Fixing the Ubuntu bind9 named process 99% cpu usage issue

If you find the named process on your Ubuntu/Linux based server taking up a high amount of (e.g. 99%) CPU time, then check if the /var/cache/bind directory has the correct permissions.

If you run ll -d /var/cache/bind and find that only the root user has write permissions to the directory, i.e. it looks like the following:

drwxr-xr-x 2 root root 4.0K Apr 14 15:29 /var/cache/bind

Switch to the root user and change the group to bind, and give it write permissions, by running the following:

chown root:bind /var/cache/bind
chmod g+w /var/cache/bind

Then you will just need to restart bind9 by running the following:

service bind9 restart

Now it should be behaving better.

Author: Musaul Karim

Software Engineer, Hobbyist Photographer, and a bit of a gadget geek.

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