-?     Same as -h (--help).

-A (--smarthome)
       Make  the  Home  key  smarter.   When  Home  is pressed anywhere but at the very beginning of non-
       whitespace characters on a line, the cursor will  jump  to  that  beginning  (either  forwards  or
       backwards).   If the cursor is already at that position, it will jump to the true beginning of the
       line.

-B (--backup)
       When saving a file, back up the previous version of it to the current filename suffixed with a ~.

-C dir (--backupdir=dir)
       Set the directory where nano puts unique backup files if file backups are enabled.

-D (--boldtext)
       Use bold text instead of reverse video text.

-E (--tabstospaces)
       Convert typed tabs to spaces.

-F (--multibuffer)
       Enable multiple file buffers, if available.

-H (--historylog)
       Log search and replace strings to ~/.nano_history, so they can be retrieved in later sessions,  if
       nanorc support is available.

-I (--ignorercfiles)
       Don't look at SYSCONFDIR/nanorc or ~/.nanorc, if nanorc support is available.

-K (--rebindkeypad)
       Interpret  the  numeric  keypad  keys so that they all work properly.  You should only need to use
       this option if they don't, as mouse support won't work properly with this option enabled.

-L (--nonewlines)
       Don't add newlines to the ends of files.

-N (--noconvert)
       Disable automatic conversion of files from DOS/Mac format.

-O (--morespace)
       Use the blank line below the titlebar as extra editing space.

-Q str (--quotestr=str)
       Set the quoting string for justifying.  The default is "^([ \t]*[#:>\|}])+"  if  extended  regular
       expression support is available, or "> " otherwise.  Note that \t stands for a Tab.

-R (--restricted)
       Restricted  mode:  don't  read  or  write  to any file not specified on the command line; read any
       nanorc files; allow suspending; allow a file to be appended to, prepended to,  or  saved  under  a
       different  name  if it already has one; or use backup files or spell checking.  Also accessible by
       invoking nano with any name beginning with 'r' (e.g.  "rnano").

-S (--smooth)
       Enable smooth scrolling.  Text will scroll  line-by-line,  instead  of  the  usual  chunk-by-chunk
       behavior.

-T cols (--tabsize=cols)
       Set  the  size  (width)  of a tab to cols columns.  The value of cols must be greater than 0.  The
       default value is 8.

-U (--quickblank)
       Do quick statusbar blanking.  Statusbar messages will disappear after 1 keystroke instead  of  25.
       Note that -c overrides this.

-V (--version)
       Show the current version number and exit.

-W (--wordbounds)
       Detect word boundaries more accurately by treating punctuation characters as part of a word.

-Y str (--syntax=str)
       Specify a specific syntax highlighting from the nanorc to use, if available.

-c (--const)
       Constantly show the cursor position.  Note that this overrides -U.

-d (--rebinddelete)
       Interpret  the Delete key differently so that both Backspace and Delete work properly.  You should
       only need to use this option if Backspace acts like Delete on your system.

-h (--help)
       Show a summary of command line options and exit.

-i (--autoindent)
       Indent new lines to the previous line's indentation.  Useful when editing source code.

-k (--cut)
       Enable cut from cursor to end of line.

-l (--nofollow)
       If the file being edited is a symbolic link, replace the link with a new file instead of following
       it.  Good for editing files in /tmp, perhaps?

-m (--mouse)
       Enable  mouse  support,  if  available for your system.  When enabled, mouse clicks can be used to
       place the cursor, set the mark (with a double click), and execute shortcuts.  The mouse will  work
       in the X Window System, and on the console when gpm is running.

-o dir (--operatingdir=dir)
       Set operating directory.  Makes nano set up something similar to a chroot.

-p (--preserve)
       Preserve the XON and XOFF sequences (^Q and ^S) so they will be caught by the terminal.

-q (--quiet)
       Do  not  report  errors  in  the  nanorc file and ask them to be acknowledged by pressing Enter at
       startup.

-r cols (--fill=cols)
       Wrap lines at column cols.  If this value is 0 or less, wrapping will occur at the  width  of  the
       screen  less  cols  columns, allowing the wrap point to vary along with the width of the screen if
       the screen is resized.  The default value is -8.

-s prog (--speller=prog)
       Enable alternative spell checker command.

-t (--tempfile)
       Always save changed buffer without prompting.  Same as Pico's -t option.

-u (--undo)
       Enable experimental generic-purpose undo code.  By default, the undo and redo shortcuts are Meta-U
       and Meta-E, respectively.

-v (--view)
       View file (read only) mode.

-w (--nowrap)
       Disable wrapping of long lines.

-x (--nohelp)
       Disable help screen at bottom of editor.

-z (--suspend)
       Enable suspend ability.

-a, -b, -e, -f, -g, -j
       Ignored, for compatibility with Pico.