Just discovered something that may help to debug:
It does not happen with a simple Hello World bash script instead of the Check MK Agent. It does not happen when the Encryption of the Check MK Agent is disabled. It happens when the Encryption of Check MK is enabled, which should be AES 128/256 output. So it seems to be related to the kind of output what the script returns.. Im now unsure if its really a Debian/Systemd bug. If someone tries to reproduce this here is the script https://pastebin.com/ySdNu57A. To enable the encryption create a file /etc/check_mk/encryption.cfg with the content: ENCRYPTED=yes PASSPHRASE='test Kind Regards, Julian
