If the environment variable HISTCONTROL contains the keyword ignorespace, then commands starting with a space won't be saved in the history list; usable in situ

If the environment variable HISTCONTROL contains the keyword ignorespace, then commands starting with a space won't be saved in the history list; usable in situations like this. (Of course, the command will be visible in the process list, so if you are on a shared system, it is still not a good idea)