How to load bash command history from file

Question

I am moving from one server to another, but want to keep my history, so I dumped it into a file.

history > file.txt

Is there a way to overwrite the commands-history of bash and load it from a file?

Answer 1

The following will append the contents of file.txt to the current in-memory history list:

history -r file.txt

You can optionally run history -c before this to clear the in-memory history.