Thread: Add multiple users to a group

Can someone help me? I want to be able to add multiple users to a group.

Is there a script that will allow me to do this? The users already exist I would like to add them to a particular group.



thanks

chuck

Assuming that usernames are in users.txt file

Code:

user1
user2
user3
user4

Here is the script, that keep old member ship and add user to new groups defined by $nGROUPS, as usual backup /etc/group and other files before running script:

Code:

#!/bin/bash
INPUT=users.txt
USERS=$(cat $INPUT)
nGROUPS="ftp, sales"
mGROUPS=""
for u in $USERS
do
 pGgroups="$(id -Gn ${u} | sed -e 's/ /,/g')"
 mGROUPS="${pGgroups},${nGROUPS}"
 # old version 
 usermod -G $mGROUPS $u
 # new version group add needs no hack
 # usermod -a $nGROUPS $u
done

Above script is just demonstration, feel free to modify as per your UNIX / Linux setup.

Thanks, I will try this. Thank you for your help.

chuck