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Tutorial6: File Transfer / Sending Email Messages

4 bytes added, 06:48, 24 January 2021

→‎INVESTIGATION 1: USING SECURE COPY

<ol><li value="3">When you have issue the above ssh command, enter your password to login. </li><li>Issue the following Linux commands 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>Change back to your home directory and confirm that you are located in your home directory. </li><li>Let's run a shell script to check that you created the correct directories and that you created the myfile.txt file (with correct file contents) in the ~/from directory before using the ''scp'' Linux command. </li></li>Issue the following: 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><li>Exit your Matrix ssh session, but remain in the OS terminal on your home computer. </li><li>The mkdir command works with MS Windows/UNIX/Linux/MacOSx computers. Issue the following command to create a directory called local in your current directory: mkdir local </li><li>The cd command works with MS Windows/UNIX/Linux/MacOSx computers. Issue the following command to change to the local directory: cd local </li><li>If you are in MS Windows, open the NotePad application to create a text file. NOTE: if you are using a Graphical Linux or MacOSx OS, then use a text editor like vi .</li><li>Enter a few lines of text, and 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. </li><li>If your OS is MS Windows issue the dir to confirm the contents of your current directory (otherwise, issue the ls command for other operating systems). The SSH package on your home computer and on the Matrix Linux server contain a suite (i.e. collection) of secure utilities including ssh, scp and sftp. </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'''. TIP: You can issue the ssh command, followed by a command that will be run on your remote computer, but displayed 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 </li><li>When prompted, enter your password and press ENTER. Do you see detailed information regarding the file called output.txt? 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. </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 that same file to the ~/remote directory in Matrix as a different filename: 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 What does this indicate? 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: 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></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.

Msaul

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Tutorial6: File Transfer / Sending Email Messages

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