University of Groningen https://wiki.hpc.rug.nl/ 2026-05-06T11:33:14+00:00 https://wiki.hpc.rug.nl/ https://wiki.hpc.rug.nl/_media/wiki/logo.png text/html 2020-08-27T09:46:41+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.hpc.rug.nl/habrok/command_line/start?rev=1598521601&do=diff Command line interface index text/html 2024-06-27T11:54:11+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.hpc.rug.nl/habrok/command_line/viewing_and_editing_files?rev=1719489251&do=diff Viewing and editing files Viewing files on the command line Very often the contents of a text file need to be inspected. There are two useful commands for that in Linux. Dump contents to screen: cat The first command is cat. You need to specify the filename as an argument: text/html 2023-03-20T10:22:32+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.hpc.rug.nl/habrok/command_line/working_on_the_command_line_-_part_1?rev=1679307752&do=diff Working on the command line - part 1 After logging into the system, you will be greeted by a command line prompt, which typically looks like this: username@login1:~ █ This line displays crucial information, including: * Your username: This is the first part of the prompt, displayed before the text/html 2023-03-21T12:36:39+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.hpc.rug.nl/habrok/command_line/working_on_the_command_line_-_part_2?rev=1679402199&do=diff Working on the command line - part 2 The first commands A good introduction on how to work on the command line is available at the software carpentries website. The tutorial on using the command line can be found at: <http://swcarpentry.github.io/shell-novice/> Since it is not useful to repeat all of this here, we will just give a very brief overview of some basic commands. Note that you can also try working with these commands in the exercises we have set up for our basic course: