Problem with installing fiveM vps linux

Hello, my friend to buy a machine so we start to create a fivem server, the problem is that I am the only one to know dev and I can not connect to the vps via putty or sftp. My friend can not connect to his phpmyadmin either.
The question is, how to give me the rights to return
Well configure phpmyadmin
thank you in advance

He can configure the linux vps properly and add different users properly instead of operating on root.

Like a user account for him, and one for you.

Yes we know with the “adduser” and more but it’s not working idk why …

because you do not set groups. Just a blind guess.

Can you send me the commandline? I’m novice sorry :frowning:

cat /etc/group
groups
https://linux.die.net/man/8/usermod

usually used with

usermod -G ssh -a username or so

Network error: Connection timed out