nnn/nnn.1

.Dd August 21, 2016
.Dt NNN 1
.Os
.Sh NAME
.Nm nnn
.Nd small file browser
.Sh SYNOPSIS
.Nm nnn
.Op Ar dir
.Sh DESCRIPTION
.Nm
is a simple and efficient file browser that gets out of your way
as much as possible.  It was initially implemented to be controlled
with a TV remote control.
.Pp
.Nm
defaults to the current directory if
.Ar dir
is not specified.  As an extra feature, if
.Ar dir
is a relative path,
.Nm
will not go back beyond the first component of the path using standard
navigation key presses.
.Pp
.Nm
supports both vi-like and emacs-like key bindings in the default
configuration.  The default key bindings are described below;
their functionality is described in more detail later.
.Pp
.Bl -tag -width "l, [Right], [Return] or C-mXXXX" -offset indent -compact
.It Ic k, [Up] or C-p
Move to previous entry.
.It Ic j, [Down] or C-n
Move to next entry.
.It Ic [Pgup] or C-u
Scroll up half a page.
.It Ic [Pgdown] or C-d
Scroll down half a page.
.It Ic [Home], ^ or C-a
Move to the first entry.
.It Ic [End], $ or C-e
Move to the last entry.
.It Ic l, [Right], [Return] or C-m
Open file or enter directory.
.It Ic h, C-h, [Left] or [Backspace]
Back up one directory level.
.It Ic / or &
Change filter (see below for more information).
.It Ic c
Change into the given directory.
.It Ic ~
Change to the HOME directory.
.It Ic \&.
Toggle hide .dot files.
.It Ic t
Toggle sort by time modified.
.It Ic C-l
Force a redraw.
.It Ic \&!
Spawn a shell in current directory.
.It Ic z
Run the system top utility.
.It Ic e
Open selected entry with the vi editor.
.It Ic p
Open selected entry with the less pager.
.It Ic q
Quit.
.El
.Pp
Backing up one directory level will set the cursor position at the
directory you came out of.
.Sh CONFIGURATION
.Nm
is configured by modifying
.Pa config.h
and recompiling the code.
.Pp
The file associations are specified by regexes
matching on the currently selected filename.  If a match is found the associated
program is executed with the filename passed in as the argument.  If no match
is found the program
.Xr less 1
is invoked.  This is useful for editing text files
as one can use the 'v' command in
.Xr less 1 to edit the file using the EDITOR environment variable.
.Pp
See the examples section below for more information.
.Sh FILTERS
Filters allow you to use regexes to display only the matched
entries in the current directory view.  This effectively allows
searching through the directory tree for a particular entry.
.Pp
Filters do not stack on top of each other.  They are applied anew
every time.
.Pp
To reset the filter you can input an empty filter expression.
.Pp
If
.Nm
is invoked as root the default filter will also match hidden
files.
.Sh ENVIRONMENT
The SHELL, EDITOR and PAGER environment variables take precedence
when dealing with the !, e and p commands respectively.
.Pp
\fBNNN_OPENER:\fR set to your desktop environment's default
mime opener to override all custom mime associations.
.br
Examples: xdg-open, gnome-open, gvfs-open.
.Pp
\fBNNN_FALLBACK_OPENER:\fR set to your desktop environment's default
mime opener to use as a fallback when no association is set for a file
type. Custom associations are listed in the EXAMPLES section below.
.Pp
\fBNNN_COPIER:\fR set to a clipboard copier script. For example, on Linux:
.Bd -literal
        #!/bin/sh

        echo -n $1 | xsel --clipboard --input
.Sh EXAMPLES
The following example shows one possible configuration for
file associations which is also the default if environment
variable NNN_OPENER is not set:
.Bd -literal
        struct assoc assocs[] = {
	        { "\\.(c|cpp|h|txt|log)$", "vim" },
	        { "\\.pdf$", "zathura" },
	        { "\\.sh$", "sh" },
        };
Plain text files are opened with vim.
.br
Any other file types are opened with the 'xdg-open' command.
.Ed
.Sh KNOWN ISSUES
If you are using urxvt you might have to set backspacekey to DEC.
.Sh AUTHORS
.An Lazaros Koromilas Aq Mt lostd@2f30.org ,
.An Dimitris Papastamos Aq Mt sin@2f30.org .
.Pp
** The current non-mainstream version is a modified one patched by Arun Prakash Jana <engineerarun@gmail.com>.
.br
More details: https://github.com/jarun/nnn