Bash

Bash is a command line-based shell program for UNIX/Linux systems.

Index of commands

Basic commands

• pwd prints the current working directory.
• ls prints what is in the current working directory.
• cd changes the current directory.
  • cd .. navigates up a folder.
  • cd foldername navigates into a folder.
  • For directories with spaces, we can wrap the folder name in quotation marks to access properly.
• mkdir foldername creates a new sub-directory.
• cp file1 dir/file1 copies file1 to the second path/name specified. This also allows us to create a copy with a different name of the folder.
• rm deletes a file.
  • -d for removing empty directories.
  • -r for removing non-empty directories.
• man gives us the manual page for a given command.
• ./programname will run a given program.
  • ./programname < input.txt will run the program against the inputs in a txt file — which is super convenient for debugging.
• chmod changes user permissions.