An HPC system is accessed remotely and has its particular file systems that contain data and programs to execute. Learning the ways of general interaction with the remote system and the tools involved is essential for newcomers.
Users must connect to an HPC system typically using the Secure Shell (SSH), which then starts a shell and allows the interactive access. When the user disconnects, such a session is terminated. A server-sided session that persists after disconnection enables the user to execute long-running programs remotely and allows the continuation of a previous session seamlessly. Data transfer between a local user system (e.g., desktop or laptop) and a remote system requires special tools. Interactive access is also allowed.
The tools discussed here are generally valid for systems using Linux, Mac, Windows, and also mobile devices.