I'm kinda new to linux so bear with me. I followed a tutorial on how to grant root access to other users and what I did was, in `/etc/passwd/` I changed the other users' uid/gid to `0:0`. 

The problem is that once I block ssh access to user root by changing `PermitRootLogin` to no in `sshd_config`, all other users that share the `0:0` uid/gid also loose access via ssh to the box.

Help please..., or guide in right path to achieving this... ***the box does not have internet access, so, installing sudo/sudoer to manage users it's not possible***