Which of the statements is the result of the following command?

$ export PS2="[uw]\$ "

You have modified user bob’s login information. In the passwd file, you changed /bin/bash to /bin/false. What effect will this have on user bob?

You have a script called logout-users which will log out inactive users every hour between the hours of 6 p.m and 7 a.m., Monday through Friday.

Choose the best option for a crontab entry:

Which crontab entry could be used to set the system time at regular intervals?

Which of the following are elements of good password practice for users?

(Choose THREE)

Which of the following commands will lock the user foobar’s account?

Which command allows you to make a shell variable visible to subshells?

Which of the following commands shows ONLY the user id of Bob?

(Select TWO)

Which of the following is the best way to list all defined shell variables?

To test a shell script called myscript, the environment variable FOOBAR must be removed temporarily.

How can this be done?