Monitor a log file live

Sat, Apr 13, 2013

You can watch a log file as it grows using the following command:

tail -f -n 50 /opt/tomcat/logs/catalina.out

-f, --follow[={name|descriptor}]
          output appended data as the file grows; -f, --follow, and 
          --follow=descriptor are equivalent
-n, --lines=N
          output the last N lines, instead of the last 10; or use +N 
          to output lines starting with the Nth"