What & How: Add Sudo User in any Ubuntu System.

What & How: Add Sudo User in any Ubuntu System.

1. Create a new user

adduser username

2. Add it to Sudoers Group so it can have the privilege of sudo access.

usermod -aG sudo username

3. Now If you want to enable password-based login for this user and you are getting an error like "Permission denied (public key)", it means that you can't log in with a password. You can only log in with the key. 

Steps to enable password based login:

1. edit sshd_config file 

vi /etc/ssh/sshd_config

2. Edit two lines

      - PasswordAuthentication yes
      - PermitRootLogin yes # if and only if you want to enable password authentication for root user  #Optional

3. Set password of the newly created user (If not set earlier) (optional)

passwd username  # set that user's password

4. service ssh restart


Now try login with that credentials, We hope it works!!!


PS: sshd_config file name can be different for different Ubuntu OS/ Debian OS versions. 



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