linux search history code example

Example 1: shell search history

sudo add-apt-repository ppa:ultradvorka/ppa && sudo apt-get update && sudo apt-get install hstr && hstr --show-configuration >> ~/.bashrc && . ~/.bashrc

Example 2: linux history command

Just check the enumeration of your commands history and then delete them:
history -d 7 #Deletes seventh command in your history list