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Add multiple users to a group

This is a discussion on Add multiple users to a group within the Linux software forums, part of the Linux Getting Started category; Can someone help me? I want to be able to add multiple users to a group. Is there a script ...


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Old 10-30-2007, 08:34 PM
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Default 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
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Old 10-31-2007, 06:19 PM
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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.
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Old 11-02-2007, 11:04 PM
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Thanks, I will try this. Thank you for your help.

chuck
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