[root@poralix ~]# systemctl status firewalld.service
○ firewalld.service
Loaded: masked (Reason: Unit firewalld.service is masked.)
Active: inactive (dead)
[root@poralix ~]#
[root@poralix ~]# systemctl start firewalld.service
Failed to start firewalld.service: Unit firewalld.service is masked.
[root@poralix ~]#
[root@poralix ~]# systemctl stop firewalld.service
[root@poralix ~]#
[root@poralix ~]# systemctl disable firewalld.service
Unit /etc/systemd/system/firewalld.service is masked, ignoring.
The unit files have no installation config (WantedBy=, RequiredBy=, Also=,
Alias= settings in the [Install] section, and DefaultInstance= for template
units). This means they are not meant to be enabled or disabled using systemctl.
Possible reasons for having this kind of units are:
• A unit may be statically enabled by being symlinked from another unit's
.wants/ or .requires/ directory.
• A unit's purpose may be to act as a helper for some other unit which has
a requirement dependency on it.
• A unit may be started when needed via activation (socket, path, timer,
D-Bus, udev, scripted systemctl call, ...).
• In case of template units, the unit is meant to be enabled with some
instance name specified.
[root@poralix tools]#