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[2] by VMware started to move into the server racks in the summer of 2011, but while I was researching this article, Citrix suddenly burst onto the scene with the XenServer 6.0 release [3 ... vSphere 5 vs. XenServer 6

of the million busiest sites on the web – compared with less than 17 percent for Microsoft's IIS and nearly 6 percent for the up and coming Nginx HTTP and reverse proxy server. Apache is a fairly mature project ... High performance and cloud suitability are the thrust of Apache 2.4. We give you the lowdown on transitioning your Apache HTTP Server from 2.2 to 2.4.

the biggest rentable cloud today: the Amazon Web Service. On the basis of this extremely mature technology, Citrix launched version 5.6 of its XenServer product family in May 2010. XenServer, the product built ... Version 5.6 of Citrix XenServer is a feature-stripped version of the virtualization product and is available free, in addition to the commercial Advanced, Enterprise, and Platinum editions.

-click the packet details in the packet list to add protocol fields. The release of Libpcap 1.0.0 added the ability to define the buffer size for recording and to view JPG files directly in Wireshark. Version 1.6 ... An administrator can only gain useful insights from network analysis if they understand the underlying procedures and protocols. The new version of Wireshark, 1.6, formerly known as Ethereal, can

single files across multiple storage nodes. Lustre [5] and Ceph [6] are popular examples of this technology. Before you can set up a cluster filesystem based on shared disks, you need to look out ... The vanilla kernel includes two cluster filesystems: OCFS2 has been around since 2.6.16 and is thus senior to GFS2. Although OCFS2 is non-trivial under the hood, it is fairly simple to deploy.

.0 2.2.x. 2.6.30 through 2.6.35 Debian 6 (Squeeze) 2.3.x. 2.6.36 through 3.0 Ubuntu 11.10 2.4.x. 3.1. openSUSE 12.1 2.5.x. 3

.nmap.org (64.13.134.52): Not shown: 994 filtered ports PORT STATE SERVICE VERSION 22/tcp open ssh OpenSSH 4.3 (protocol 2.0) 25/tcp closed smtp

follows the hops collected in the Via headers from Bob back to Alice. When Bob accepts the call, he sends a 200 OK (6). In contrast to the previous responses, this OK will contain a Contact header

relatively easy if you opt to download the package from the website (Listing 2). Listing 2 Installing TCP Wrappers 01 bash#> cd /tmp 02 bash#> ls tcp_wrap* 03 tcp_wrappers-7.6.sol10-sparc

, most administrators should be aware of the coming "IPocalypse," with the world running out of IPv4 addresses. If you are not already preparing for the coming of IPv6, it's time to start – and if you