I just locked myself out of a remote server for the first time in years. I’m usually better then that, but I finally screwed up and typed something that ended up requiring local intervention.

I’m going to blame all of the GNU tools for this–GNU getopt almost universally allows you to enter command-line flags anywhere on the command line. So ls -l foo and ls foo -l are equivalent. Frequently, if I need to add a new flag to an existing command line, I’ll just tack it on at the end rather then using the arrows to go back a word or two.

Unfortunately, sometimes the order matters. For instance, kill -1 1234 and kill 1234 -1 do very different things. The first one sends SIGTERM to process 1234. The second one sends SIGTERM to process 1234, as well as every other process on the system.