topic Re: adding 500 users in Operating System - Linux

adding 500 users

Binu_5 — Thu, 24 Nov 2005 00:12:05 GMT

Hi

I have a requirement in adding 500 users in a linux systems ...Is there any easy way that I can do it instead of doing manullay

Thanks
Binu

Re: adding 500 users

Gopi Sekar — Thu, 24 Nov 2005 01:11:24 GMT

if the user names are some sort of continuous like (user1, user2 etc) then you should be able to do it with simple scripting.

otherwise also, if you have list of usernames in a text file then you could use following script:

## script assumes you have one username in a line, the file name is assumed to be user-list
## It adds the users using useradd command, creates the home directory (as per username)
## sets the group id as 100 (users group), sets the login shell as /bin/bash
## after creation sets the password as same as username.

#!/bin/bash

while read userid
do
echo "Creating useraccount $userid"

useradd -m -g 100 -s /bin/bash $userid
if [ $? == 0 ]; then
echo "created successfully"
else
echo "failed to create user account $userid"
exit
fi

echo $userid | passwd --stdin $userid

done < user-list

Hope this helps,
Gopi

Re: adding 500 users

LiPEnS — Thu, 24 Nov 2005 01:23:33 GMT

Hi
do this in script:

#!/bin/bash
i=1000
while test $i -lt 1500
do
/usr/sbin/useradd -u $i -g group -d /home/user$i -s /bin/bash -m user$i
done

Regards

Re: adding 500 users

Muthukumar_5 — Thu, 24 Nov 2005 02:13:45 GMT

As a root user you can use useradd utility to add users with shell scripting loop.

index=1
while [[ ${index} -lt 501 ]]
do
/usr/sbin/useradd
let index=index+1
done

Post your requirement of user details as,

user Id from to.
group name / group ID
home directory
etc.
details to give exact script.

hth.

Re: adding 500 users

Binu_5 — Thu, 24 Nov 2005 03:18:01 GMT

Hi Gopi

I want the user to be like user1 to user500 no need of taking from user-list
where shall i mention that

Thanks
Binu

Re: adding 500 users

Gopi Sekar — Thu, 24 Nov 2005 03:31:19 GMT

Then change the script as follows (only changes in the while loop and setting up userid variable).

change the username however you want(next to do statement)

#!/bin/bash

let i=1
while [ $i -le 500 ]
do
userid="user"$i
let i=$i+1

echo "Creating useraccount $userid"

useradd -m -g 100 -s /bin/bash $userid
if [ $? == 0 ]; then
echo "created successfully"
else
echo "failed to create user account $userid"
exit
fi

echo $userid | passwd --stdin $userid

done

Hope this helps,
Gopi