tail - output the last part of files
Display the last 10 lines of a file:
tail /var/log/messages
Display the last 20 lines of a file:
tail -n 20 /var/log/messages
Display the last lines of a file in real-time:
tail -f /var/log/messages
Display the last 30 bytes of a file:
tail -c 30 /var/log/messages
Display the last 10 lines of a file with the filename:
tail -nv 10 /var/log/messages
Display tail command help:
tail --help
Display tail command version:
tail --version