A warning in regard of mdb

You are virtuously using mdb -w to tune a system and type all the commands from memory … however you can still fsck up the whole system with a single mistake while using it. The mistake in my case was thinking i’m in the left window whereas i was in the right window. In the left window i wanted to exit out of a shell. In the right window was a waiting mdb -kw(yes, the basic mistake to have it left open). At the end the system was doing a panic right after leaving mdb. An explanation for this behaviour can be found here. When using mdb -kw do it like Swigert in the Apollo 13 film … put a Post-it on your screen saying “Don’t exit”. Control+D is your way to leave the mdb.