adding 500 users

[Binu_5]

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

[Gopi Sekar]

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

[LiPEnS]

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

[Muthukumar_5]

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.

[Binu_5]

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

[Gopi Sekar · Accepted solution]

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