Paolo Alexis Falcone wrote:
Even programming-wise they're also the same. Or at least API-wise. The
POSIX standard is the intersection between the old SVR4 and BSD APIs.
POSIX can only offer a subset of the facilities of advanced operating
systems. When you want to start using the more advanced stuff, you have
to resort to calls beyond those offered by POSIX. For something as
basic as even process creation (i.e. forking), proprietary versions of
the calls seem to abound.
The hell that is the autotools haunts us precisely because unix is not
a unix is not a unix.
The situation is just as varied on the system administration side. While the
basic command line tools are the same, different distros offer different
higher level tools. The main thing I'm concerned about is inadvertently
hiring a sysadmin who only knows how to work with RH's proprietary add-ons
and who doesn't know how to work with the more fundamental unix tools these higher
level utilities work on top of. People who have no idea that samba.conf exists
or how to work directly with it (which is the most ideal way under Slackware)
for example. How many of this type of sysadmin are out there?
Tru64, Unixware and an old copy of UNIX SVR4 I "dug" in QC City Hall :D
- contain more similarities than differences in the feel and API.
More similarities than differences, yes I agree. That's why we can bunch
them under the collective term *nix. However there has not been a thing
such as 'a Unix' for the longest time.
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