Converting timestamps in Nagios log messages to localtime

[atc0005]

Found this example:

cat /usr/local/nagios/var/nagios.log | perl -pe 's/(\d+)/localtime($1)/e'

earlier while looking for confirmation regarding what timestamp format I was looking at.

refs https://geekpeek.net/nagios-log-convert-timestamp/

[atc0005]

Also applicable (if using Go to do the conversion):

• https://pkg.go.dev/time#Unix
• https://stackoverflow.com/a/24987221/903870
• https://stackoverflow.com/a/45679626/903870