Might be another instance of https://github.com/systemd/systemd/issues/2913 You can verify by checking your whole journal, not just "-u tee_test.service". Am Do., 28. Okt. 2021 um 21:54 Uhr schrieb Mitchel Humpherys <mitch.special@xxxxxxxxx>: > > On Thu, Oct 28, 2021 at 12:35 AM Ulrich Windl > <Ulrich.Windl@xxxxxxxxxxxxxxxxxxxx> wrote: > > > > ANother random idea: Did you experiment with tee option "--output-error=..."? > > Just gave that a shot and didn't get any additional output :(