How to find Ubuntu user password?

Question

ubuntu

Hello!
Trying to install ejudge on ubuntu 14.04. I follow the instructions . At the Configuration
step , I have a problem. In one of the steps, I created the ejudge user with the command:

sudo groupadd ejudge
sudo useradd ejudge -s /bin/bash -m -d /home/ejudge -g ejudge
sudo adduser ejudge sudo

Now I'm trying to open the /home/ejudge/ejudge/ejudge-setup. Until then, everything was going well. I specified all the parameters, clicked "Save script" and got "permission denied". Tried to run the script via sudo, but I'm prompted for the sudo password of the ejudge user, which I don't know.
How to recognize him?

Answer 1

Problem solved. I managed to set up the system without sudo, it was enough to run the necessary one through the courts of my user on behalf of ejudge.

Answer 2

So the password is empty.
Go to ejudge, set a password.