clear command hisotry HowTo - Linux / Unix Q & A from nixCraft

How to delete a single command from history on a Linux/Unix Bash shell

in BASH Shell, Debian / Ubuntu, FreeBSD, Linux, Mac OS X, RedHat and Friends, UNIX last updated January 30, 2018

I‘m working in Ubuntu bash terminal application and remotely on a RHEL server in cloud platform. I typed the wrong and dangerous command. I no longer wish to remember dangerous command in the history file. How can I remove or delete a single command from bash history file?

Clear Linux / UNIX BASH Shell Command Line Cache / History

in BASH Shell, CentOS, Debian / Ubuntu, Linux, RedHat and Friends, Suse, Ubuntu Linux, UNIX last updated January 30, 2018

I just noticed tutorial about clearing DNS cache, and there are lots of commands stored in my bash shell cache. Can you tell me the command to clear out my command history or cache from a shell prompt?
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