>By default, Bash only records a session to the `.bash_history` file on disk when the session terminates. This means that if you crash or your session terminate

>By default, Bash only records a session to the `.bash_history` file on disk when the session terminates. This means that if you crash or your session terminates improperly, you lose the history up to that point. I kept loosing my history consistently on my new installation because of this. I usually put my laptop to sleep, and pretty much never intentionally terminate my x-session except on kernel updates. But because its a cheapo laptop with a crappy battery, I would occasionally run out of battery when asleep or it just wont wake up.