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 their password   AIX is running on the system   unfortunately  chpasswd is unavailable   I have expected installed  but I am having trouble with that also   here is what I thought would work   echo  oldpassword nnewpasswd123 nnewpasswd123    passwd user   However once run the script I am prompted with please enter user s old password  shouldn t they all be echoed in    I am a beginner with shell scripting and this has been baffled

User · Answer

Use GNU passwd stdin flag   From the man page       --stdin           This option is used to indicate that passwd should read the new password from standard input  which can be a pipe     NOTE  Only for root user   Example    adduser foo    echo  NewPass   passwd foo --stdin Changing password for user foo  passwd  all authentication tokens updated successfully    Alternatively you can use expect  this simple code will do the trick      usr bin expect spawn passwd foo expect  password   send  Xcv15kl r  expect  Retype new password   send  Xcv15kl r  interact   Results      passwd xp  spawn passwd foo Changing password for user foo  New password   Retype new password   passwd  all authentication tokens updated successfully

User · Answer

If you can use ansible  and set the sudo rights in it  then you can easily use this script   If you re wanting to script something like this  it means you need to do it on more than one system   Therefore  you should try to automate that as well

User · Answer

You can try       echo -e  newpasswd123 nnnewpasswd123    passwd user

User · Answer

You can try   echo  USERNAME NEWPASSWORD    chpasswd

User · Answer

You need echo -e for the newline characters to take affect  you wrote  echo  oldpassword nnewpasswd123 nnewpasswd123    passwd user   you should try  echo -e  oldpassword nnewpasswd123 nnewpasswd123    passwd user   more than likely  you will not need the oldpassword n portion of that command  you should just need the two new passwords   Don t forget to use single quotes around exclamation points   echo -e  new     passwd123 nnew     passwd123    passwd user

User · Answer

usr bin python  import random import string import smtplib import sys import os from subprocess import call import socket  user   sys argv 1  receivers      s domain com   user      This will generate a 30 character random password    def genrandpwd            return     join random SystemRandom   choice string ascii lowercase   string digits   string ascii uppercase   string punctuation  for   in range 30    def change passwd user  password           p   os popen   usr bin passwd  s   user   w           p write password          p write   n           p write password      p close    def chage user           agepasswd   call    usr bin chage    -d    0     s   user    def mailpwd user  password           sender    admin  s   socket gethostname           subj       IMPORTANT     Unix password changed for user  s   user         text    The password for the  s user has changed  the new password is  n n  s  n n Note  The system will force to change the password upon initial login  Please use the password provided in the mail as your current password and type the password of your choice as the New password    user  password          message   message    Subject   s n n s     subj  text          smtpObj   smtplib SMTP  mailrelay-server domain com           smtpObj sendmail sender  receivers  message          smtpObj quit    def main            newpwd   genrandpwd           change passwd user  newpwd          chage user          mailpwd user  newpwd   if   name         main             main

User · Answer

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

User · Answer

Just this  passwd  lt  lt EOF oldpassword newpassword newpassword EOF   Actual output from ubuntu machine  sorry no AIX available to me    user host    passwd  lt  lt EOF oldpassword newpassword newpassword EOF  Changing password for user   current  UNIX password  Enter new UNIX password  Retype new UNIX password   passwd  password updated successfully user host

User · Answer

In addition to the other suggestions  you can also achieve this using a HEREDOC   In your immediate case  this might look like      usr bin passwd root  lt  lt EOF test test EOF

User · Answer

printf  oldpassword nnewpassword nnewpassword    passwd user

User · Answer

For me this worked in a vagrant VM   sudo  usr bin passwd root  lt  lt EOF 12345678 12345678 EOF

User · Answer

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

User · Answer

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  amp  gt   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

[bash] Changing an AIX password via script?

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