/etc/init/mtab.sh.conf is in mountall 2.54.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 | # mtab.sh - compatibility job for sysvinit dependencies
#
# This job runs once virtual filesystems are mounted, to signal startpar
# that other rcS jobs relying on the historic mtab.sh interface can continue.
start on virtual-filesystems
|