You want to display a list of all last logged in users. The file /var/log/wtmp exists. Which command would you use?
To ensure this directory is automatically created each time you add a new user, in what subdirectory should you create the directory?
Which command prints or adjusts the current limits on resources available to the shell and to processes started by it?
What file does the system administrator have to edit in order to have each machine send log entries to the new log server?
The very first line of a shell script should always contain what two characters at the beginning of the line?