[Unit]
Description=My example daemon

[Service]
Type=forking
User=example_user
ExecStart=/path/to/my_executable
ExecStop=kill -QUIT $MAINPID
PIDFile=/var/run/example/example.pid

[Install]
WantedBy=multi-user.target

type path mode ownership age argument

d /var/run/example 0755 example_user - -

[Unit]
Description=My example daemon

[Service]
Type=forking
User=example_user
# Run ExecStartPre with root permissions
PermissionsStartOnly=true
ExecStartPre=-/usr/bin/mkdir /var/run/example
ExecStartPre=/usr/bin/chown -R example_user /var/run/example/
# Run ExecStart with example_user permissions
ExecStart=/path/to/my_executable
ExecStop=kill -QUIT $MAINPID
PIDFile=/var/run/example/example.pid

[Install]
WantedBy=multi-user.target