With tail, you can view a Linux log file as the system writes to it in real time. So while you’re trying to troubleshoot that system, you can follow the syslog, the auth.log, faillog, kern.log ...

Use the basic tail command to display the last 10 lines of a file. Tail the desired number of lines by specifying the -n option. Learn how to use the +N option to display lines starting from the Nth ...

If you have a command that outputs a lot of data to the terminal, you might want to send that output to a file for easier (or later) viewing or sharing. Jack Wallen shows you how.