Configure your shell to continuously save your history instead of only saving the history when the shell exits. (How to do this depends on whether you’re using bash or zsh, the history options in zsh are a bit complicated and I’m not exactly sure what the best way is)

I attempted this in bash like so:

``` PROMPT_COMMAND="history -a; $PROMPT_COMMAND" ```

But, that meant every shell was sharing the same history. Pressing up would go to the last command run anywhere, not just my current shell.

Sadly, I wasn't even trying to solve the problem Julia is talking about here. I just wanted to make sure my history was saved when I shutdown. Still haven't found a great solution to that. My attempts as using traps and signals caused weird issues.