Clusterfsck
A particular type of general clusterfuck specifically and wholly related to the subject matter of computer systems or operations gone wrong. Such things as a botched server migration or bare metal restore from tape backup which has failed to restore a domain controller qualify. May also be used in relation to specifically Linux or Unix matters gone awry.
"That damn former administrator skipped out on us, encrypted all the databases and sent an email to the company wide distribution list demanding 1000 BTC in ransom! What a clusterfsck!"