The most common way of connecting to a remote Linux server is through SSH.
Copy and paste the command-line examples given, substituting the highlighted values with your own values. Use the Contents menu on the left side of this page (at wide page widths) or your browser’s find function to locate the sections you need. Most sections are not predicated on any other, so you can use the following examples independently. Use whichever subsequent sections are applicable to what you are trying to achieve. Read the SSH Overview section first if you are unfamiliar with SSH in general or are just getting started. This can be used as a quick reference when you need to know how to connect to or configure your server in different ways. In this cheat sheet-style guide, we will cover some common ways of connecting with SSH to achieve your objectives. After connecting, all commands you type in your local terminal are sent to the remote server and executed there. It provides a text-based interface by spawning a remote shell. SSH is a secure protocol used as the primary means of connecting to Linux servers remotely. Changing Port Forwarding Options on an Existing SSH Connection. Placing an SSH Session into the Background. Forcing a Disconnect from the Client-Side (How to Exit Out of a Stuck or Frozen Session). Using SSH Escape Codes to Control Connections. Configuring Dynamic Tunneling to a Remote Server. Configuring Remote Tunneling to a Server. Configuring Local Tunneling to a Server. Multiplexing SSH Over a Single TCP Connection. Keeping Connections Alive to Avoid Timeout. Defining Server-Specific Connection Information. Forwarding X Application Displays to the Client. Allowing Root Access for Specific Commands. Limiting the Users Who can Connect Through SSH. Changing the Port that the SSH Daemon Runs On. Forwarding your SSH Credentials to Use on a Server. Adding your SSH Keys to an SSH Agent to Avoid Typing the Passphrase. Logging in to a Server with a Different Port. Running a Single Command on a Remote Server. 
Copying your Public SSH Key to a Server Manually. Copying your Public SSH Key to a Server Without SSH-Copy-ID. Copying your Public SSH Key to a Server with SSH-Copy-ID. Removing or Changing the Passphrase on a Private Key. 
Generate an SSH Key Pair with a Larger Number of Bits.
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