0 3 * * * root mongodump --host 127.0.0.1 --port 27017 --out /opt/backup.mongo.$(date +\%Y\%m\%d) >>/var/log/backup.mongo.log.$(date +\%Y\%m\%d) 2>&1
0 1 * * * root ls -1 -t /var/log/backup.mongo.log.* | head -n-7 | xargs rm -rf; ls -1 -dt /opt/backup.mongo.* | head -n-7 | xargs rm -rf
