topic Re: How to change passwd with in the scrip with out asking in the terminal in Operating System - HP-UX

How to change passwd with in the scrip with out asking in the terminal

chakribobby — Fri, 23 Nov 2007 10:19:14 GMT

Hi
I need to change the password for the user with in the scrip(with in the scrip i have given the password)
While running that scrip it should not ask for password
That scrip is run by root
Thanks in advance

Re: How to change passwd with in the scrip with out asking in the terminal

Arturo Galbiati — Fri, 23 Nov 2007 11:07:29 GMT

Hi,
please, can you post your original script used to given teh passwords?
This may help in fix your problem.
Rgds,
Art

Re: How to change passwd with in the scrip with out asking in the terminal

chakribobby — Fri, 23 Nov 2007 11:15:01 GMT

thanks for you reply
here i am giving you the snap shot

New_passwd=xzy #is the new password
passwd user

with in the scrip If we use above command it will ask for passwd in the terminal when we run that script

New_passwd=xzy #is the new password
passwd user < New_passwd

what I need is it should not ask for password when I run it

Re: How to change passwd with in the scrip with out asking in the terminal

VK2COT — Fri, 23 Nov 2007 21:09:41 GMT

Hello,

Check this:

http://www.circlingcycle.com.au/Unix-sources/add-batch-Unix-accounts.pl.txt

You will easily see commands you can use to change user's password in HPUX, Solaris, AIX, Linux, and Tru64 in a script :)

Cheers,

VK2COT

Re: How to change passwd with in the scrip with out asking in the terminal

chakribobby — Sat, 24 Nov 2007 02:56:21 GMT

Thanks for you reply
It is more complex
Can you given me a small example

Re: How to change passwd with in the scrip with out asking in the terminal

chakribobby — Sat, 24 Nov 2007 02:58:43 GMT

in shell script

Re: How to change passwd with in the scrip with out asking in the terminal

VK2COT — Sun, 25 Nov 2007 17:44:36 GMT

It is one-liner:

/usr/sam/lbin/usermod.sam -p passwordhash

Your problem is how to find out the
passwordhash. It is the encrypted password
string (the one you see in /etc/passwd or
/etc/shadow...)

Normally, you would have to use some kind
of random password generators. That is
where Perl and Expect scripts, and other tools come handy.

If you already have a good passwordhash
string, then you are OK.

The alternative is to use GNU useradd with
flag "-p":

You get an already-encrypted passwd, and use
the -p option, along with
the other options can automate this process:

useradd -d /home/user1 -g users -m -k -p passwordhash -s /bin/ksh

So, in the end, simple lines for your script:

#!/bin/sh
PATH=/usr/sbin:/sbin:/bin:/usr/sam/lbin; export PATH

MYSALT="somestring"
MYPASS="whateverpassword"

MYENCPASS=`perl -e 'print crypt("mypassword", "salt"),"\n"'`

usermod.sam -p $MYENCPASS username

exit 0

It is a trivial exercise to add more features
in the script (like error checking, or adding support for command-line arguiments).

Please do not forget to assign points if you find any advice in ITRC forums useful.

Cheers,

VK2COT