akkor RFE a systemd bugzillaba es addig hasznalj cront-t
man 5 crontab
@reboot
EXTENSIONS
These special time specification "nicknames" which replace the 5 initial time and date
fields, and are prefixed with the '@' character, are supported:
@reboot : Run once after reboot.
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A legértékesebb idő a pillanat amelyben élsz.
https://sites.google.com/site/jupiter2005ster/