#!/bin/sh

(
    cd /opt/atlassian/confluence.application-data/backups
    for f in daily-backup-*.zip; do
        [ $(ls daily-backup-*.zip | wc -l) -gt 10 ] || break
        rm -vf "$f"
    done
)

EXITVALUE=$?
if [ $EXITVALUE != 0 ]; then
    /usr/bin/logger -t confluence "ALERT exited abnormally with [$EXITVALUE]"
fi
exit 0 …