Recover overwritten file
From Vim Tips Wiki
created 2002 · complexity basic · author Little Dragon · version 5.7
I was once editing a file and wanted to test something. The test was meant to add a line at the end of the file, from outside Vim. All was fine, but instead of >> to append the output to the file, I wrote > to replace the file with the output by mistake.
If you happen to do something like that, the solution is:
This command only works if you have a swap file. If you do not have a swap file, the recover command will not work.