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Thursday, July 23, 2020

to set root user for Jenkins to follow below steps for CentOs

1. Open up the script

vim /etc/sysconfig/jenkins

2. Find this $JENKINS_USER and change to “root”:

$JENKINS_USER="root"

3. Then change the ownership of Jenkins home, webroot and logs:

chown -R root:root /var/lib/jenkins
chown -R root:root /var/cache/jenkins
chown -R root:root /var/log/jenkins

4) Restart Jenkins and check the user has been changed:

service jenkins restart

ssh ec2-user@<ip> -i <ssh key>

ubuntu@ip-172-31-24-53:~$ sudo -i
root@ip-172-31-24-53:~#

Use the adduser command to add a new user to your system.

adduser <username>

root@ip-172-31-24-53:~# adduser test

Set and confirm the new user’s password at the prompt. Use
strong password to secure account

root@ip-172-31-24-53:~# passwd test
Enter new UNIX password:
Retype new UNIX password:
passwd: password updated successfully

Use the usermod command to add the user to the sudo group.

usermod -aG sudo username

root@ip-172-31-24-53:~# usermod -aG sudo test

By default, on Ubuntu, members of the sudo group have sudo privileges.

Test sudo access on new user account

Use the su command to switch to the new user account.

root@ip-172-31-24-53:~# su test

su - username

As the new user, verify that you can use sudo by prepending “sudo” to the command
that you want to run with superuser privileges.

test@ip-172-31-24-53:/root$ sudo ls -la /root