I want to add a user to the linux system from a script, but I don't want to invent or care for the password. This should be done automatically.
The goal is to generate ssh-keys and this user needs only to login remotely. Or alternatively this user will be use from a sudo user via
sudo su - thatuser.
I want to save the hassle inventing and typing some secure password every time I create such a user, and also do this from scripts.
No one should be able to login with password as this user, so my idea is he gets a good random password but nobody knows it.
I could write a script that generates something ramdom but mabye there is something built in? Or just deactivate the password (so that password login is not possible, but ssh login with keys and
sudo su - thatuser works fine.
Edit: There are already some answers, great, but I am still not sure how to do it. How would the script look like?
It should behave like adduser and create everything standard (like std. home dir, skeleton copied, group with the same name)
Edit2: In the end and with your the help I found a solution that works and I want to share it. This is a script that I call "adduser-nopasswd" and I put it into /usr/local/sbin (is this a good place?) and it can be executed only by root. It takes one argument, which is the name for the new group and user at the same time:
#!/bin/sh -e # the -e makes the script exit immediateley if one command fails NAME=$1 groupadd $NAME useradd --create-home -d /home/$NAME --shell /bin/bash -g $NAME $NAME
Any comments on this function?