====== Intermediate Unix Commands ======

===== Permissions =====

UNIX organizes permissions by user, group, and others.  There are three different permissions available: read, write, and execute

''chmod'' is the command to change permissions

==== Groups ====

To change the group associated with a file, use ''chgrp''


===== Finding Content: grep =====

===== Finding Files: find =====
===== Finding Differences Between Files: diff =====

===== Beginning of Files: head =====

===== End of Files: tail =====

===== Viewing Services Listening on a Port =====

  lsof -i :<port>

e.g., 

  lsof -i :8080