Ubuntu Linux Add a User To Group www-data ( Apache Group )

Originally published at: https://www.cyberciti.biz/faq/ubuntu-add-user-to-group-www-data/

How do I add a user to the Apache group called www-data under Ubuntu or Debian Linux server operating systems using the command line option?

Linux sysadmin blog - Linux/Unix Howtos and Tutorials - Linux bash shell scripting wiki