Adding and Removing Users
Its also worth taking a look in /etc/passwd for listing of users.
adduser blah userdel blah
groupadd users //Create a Group adduser username users //Add a Member into the above group (Not making it their primary group) //Putting a user into a group manually. This will not make it their primary group! vi /etc/group adm:x:4:user1,user2
Make the newgroup the PRIMARY one for the user:
Particularly useful, as adding a user into a group will not change their primary group!!
usermod -g newgroup user
Add a NEW user into an EXISTING Group
//This is what should be normally done, as it makes users their PRIMARY group, instead of making a new one!! adduser --ingroup users username //dont know if this is essential, but add them into the groups file in /etc - adduser username users
Add a user into a group
Instead of editing manually /etc/group, this is the preferred way:
adduser username group
Got from http://www.oreilly.com/catalog/debian/chapter/book/ch07_01.html
More info at: http://learnlinux.tsf.org.za/courses/build/sys-admin/ch05.html
and More detailed at: http://debianhelp.co.uk/userandgroup.htm