On Fri, Aug 20, 2021 at 2:11 PM Mantas Mikulėnas <grawity@xxxxxxxxx> wrote:
On Fri, Aug 20, 2021 at 2:10 PM Nishant Nayan <nayan.nishant2000@xxxxxxxxx> wrote:Regarding the below point :c) The service prints to stdout/stderr, but systemd attaches the service's stdout/stderr to a pipe which is read by journald (using sd_journal_stream_fd(3) from libsystemd). See [Service] StandardOutput= in systemd.service(5).I did not see StandardOutput field in [Service] sections of a service file, for example sshd.service, but its logs are visible in journalctl.Is it by default piped to journal and we need to explicitly mention it (StandardOutput=) only when we want to redirect it somewhere else?StandardOutput=journal is the default setting.
And, actually, sshd doesn't write its messages to stdout anyway – it uses syslog() via /dev/log; most daemons do.
Mantas Mikulėnas
