Have you ever heard of (or used) a group password in Linux? For me this strange concept was new, but here's what you can use it for.
A group password in Linux allows a user to temporarily (in a subshell) gain extra permissions of a group, after successfully entering the group password.
To set a group password use gpasswd:
# gpasswd finance
Re-enter new password:
To gain those extra permissions you can use newgrp:
$ newgrp finance
Some of the disadvantages are: