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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.

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dumpkeys [options]

Print information about the keyboard driver's translation tables to standard output. Further information is available in the manual pages under keymaps(5).


-1, --separate-lines

Print one line for each modifier/keycode pair, and prefix plain to each unmodified keycode.

-ccharset, --charset=charset

Specify character set with which to interpret character code values. The default character set is iso-8859-1. The full list of valid character sets is available with the --help option.


Print compose key combinations only. Requires compose key support in the kernel.

-f, --full-table

Output in canonical, not short, form: for each key, print a row with modifier combinations divided into columns.


Print function-key string definitions only; do not print key bindings or string definitions.

-h, --help

Print help message and the version.

-i, --short-info

Print in short-info format, including information about acceptable keycode keywords in the keytable files; the number of actions that can be bound to a key; a list of the ranges of action codes (the values to the right of a key definition); and the number of function keys that the kernel supports.


Print key bindings only; do not print string definitions.

-l, --long-info

Print the same information as in --short-info, plus a list of the supported action symbols and their numeric values.

-n, --numeric

Print action code values in hexadecimal notation; do not attempt to convert them to symbolic notation.

-S num, --shape=num

Print using num to determine table shape. Values of num are:




Same as --full-table.


Same as --separate-lines.


One line for each keycode up to the first hole, then one line per modifier/keycode pair.

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