Changing an AIX password via script?

Question

I am trying to change a password of a user via script. I cannot use sudo as there is a feature that requires the user to change the password again if another user changes th

Answer 1

You can try :

echo -e "newpasswd123\nnnewpasswd123" | passwd user

Answer 2

printf "oldpassword/nnewpassword/nnewpassword" | passwd user

Answer 3

You can try

LINUX

echo password | passwd username --stdin

UNIX

echo username:password | chpasswd -c

If you dont use "-c" argument, you need to change password next time.

Answer 4

This is from : Script to change password on linux servers over ssh

The script below will need to be saved as a file (eg ./passwdWrapper) and made executable (chmod u+x ./passwdWrapper)

#!/usr/bin/expect -f
#wrapper to make passwd(1) be non-interactive
#username is passed as 1st arg, passwd as 2nd

set username [lindex $argv 0]
set password [lindex $argv 1]
set serverid [lindex $argv 2]
set newpassword [lindex $argv 3]

spawn ssh $serverid passwd
expect "assword:"
send "$password\r"
expect "UNIX password:"
send "$password\r"
expect "password:"
send "$newpassword\r"
expect "password:"
send "$newpassword\r"
expect eof

Then you can run ./passwdWrapper $user $password $server $newpassword which will actually change the password.

Note: This requires that you install expect on the machine from which you will be running the command. (sudo apt-get install expect) The script works on CentOS 5/6 and Ubuntu 14.04, but if the prompts in passwd change, you may have to tweak the expect lines.

Answer 5

Here is the script... 

#!/bin/bash
echo "Please enter username:"
read username
echo "Please enter the new password:"
read -s password1
echo "Please repeat the new password:"
read -s password2

# Check both passwords match
if [ $password1 != $password2 ]; then
echo "Passwords do not match"
 exit    
fi

# Does User exist?
id $username &> /dev/null
if [ $? -eq 0 ]; then
echo "$username exists... changing password."
else
echo "$username does not exist - Password could not be updated for $username"; exit 
fi

# Change password
echo -e "$password1\n$password1" | passwd $username

Refer the link below as well...

http://www.putorius.net/2013/04/bash-script-to-change-users-password.html

Answer 6

For me this worked in a vagrant VM:

sudo /usr/bin/passwd root <<EOF
12345678
12345678
EOF