SSH (Secure Shell) is a vital service for managing remote servers, but the default settings can make your system vulnerable to brute force attacks. This guide explains how to change the SSH port and secure it with a strong password on CentOS 8, AlmaLinux 8/9, Rocky Linux 8, and Ubuntu 22.04.
Step 1: Prerequisites
install putty https://www.putty.org/
Root access to the server or a user with sudo privileges.
Backup your current SSH configuration:
sudo cp /etc/ssh/sshd_config /etc/ssh/sshd_config.bak
Step 2: Change SSH Port
Edit the SSH configuration fil...
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