Is there any way to open an "incognito" Terminal/shell?
Solution 1:
You did not specify which shell you are using but:
The HISTFILE environment variable defines where the history is stored. With
unset HISTFILE
you can tell bash to stop recording commands. You can re-enable it with
export HISTFILE=${HOME}/.bash_history
From man bash:
HISTFILE
The name of the file in which command history is saved (see HISTORY below). The default
value is ~/.bash_history. If unset, the command history is not saved when an interactive
shell exits.