zarniwhoop at ntlworld.com
Thu Dec 7 01:09:14 UTC 2017
On Thu, Dec 07, 2017 at 12:55:42AM +0000, RW via freebsd-questions wrote:
> Can anyone explain why '-' needs escaping in the following. What
> special meaning does it have outside of ?
> $ echo 'a-b' | grep 'a-b'
> $ echo 'a-b' | grep '-b'
> Usage: grep [OPTION]... PATTERN [FILE]...
> Try `grep --help' for more information.
> $ echo 'a-b' | grep '\-b'
In gnu grep, '-' indicates it should read from STDIN, I assume that
FreeBSD's grep is the same.
Truth, in front of her huge walk-in wardrobe, selected black leather
boots with stiletto heels for such a barefaced truth.
- Unseen Academicals
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