[SOLVED] Creating linux username and password remotely

call_krushna · 04-11-2014, 04:50 AM

I am running script which generated strong password and takes input as user name and calls remote script to create username and password .

script goes like this

USERNAME=$1

PASS=`cat /dev/urandom|tr -dc 'a-zA-Z0-9-!@#%()+{}$|:?='|fold -w 10 | head -n 1| grep -i '[!@#%()+{}|:$?=]'`

ssh -i /home/ubuntu/test.pem ubuntu@192.168.10.32 "sudo /bin/bash /root/useradd.sh $USER $PASS "

It works fine ,if the password does not contain any extra characte like | , & and $ .

e.g.

ssh -i /home/ubuntu/test.pem ubuntu@192.168.10.32 "sudo /bin/bash /root/useradd.sh testuser1 12345 "

it fails with strong password as follows .

ssh -i /home/ubuntu/test.pem ubuntu@192.168.10.32 "sudo /bin/bash /root/useradd.sh testuser1 v|9q4TT8={ "

Is there any workaround for this .

Smokey_justme · 04-11-2014, 05:36 AM

Code:

ssh -i /home/ubuntu/test.pem ubuntu@192.168.10.32 "sudo /bin/bash /root/useradd.sh '${USER}' '${PASS}' "

should do the trick

call_krushna · 04-11-2014, 06:36 AM

Thanks for the information . It is not working for password like OvmE1c(IXq .

my useradd.sh script contains following lines .

set -x
USER=$1
PASS=$2
useradd -M -s /bin/nologin $USER
echo $USER:$PASS | chpasswd

Regards
Krushna

Smokey_justme · 04-11-2014, 08:24 AM

Hmm.. passwords like "OvmE1c(IXq" should work.. I've got nothing of the top of my head..

Try to change your script like this:

Code:

USER="${1}"
PASS="${2}"
useradd -M -s /bin/nologin ${USER}
echo ${USER}:${PASS} | chpasswd

P.S. Always probe that simple passwords still work.. Just to be sure a change didn't brake anything..