Clear history in Linux

In Linux, clear the history and change histsize = 1000 to 0 or 1 in/etc/profile to execute Rm-RF. bash_history clear historyhistory-C when executing the command, do not write the command name into the history file, put it in the buffer, and then write it together when exiting, you can also call the history-W command to update the history file (many sayings on the Internet are history-C + history-W, but the actual operation only uses these two commands to clear the history records in the current status, after logging on again, you can see the history again)