Re: Problem with positional output

2016-11-16 23:17:11 +0000, Amarendra Godbole [email protected] [sed-users]:
> Linux man pages are known to lag behind and/or incorrect. Doesn¹t surprise
> me, since most focus these days seems to add more and more code, who cares
> for the manpages anyways? ;-)
[...]

This has nothing to do with Linux. We're talking of GNU sed
here. Linux has no sed command, it's just a kernel. There have
been several sed commands ported to Linux. The most common (in
terms of Linux-based system deployments in the wild) is probably
busybox' (think of embedded systems).

Busybox tools are usually shaped after their GNU equivalent
(with reduced functionality). -r was added there in 2004, and -E
in 2013 (and documented at the same time).

GNU systems (with a Linux kernel like Debian GNU/Linux, Fedora
or otherwise like Debian GNU/kFreeBSD) of course tend to ship
with GNU sed.

-- 
Stephane