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 ...