NetBSD是一份免費的、安全的及高度可移植的開源UNIX操作系統(tǒng)，它適合于很多種平臺，從64-bit的AlphaServers及桌面系統(tǒng)到手持及嵌入式系統(tǒng)。它在設(shè)計上非常整潔，并擁有先進(jìn)的特性，這使得它在業(yè)界和學(xué)術(shù)界都有口皆碑。用戶可通過完整的源代碼來獲得支持。很多應(yīng)用程序都可容易地從 NetBSD Packages Collection獲得。

Soren Jacobsen has announced the availability of the fourth release candidate for NetBSD 5.0, a BSD operating system designed to run on a large number of processor architectures: "Today,we have two things to be happy about. First, the fourth releasecandidate of NetBSD 5.0 is available for download. Second, thisannouncement, like RC3's, coincides with an important birthday: that ofBilly West. Below are some highlighted changes since RC3: added theRLIMIT_AS resource, which limits the total address space available toprocesses; improved NFS server stability; FFS improvements; a fix for apf(4) DoS; re(4) now works with the RealTek 8111C, which is found onmany current motherboards with Intel chipsets. As usual,src/doc/CHANGES-5.0 has the full details." Here is the brief release announcement. As usual, CD images for 41 processor architectures are available from NetBSD's FTP server and its mirrors. Two quick links to the i386 and amd64 installation CD images: i386cd.iso (229MB), amd64cd.iso (241MB).

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