When installed, the firewall will block any incoming connection by default. Therefore you need to allow incoming connections to SSH server before turning UFW on. Use the command:
sudo ufw allow 44933/tcp
To check, you have to make sure whether the port corresponds to the listener port of SSH server with the command:
sudo ufw show added
Turn on UFW:
sudo ufw enable
Check the current active rules:
sudo ufw status
Exit the SSH connection and then restore it. Now the VPS server is installed and protected.
Table of Contents
Adding new user
It’s recommended to add new users during VPS installation to limit the access rights and exclude unauthorized access to the system.
First, connect to the VPS. It’s better to do it via SSH. Run the command of adding a new user:
$ sudo adduser <username>
Now check:
$ su — username
You’ve just created a new user with limited sudo rights. You can allocate admin rights to non-root users too. We’ll talk about it later. If there are many users, it’s recommended to check the rights settings from time to time. To do so, use the following command:
sudo dpkg-reconfigure tzdata
Rebuilding the kernel
After installing and basic setup of the VPS, you may need to update the kernel to its final version. Let’s see how it works for Linux.
First and the server as Root user with your general SSH client.
Update
You have to update the Ubuntu repository and all of its packages:
sudo apt-get update
sudo apt-get upgrade -y
