Clear history in CentOS

In/etc/profile, change HISTSIZE = 1000 to 0 or 1 and run the rm-rf.bash_history to clear historyhistory-c. do not write the command name to the history file when executing the command, put it in the buffer, and write it again 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, however, the actual operation only uses these two commands to change HISTSIZE = 1000 to 0 or 1 in/etc/profile to execute rm-rf. bash_history clear historyhistory-c

Do not write the command name into the history file during command execution,
Put it into the buffer and write it again 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, however, the actual operation only uses these two commands to clear the history records in the current state. after logging on again, you can see the historical records)