> The entire process took about eight seconds. And then he did what he had always done since he first started programming computers: he deleted his bash history. To access the computer he was required to type his password. If he didn’t delete his bash history, his password would be there to see, for anyone who had access to the system.

It seems that deleting his bash history was something _routine_ that he did every time, not some one-off thing to fix an occasional mistake.