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.TH LNAV "1" "August 2022"
.SH NAME
lnav \- ncurses-based log file viewer
.SH SYNOPSIS
.B lnav 
[\-hVsar] [logfile1 logfile2 ...]
.SH DESCRIPTION
The log file navigator, lnav, is an enhanced log file viewer that
takes advantage of any semantic information that can be gleaned from
the files being viewed, such as timestamps and log levels.  Using this
extra semantic information, lnav can do things like interleaving
messages from different files, generate histograms of messages over
time, and providing hotkeys for navigating through the file.  It is
hoped that these features will allow the user to quickly and
efficiently zero in on problems.
.SH KEY BINDINGS
.TP
?
View/leave the online help text.
.TP
q
Quit the program.
.SH OPTIONS
.TP
\fB\-h\fR
Print help and exit
.TP
\fB\-H\fR
Display the internal help text.
.TP
\fB\-n\fR
Run without the curses UI.  (headless mode)
.TP
\fB\-c\fR cmd
Execute a command after the files have been loaded.
.TP
\fB\-f\fR path
Execute the commands in the given file.
.TP
\fB\-I\fR path
Add the given configuration directory to the search path.
.TP
\fB\-n\fR
Do not open the default syslog file if no files are given.
.TP
\fB\-q\fR
Quiet mode.  Do not print the log messages after executing all of the commands.
.TP
\fB\-i\fR
Install the given format files in the $HOME/.lnav/formats/installed directory
and exit.
.TP
\fB\-u\fR
Update formats installed from git repositories.
.TP
\fB\-C\fR
Check the configuration and exit.  The log format files will be loaded and
checked.  Any files given on the command-line will be loaded checked to make
sure they match a log format.
.TP
\fB\-d\fR file
Write debug messages to the given file.
.TP
\fB\-V\fR
Print version information.
.TP
\fB\-r\fR
Recursively load files from the given directories.
.TP
\fB\-R\fR
Load older rotated log files as well.
.TP
\fB\-t\fR
Prepend timestamps to the lines of data being read in
on the standard input.
.TP
\fB\-w\fR file
Write the contents of the standard input to this file.
.SS "Optional arguments:"
.TP
logfile1
The log files or directories to view.  If a
directory is given, all of the files in the
directory will be loaded.
.SH EXAMPLES
To load and follow the syslog file:
.PP
.Vb 1
\&    lnav
.Ve
.PP
To load all of the files in /var/log:
.PP
.Vb 1
\&    lnav /var/log
.Ve
.PP
To watch the output of make with timestamps prepended:
.PP
.Vb 1
\&    make 2>&1 | lnav \-t
.Ve
.SH AUTHOR
This manual page was written by Salvatore Bonaccorso <carnil@debian.org>
for the Debian system (but may be used by others).