Posts tagged passwd

expect: update linux passwords through passwd from a list
posted on 2015-11-04 14:42:48

I know this is hacky, but I was in dire need:

IFS=$'\n'; for i in `cat pw`; do NAME=`echo $i | awk '{print $1}'`; PASS=`echo $i | awk '{print $2}'`; if getent passwd $NAME &>/dev/null; then expect -D0 -c "spawn passwd $NAME; expect \"Enter new UNIX password: \"; send \"$PASS\\r\"; expect \"Retype new UNIX password: \"; send \"$PASS\\r\";exit"; sleep 1; fi; done

Credentials were contained in a single .txt file, username and passwords, nothing else existed in there, both were separated by whitespaces. The file was called pw and laid in the same folder where the line above was run.

A watch -n1 -d /etc/shadow is helpful to see what happens. Still check your passwords afterwards!

UPDATE:

Try chpasswd. I feel stupid for not googling enough, at least a little.

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