How To Install LNAV log file Navigator in Ubuntu

To install LNAV log file Navigator in Ubuntu

Log File Navigator(LNAV) is an open source enhanced log file viewer. It provides accurate information of files being viewed along with the time stamps and log levels. Installation of LNAV log file Navigator in Ubuntu is explained.

Features

• It displays filter lines
• It queries log through SQL.
• Automatic data extraction is supported.
• Single log view support is enhanced.
• Syntax highlighting with configurable colourizing
• Supports Timeline view

To install LNAV package

Run the following command to install the LNAV package.

root@user1-linuxhelp:/home/user1# apt-get install lnav 
Reading package lists... Done
Building dependency tree        
Reading state information... Done
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.
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Unpacking lnav (0.7.0-3build1) ...
Processing triggers for man-db (2.7.4-1) ...
Setting up lnav (0.7.0-3build1) ...

To view the log files

root@user1-linuxhelp:/home/user1# lnav 

To view the major options of LNAV

root@user1-linuxhelp:/home/user1# lnav -h

To view the latest syslog file

root@user1-linuxhelp:/home/user1# lnav -s 

To view all the latest syslog file

root@user1-linuxhelp:/home/user1# lnav -a

To view the older syslog files

root@user1-linuxhelp:/home/user1# lnav -r 

To view the log file with timestamps options

root@user1-linuxhelp:/home/user1# lnav -t

To view the version of LNAV

root@user1-linuxhelp:/home/user1# lnav &ndash V 
lnav 0.7.0

Hotkey option

Use the ‘ i’ key from keyboard to switch to/from the histogram view.

Use the ‘ p’ key from keyboard to view the log parser result.

Use the ‘ m’ key to mark the top log files.
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Use " shift + j" key to view the continuous lines of the log file.

Use " shift + k" to unmark the files one by one.