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10%
Server virtualization with VirtualBox
30.11.2025
Home »  Archive  »  2012  »  Issue 10: Traff...  » 
© Federico Caputo, 123RF.com
. Listing 1 Installing the Extension Pack $ vboxmanage -v 4.1.12r77245 $ wget http://download.virtualbox.org/virtualbox/4.1.12/Oracle_VM_Virtualbox_Extension_Pack-4.1.12-77245.vbox-extpack $ sudo
10%
New Approaches to DNS
02.06.2026
Home »  Archive  »  2026  »  Issue 93 Disast...  » 
Lead Image ©bowie15, 123RF.com
://www.dnsdist.org/index.html The Author A Linux user since the late '00s, Paul Nixer is a FOSS advocate, always exploring new open source technologies. He is passionate about privacy
10%
Dispatches from the world of IT
31.10.2025
Home »  Archive  »  2012  »  Issue 11: Cloud...  » 
 
services will account for 16 percent of IT revenue in the following technology categories: applications, system infrastructure software, platform as a service (PaaS), servers, and basic storage. Additionally
10%
The Swiss Army knife of fault management
30.11.2025
Home »  Archive  »  2011  »  Issue 5: Pen Te...  » 
© Dmitry Rukhlenko, 123RF.com
, some parts of which are standardized and some of which are defined by the device manufacturer. In production, the Standard MIB II ranges (1.3.6.1.2.1.*) and the vendor-specific area below
10%
Managing Logs
06.08.2026
Home »  Archive  »  2026  »  Issue 94 OpenSt...  » 
Photo by Conny Schneider on Unsplash
deploying the Graylog Data Node, check the service status with systemctl. If the setup was successful, the output will include a status line: Active: active (running) since Sun 2025-10-12 10:15:22 CEST
10%
Clustering with OpenAIS and Corosync
30.11.2025
Home »  Archive  »  2011  »  Issue 3: Are yo...  » 
brunoilfo, 123RF.com
node fails. In cluster versions 1.0 and 2.0, rgmanager was the only master of the Red Hat Cluster, but as of cluster version 3.0, the pacemaker tool is now included with RHEL 6 and Fedora 12 or newer
9%
Intruder detection with tcpdump
30.11.2025
Home »  Archive  »  2012  »  Issue 07: Xen v...  » 
© Monika Wisniewska, 123RF.com
uses the syntax tcpdump -n -I -s where -n means tcpdump should not resolve IP addresses to domain names or port numbers to service names, -I is the interface to use
9%
Virus scanner and content filter with AD authentication
30.11.2025
Home »  Archive  »  2010  »  Issue 0: Active...  » 
Denis Makarov, 123RF.com
=~ s/%([0-9a-fA-F][0-9a-fA-F])/pack("U",hex($1))/eg; 11 # test for each group squid sent in its request 12 foreach $group (@groups) { 13 $group =~ s/%([0-9a-fA-F][0-9a-fA-F])/pack("U",hex($1))/eg
9%
Ceph Dashboard at a Glance
02.06.2026
Home »  Archive  »  2026  »  Issue 93 Disast...  » 
Lead Image © Prin Pattawaro, 123RF.com
in a short space of time. Object Storage Daemons (OSDs) [6], for example, can fail because the underlying drive has failed. In this case, placement groups [7] change their states, resulting in rebalancing
9%
Linux small business servers compared
31.10.2025
Home »  Archive  »  2012  »  Issue 11: Cloud...  » 
© Umzugskartons, fotolia.
. Unfortunately, version 2.2, available since September 2011, is no longer up to date as far as software packages are concerned, which in some cases could lead to weaknesses in security. Version 2.2 runs on top

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