systemd менеджер по системе и сервису (systemd system and service manager)
DIRECTORIES
System unit directories
The systemd system manager reads unit configuration from
various directories. Packages that want to install unit files
shall place them in the directory returned by pkg-config
systemd --variable=systemdsystemunitdir. Other directories
checked are /usr/local/lib/systemd/system and
/usr/lib/systemd/system. User configuration always takes
precedence. pkg-config systemd
--variable=systemdsystemconfdir returns the path of the
system configuration directory. Packages should alter the
content of these directories only with the enable and disable
commands of the systemctl(1) tool. Full list of directories
is provided in systemd.unit(5).
User unit directories
Similar rules apply for the user unit directories. However,
here the XDG Base Directory specificationpkg-config systemd
--variable=systemduserunitdir. Global configuration is done
in the directory reported by pkg-config systemd
--variable=systemduserconfdir. The enable and disable
commands of the systemctl(1) tool can handle both global
(i.e. for all users) and private (for one user)
enabling/disabling of units. Full list of directories is
provided in systemd.unit(5).
SysV init scripts directory
The location of the SysV init script directory varies between
distributions. If systemd cannot find a native unit file for
a requested service, it will look for a SysV init script of
the same name (with the .service suffix removed).
SysV runlevel link farm directory
The location of the SysV runlevel link farm directory varies
between distributions. systemd will take the link farm into
account when figuring out whether a service shall be enabled.
Note that a service unit with a native unit configuration
file cannot be started by activating it in the SysV runlevel
link farm.
