/etc/systemd/system/[email protected]
EnvironmentFile=-/etc/env.%i
ExecStart=/bin/sh -c "$SOME_ARGUMENT xD"
/etc/env.123
SOME_ARGUMENT=foo
SOME_OTHER_ARGUMENT=bar
sudo systemctl start myservice@123
/etc/systemd/system/[email protected]
EnvironmentFile=-/etc/env.%i
ExecStart=/bin/sh -c "$SOME_ARGUMENT xD"
/etc/env.123
SOME_ARGUMENT=foo
SOME_OTHER_ARGUMENT=bar
sudo systemctl start myservice@123