script to change password for all users

dr46014 · #1 (**permalink**) 08-24-2009

We have a server where we have a number of user ids and we also have the list of old passwords in a CSV file.
Now we want to change the password of all the users and assign them a default password.Can we write a shell script to do that.
I am planning to read the user name and corresponding password from CSV file.But how to login to the server with the same user and change password
with passwd -r file command.
Once i type login the exported paramter values are lost.

Any suggestion or sample script will help.

thanks
Deepak

b33713 · #2 (**permalink**) 08-24-2009

with the --stdin option of the command 'passwd',you can do it easily as root

Code:

echo 'the old pass you read from csv file' | passwd --stdin user

dr46014 · #3 (**permalink**) 08-24-2009

Code:

user_id,old_password,new_password
dkrout,P@55word,dk@11word
sdas,P@55word,sd@12word
bkpradhan,P@55word,bk@19word
pthn,P@55word,pt@11word
nsap,P@55word,ns@11word

b33713 · #4 (**permalink**) 08-24-2009

sorry,i don't know how if you can't access root,i just tried 'sudo',didn't work
i guess its for the security,you need to be root to change others password 'in script'

dr46014 · #5 (**permalink**) 08-24-2009

can you frame the script assuming that i am the root user..
i will try to convenience SA team to implement it once the script is ready

b33713 · #6 (**permalink**) 08-24-2009

Code:

awk -F, 'NR!=1{system("echo "$3"|passwd --stdin "$1)}' yourCSVfile

dr46014 · #7 (**permalink**) 08-24-2009

Quote:

Originally Posted by b33713

Code:

awk -F, 'NR!=1{system("echo "$3"|passwd --stdin "$1)}' yourCSVfile

and..about the mail,if you changed their passwords,how do they login and check mail without know the new password?hehe

we can add another column and have the corresponding mail ids ... not unix mail...and use mailx -s .... that is quite possible...i dont understand the use of system here

---------- Post updated at 10:13 PM ---------- Previous update was at 10:09 PM ----------

Quote:

Originally Posted by dr46014

we can add another column and have the corresponding mail ids ... not unix mail...and use mailx -s .... that is quite possible...i dont understand the use of system here

this is not working in my system ....

---------- Post updated at 10:26 PM ---------- Previous update was at 10:13 PM ----------

Quote:

Originally Posted by dr46014

we can add another column and have the corresponding mail ids ... not unix mail...and use mailx -s .... that is quite possible...i dont understand the use of system here

---------- Post updated at 10:13 PM ---------- Previous update was at 10:09 PM ----------

this is not working in my system ....

won't this ask for old password and confirmation password if i am running it from root..as i dont have that access its not working .....
will it work in Sun Solaris too ??

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Bits Awarded / Charged to dr46014 for this Post
Date	User	Comment	Amount
08-24-2009	vgersh99	added code tags - charged 3K bits	-3,000

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