Which file contains the date of the last change of a user’s password?

Which environment variable should be set in order to change the time zone for the commands run from within the
environment variable’s scope? (Specify the variable name only.)

Each entry in a crontab must end with what character?

To prevent a specific user from scheduling tasks with at, what should the administrator do?

Which of the following crontab entries will execute myscript at 30 minutes past every hour on Sundays?

Which of the following files assigns a user to its primary group?

Which of the following commands should be added to /etc/bash_profile in order to change the language of messages for an
internationalized program to Portuguese (pt)?

In which file, if present, must all users be listed that are allowed to use the cron scheduling system? (Specify the full name
of the file, including path.)

Which commands can be used to change a user’s account aging information? (Choose THREE correct answers.)

Which command is used to add an empty group to the system? (Specify ONLY the command without any path or
parameters.)