06. Werken met paden

Executing Commands

The Command PATH:

• Most common commands are located in your shell’s “PATH”, meaning that you can just
  type the name of the program to execute it.

  Example: Typing “ ls” will execute the “ ls” command.

• Your shell’s “PATH” variable includes the most common program locations, such as

  /bin, /usr/bin, /usr/X11R6/bin, and others.

• To execute commands that are not in your current PATH, you have to give the complete
  location of the command.

  Examples: /home/bob/myprogram
  ./program (Execute a program in the current directory)
  ~/bin/program (Execute program from a personal bin directory)

 

Command Syntax

• Commands can be run by themselves, or you can pass in additional arguments to make them do
  different things. Typical command syntax can look something like this:

  command [-argument] [-argument] [--argument] [file]

  Examples:
  ls List files in current directory
  ls -l Lists files in “long” format
  ls -l --color As above, with colourized output
  cat filename Show contents of a file
  cat -n filename Show contents of a file, with line numbers