Generally speaking, the linux system will save the record to the history by default after entering the command. You only need to enter the history command to view the historical command.
The hidden method is also very simple, just add a space before the command and it will not be recorded. But if you add a space, you can still see it in the history. You only need to enter the following command to hide it.
The following is a screenshot after modifying the configuration:
export HISTCONTROL=ignorespace
The demonstration effect in the figure above is obvious.
echo "123" 被history记录
echo "312" 没有被history记录到
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