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Programas para customizar o meu entorno de traballo nos meus equipos persoais
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nnn.1 (20439B)


      1 .Dd Aug 27, 2023
      2 .Dt NNN 1
      3 .Os
      4 .Sh NAME
      5 .Nm nnn
      6 .Nd The unorthodox terminal file manager.
      7 .Sh SYNOPSIS
      8 .Nm
      9 .Op Ar -aAcCdDeEfgHJKnQrRSuUVxh
     10 .Op Ar -b key
     11 .Op Ar -F val
     12 .Op Ar -l val
     13 .Op Ar -p file
     14 .Op Ar -P key
     15 .Op Ar -s name
     16 .Op Ar -t secs
     17 .Op Ar -T key
     18 .Op Ar PATH
     19 .Sh DESCRIPTION
     20 .Nm
     21 .Pq Nnn's Not Noice
     22 is a performance-optimized, feature-packed fork of noice
     23 .Em http://git.2f30.org/noice/
     24 with seamless desktop integration, simplified navigation,
     25 .Em type-to-nav
     26 mode with dir auto-enter, disk usage analyzer mode, bookmarks,
     27 contexts, application launcher, familiar navigation shortcuts,
     28 subshell spawning and much more. It remains a simple and
     29 efficient file manager that stays out of your way.
     30 .Pp
     31 .Nm
     32 opens the current working directory if
     33 .Ar PATH
     34 is not specified. If
     35 .Ar PATH
     36 is specified and it exists,
     37 .Nm
     38 will open it. If the
     39 .Ar PATH
     40 doesn't exist and ends with a \fB/\fR,
     41 .Nm
     42 will attempt to create the directory tree and open it. Otherwise,
     43 .Ar PATH
     44 is considered a path to a regular file and
     45 .Nm
     46 attempts to create the complete directory tree to the file, open
     47 the parent directory and prompt to create the new file in it with
     48 the base filename.
     49 .Sh KEYBINDS
     50 .Pp
     51 Press
     52 .Ql \&?
     53 in
     54 .Nm
     55 to see the list of keybinds.
     56 .Sh OPTIONS
     57 .Pp
     58 .Nm
     59 supports the following options:
     60 .Pp
     61 .Fl a
     62         auto-setup temporary \fBNNN_FIFO\fR (described in \fIENVIRONMENT\fR section)
     63 .Pp
     64 .Fl A
     65         disable directory auto-enter on unique filter match
     66 .Pp
     67 .Fl "b key"
     68         specify bookmark key to open
     69 .Pp
     70 .Fl B
     71         use bsdtar for archives (default: atool)
     72 .Pp
     73 .Fl c
     74         indicates that the opener is a cli-only opener (overrides -e)
     75 .Pp
     76 .Fl C
     77         8-color scheme - color directories by context, disable file colors
     78 .Pp
     79 .Fl d
     80         detail mode
     81 .Pp
     82 .Fl D
     83         show directories in context color with \fBNNN_FCOLORS\fR set
     84 .Pp
     85 .Fl e
     86         open text files in $VISUAL (else $EDITOR, fallback vi) [preferably CLI]
     87 .Pp
     88 .Fl E
     89         use $EDITOR for internal undetached edits
     90 .Pp
     91 .Fl f
     92         use readline history file
     93 .Pp
     94 .Fl "F val"
     95         fifo notification mode
     96         0: notify as previewer, 1: notify as explorer
     97 .Pp
     98 .Fl g
     99         use regex filters instead of substring match
    100 .Pp
    101 .Fl H
    102         show hidden files
    103 .Pp
    104 .Fl i
    105         show current file information in info bar (may be slow)
    106 .Pp
    107 .Fl J
    108         disable auto-advance on selection
    109         (eg. selecting an entry will no longer move cursor to the next entry)
    110 .Pp
    111 .Fl K
    112         test for keybind collision and exit
    113 .Pp
    114 .Fl "l val"
    115         number of lines to move per mouse wheel scroll
    116 .Pp
    117 .Fl n
    118         start in type-to-nav mode
    119 .Pp
    120 .Fl o
    121         open files only on Enter key
    122 .Pp
    123 .Fl "p file"
    124         copy (or \fIpick\fR) selection to file, or stdout if file='-'
    125 .Pp
    126 .Fl "P key"
    127         specify plugin key to run
    128 .Pp
    129 .Fl Q
    130         disable confirmation on quit with multiple contexts active
    131 .Pp
    132 .Fl r
    133         show cp, mv progress
    134         (Linux-only, needs \fIadvcpmv\fR; '^T' shows the progress on BSD/macOS)
    135 .Pp
    136 .Fl R
    137         disable rollover at edges (eg. pressing \fIdown\fR while on the last
    138         entry will no longer move cursor to the first entry and vice\-versa)
    139 .Pp
    140 .Fl "s name"
    141         load a session by name
    142 .Pp
    143 .Fl S
    144         persistent session
    145 .Pp
    146 .Fl "t secs"
    147         idle timeout in seconds to lock terminal
    148 .Pp
    149 .Fl "T key"
    150         sort order
    151         keys: 'a'u / 'd'u / 'e'xtension / 'r'everse / 's'ize / 't'ime / 'v'ersion
    152         capitalize to reverse (except 'r')
    153 .Pp
    154 .Fl u
    155         use selection if available, don't prompt to choose between selection and hovered entry
    156 .Pp
    157 .Fl U
    158         show user and group names in status bar
    159 .Pp
    160 .Fl V
    161         show version and exit
    162 .Pp
    163 .Fl x
    164         show notifications on selection cp, mv, rm completion (requires \fI.ntfy\fR plugin)
    165         copy path to system clipboard on selection (requires \fI.cbcp\fR plugin)
    166         show xterm title (if non-picker mode)
    167 .Pp
    168 .Fl h
    169         show program help and exit
    170 .Sh CONFIGURATION
    171 There is no configuration file. Associated files are at
    172 .Pp
    173 .Pa ${XDG_CONFIG_HOME:-$HOME/.config}/nnn/
    174 .Pp
    175 Configuration is done using a few optional (set if you need) environment
    176 variables. See ENVIRONMENT section.
    177 .Pp
    178 .Nm
    179 uses \fIxdg-open\fR (on Linux), \fIopen(1)\fR (on macOS), \fIcygstart\fR on
    180 (Cygwin) and \fIopen\fR on (Haiku) as the desktop opener. It's also possible
    181 to specify a custom opener. See ENVIRONMENT section.
    182 .Sh CONTEXTS
    183 Open multiple locations with 4 contexts. The status is shown in the top left
    184 corner:
    185 .Pp
    186 - the current context is in reverse video
    187 .br
    188 - other active contexts are underlined
    189 .br
    190 - rest are inactive
    191 .Pp
    192 A new context copies the state of the previous context. Each context can have
    193 its own color. See ENVIRONMENT section.
    194 .Sh SESSIONS
    195 Sessions are a way to save and restore states of work. A session stores the
    196 settings and contexts. Sessions can be loaded at runtime or with a program
    197 option.
    198 .Pp
    199 - When a session is loaded at runtime, the last working state is saved
    200 automatically to a dedicated "auto session" session file. Session option
    201 \fIrestore\fR would restore the "auto session".
    202 .br
    203 - The persistent session option is global. If it is used, the last active session
    204 will be updated with the final state at program quit.
    205 .br
    206 - The "auto session" is used in persistent session mode if no session is active.
    207 .br
    208 - Listing input stream and opening a bookmark by key have a higher priority to
    209 session options (-s/-S).
    210 .Pp
    211 All the session files are located by session name in the directory
    212 .Pp
    213 \fB${XDG_CONFIG_HOME:-$HOME/.config}/nnn/sessions\fR
    214 .Pp
    215 "@" is the "auto session" file.
    216 .Sh FILTERS
    217 Filters are strings (or regex patterns) to find matching entries in the current
    218 directory instantly (\fIsearch-as-you-type\fR). Matches are case-insensitive by
    219 default. The last filter in each context is persisted at runtime or in saved
    220 sessions.
    221 .br
    222 When there's a unique match and it's a directory,
    223 .Nm
    224 auto enters the directory. Use the relevant program option to disable this.
    225 .Pp
    226 Special keys at filter prompt:
    227 .Bd -literal
    228 -------- + ---------------------------------------
    229   Key    |                Function
    230 -------- + ---------------------------------------
    231  ^char   | Usual keybind functionality
    232  Esc     | Exit filter prompt but skip dir refresh
    233  Alt+Esc | Unfilter, quit context
    234 -------- + ---------------------------------------
    235 .Ed
    236 .Pp
    237 Special keys at \fBempty filter prompt\fR:
    238 .Bd -literal
    239 ------ + ---------------------------------------
    240   Key  |                Function
    241 ------ + ---------------------------------------
    242    ?   | Show help and config screen
    243    /   | Toggle between string and regex
    244    :   | Toggle case-sensitivity
    245   ^L   | Clear filter (\fIif prompt is non-empty\fR)
    246        | OR apply last filter
    247   Bksp | Stay at filter prompt and refresh dir
    248   Del  | Stay at filter prompt and refresh dir
    249 ------ + ---------------------------------------
    250 .Ed
    251 .Pp
    252 Common regex use cases:
    253 .Pp
    254 (1) To list all matches starting with the filter expression,
    255     start the expression with a '^' (caret) symbol.
    256 .br
    257 (2) Type '\\.mkv' to list all MKV files.
    258 .br
    259 (3) Use '.*' to match any character (\fIsort of\fR fuzzy search).
    260 .br
    261 (4) Exclude filenames having 'nnn' (compiled with PCRE lib): '^(?!nnn)'
    262 .Pp
    263 In the \fBtype-to-nav\fR mode directories are opened in filter
    264 mode, allowing continuous navigation.
    265 .Pp
    266 Additional special keys at \fBempty filter prompt\fR
    267 in \fBtype-to-nav\fR mode:
    268 .Bd -literal
    269 ------ + ------------------------
    270   Key  |         Function
    271 ------ + ------------------------
    272    '   | Go to first non-dir file
    273    +   | Toggle file selection
    274    ,   | Mark CWD
    275    -   | Go to last visited dir
    276    .   | Show hidden files
    277    ;   | Run a plugin by its key
    278    =   | Launch a GUI application
    279    >   | Export file list
    280    @   | Visit start dir
    281    ]   | Show command prompt
    282    `   | Visit /
    283    ~   | Go HOME
    284 ------ + ------------------------
    285 .Ed
    286 .Sh SELECTION
    287 .Nm
    288 allows file selection across directories and contexts!
    289 .Pp
    290 There are 3 groups of keybinds to add files to selection:
    291 .Pp
    292 (1) hovered file selection toggle
    293     - deselects if '+' is visible before the entry, else adds to selection
    294 .br
    295 (2) add a range of files to selection
    296     - repeat the range key on the same entry twice to clear selection completely
    297 .br
    298 (3) add all files in the current directory to selection
    299 .Pp
    300 A selection can be edited, copied, moved, removed, archived or linked.
    301 .Pp
    302 Absolute paths of the selected files are copied to \fB.selection\fR file in
    303 the config directory. The selection file is shared between multiple program
    304 instances. Selection from multiple instances are not merged. The last instance
    305 writing to the file overwrites earlier contents. If you have 2 instances of
    306 .Nm
    307 \fIopen\fR in 2 panes of a terminal multiplexer, you can select in one pane and
    308 use the selection in the other pane. The selection gets cleared in the
    309 .Nm
    310 instance where the selection was made on mv/rm (but not on cp).
    311 .Pp
    312 .Nm
    313 clears the selection after a successful operation with the selection. Plugins
    314 are allowed to define the behaviour individually.
    315 .Pp
    316 To edit the selection use the _edit selection_ key. Editing doesn't end the
    317 selection mode. You can add more files to the selection and edit the list
    318 again. If no file is selected in the current session, this option attempts
    319 to list the selection file.
    320 .Pp
    321 .Nm
    322 can show the total size of non-filtered selected files listed in a
    323 directory. For directories, only the size of the directory is added by
    324 default. To add the size of the contents of a directory, switch to du mode.
    325 .Sh FIND AND LIST
    326 There are two ways to search and list:
    327 .Pp
    328 - feed a list of file paths as input
    329 .br
    330 - search using a plugin (e.g. \fIfinder\fR) and list the results
    331 .Pp
    332 File paths must be NUL-separated ('\\0'). Paths and can be relative to the
    333 current directory or absolute. Invalid paths in the input are ignored. Input
    334 processing limit is 16,384 paths or 64 MiB (max_paths x max_path_len) of data.
    335 .Pp
    336 To list the input stream, start
    337 .Nm
    338 by writing to its standard input. E.g., to list files in current
    339 directory larger than
    340 1M:
    341 .Bd -literal
    342     find -maxdepth 1 -size +1M -print0 | nnn
    343 .Ed
    344 .Pp
    345 or redirect a list from a file:
    346 .Bd -literal
    347     nnn < files.txt
    348 .Ed
    349 .Pp
    350 Handy bash/zsh shell function to list files by mime-type in current directory:
    351 .Bd -literal
    352     # to show video files, run: list video
    353 
    354     list ()
    355     {
    356         find . -maxdepth 1 | file -if- | grep "$1" | awk -F: '{printf "%s\0", $1}' | nnn
    357     }
    358 .Ed
    359 .Pp
    360 A temporary directory will be created containing symlinks to the given
    361 paths. Any action performed on these symlinks will be performed only on their
    362 targets, after which they might become invalid.
    363 .Pp
    364 Right arrow or 'l' on a symlink in the listing dir takes to the target
    365 file. Press '-' to return to the listing dir. Press 'Enter' to open the symlink.
    366 .Pp
    367 Listing input stream can be scripted. It can be extended to pick (option -p)
    368 selected entries from the listed results.
    369 .Sh BOOKMARKS
    370 There are 2 ways (can be used together) to manage bookmarks.
    371 .Pp
    372 (1) Bookmark keys: See \fBNNN_BMS\fR under \fIENVIORNMENT\fR section on how to set
    373     bookmark keys.
    374 
    375     The select bookmark key \fIb\fR lists all the bookmark keys set in \fBNNN_BMS\fR
    376     in the bookmarks prompt.
    377 .Pp
    378 (2) Symlinked bookmarks: A symlinked bookmark to the current directory can
    379     be created with the \fIB\fR key (or manually under ~/.config/nnn/bookmarks).
    380 
    381     Pressing 'Enter' at the bookmarks prompt takes to this directory.
    382     If \fBNNN_BMS\fR is not set, the select bookmark key directly opens it.
    383 .Pp
    384 On entering a bookmark, the directory where the select bookmark key was
    385 pressed is set as the previous directory. Press '-' to return to it.
    386 .Pp
    387 .Sh UNITS
    388 The minimum file size unit is byte (B). The rest are K, M, G, T, P, E, Z, Y
    389 (powers of 1024), same as the default units in \fIls\fR.
    390 .Sh ENVIRONMENT
    391 The SHELL, VISUAL (else EDITOR) and PAGER environment variables are
    392 used. A single combination of arguments is supported for SHELL and PAGER.
    393 .Pp
    394 \fBNNN_OPTS:\fR binary options to
    395 .Nm
    396 .Bd -literal
    397     export NNN_OPTS="cEnrx"
    398 .Ed
    399 .Pp
    400 \fBNNN_OPENER:\fR specify a custom file opener.
    401 .Bd -literal
    402     export NNN_OPENER=nuke
    403 
    404     NOTE: 'nuke' is a file opener available in the plugin repository.
    405 .Ed
    406 .Pp
    407 \fBNNN_BMS:\fR bookmark string as \fIkey_char:location\fR pairs
    408 separated by \fI;\fR:
    409 .Bd -literal
    410     export NNN_BMS="d:$HOME/Docs;u:/home/user/Cam Uploads;D:$HOME/Downloads/"
    411 .Ed
    412 .Pp
    413 These bookmarks are listed in the help and config screen (key ?).
    414 .Pp
    415 \fBNNN_PLUG:\fR directly executable plugins as \fIkey_char:plugin\fR pairs
    416 separated by \fI;\fR:
    417 .Bd -literal
    418     export NNN_PLUG='f:finder;o:fzopen;p:mocplay;d:diffs;t:nmount;v:imgview'
    419 
    420     NOTES:
    421     1. To run a plugin directly, press \fI;\fR followed by the key.
    422     2. Alternatively, combine with \fIAlt\fR (i.e. \fIAlt+key\fR).
    423     3. To skip directory refresh after running a plugin, prefix with \fB-\fR.
    424 
    425     export NNN_PLUG='p:-plugin'
    426 .Ed
    427 .Pp
    428     To assign keys to arbitrary non-background cli commands and invoke like
    429     plugins, add \fB!\fR before the command.
    430 .Bd -literal
    431     export NNN_PLUG='x:!chmod +x "$nnn";g:!git log;s:!smplayer "$nnn"'
    432 
    433     To pick and run an unassigned plugin, press \fBEnter\fR at the plugin prompt.
    434     To run a plugin at startup, use the option `-P` followed by the plugin key.
    435 
    436     NOTES:
    437     1. Place $nnn (or exported variables) in double quotes (\fB"$nnn"\fR)
    438     2. Use single quotes for $NNN_PLUG so "$nnn" is not interpreted
    439     3. (Again) add \fB!\fR before the command
    440     4. To disable directory refresh after running a \fIcommand as plugin\fR,
    441        prefix with \fB-!\fR
    442     5. To skip user confirmation after command execution, suffix with \fB*\fR
    443        Note: Do not use \fB*\fR with programs those run and exit e.g. cat
    444 
    445         export NNN_PLUG='y:-!sync*'
    446 
    447     6. To run a \fIGUI app as plugin\fR, add a \fB&\fR after \fB!\fR.
    448 
    449         export NNN_PLUG='m:-!&mousepad "$nnn"'
    450 
    451     7. To show the output of run-and-exit commands which do not need user input,
    452        add \fB|\fR (pipe) after \fB!\fR
    453        Note: This option is incompatible with \fB&\fR (terminal output is masked
    454        for GUI programs) and ignores \fB*\fR (output is already paged for user).
    455 
    456         export NNN_PLUG='m:-!|mediainfo "$nnn";t:-!|tree -ps;l:-!|ls -lah --group-directories-first'
    457 
    458     EXAMPLES:
    459     ------------------------------------ + -------------------------------------------------
    460                 Key:Command              |                   Description
    461     ------------------------------------ + -------------------------------------------------
    462     c:!convert "$nnn" png:- | xclip      | Copy image to clipboard
    463        -sel clipboard -t image/png*      |
    464     C:!cp -rv "$nnn" "$nnn".cp*          | Create a copy of the hovered file
    465     e:-!sudo -E vim "$nnn"*              | Edit file as root in vim
    466     g:-!git diff                         | Show git diff
    467     h:-!hx "$nnn"*                       | Open hovered file in hx hex editor
    468     k:-!fuser -kiv "$nnn"*               | Interactively kill process(es) using hovered file
    469     l:-!git log                          | Show git log
    470     n:-!vi /home/user/Dropbox/dir/note*  | Take quick notes in a synced file/dir of notes
    471     p:-!less -iR "$nnn"*                 | Page through hovered file in less
    472     s:-!&smplayer -minigui "$nnn"        | Play hovered media file, even unfinished download
    473     x:!chmod +x "$nnn"                   | Make the hovered file executable
    474     y:-!sync*                            | Flush cached writes
    475     ------------------------------------ + -------------------------------------------------
    476 
    477     Online docs: https://github.com/jarun/nnn/tree/master/plugins
    478 .Ed
    479 .Pp
    480 \fBNNN_ORDER:\fR directory-specific sort key.
    481 .Bd -literal
    482     export NNN_ORDER='t:/home/user/Downloads;S:/tmp'
    483 
    484     NOTE: Sort keys can be a/d/e/r/s/t/v (see program option -T).
    485           Capitalize to reverse (except 'r').
    486           Path must be absolute.
    487 
    488           Timestamps for entries modified/created within 5 minutes are shown in reverse.
    489 .Ed
    490 .Pp
    491 \fBNNN_COLORS:\fR string of color numbers for each context, e.g.:
    492 .Bd -literal
    493     # 8 color numbers:
    494     # 0-black, 1-red, 2-green, 3-yellow, 4-blue (default), 5-magenta, 6-cyan, 7-white
    495     export NNN_COLORS='1234'
    496 
    497     # xterm 256 color numbers (converted to hex, 2 symbols per context):
    498     # see https://user-images.githubusercontent.com/1482942/93023823-46a6ba80-f5e1-11ea-9ea3-6a3c757704f4.png
    499     export NNN_COLORS='#0a1b2c3d'
    500 
    501     # both (256 followed by 8 as fallback, separated by ';')
    502     export NNN_COLORS='#0a1b2c3d;1234'
    503 
    504     NOTE: If only 256 colors are specified and the terminal doesn't support, default is used.
    505 .Ed
    506 .Pp
    507 \fBNNN_FCOLORS:\fR specify file-type specific colors:
    508 .Bd -literal
    509     export NNN_FCOLORS='c1e2272e006033f7c6d6abc4'
    510 
    511     Specify file-specific colors in xterm 256 color hex numbers (2 symbols per color).
    512     Order is strict, use 00 to omit/use default terminal color. Defaults:
    513 
    514     ------------------------- + --- + -------------
    515               Order           | Hex |    Color
    516     ------------------------- + --- + -------------
    517     Block device              | c1  | DarkSeaGreen1
    518     Char device               | e2  | Yellow1
    519     Directory                 | 27  | DeepSkyBlue1
    520     Executable                | 2e  | Green1
    521     Regular                   | 00  | Normal
    522     Hard link                 | 60  | Plum4
    523     Symbolic link             | 33  | Cyan1
    524     Missing OR file details   | f7  | Grey62
    525     Orphaned symbolic link    | c6  | DeepPink1
    526     FIFO                      | d6  | Orange1
    527     Socket                    | ab  | MediumOrchid1
    528     Unknown OR 0B regular/exe | c4  | Red1
    529     ------------------------- + --- + -------------
    530 
    531     If the terminal supports xterm 256 colors or more, file-specific colors will be rendered.
    532     To force the 8-color scheme use option -C.
    533     If xterm 256 colors aren't supported, 8-color scheme will be used.
    534 .Ed
    535 .Pp
    536 \fBNNN_ARCHIVE:\fR archive extensions to be handled silently (default: bzip2, (g)zip, tar).
    537 .Bd -literal
    538     export NNN_ARCHIVE="\\\\.(7z|bz2|gz|tar|tgz|zip)$"
    539 
    540     NOTE: Non-default formats may require a third-party utility.
    541 .Ed
    542 .Pp
    543 \fBNNN_ARCHMNT:\fR optional archive mounter utility (default: archivemount).
    544 .Bd -literal
    545     export NNN_ARCHIVE='fuse-archive'
    546 .Ed
    547 .Pp
    548 \fBNNN_SSHFS:\fR specify custom sshfs command with options:
    549 .Bd -literal
    550     export NNN_SSHFS='sshfs -o reconnect,idmap=user,cache_timeout=3600'
    551 
    552     NOTE: The options must be comma-separated without any space between them.
    553 .Ed
    554 .Pp
    555 \fBNNN_RCLONE:\fR pass additional options to rclone command:
    556 .Bd -literal
    557     export NNN_RCLONE='rclone mount --read-only --no-checksum'
    558 
    559     NOTE: The options must be preceded by "rclone" and max 5 flags are supported.
    560 .Ed
    561 .Pp
    562 \fBNNN_TRASH:\fR trash (instead of \fIrm -rf\fR) files to desktop Trash.
    563 .Bd -literal
    564     export NNN_TRASH=n
    565     # n=1: trash-cli, n=2: gio trash
    566 .Ed
    567 .Pp
    568 \fBNNN_SEL:\fR absolute path to custom selection file.
    569 .Bd -literal
    570     export NNN_SEL='/tmp/.sel'
    571 .Ed
    572 .Pp
    573 \fBNNN_FIFO:\fR path of a named pipe to write the hovered file path:
    574 .Bd -literal
    575     export NNN_FIFO='/tmp/nnn.fifo'
    576 
    577     NOTES:
    578     1. Overridden by a temporary path with -a option.
    579     2. If the FIFO file doesn't exist it will be created,
    580        but not removed (unless it is generated by -a option).
    581 
    582     Online docs: https://github.com/jarun/nnn/wiki/Live-previews
    583 .Ed
    584 .Pp
    585 \fBNNN_LOCKER:\fR terminal locker program.
    586 .Bd -literal
    587     export NNN_LOCKER='bmon -p wlp1s0'
    588     export NNN_LOCKER='cmatrix'
    589 .Ed
    590 .Pp
    591 \fBNNN_TMPFILE:\fR \fIalways\fR cd on quit and write the command in the file specified.
    592 .Bd -literal
    593     export NNN_TMPFILE='/tmp/.lastd'
    594 .Ed
    595 .Pp
    596 \fBNNN_HELP:\fR run a program and show the output on top of the program help page.
    597 .Bd -literal
    598     export NNN_HELP='fortune'
    599 .Ed
    600 .Pp
    601 \fBNNN_MCLICK:\fR key emulated by a middle mouse click.
    602 .Bd -literal
    603     export NNN_MCLICK='^R'
    604 
    605     NOTE: Only the first character is considered if not a \fICtrl+key\fR combo.
    606 .Ed
    607 .Pp
    608 \fBnnn:\fR this is a special variable.
    609 .Bd -literal
    610     Set to the hovered file name before starting the command prompt or spawning a shell.
    611 .Ed
    612 .Pp
    613 \fBNO_COLOR:\fR disable ANSI color output (overridden by \fBNNN_COLORS\fR).
    614 .Sh AUTHORS
    615 .An Arun Prakash Jana Aq Mt engineerarun@gmail.com ,
    616 .An Lazaros Koromilas Aq Mt lostd@2f30.org ,
    617 .An Dimitris Papastamos Aq Mt sin@2f30.org .
    618 .Sh HOME
    619 .Em https://github.com/jarun/nnn