(nano.info)Nanorc Files

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7 Nanorc Files
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The nanorc files contain the default settings for ‘nano’.  They should
be in Unix format, not in DOS or Mac format.  During startup, ‘nano’
will first read the system-wide settings, from /etc/nanorc (the exact
path might be different), and then the user-specific settings, either
from ‘~/.nanorc’ or from ‘$XDG_CONFIG_HOME/nano/nanorc’ or from
‘.config/nano/nanorc’, whichever exists first.

   A nanorc file accepts a series of "set" and "unset" commands, which
can be used to configure ‘nano’ on startup without using command-line
options.  Additionally, there are some commands to define syntax
highlighting and to rebind keys — Note: Syntax Highlighting and Note:
Rebinding Keys.  ‘nano’ will read one command per line.

   Options in nanorc files take precedence over ‘nano’’s defaults, and
command-line options override nanorc settings.  Also, options that do
not take an argument are unset by default.  So using the ‘unset’ command
is only needed when wanting to override a setting of the system’s nanorc
file in your own nanorc.  Options that take an argument cannot be unset.

   Quotes inside string parameters don’t have to be escaped with
backslashes.  The last double quote in the string will be treated as its
end.  For example, for the ‘brackets’ option, ""')>]}" will match ‘"’,
‘'’, ‘)’, ‘>’, ‘]’, and ‘}’.

Settings

Syntax Highlighting

Rebinding Keys