/usr/lib/mysql-testsuite/collections/default.release.done is in mysql-testsuite-5.5 5.5.35+dfsg-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 | /export/home/pb2/build/sb_0-10701388-1383635700.2/mysql-5.5.35-release-export-5938259_gpl/mysql-test/collections/default.release.in
|