sharing or synchronizing history between Zsh and Bash

Question

I often find myself switching between Bash and Zsh, and using the history search functionality to recover a command.

However, since Bash and Zsh have different history files, I often find that the command I'm searching for has been executed in the other shell.

Is there any way to share or synchronize history between the two?

Answer 1

If you are using the defaults for bash and zsh:

$ cat ~/.histfile >> ~/.bash_history
$ youreditor ~/.zshrc
# Here change your config to:
HISTFILE=~/.bash_history
$ rm ~/.histfile

Now you have the same file for history in both shells.