How to delete history records in Linux

How to delete the history record in Linux the Kindle reminds everyone that if the target is a linux server during intrusion, do not forget the history of the history command when checking whether to clear traces. 1. Modify/etc/profile and change HISTSIZE = 1000 to 0 or 1 to clear the user's home path. Bash_history 2. Clear the Current history Command records of history-c. 3. Execute the command in bash instead of writing the command name to the history file immediately, but store it in the internal buffer, when bash exits, It will be written together. However, you can call the 'History-W' command to require bash to update the history file immediately. History-w