[Linux] find, delete 非常危險一定要注意

https://unix.stackexchange.com/questions/150628/why-does-find-delete-delete-all-files-in-a-directory-recursively

In find argument order matters, a lot.

Arguments can be options, tests and actions. You should typically use options first, then tests, then actions.

Sometimes find even warns you about a possible bad ordering (for example when you use -maxdepth after other arguments), but others it seems it doesn't.

What find . -delete -name '*ar' does is:

1. Finds files and directories upon current directory.
2. Deletes them ALL as they are found!
3. Then sees if they are named like '*ar' (this part has no effect now).

What you probably want to do is:

find -name '*ar' -delete

This will, for every file, see if it matches '*ar', and only if it satisfies the condition it will delete the file.

Sorry if you found out too late.