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100%
The Ruby Version Manager (RVM) hands-on
30.11.2025
Home »  Archive  »  2011  »  Issue 6: Perfor...  » 
©Mettusr, 123RF.com
distribution. To pass in the configuration parameters for the configure script directly, use: rvm install 1.9.2 --without-readline JRuby and other Ruby interpreters are installed in the same way (e ... RVM makes managing multiple Ruby interpreters, versions, and Gemsets more or less child's play. ... The Ruby Version Manager (RVM) hands-on
37%
Port-based access protection with NAP and 802.1X
30.11.2025
Home »  Archive  »  2012  »  Issue 09: Windo...  » 
© PAnja Kaiser, Fotolia.com
of NAP are available for access protection, including: DHCP, VPN, IPSec, Terminal services (e.g., Remote Desktop Services), and IEEE 802.1X devices. This article relates to access via wired 802.1X devices ... Mobile devices require special security considerations. In combination with IEEE 802.1X, Network Access Protection can ensure that mobile devices maintain the necessary security standards before they ... NAP with 802.1X ... Port-based access protection with NAP and 802.1X
35%
Managing virtual infrastructures with oVirt 3.1
31.10.2025
Home »  Archive  »  2012  »  Issue 11: Cloud...  » 
© Kheng Ho Toh, 123RF.com
based on Windows. Bye-Bye Windows Although the Red Hat developers ported all the components of the management component, RHEV-M, from C# to Java in RHEV 3.0 [1], use of the Administrator Console ... Version 3.1 of the oVirt management platform for virtual infrastructures has recently become available. On Fedora 17, the new release is easy to install and deploy. ... oVirt 3.1 ... Managing virtual infrastructures with oVirt 3.1
29%
OpenStack workshop, part 1: Introduction to OpenStack
31.10.2025
Home »  Archive  »  2012  »  Issue 12: NAS S...  » 
in Launchpad (Figure 1). When Ubuntu made the whole thing more or less official back in May 2011 and dropped Eucalyptus in favor of OpenStack as its cloud solution, a murmur went through the developer community ... OpenStack workshop, part 1: Introduction to OpenStack
29%
How Upstart boots Ubuntu-based systems
30.11.2025
Home »  Archive  »  2012  »  Issue 07: Xen v...  » 
debuted in Ubuntu 11.10. The initctl show-config command that gives an overview of the jobs has been around since Upstart 0.6.4 (Figure 3): initctl show-config -e > output ... accelerates the boot process. Yet, configuration is almost child's play.
25%
Optimizing Hyper-V network settings
30.11.2025
Home »  Archive  »  2011  »  Issue 6: Perfor...  » 
© Stefan Hermans, Fotolia.com
asynchronous replication of virtual servers on Hyper-V hosts without the need for a host to belong to a cluster. Again, the hosts should use dedicated network cards. Fast migration in Hyper-V 1.0 (Windows ... Performance problems with virtual servers on Hyper-V are often caused by a network access bottleneck, but various optimization settings can help speed things up.
23%
Check your VoIP networks with SIPVicious and sngrep
30.11.2025
Home »  Archive  »  2025  »  Issue 90 VoIP N...  » 
Photo by Quino Al on Unsplash
(6192 bits), 774 bytes captured (6192 bits) Ethernet II, Src: 00:1a:2b:3c:4d:5e, Dst: 00:6f:7g:8h:9i:0j Internet Protocol Version 4, Src: 192.168.1.101, Dst: 192.168.1.104 User Datagram Protocol, Src Port
19%
Beyond monitoring: Mathematical load simulation in Perl
30.11.2025
Home »  Archive  »  2011  »  Issue 6: Perfor...  » 
© kudryashka, 123RF.com
Model"; 11 $work = "ebiz-tx"; 12 $node1 = "WebServer"; 13 $node2 = "AppServer"; 14 $node3 = "DBMServer"; 15 $think = 0.0 * 1e-3; # as per test system 16 $dtime = 2.2 * 1e-3; # dummy service time 17 18
18%
Galera Cluster for MySQL
30.11.2025
Home »  Archive  »  2012  »  Issue 10: Traff...  » 
© Noel Powell, fotolia.com
MySQL-shared-compat-5.5.22-2.el6.x86_64.rpm rpm -i MySQL-client-5.5.22-1.el6.x86_64.rpm With CentOS 6, the following additional package is necessary: yum install openssl098e.x86_64 The easiest way
18%
OpenVPN with e-tokens in large-scale environments
30.11.2025
Home »  Archive  »  2011  »  Issue 5: Pen Te...  » 
© sTan, fotolia.com
13 pkcs11-id 'Aladdin\x20Knowledge\x20Systems\x20Ltd\xxx/eToken/0000xxxx/eToken\xxx\xxx\xxxxxx/xxxx' 14 15 management 127.0.0.1 4711 16 management-query-passwords 17 18 cipher BF-CBC 19 comp-lzo 20 ... Simple VPNs might not provide enough security alone; instead, try a carefully crafted mix of OpenVPN and Aladdin e-tokens. ... OpenVPN with e-tokens in large-scale environments

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