# systemctl mask named # systemctl unmask named-chroot
# systemctl start named Failed to start named.service: Unit is masked. # echo $? 1
mask NAME... Mask one or more unit files, as specified on the command line. This will link these units to /dev/null, making it impossible to start them. This is a stronger version of disable, since it prohibits all kinds of activation of the unit, including enablement and manual activation. Use this option with care. This honors the --runtime option to only mask temporarily until the next reboot of the system. The --now option can be used to ensure that the units are also stopped. unmask NAME... Unmask one or more unit files, as specified on the command line. This will undo the effect of mask.