Subj : Debian 12 changes syslogd to journald
To   : All
From : MeaTLoTioN
Date : Fri Jun 30 2023 09:11:00

Hi y'all,

I posted this over in matrixland but thought it might be of benefit here also;


With the release of Debian 12, there are a few changes that people need to be 
aware of, one specifically that I came across today was that rsyslog no longer 
ships and installs by default, it's now using journald solely for logging 
system events.

A quick cheatsheet type command to see the syslog for today using journalctl;

  journalctl --since today

This will show all events since midnight today. Another useful part is you can 
specify which services to filter too, i.e.; 

 journalctl --since today -xeu dhcpcd 

This will show you just the logs for the dhcpcd service.

As always, if unsure read the man page, its useful.. but if you need a hand 
lemme know and I will try and help. 

Remember also, that this really only is a thing you MUST pay attention to if 
you install Debian 12 from scratch. If you upgrade from 11 then you will still 
have the log files in /var/log like /var/log/syslog or /var/log/daemon etc.

The --since argument can be used with most types of date format, i.e.;

--since today = anything from midnight this morning
--since 10:00 = anything from 10:00 this morning
--since 2023-06-01 = anything from June 1 2023 00:00:00
  (omitting something assumes the default, time = 00, date = 1)

I hope that this helps someone

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