From the zsh manpage: >| word >! word Same as >, except that the file is truncated to zero length if it exists, even if CLOBBER

From the zsh manpage: >| word >! word Same as >, except that the file is truncated to zero length if it exists, even if CLOBBER is unset. Note: If you're a bash user the >| syntax is available, but not >!.