/etc/default/mysql is in percona-xtradb-cluster-server-5.7 5.7.20-29.24-0ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | # defaults file for percona server
STARTTIMEOUT=120
STOPTIMEOUT=600
|