Tips On Remove maas-dhcp

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Previous I always encounter problems in removing maas-dhcp, so I checked some materials show the result is because I disabled apparmor, the solution is:

$ vim /etc/default/grub
GRUB_CMDLINE_LINUX_DEFAULT="security=selinux selinux=1  apparmor=1 security=apparmor"

Add apparmor related, and reboot the computer.
Now you could remove the maas-dhcp and install new softwares.


apparmor status

View apparmor status:

sudo apparmor_status

Track Reason

Via restart you could know the exact reason:

$ sudo /etc/init.d/apparmor restart
* Reloading AppArmor profiles * AppArmor not available as kernel LSM.

The reason is because the LSM is not avaiable, by editing the grub configuration you could enable apparmor again.

Disable checking in deb

Hold the package, then you could continue with installing other packages.

# sudo apt-mark hold <package>
# echo <package> hold | sudo dpkg --set-selections