#!/usr/bin/env ssm service_type='oneshot' service_command=( /usr/bin/fsck -A -C -p ) pre_start() { printf 'Remounting / as read-only...\n' mount / -o remount,ro } start() { printf 'Checking filesystems...\n' super_start } post_start() { printf 'Remounting / as read-write...\n' mount / -o remount,rw }