How to delete records of linux history commands

Linux's history Command records how to delete-Linux general technology-Linux technology and application information. The following is a detailed description. As a quasi-hacker, In order to intrude into other people's server systems, it is necessary to have certain anti-reconnaissance capabilities.

How do I delete the records of the history command?

1. Modify/etc/profile and change HISTSIZE = 1000 to 0 or 1.
Clear. bash_history in user home path

2. immediately clear the history of the history commands in it.
History-c

3. When bash executes a command, it does not immediately write the command name into the history file, but stores it in the internal buffer. It is written when bash exits.

However, you can call the 'History-W' command to require bash to update the history file immediately.

History-w