Connecting to a server via SSH

Prerequisites

• SSH Client: Ensure you have an SSH client installed. Most Linux/macOS systems have it pre-installed. For Windows, you can use tools like PuTTY or Windows Subsystem for Linux (WSL).
• Server Details: You'll need your server's IP address or hostname, along with your username and password (or SSH key). These details are typically found on your hosting provider's server management page.

IPv4: 192.168.1.100
Connect via SSH: `ssh root@192.168.1.100`
Root Password: ********

Step 1. Open terminal or command line

• Linux/macOS: Open the Terminal application.
• Windows: Open Command Prompt, PowerShell, or your preferred SSH client.

Step 2. Connect to the server

Use the following command to connect:

ssh username@server_ip_or_hostname

• Replace username with your actual server username, for example root.
• Replace server_ip_or_hostname with the IP address or domain name of your server, for example 192.168.1.100.

Example:

ssh john_doe@192.168.1.100

ℹ️ Info

If the system warns you about an unknown host key, confirm the connection by typing yes.

Step 3. Authenticate

• Password Authentication: If prompted, enter your password. Note that the password will not be visible as you type.
• SSH Key Authentication: If you have set up SSH keys, the connection will be established automatically without a password.

Once authenticated, you will be logged into the server and can start executing commands.

💡 Tip

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To disconnect from the server, type:

exit

Setup SSH key access

To avoid entering a password each time, set up SSH key authentication:

1. Generate an SSH key pair on your local machine:

ssh-keygen -t rsa -b 4096

2. Copy the public key to the server:

ssh-copy-id username@server_ip_or_hostname

Troubleshooting

• Connection Refused: Ensure the server is online and the SSH service is running.
• Permission Denied: Double-check your username, password, or SSH key setup.
• Network Issues: Verify your internet connection and that the server's IP/port is correct.