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→INVESTIGATION 1: USING SECURE COPY
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<ol><li value="3">When you have issue the above ssh command, enter your password to login.<br><br></li><li>Issue the following Linux commands to create the following directory:<br><span style="color:blue;font-weight:bold;font-family:courier;">mkdir ~/remote</span><br><br></li><li>Change to the <b>~/remote</b> directory and confirm that you have changed to that directory.<br><br></li><li>Use a text editor to create a text file called <b>myfile.txt</b><br><br></li><li>Enter the following two lines displayed below in your editing session:<br><span style="font-family:courier;font-weight:bold;">This is my file<br>It is a small file</span><br><br></li><li><b>Save</b> editing changes to your ''myfile.txt'' file and exit your text editor.<br><br></li><li>Change back to your <b>home</b> directory and confirm that you are located in your <i>home</i> directory.<br><br></li><li>Let's run a <b>shell script</b> to check that you created the correct directories<br>and that you created the <b>myfile.txt</b> file (with correct file contents) in the <b>~/from</b> directory<br>before using the ''scp'' Linux command.<br><br></li></li>Issue the following: <span style="color:blue;font-weight:bold;font-family:courier;">bash /home/murray.saul/scripts/week6-check-1</span><br><br></li><li>If you encounter errors, make corrections and then re-run the checking script until you receive<br>a congratulations message, and proceed to the next step.<br><br><b>NOTE:</b> We will now learn to transfer files between your <b>(local) home computer</b> and your <b>(remote) Matrix Linux server</b>.<br><br></li><li>Exit your Matrix ssh session, but remain in the OS terminal on your <u>home</u> computer.<br><br></li><li>The <b>mkdir</b> command works with <i>MS Windows/UNIX/Linux/MacOSx computers</i>.<br>Issue the following command to create a directory called <b>local</b> in your current directory: <span style="color:blue;font-family:courier;font-weight:bold;">mkdir local</span><br><br></li><li>The <b>cd</b> command works with <i>MS Windows/UNIX/Linux/MacOSx computers</i>.<br>Issue the following command to change to the local directory: <span style="color:blue;font-family:courier;font-weight:bold;">cd local</span><br><br></li><li>If you are in MS Windows, open the <span style="color:blue;font-family:courier;font-weight:bold;">NotePad</span> application to create a text file.<br><br><b>NOTE:</b> if you are using a Graphical Linux or MacOSx OS, then use a text editor like <b>vi</b><br>.</li><li>Enter a few lines of text, and then click on the <b>File</b> menu and select <b>save as</b><br>(save as the filename <b>other.txt</b> in your <b>local</b> directory) and then <b>exit</b> the <i>Notepad</i> text editor.<br><br></li><li>If your OS is MS Windows issue the <span style="color:blue;font-family:courier;font-weight:bold;">dir</span> to confirm the contents of your current directory<br>(otherwise, issue the <b>ls</b> command for other operating systems).<br><br>The <b>SSH package</b> on your <i>home computer</i> and on the <i>Matrix Linux server</i> contain a <b>suite</b> (i.e. <b>collection</b>) of secure utilities <br>including <b>ssh</b>, <b>scp</b> and <b>sftp</b>.<br><br></li><li>Issue the following Linux command to copy the <b>other.txt</b> file from your local machine to your remote Matrix server<br>(replace yoursenecaid is <u>YOUR</u> Seneca ID and ADD A COLON : TO THE END OF THE COMMAND):<br><span style="color:blue;font-weight:bold;font-family:courier;">scp other.txt yoursenecaid@matrix.senecacollege.ca:</span><br><br></li><li>When prompted, enter your Matrix '''password'''.<br><br><b>TIP:</b> You can issue the ssh command, followed by a command that will be run on your remote computer,<br>but displayed on your local computer <b><u>without</u></b> having to establish a continuous connection to your remote Matrix server.<br><br></li><li>Issue the following command (using your matrix username): <span style="color:blue;font-weight:bold;font-family:courier;">ssh yoursenecaid@matrix.senecacollege.ca ls -l</span><br><br></li><li>When prompted, enter your password and press ENTER.<br><br>Do you see detailed information regarding the file called <b>output.txt</b>?<br>That command was run remotely on your Matrix server as confirmation that you securely copied that file<br>to the home directory of the Matrix server.<br><br></li><li>Issue the following command to copy that same file to the ~/remote directory in Matrix:<br><span style="color:blue;font-weight:bold;font-family:courier;">scp other.txt yoursenecaid@matrix.senecacollege.ca:remote</span><br><br></li><li>Issue the following command to confirm that it was remotely copied to your ~/remote directory in Matrix:<br><span style="color:blue;font-weight:bold;font-family:courier;">ssh yoursenecaid@matrix.senecacollege.ca ls -l /home/yoursenecaid/remote</span><br><br>Do you see the output for the detailed file listing of <b>output.txt</b>?<br>What does this indicate?<br><br><li>Issue the following command to copy that same file to the ~/remote directory in Matrix as a different filename:<br><span style="color:blue;font-weight:bold;font-family:courier;">scp other.txt yoursenecaid@matrix.senecacollege.ca:remote/different.txt</span><br><br></li><li>Issue the following command to confirm that the file was remotely copied to your ~/remote directory in Matrix with a different filename:<br><span style="color:blue;font-weight:bold;font-family:courier;">ssh yoursenecaid@matrix.senecacollege.ca ls -l /home/yoursenecaid/remote/different.txt</span><br><br>What does this indicate?<br><br>Let's issue a checking script remotely to see that you properly copied that file from your<br>local computer to your remote Linux server to both your <b>home</b> directory and <b>~/remote</b> directory.<br><br></li><li>Issue the following:<br><span style="color:blue;font-weight:bold;font-family:courier;">bash /home/murray.saul/scripts/week6-check-2</span><br><br>If you encounter errors, re-run the scp commands to correct and re-run the above command until you receive a congratulations message.<br><br></li></ol>
:'''NOTE:''' It would be possible to use the '''scp''' command to copy files from the Matrix server to your Windows computer, but this would require obtaining your computer's IP address and your Windows username, so we will not demonstrate this in our tutorial.
:In the next investigation, you will use the '''sftp''' Linux command to transfer (i.e. copy) files between servers.<br><br>