Create a sudo user in script with no prompt for password, change to user without interrupting script

Question

This is what I'm trying to do in a script. It works here manually, but prompts me for a password. How do I:

Create a new user
With sudo privs
Switch to that user

Continue executing the rest of the script

sudo adduser centos
sudo passwd centos
usermod -aG wheel centos
sudo su centos

I have tried the following but in Centos 7 bash, --disabled-password and -gecos both say "option not found."

adduser --disabled-password --gecos "" username

You don't want --disabled-password. That would let anyone access that user account without a password. — Charles Duffy
– Charles Duffy, Commented May 8, 2017 at 17:15
And by the way, it's not bash that provides adduser -- you'd have the same problem with CentOS 7 running adduser from any other shell, or running it without a shell at all (ie. with subprocess.Popen(['adduser', ...], shell=False) in Python). — Charles Duffy
– Charles Duffy, Commented May 8, 2017 at 17:15
Charles I don't really care because it's a vagrant box to setup a local instance for developers. They can do WHATEVER they want with the entire box. — Mark Jones
– Mark Jones, Commented May 8, 2017 at 17:15
"run the rest of the script with this user", by the way, is best done by encapsulating the rest of your script in a heredoc. — Charles Duffy
– Charles Duffy, Commented May 8, 2017 at 17:16
btw, see stackoverflow.com/a/24696790/14122 re: the "change to this user for the rest of the script" part of things. Personally, I think this question is too broad in scope to be a good fit as it is -- it's asking something like three different things, each of which has already been individually asked and answered elsewhere on the site. — Charles Duffy
– Charles Duffy, Commented May 8, 2017 at 17:21

czvtools · Accepted Answer · 2017-05-09 20:21:26Z

0

You don't need sudo su centos because your script would be interrupted by a terminal. If the following commands are actually "./install.sh" (like) that have to be started by "centos" user, then you can do the following modification:

sudo adduser centos
sudo passwd centos
usermod -aG wheel centos
sudo su - centos -c ./install.sh
sudo su - centos -c ./install_another.sh

sudo su - centos -c "./install_more.sh ; cd /tmp ; ./install_almostlast.sh"

sudo su - centos -c bash -c "cd /somewhere; ./install_more.sh
        cp /tmp/files /somewhere
        ./install_last.sh
        rm /tmp/install.sh"

Between double quotes you can write a whole script if you want and are careful of the content and quoting.

answered May 9, 2017 at 20:21

czvtools

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