Command Line Interface

Description:

• Use man command for manual
• Check if a command is builtin by: type $command
• dpkg -l to list packages
• includes:
  • bash
  • PowerShell

Command Syntax:

• A command includes:
  • command
  • subcommand (optional)
  • option (the one with —)
  • arguments
• Normal command: no subcommand
  • ex: ls -a
• Command subcommand
  • ex: ip addr show eth0

Exit code:

• View in man page
• check by echo $?