How to Install Fail2Ban on Ubuntu 18.04

Fail2Ban is a popular open-source application designed to protect Linux servers from various types of attacks. It works by monitoring log files for suspicious activities and then takes action, such as banning IP addresses, to block potential attackers.

To install Fail2Ban on Ubuntu 18.04, follow these steps:

1. Open a terminal on your Ubuntu 18.04 server.
2. Update the package list by running the following command:

   sudo apt update

3. Install Fail2Ban by running the following command:

   sudo apt install fail2ban

4. After the installation is complete, Fail2Ban will start automatically. However, you may want to check its status to ensure it's running fine. You can do this by running the following command:

   sudo systemctl status fail2ban

5. If Fail2Ban is not running, you can start it by running the following command:

   sudo systemctl start fail2ban

6. To enable Fail2Ban to start automatically at boot, run the following command:

   sudo systemctl enable fail2ban

Fail2Ban is now installed on your Ubuntu 18.04 server. You can configure its settings by modifying the configuration file located at /etc/fail2ban/jail.conf.