Take the 2-minute tour ×
Unix & Linux Stack Exchange is a question and answer site for users of Linux, FreeBSD and other Un*x-like operating systems.. It's 100% free, no registration required.

CentOS is "derived entirely from the Red Hat Enterprise Linux (RHEL) distribution" (more here).

  1. Does it fall into any UNIX System V family? Such as PDP-11 or etc?

  2. If not, where does CentOS stands for comparing with System V family for zero downtime or performance etc?

share|improve this question
1  
PDP-11 is not an Unix version, but a line of computers produced in the 70's and 80's by DEC. –  Tadeusz A. Kadłubowski Jun 12 '12 at 11:08

1 Answer 1

up vote 5 down vote accepted

CentOS is a Linux variant, and therefore shares no code with AT&T Unix System V.

The Linux kernel does support many System V system calls, and as such, a lot of software written for System V was able to be ported over fairly easily. These days, I'd wager that a lot more software is written first for Linux, and then maybe ported to a modern System V derivative like Solaris.

Linux also supports a lot of BSD system calls, by the way. As Unix and Unix-like operating systems go, Linux is the most ecumenical in terms of facilities it supports.

So, Linux is System V if you squint. It is also BSD, and it is also neither.

Linux is Linux.

share|improve this answer

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.