HowTo: Clean .jnl files

.jnl files grow in the /var/lib/bind/ directory as bind9 operates. They make it a bit difficult/confusing whenever the database file needs to be edited. Here’s how to flush those .jnl files into their main database files:

sudo rndc sync -clean ustiger.local
sudo rndc sync -clean 178.168.192.in-addr.arpa

Consider putting this in a cron script to be run periodically (daily?).