how to list groups along with its users using terminal in ubuntu 14.04.5?

Question

For example: Group workers have 2 users: john and jony . What command do I have to use to list the members of group workers ?

These commands don't serve my purpose: compgen -u , compgen -g, cut -d ":" -f 1 /etc/passwd

Solution

Several options are available:

getent group <group_name> | cut -d":" -f4-

or

grep -iE "^adm" /etc/group | cut -d":" -f4-

Note you have to add the group name where I have "^adm, this will present members of that group.

See: man getent

Comments

[Terrance]

Does groups <username> from a terminal work?

[jabi]

yes its working :) Thank you so much :) :) :) Post it as an answer :)

[George Udosen]

I thought OP meant all users a particular group @Terrance?

[Terrance]

@George Yes, you are correct.

[Terrance]

Related: askubuntu.com/questions/136788/…

[George Udosen]

@jabi in addition to Terrance link this could be helpful too grep -iE "^adm" /etc/group | cut -d":" -f4-

[steeldriver]

If you know the (full) group name, then you can give it as a key to getent directly (avoiding the call to grep) e.g. getent group workers