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Linux in a Nutshell

This directory of Linux commands is from Linux in a Nutshell, 5th Edition.

Click on any of the 687 commands below to get a description and list of available options. All links in the command summaries point to the online version of the book on Safari Bookshelf.

Buy it now, or read it online on Safari Bookshelf.


showkey [options]

Print keycodes, scancodes, or ASCII codes of keys pressed on the keyboard. The default is to show keycodes. In keycode and scancode mode, the program terminates 10 seconds after the last key is pressed. In ASCII mode, press Ctrl-D to exit. This command may not function properly under the X Window System, which also reads from the console device.


-a, --ascii

Print the ASCII character, decimal, octal, and hexadecimal values of keys pressed.

-h, --help

Print version number and help message, then exit.

-k, --keycodes

Print keycodes associated with key-press events. This is the default mode.

-s, --scancodes

Print the keyboard scancodes associated with key-press events.

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