lnav
TLDR
View log files
$ lnav path/to/log
View logs in a directory$ lnav /var/log/
View remote log files via SSH$ lnav ssh user@host:/var/log/syslog
Validate log format configuration$ lnav -C path/to/log
Include rotated/archived logs$ lnav -R /var/log/syslog
Run headless with command$ lnav -n -c ":filter-in error" path/to/log
SYNOPSIS
lnav [-hVsar] [logfile1 logfile2 ...]
DESCRIPTION
lnav is an advanced log file viewer that leverages semantic information from log files. It can interleave messages from multiple files, create time-based histograms, and provides efficient navigation through logs using hotkeys.
PARAMETERS
-h
Display help information-H
Show internal help text-V
Print version details-n
Run in headless mode without UI-c CMD
Execute command after loading files-f PATH
Run commands from a configuration file-I PATH
Add directory to configuration search path-q
Quiet mode; suppress messages-i
Install format files to user directory-u
Update installed format files from repositories-C
Validate configuration and log format files-d FILE
Output debug messages to file-r
Recursively load files from directories-R
Include rotated and archived log files-t
Add timestamps to stdin data-w FILE
Write stdin content to file
CAVEATS
Press "?" for online help while running, and "q" to exit. lnav automatically detects and parses many common log formats. Custom formats can be defined in configuration files.
HISTORY
lnav was created to provide an advanced log file navigator with automatic format detection, syntax highlighting, and efficient navigation for system administrators and developers.
SEE ALSO
less(1), tail(1), journalctl(1), multitail(1)
