Does anyone know the command on how to clear previous commands issued on AIX and Linux operating systems?

I tried "history -c" and "history clear" but did not work.

I did "history -100" and saw all the previous commands I executed, even after I logged off from the session. For security concerns, I would like to clear all the command history.

Any inputs would be greatly appreciated.

Thanks in advance.

rm ~/.bash_history

Or vi ~/.bash_history and remove the incriminating lines.

I tried both. They cleared up most of the history. Now see the last 15 or so commands I typed when issued "history".

How can I clear all previous commands?

Thanks for your help.

I don't think that you can. There seems to be a buffer of a hundred characters or so that gets written to the file when you log off. The best might be to fill the buffer with commands like "date" or "ls -l" etc.

Was reading the manual page for something else this morning, and I see that ksh-93, includes a "hist" command that "Using the hist built-in command within a compound command will cause the whole command to disappear from the history file"

"using hist built-in command within a compound command will cause the whole command to disappear from the history file"

I wonder what the command is.... please let me know if you find out.

Really appreciate you looking into this.

Thanks again!

rm ~/.bash_history # clear hist file
kill -9 $$ # kill your process to kill cash