301B Question #78: Real Exam Question with Answer & Explanation

Given: Filesystem Size Used Avail Use% Mounted on /dev/md11 248M 248M 0 100% / /dev/md13 3.0G 76M 2.8G 3% /config /dev/md12 1.7G 1.7G 0 100% /usr /dev/md14 3.0G 214M 2.7G 8% /var /dev/md0 30G 2.2G 26G 8% /shared /dev/md1 6.0G 488M 5.3G 9% /var/log none 3.9G 452K 3.9G 1% /dev/shm none 3.9G 19M 3.9G 1% /var/tmstat none 3.9G 1.2M 3.9G 1% /var/run prompt 4.0M 12K 4.0M 1% /var/prompt /dev/md15 12G 8.3G 3.1G 74% /var/lib/mysql Which command is used to produce this output?