4 ms·Brace expansion to create a backup: cp {file,.bak} reduces to cp file file.bakby ngcazz 13y agoBrace expansion to create a backup: cp {file,.bak} reduces to cp file file.bakqu4z-2 13y agoBrace expansion is great! My understanding, though, is that you'd need to write: cp file{,.bak} Was it a typo, or is there some feature/special-case I don't know about?ngcazz 13y agoOh, you're right. Thanks. (Can't edit the original comment anymore)