2020年9月8日 · It all come down to whether you are speaking legally, or from a technology viewpoint. Legally, FreeBSD, like Linux, cannot use the trademarked term Unix. From a technology point of view, FreeBSD is as much Unix as Solaris, HP-UX, or any of the other commercial versions that have paid to be able to be legally called Unix.

For more info, I suggest you read a brief article on the creation of GNU, OSS, Linux, BSD, and UNIX. They will be slanted towards their individual ideas, but when you read through, you will get a good idea of the differences. This Unix genealogy diagram clearly shows the history of Unix, BSD, GNU and Linux (from Wikimedia):

The analysis in the standard's rationale of BSD versus AT&T Unix command-line options is a lot more thoughtful than any of M. Cahalan's ever were. This ps famously introduced the I_WANT_A_BROKEN_PS environment variable, which confusingly M. Cahalan blamed on M. Johnson whilst simultaneously claiming xyrself to be responsible for the option parsing.

BSD is what you get when a bunch of Unix hackers sit down to try to port a Unix system to the PC. Linux is what you get when a bunch of PC hackers sit down and try to write a Unix system for the PC.--BSD is designed. Linux is grown. Perhaps that's the only succinct way to describe it, and possibly the most correct.

It all starts with AT&T distributing their operating system to some universities for free. This Unix was improved extensively at Berkeley and became the foundation for the BSD variations of Unix and incorporated several new innovations like the "Fast File System" (UFS), introduced symlinks and the sockets API.

2011年5月22日 · Userland (Linux uses GNU while BSD uses BSD) Integration (Linux is a collection of different efforts, BSD is much more unified at the core) Packaging (Linux typically manages installed software in binary packages - BSD typically manages a "ports" tree that you use to build software from sources)

2019年1月27日 · You can trace UNIX from there to either (closed-source) System V UNIX or BSD. If you want to go down the BSD path, FreeBSD is a good option. For a System V-like system, your only real free option would be OpenSolaris. But nowadays, Linux is as pure a unix-like system as any, with its own, even messier heritage. (You can get a taste of it here.)

2017年4月16日 · The BSD format in which you should not precede the flags with a dash. Now does the same flags can be used with both formats, for example do the following commands mean the same things: ps -x ps x Or does the Unix format has its own set of flags, while the BSD format has an entirely different set of flags?

(that formulation actually makes a bit more sense to me for comparing these). I don't have a problem with this question except its scope. "UNIX, BSD and FreeBSD" isn't a very well defined set of things. I'm not even sure if what is meant is from a …

2011年5月13日 · Meanwhile, in Berkeley, a number of academics were unhappy with the licensing situation and decided to create a version of Unix that didn't include any AT&T-licensed code. Thus in the early 1980s the Berkeley Software Distribution, or BSD, became a free variant of Unix. BSD first ran on Minicomputers such as PDP-11 and VAXen.