Question

2. Create a directory using “mkdir” and change into that directory using “cd”. Next, create another directory within the new directory and then change into that directory. Now, run cdwithout any arguments, then run pwd. What do you conclude about the cd command when run with no arguments?

3. You won't find the set command in either /bin or /usr/bin, or in any directory listed in the PATH setting. How is it executed then? (That is, if there is no set executable, why doesn't this command cause a “command not found” error?)

1. Why shouldn't you have a filename beginning with a “–” (dash)?
2. When should you use a section number as an argument to man?
3. What does “deprecated” mean in the IT industry?
4. Can a user have the same login name more than once in the who output? What would cause that?
5. Which command does the ordinary user use to change the system date and time?
6. If you find that your keystrokes are not being echoed, or appear in a strange font, or as graphics, what remedies should you try?
7. What key do you press to erase the last character typed? The last word? The entire line?

Answer 1

This explanation is for question number 2:

1. Now first check the present working directory by entering the command <pwd>

2. Now as per question use <mkdir> command to create a new directory named "HomeworkLib_dir"; use <cd HomeworkLib_dir> command

3. we can check the new directory is created inside the present directory by <ls> command

Here the color of the "HomeworkLib_dir" is green as it is a directory.

4. Change into the directory using command <cd directory_name>; here my directory name is "HomeworkLib_dir"

5. we can check the present working directory by <pwd> command

6. Now create another directory inside present directory named "HomeworkLib_dir_inside" by entering command <mkdir HomeworkLib_dir_inside>

7. Now we can see the new directory in present working directory by command <ls>

8. go to the new directory by the command <cd HomeworkLib_dir_inside>

9. now check present working directory by using command <pwd>

10. now enter <cd> command

11. now check the present working directory by using command <pwd>

  

So here we observed that when the command <cd> is entered without any argument then it comes to the home/root directory of the user.