If you use Linux or MacOS X, terminal applications are included with the operating system.  Windows users will need to download a client such as [[https://www.chiark.greenend.org.uk/~sgtatham/putty/latest.html | PuTTY]] or some other ssh client. e.g. MobaXterm, Openssh for Windows, or Windows Subsystem for Linux. Secure Shell is a standard, encrypted means of connecting to remote servers.