dumpkeys - dump keyboard translation tables
dumpkeys [ -hilfn1 -Sshape -ccharset --help --short-info --long-info
--numeric --full-table --separate-lines --shape=shape --funcs-only
--keys-only --compose-only --charset=charset ]
dumpkeys writes, to the standard output, the current contents of the
keyboard driver’s translation tables, in the format specified by
Using the various options, the format of the output can be controlled
and also other information from the kernel and the programs dumpkeys(1)
and loadkeys(1) can be obtained.
Prints the program’s version number and a short usage message to
the program’s standard error output and exits.
Prints some characteristics of the kernel’s keyboard driver. The
items shown are:
Keycode range supported by the kernel:
This tells what values can be used after the keycode
keyword in keymap files. See keymaps(5) for more
information and the syntax of these files.
Number of actions bindable to a key:
This tells how many different actions a single key can
output using various modifier keys. If the value is 16
for example, you can define up to 16 different actions to
a key combined with modifiers. When the value is 16, the
kernel probably knows about four modifier keys, which you
can press in different combinations with the key to
access all the bound actions.
Ranges of action codes supported by the kernel:
This item contains a list of action code ranges in
hexadecimal notation. These are the values that can be
used in the right hand side of a key definition, ie. the
vv’s in a line
keycode xx = vv vv vv vv
(see keymaps(5) for more information about the format of
key definition lines). dumpkeys(1) and loadkeys(1)
support a symbolic notation, which is preferable to the
numeric one, as the action codes may vary from kernel to
kernel while the symbolic names usually remain the same.
However, the list of action code ranges can be used to
determine, if the kernel actually supports all the
symbols loadkeys(1) knows, or are there maybe some
actions supported by the kernel that have no symbolic
name in your loadkeys(1) program. To see this, you
compare the range list with the action symbol list, see
option --long-info below.
Number of function keys supported by kernel:
This tells the number of action codes that can be used to
output strings of characters. These action codes are
traditionally bound to the various function and editing
keys of the keyboard and are defined to send standard
escape sequences. However, you can redefine these to send
common command lines, email addresses or whatever you
like. Especially if the number of this item is greater
than the number of function and editing keys in your
keyboard, you may have some "spare" action codes that you
can bind to AltGr-letter combinations, for example, to
send some useful strings. See loadkeys(1) for more
You can see you current function key definitions with the
This option instructs dumpkeys to print a long information
listing. The output is the same as with the --short-info
appended with the list of action symbols supported by
loadkeys(1) and dumpkeys(1), along with the symbols’ numeric
This option causes dumpkeys to by-pass the conversion of action
code values to symbolic notation and to print the in hexadecimal
This makes dumpkeys skip all the short-hand heuristics (see
keymaps(5)) and output the key bindings in the canonical form.
First a keymaps line describing the currently defined modifier
combinations is printed. Then for each key a row with a column
for each modifier combination is printed. For example, if the
current keymap in use uses seven modifiers, every row will have
seven action code columns. This format can be useful for example
to programs that post-process the output of dumpkeys.
This forces dumpkeys to write one line per (modifier,keycode)
pair. It prefixes the word plain for plain keycodes.
Tells dumpkeys to use the specified table shape. Allowed shapes
are 0: default shape (same as no -S); 1: same as option
--full-table; 2: same as option --separate-lines; 3: display one
line per keycode (as in shape 1),
until first hole is met, then use one line per
(modifier,keycode) pair (as in shape 2).
When this option is given, dumpkeys prints only the function key
string definitions. Normally dumpkeys prints both the key
bindings and the string definitions.
When this option is given, dumpkeys prints only the key
bindings. Normally dumpkeys prints both the key bindings and the
When this option is given, dumpkeys prints only the compose key
combinations. This option is available only if your kernel has
compose key support.
This instructs dumpkeys to interpret character code values
according to the specified character set. This affects only the
translation of character code values to symbolic names. Valid
values for charset are listed by the --help option. If no
charset is specified, iso-8859-1 is used as a default. This
option produces an output line ‘charset "iso-8859-X"’, telling
loadkeys how to interpret the keymap. (For example, "division"
is 0xf7 in iso-8859-1 but 0xba in iso-8859-8).
/usr/share/keymaps/ recommended directory for keymap files
loadkeys(1), keymaps(5), setkeycodes(8).