Create a Daemon using Linux

This ReadMe as well as the template to install a Daemon using Linux can also be found inside the installation package in the following folder:


systemd pap service usage/installation example

note: Requires root permissions

note: the systemd specific privateTemp setting *must not* be used inside the service description

note: the whole <install_dir> path including all higher level directories need to have at least read-and-execute permissions

Recommendation: unpack the installer below a non-userspecific directory (such as e.g. /opt)

note: a --cachefolder option *must* be used, *even* if the user executing the service actually has a home directory

note: the <install_dir> must be owned by the user executing the service. For example if /opt/callas/pdfaPilot-CLI is used as <install_dir>, then the appropriate chown command would be

sudo chown -R nobody:daemon /opt/callas/pdfaPilot-CLI

note: the same applies to the cachefolder.


(1) cp systemd.pap.service.template to pap.service (locally)

(2) edit pap.service and adjust the given path specs (e.g. INSTALL_DIR --> real installation directory)

(3) setup a cache folder (note: must be owned/writable by the executing user, e.g. by running 'sudo chown nobody:daemon <given_cache_folder>')

(4) copy the service description to the systemd service directory

sudo cp pap.service to /lib/systemd/system

note: /lib/systemd/system/pap.service must be a regular file and *not* a symbolic link

note: 'sudo systemctl daemon-reload' is needed whenever /lib/systemd/system/pap.service is changed

(5) check if the service is working as expected ...

sudo systemctl daemon-reload
sudo systemctl start pap
systemctl status pap

sudo systemctl stop pap
systemctl status pap

sudo systemctl restart pap
systemctl status pap

(6) when everyting is working as excpected ...

(7) set pap service to auto start on reboot

sudo systemctl enable pap

now, when the system reboots next time it will automatically also start the pdfaPilot in --server mode.

(8) to disable the pap service on next reboot...

sudo systemctl disable pap