Systemd error messages for custom service

[Tzafrir Cohen]

On Sun, Sep 03, 2017 at 06:44:05PM +0300, David Suna wrote:

> I am getting started with systemd on an Ubuntu 16.04 system. I have
> a custom service implemented in PHP which is outputting messages
> which I can see using journalctl. I would like to be able to filter
> on the message priority to distinguish between error messages and
> debug messages. However, all of my messages seem to be showing as
> info messages. How can I format my messages so that they will fit
> into the different log levels?<br>

Not a direct answer, but have you tried filtering using --unit?

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