[TUHS] moving directories in svr2

[Larry McVoy]

On Fri, Dec 31, 2021 at 01:17:18PM -0500, Dan Cross wrote:
> On Fri, Dec 31, 2021, 10:54 AM Adam Thornton <athornton at gmail.com> wrote:
> 
> > Slightly older, but also slightly more fundamental to the system, you need
> > look no farther than Solaris's `/bin/sh` for an illustrated example of the
> > pros and cons of maintaining backwards compatibility. [snip]
> >
> 
> Sun is not the exemplar here: the move from SunOS 4's BSD userland to
> Solaris 2's SVR4 broke tons of things. They didn't seem to mind that their
> customers had to pay the cost of adaptation.

I was there for that and I minded like crazy.  It was a hugely bad move
in my opinion.  Time has not changed that.

> The Linux example is also a bit strange. The move from e.g. `ifconfig` and
> `netstat to `ip` and `ss` required lots of local retooling 

I never understood why Linux did that.