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Tutorial6: File Transfer / Sending Email Messages

76 bytes added, 09:26, 9 February 2021

→‎INVESTIGATION 1: FILE TRANSFER (SECURE COPY)

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<ol><li value="3">'''NOTE:''' Make certain to open a '''command-line terminal''' and NOT a graphical SSH application for this tutorial. </li><li>After logging into your Matrix account, issue to the '''pwd''' command to confirm you are in your home directory. </li><li>Issue the following Linux command to create the following directory: mkdir ~/remote </li><li>Change to the ~/remote directory and confirm that you have changed to that directory. </li><li>Use a text editor to create a text file called myfile.txt </li><li>Enter the following two lines displayed below in your editing session: This is my file It is a small file </li><li>Save editing changes to your ''myfile.txt'' file and exit your text editor. </li><li>Let's run a shell script to check that you created the remote directory and that you created the myfile.txt file (with correct file contents) in that directory. </li></li>Enter the following command: bash /home/murray.saul/scripts/week6-check-1 </li><li>If you encounter errors, make corrections and then re-run the checking script until you receive a congratulations message, and proceed to the next step. NOTE: We will now learn to transfer files between your local home computer and your remote Matrix Linux server. </li></ol>[[Image:cmd.png|thumb|right|350px|You are required to '''remain''' in your '''local''' computer's command terminal for the remainder of this ''INVESTIGATION'' and ''INVESTIGATION 2'']]

<ol><li value="12">'''Exit your Matrix ssh session''' but '''remain''' in the ''command terminal'' on your '''local''' computer.. '''ATTENTION:''' You are required to '''remain''' in your '''local''' computer's command terminal for the remainder of this ''INVESTIGATION'' and ''INVESTIGATION 2''. </li><li>The mkdir command works with MS Windows/UNIX/Linux/MacOSx computers. Issue the following command on your local computer to create a directory called local: mkdir local </li><li>The cd command works with MS Windows/UNIX/Linux/MacOSx computers. Issue the following command on your local computer to change to the local directory: cd local </li><li>If you are using MS Windows on your local computer, issue the dir command to confirm you are in the ''local'' directory; otherwise, use the pwd command. </li> <li>If you are in MS Windows, open the NotePad application to create a text file (Otherwise, use the nano or vi text editor). </li><li>Enter a few lines of text, and if using '''Notepad''', then click on the File menu and select save as (save as the filename other.txt in your local directory) and then exit the Notepad text editor. '''NOTE:''' if using another text editor, save your editing session and exit the text editor. </li><li>If your OS is MS Windows issue the dir Windows command to view the contents of your current directory (otherwise, issue the ls command for other operating systems). We will use the '''scp''' command to copy the local file called '''other.txt''' to your home directory on your remote Matrix Linux server. </li><li>Issue the following Linux command to copy the other.txt file from your local machine to your remote Matrix server (replace yoursenecaid is YOUR Seneca ID and '''ADD A COLON : TO THE END OF THE COMMAND'''): scp other.txt yoursenecaid@matrix.senecacollege.ca: </li><li>When prompted, enter your Matrix '''password'''. [[Image:scp-diagram-2.png|thumb|right|350px|You can issue the ssh command, followed by a '''command''' that will be run on your '''remote''' computer, but display command output on your '''local''' computer.]] TIP: You can issue the ssh command, followed by a command that will be run on your remote computer, but display on your local computer without having to establish a continuous connection to your remote Matrix server. </li><li>Issue the following command (using your matrix username): ssh yoursenecaid@matrix.senecacollege.ca ls -l other.txt </li><li>When prompted, '''enter your password''' and press '''ENTER'''. Do you see detailed information other.txt file? (look at bottom) That command was run remotely on your Matrix server as confirmation that you securely copied that file to the home directory of the Matrix server. Let's copy the file called '''myfile.txt''' in the '''~/remote''' directory that you created earlier in your Matrix account to your local directory on your home computer. </li><li>Issue the following Linux command (replace yoursenecaid is YOUR Seneca ID). The period "." as '''second argument''' represents your current directory on your local computer): scp yoursenecaid@matrix.senecacollege.ca:remote/myfile.txt . </li><li>Issue the dir or ls command (depending on the OS of your local computer) to confirmed your properly copied that file from Matrix. </li><li>Use the '''Notepad''' application (or vi for other OS types) to create a text file called mytextfile.txt, type some text and then save in the local directory of your computer. <li>Issue the dir or ls command (depending on your OS) to confirm that your newly-created file exists in your local directory. </li><li>We are going to intentionally make a '''mistake''' with the scp command. Issue the following Linux command to copy the mytextfile.txt file from your local machine to your remote Matrix server (replace yoursenecaid is YOUR Seneca ID and DO NOT INCLUDE THE : at the end of the command so see what happens): scp mytextfile.txt yoursenecaid@matrix.senecacollege.ca Did you notice anything different (i.e. no password)? </li><li>Issue the following command (using your matrix username): ssh yoursenecaid@matrix.senecacollege.ca ls -l mytextfile.txt </li><li>When prompted, enter your password and press ENTER. The file mytextfile.txt does NOT appear in your home directory on your Matrix server! Note that the COLON was NOT added to the end of the command! Therefore, you MUST remember to include the COLON : at the end of the hostname, or it will NOT remotely copy the file! </li><li>Issue the following command to copy that same file to the '''~/remote''' directory in Matrix: scp other.txt yoursenecaid@matrix.senecacollege.ca:remote </li><li>Issue the following command to confirm that it was remotely copied to your '''~/remote''' directory in Matrix: ssh yoursenecaid@matrix.senecacollege.ca ls -l /home/yoursenecaid/remote Do you see the output for the detailed file listing of output.txt? What does this indicate? <li>Issue the following command to copy the '''other.txt''' file to the '''~/remote''' directory in Matrix renaming it as '''different.txt''': scp other.txt yoursenecaid@matrix.senecacollege.ca:remote/different.txt </li><li>Issue the following command to confirm that the file was remotely copied to your '''~/remote''' directory in Matrix with a different filename: ssh yoursenecaid@matrix.senecacollege.ca ls -l /home/yoursenecaid/remote/different.txt Were you able to properly copy this file? Let's issue a checking script remotely to see that you properly copied that file from your local computer to your remote Linux server to both your home directory and ~/remote directory. </li><li>Issue the following: ssh yoursenecaid@matrix.senecacollege.ca bash /home/murray.saul/scripts/week6-check-2 If you encounter errors, re-run the scp commands to correct and re-run the above command until you receive a congratulations message. </li><li>Remain in the terminal on your local computer and proceed to ''INVESTIGATION 2''. </ol>

:In the next investigation, you will use the '''sftp''' Linux command to transfer (i.e. copy) files between servers.

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