory: <span style="font-family:courier;color:blue;font-weight:bold">cd</span><br><br># Issue the following Linux command Now confirm you've changed back to confirm your current locationhome directory: <span style="font-family:courier;color:blue;font-weight:bold">pwd</span>#* '''Result:''' The shell should display <brcode>/home/''yourusername''<br/code># Issue the following Linux command: <span style="font-family:courier;color:blue;font-weight:bold">ls /bin</span># Issue the following Linux command to confirm your current location: <brspan style="font-family:courier;color:blue;font-weight:bold">pwd<br/span>#* '''Question:''' What do you notice? #* '''Question:''' What makes this command with that argument useful if you are current currently located in your home directory?<br><br># Issue a Linux command that you have already learned to confirm that you have returned to your home directory.<br><br># Issue the following Linux command: <span style="font-family:courier;color:blue;font-weight:bold">clear</span><br><br>#* '''Question:''' What do you notice? How would Why is this command be helpful?<br>#* '''FYITip:''' The short-cut shortcut keys to clear the screen for the Bash shell isare: <span style="font-family:courier;color:font-weight:bold">ctrl-l</span><br><br># Issue the following Linux command: <span style="font-family:courier;color:blue;font-weight:bold">who</span><br><br>#* '''Question:''' What information does this command show?<br><br>#* '''Answer:''' This command lists users that are logged into the same Matrix Linux server as yourself.<br>#* '''NOTE:''' Remember that the Matrix Linux cluster contains several servers, so it does not (or nodes). It won't display<br>all users that are logged onto those other machines within that into the cluster!<br><br>, only the ones on the same node as you. # Issue the following Linux command: <span style="color:blue;font-weight:bold">whoami</span><br><br>#* '''Question:''' What does this command display? #* '''Question:''' What do you think is the purpose of this command?<br><br># Issue the following Linux command: <span style="font-family:courier;color:blue;font-weight:bold">cal</span><br><br>#* '''Question:''' What is the purpose of does this commanddo?<br><br># Issue the following Linux command: <span style="font-family:courier;color:blue;font-weight:bold">cal 20212035</span><br><br>What #* '''Question:''' How and why is the purpose of this command using this argumentoutput different?<br><br># Issue the following Linux command: <span style="font-family:courier;color:blue;font-weight:bold">cal 2 20212035</span><br><br>#* '''Question:''' What is the purpose do each of this command using those two these numbers do?#* '''numbersQuestion:''' as What do you think would happen if you reversed the order of those arguments?<br><br>(i.e. cal 2035 2) '''==Getting Help with Linux Commands'''==

With the Linux OS containing over '''2500''' commands and utilities, it is good 's important for a Linux user or users and Linux system administrators (sysadmin ) to learn about how to use commands “on-the-fly”.<br><br>The '''man''' command can provide information on how to use a command<br>(i.e. '''command usage''', '''acceptable command arguments''', '''command options''', '''examples''').<br><br># Issue the following command: <span style="font-family:courier;color:blue;font-weight:bold">man man</span><br><br>You may notice that the online manual categories commands into sections or '''numbered volumes'''.<br><br># Type the '''SPACE''' key to move to the next screen.<br><br>How many '''volume numbers''' are contained in the man pages (like '''executable commands''',<br>'''games''', or '''system administrator commands''')?<br><br>'''TIP:''' You can use the following '''short-cut keys''' within the man command to <br>help navigate throughout this utility to get help with the ls command (refer to table below):<br><br><table cellpadding="3"><tr><th style="border-bottom: 1px solid black;">Keyboard Shortcut</th><th style="border-bottom: 1px solid black;">Purpose</th></tr><tr><td>'''ENTER'''</td><td>Move down one line</td></tr><tr><td>'''SPACEBAR'''</td><td>Move one screen down</td></tr><tr><td>'''&lt;ctrl&gt;&lt;b&gt;'''</td><td>Move one screen up</td></tr><tr><td>'''/pattern/'''</td><td>Search for Pattern</td></tr><tr><td>'''q'''</td><td>quit man utility</td></tr></table><br># Press the letter <span style="font-family:courier;color:blue;font-weight:bold">q</span> to exit the man command.<br><br># Issue the following Linux command to get help with the ls command: <span style="font-family:courier;color:blue;font-weight:bold">man ls</span><br><br># Navigate through the man utility for the '''ls''' Linux command and note the '''option letters''' that correspond to the following descriptions:<br><ul><li>"'''use a long lising format'''"</li><li>"'''do not ignore entries starting with .'''" (i.e. hidden files)</li><li>"'''sort by file size'''"</li><li>"'''append indicator (one of */=>&|) to entries'''" (i.e. type of file)</li></ul><br># Exit the man utility for the ''ls'' command.<br><br># Issue the '''ls''' command for <u>each</u> of those option letters you noted in '''step 4''' to see how this command differs for each option.<br><br>'''NOTE:''' The '''man''' utility can be used with the '''-k''' option to help list Linux commands that match a text pattern<br>that is contained within the help screen for a Linux command.<br><br># '''Pipeline commands''' can be used to filter-out unnecessary output. In the next command that you will be issuing,<br>the output from the '''man -k''' command, is sent into the '''grep''' command to ''filter'' (i.e. ''trap'') only output that matches the pattern "8"<br>(The number "8" refers to the category of type of command - in this case, administration commands).<br><br>We will learn more about pipeline commands later in this course.<br><br># Issue the following Linux pipeline command: <span style="font-family:courier;color:blue;font-weight:bold">man -k user | grep 8</span><br><br>How does this ''pipeline command'' make it easier to obtain information regarding man command?<br><br># If you wish to change your password, you can change it by issuing the command: <span style="font-family:courier;color:blue;font-weight:bold">passwd</span><br>What option for the passwd command can be used to change user info (such as name)?<br>'''Hint:''' use the '''man''' command for '''passwd'''.<br><br># Press the letter <span style="font-family:courier;color:blue;font-weight:bold">q</span> to exit the man command.<br><br>'''NOTE:''' Do '''NOT''' run the ''passwd'' command. Unique for this college, your Matrix password is changed automatically when you change your '''myseneca''' password.<br><br>You will now learn how to perform '''command line editing''' to correct syntax errors while typing Linux commands PRIOR to pressing the ENTER key.<br><br>

The '''Command Line Editingman'''[[Image:utility is an interactive collection of manual pages that provides information on how to use a given command-line-editing(i.png|thumb|right|520px|Command Line Editing Shortcut Keyse. '''command usage''', '''acceptable command arguments''', '''command options''', '''examples'''). ]]

Learning '''shortcut keys''' in any OS terminal You will allow you now learn how to be more productive as a perform ''Linux user'command line editing' or ''to correct syntax errors while typing Linux System Administrator'' (commonly referred commands PRIOR to as: '''Linux sysadmin''').<br><br><br>Let's learn a few common Bash Shell keyboard shortcut keys and find out where you can access online help for additional shortcuts (if required)pressing the ENTER key.

[[Image:meta-key.png|thumb|right|350px370px|To make '''alt-f''' key work, select '''Edit''' -> '''Settings''' -> '''Keyboard''', and select the checkbox '''Use ALT as Meta key (and Escape)'''.]]

# Press the <span style="font-family:courier;color:blue;font-weight:bold">ctrl-a</span> key combination. What happens?<br><br>'''NOTE:''' To make '''alt-f''' key work when using use the '''GRAPHICAL Windows SSH Client application''', select '''Edit''' -> '''Settings''' -> '''Keyboard''', and select the checkbox '''Use ALT as Meta key (and Escape)'''.<br><br>

# Press the <span style="font-family:courier;color:blue;font-weight:bold">alt-b</span> key combination '''one time'''.<br>(OPTION+left-arrow for Mac OSx).<br><br>'''WARNING:''' If you are using the graphical ssh application, then using the left arrow key to move the cursor to the beginning of the text: '''/bin'''<br><br><table align="right"><tr valign="top"><td>[[Image:ctrl-b.png|thumb|right|150px|'''alt-b''' moves one word backwards for Windows OS]]</td><td>[[Image:ctrl-w.png|thumb|right|150px|'''ctrl-w''' deletes a word to <u>left</u> of the cursor.]]</td><td>[[Image:new-ls.png|thumb|right|150px|After command is deleted, then type new command and press '''ctrl-e''' to move to end of the command line.]]</td></tr></table>

# Press the <span style="font-family:courier;color:blue;font-weight:bold">ctrl-l</span> key combination. What happens? What is the advantage of using '''ctrl-u''' as opposed to '''ctrl-l'''?<br><br>:The Bash shortcut keys that you just learned are sufficient to perform Bash Shell editing.<br>Although you are NOT required to learn other short-cut keys, here is a link to a listing in case you are interested:<br>[https://ostechnix.com/list-useful-bash-keyboard-shortcuts/Useful Bash Shell Keyboard Shortcuts] ==Tutorial Submission== '''Running a Shell Script to Check Student Online Tutorial Participation'''<table align="right"><tr valign="top"><td>[[Image:script-check-1.png|thumb|right|250px|If all all check pass, then user performed can proceed.]]</td><td>[[Image:script-check-2.png|thumb|right|450px|If there is a warning, then feedback is provided to user to correct and re-run checking script.]]</td></table> Professors will require students successfully perform these online tutorials for marks (within a deadline). In order to confirm that you successfully performed a tutorial, you will be required to run a program (or in later tutorials, several programs) to prove that you successfully completed tasks in a tutorial and get marks. These programs (known as Shell Scripts) will check your work and offer feedback if you made mistakes, so you can make corrections. Making corrections (i.e. troubleshooting) and re-running these checking programs until you are successful will help students gain "hands-on" experience as well as "trouble-shooting experience. If you have correctly completed the required tasks, the user can proceed. If the checking shell script detects an '''error''', then it will provide feedback to allow the student to fix that problem so they can re-run the checking shell scripts until they have successfully completed a task. '''Perform the Following Steps:''' # Make certain that your current directory is '''your home directory''' by entering the following Linux command:#* <span style="color:blue;font-weight:bold;font-family:courier;">cd</span># Issue the following command to run a checking script:#* <brspan style="font-family:courier;color:blue;font-weight:bold">~uli101/week1-check</span>#* '''Note:''' The beginning character "'''~'''" is called '''tilde'''. You get this character by pressing '''SHIFT''' + '''`''' (which is the key to the left of the number 1 on your keyboard). # Your screen should clear and indicate that you have proved that you have successfully logged in.# An email will be sent to your Seneca email as '''confirmation''' in case your ULI101 professor is assigning marks to these tutorials.#* Keep those confirmation email messages for the duration of this semester as proof that you have completed those checking scripts in case there is a discrepancy in tutorial grades.<!-- NOTE: ONLINE ASSIGNMENTS ARE RETIRED AND REPLACED WITH ONLINE TUTORIALS and REVIEW QUESTIONS

You are required to perform '''3 online assignments''' throughout this course. This online assignment is used to teach and reinforce<br>Linux commands to gain experience for '''quizzes''', '''test 1''' (midterm ) and '''test 2''' (final exams).

In this sectioninvestigation, you will learn to:

# A screen similar to the one displayed on the right will appear.<br><br><span style="color:red;">'''WARNING''': You need to select the <u>'''CORRECT'''</u> section for the course which you belong to.<br>If you do <u>NOT</u> select your correct section, your assignment may not be recorded for marks!</span><br><br># Determine your '''ULI101 three-letter course section code''' from your timetable.<br><br>

# The assignment main menu will then be displayed.<br><br>'''NOTES:'''<ul><li>Near the bottom of the window, you will see '''"You are currently registered to"''' followed by the '''section letter''' and '''instructor name'''. Double-check your course timetable to confirm that this the correct section letter. If you have selected the WRONG section, type <span style="color:blue;font-weight:bold">C</span> in the menu selection area and press <span style="color:blue;font-weight:bold">ENTER</span>. You will return back to the original window to select your correct course section.<br><br></li><li>Near the top of the window displays the sections to complete in the assignment. You are NOT required to complete all sections at the same time. You can check the assignment #1 link on the ULI101 main WIKI page to note the due date for assignment #1. Sections that are NOT completed will be displayed in '''reverse text with a blue background'''. On the other hand, when you compete a section, then the section will appear as regular text<br>(i.e not in reverse text).<br><br>[[Image:assn-completed-window.png|thumb|right|250px|Main Assignment Window to Confirm Which Sections Have or Have Not Been Completed. ]]</li><li>If you want to verify that you have completed sections for the assignment, look for the text '''"Marks earned so far for ULI101 Assignment:"''' and it will show how many sections have been completed. When it shows all sections completed, then your assignment is finished and you should receive full marks provided that you have selected your correct course section.<br><br></li></ul># At the '''Selections Available''' menu assignment #1 window, enter <span style="color:blue;font-weight:bold">1</span> in the menu selection area to begin the first section called '''"Introduction to Unix Commands"'''.<br><br>

# Run Re-run the command to restart your assignment that you did in step #1 and go to the '''main menu'''.<br>What do you notice?<br><br>If you successfully completed the first two sections, they no longer appear in reverse video.<br>This indicates that you have completed the first two sections of this assignment(i.e. you do NOT have to save your work!).<br><br>

Here is a link to the MS a Word Document document of ALL of the questions displayed below but with extra room to answer on the document tosimulate a quiz:

: https://ictwiki.cdot.senecacollege.ca/~murray.saululi101/uli101files/uli101_week1_practice.docx