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Wednesday, June 1, 2011

Shorthand at the Command Prompt

Some of these are specific to the bash shell. I have not experimented enough with other shells to know which are common to all shells. See also the ``Bash Reference Card'', SSC (2000), available online.

  • / - root directory
  • ./ - current directory
  • ./command_name - run a command in the current directory when the current directory is not on the path
  • ../ - parent directory
  • ~ - home directory
  • $ - typical prompt when logged in as ordinary user
  • # - typical prompt when logged in as root or superuser
  • ! - repeat specified command
  • !! - repeat previous command
  • ^^ - repeat previous command with substitution
  • & - run a program in background mode
  • [Tab][Tab] - prints a list of all available commands. This is just an example of autocomplete with no restriction on the first letter.
  • x[Tab][Tab] - prints a list of all available completions for a command, where the beginning is ``x''
  • [Alt][Ctrl][F1] - switch to the first virtual text console
  • [Alt][Ctrl][Fn] - switch to the nth virtual text console. Typically, there are six on a Linux PC system.
  • [Alt][Ctrl][F7] - switch to the first GUI console, if there is one running. If the graphical console freezes, one can switch to a nongraphical console, kill the process that is giving problems, and switch back to the graphical console using this shortcut.
  • [ArrowUp] - scroll through the command history (in bash)
  • [Shift][PageUp] - scroll terminal output up. This also works at the login prompt, so you can scroll through your boot messages.
  • [Shift][PageDown] - scroll terminal output down
  • [Ctrl][Alt][+] - switch to next X server resolution (if the server is set up for more than one resolution)
  • [Ctrl][Alt][-] - change to previous X server resolution
  • [Ctrl][Alt][BkSpc] - kill the current X server. Used when normal exit is not possible.
  • [Ctrl][Alt][Del] - shut down the system and reboot
  • [Ctrl]c - kill the current process
  • [Ctrl]d - logout from the current terminal
  • [Ctrl]s - stop transfer to current terminal
  • [Ctrl]q - resume transfer to current terminal. This should be tried if the terminal stops responding.
  • [Ctrl]z - send current process to the background
  • reset - restore a terminal to its default settings
  • [Leftmousebutton] - Hold down left mouse button and drag to highlight text. Releasing the button copies the region to the text buffer under X and (if gpm is installed) in console mode.
[Middlemousebutton] - Copies text from the text buffer and inserts it at the cursor location. With a two-button mouse, click on both buttons simultaneously. It is necessary for three-button emulation to be enabled, either under gpm or in XF86Config

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