When I offer to create new user, I call it jack, you can use any other username.


If it's setup of server, you have to disable ssh with root and allow it with a custom user.

First time connection


Check IP

/sbin/ip -4 addr
/sbin/ip -6 addr

Update Linux and add new user

apt update
apt upgrade
adduser jack
usermod -aG sudo jack

Enable firewall

sudo apt install -y ufw vim
sudo ufw app list
sudo ufw allow OpenSSH
sudo ufw enable
sudo ufw status

Copy SSH keys from root to jack

mkdir /home/jack/.ssh/
cp /root/.ssh/authorized_keys /home/jack/.ssh/
chown -R jack:jack /home/jack/.ssh/
chmod -R 700 /home/jack/.ssh/

Exit SSH connection


Connect to server with new user


If works, disallow ssh connection with root.

sudo vim /etc/ssh/sshd_config

Find PermitRootLogin line and replace yes to no and restart sshd daemon. Disconnect yourself with exit and you won't able to connect with root, connect with custom user now.

-PermitRootLogin yes
+PermitRootLogin no
sudo systemctl restart sshd.service

Change root password

sudo -i