The Linux Operating System Assignment 4 Solution

Introduction




During this hands-on project, you will login to a Linux workstation, experiment with a few more commands, and get more comfortable using the Bash shell interactively. The purpose of this lab is experimental: try the commands, try to figure out what they do, and try looking them up in the textbook, the videos provided on Blackboard, or online. This assignment will be much easier if you read Chapter 3 from the textbook first!




Interactive Use of the Bash Shell




Log in to your Linux account and open a terminal window.



Use the script utility to capture the screen output and save into a file named assignment-4.txt.



Change your working directory to CS-250.



Change your working directory to Examples.



Open file test1 for editing using the vi editor. Run the vi command in the background.



Open file test2 for editing using the vi editor. Run the vi command in the background.



Open file test3 for editing using the vi editor. Run the vi command in the foreground.



Add a line to file test3 that reads “================” and suspend command vi test3.



List all your jobs.



Bring command vi test2 to the foreground and add some text of your choice to the end of the file.



Suspend command vi test2.



Bring command vi test3 to the foreground and save the file.



Bring command vi test2 to the foreground and save the file.



Stop all jobs.



Verify the changes made to files test2 and test3.



Use the shell filename expansion mechanism to list all the files that begin with test.



Use the shell history expansion mechanism to recall the command you issues in Step 9.



Issue a command to locate the command srot. Note the shell’s reaction since there is no such command (srot). We will correct the spelling in the next step.



Use the shell history expansion mechanism to recall the last command replacing the string ro with the string or.



Use the shell history expansion mechanism to view the manual pages for command sort. Hint: use the last argument (sort) of the most recent command (which sort).



Issue a Linux command to include the special directory symbol (.) on the command search path ($PATH).



Create an alias named back that, when issued, takes a user from any directory in the filesystem back to the user’s own home directory.












Create an alias named rm that, when issued (rm file), prompts the user for whether to remove the file. If the response is not affirmative, the file is skipped.



Issue a command to append the file test2 to the end of the file test1.



Issue a command to send a line-numbered listing of file test2 to the printer.



Write a Bash function rm to move its argument files to the ~/Trash folder.



Test your function rm using all the files that begin with test.



Find the Linux version running on your computer.



Stop the script utility.



Clean up your script output file. This means remove all commands that result in error messages, all extra commands that are not part of this lab, all typing mistakes, and all control characters (except ^M). This step could be viewed as torture, but it is supposed to give you practice and motivation to learn vi well. You must turn in a clean script output file. Points will be deducted if you turn in the “raw” script output file.



Submission Instructions




Submit your assignment-4.txt file on Blackboard.


































































































































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