SSH (Secure Shell) allows secure remote access to a server. Below are instructions for Windows, macOS, and Linux.

For Windows

Method 1: Using PowerShell (Windows 10/11)

1. Open PowerShell (Press Win + X → Select PowerShell or Terminal).

2. Enter the command:

   ssh root@server_ip -p 22

   (Replace "server_ip" with your server’s IP/hostname. If you use a non-default SSH port, replace "22" with your port number.)

3. If prompted, type yes to accept the fingerprint.
4. Enter your password (or use SSH keys if configured).

Method 2: Using PuTTY (Alternative)

1. Download PuTTY (https://www.putty.org).
2. Open PuTTY → Enter the server’s IP/hostname and port (default: 22).
3. Click Open → Log in with your credentials.

For macOS & Linux

Using Terminal (Built-in SSH Client)

1. Open Terminal (⌘ + Space → "Terminal" on macOS / Ctrl+Alt+T on Linux).

2. Run:

   ssh root@server_ip -p 22

   (Replace "server_ip" with your server’s IP/hostname. If you use a non-default SSH port, replace "22" with your port number.)

3. If prompted, type yes to accept the fingerprint.
4. Enter your password (or use SSH keys if configured).

For cPanel server you can access your server via SSH using cPanel's built-in Terminal (Web-based) on Windows, macOS, and Linux.

Accessing cPanel Terminal (any OS)

1. Log in to your cPanel WHM system (usually https://yourdomain.com:2087).
2. Under the "Server Configuration" section, find and click "Terminal".
3. The browser-based terminal will open under root user.

Accessing Plesk Terminal (any OS)

1. Log in to your Plesk server as admin/root (usually https://yourdomain.com:8443).
2. Go to "Extensions" in left sidebar and switch to "My Extensions" tab.
3. Check if you see "SSH Terminal" extension in the list. If you don't, then install by by taking these steps:
   1. Switch to "Extensions Catalog" tab.
   2. Type "SSH Terminal" in search bar and click on the found entry.
   3. Click "Get if Free" button to install it and wait while the process completes.
4. Go to "Tools & Settings" in left sidebar and click on "SSH Terminal" item.
5. The browser-based terminal will open under root user.