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Monitoring your cluster with a home-grown OCF agent
30.11.2025
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© Aleksey Mnogosmyslov, 123RF.com
-specific functions: : ${OCF_FUNCTIONS_DIR=${OCF_ROOT}/lib/heartbeat} . ${OCF_FUNCTIONS_DIR}/ocf-shellfuncs The OCF_ROOT variable, which is referenced at this point, has already been set in the Pacemaker environment
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Data Visualization Tools
07.01.2014
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, simple bars, or histograms. Conky normally writes its output directly to the desktop – more specifically to the root window (Figure 6). On request, however, Conky will present the information in a separate
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Stopping SQL Injection
21.06.2013
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it. Thanks to extensive logging capabilities, you can quickly find the root cause of any problem. In the case of the Koha library system, GreenSQL had difficulties with the set autocommit = 1
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IPRoute2: arp, route, and ifconfig in a Single Tool
06.08.2013
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with capabilities that are not immediately apparent. Although IPRoute2 is already used in many scenarios behind the scenes, its use at the command line has not quite taken root in the minds of many administrators
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The Lua Scripting Language
28.01.2014
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from source in a jiffy but is also included in most Linux distributions. A call to: luarocks searches in the repositories, and luarocks install installs it locally. Root
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Zero-Management Databases
02.10.2012
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to list and manage a database instance, manage users, and enable root access. This private beta is by inviation only at present, and they say they’re working on “storage scaling, configuration management
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Customizing PortSentry
30.03.2012
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. The following Cron entry spawns the script to fix that issue: # Flush PortSentry of LAN IPs */10 * * * * root /etc/portsentry/perm_ban_length The script in Listing 2 then runs through each of the blocked files
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Putting Windows 8 on a USB Drive
10.12.2012
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to copy Windows boot files to the root of the bootable USB drive: C:> BCDBOOT.EXE E:\WINDOWS /S E: /F ALL Boot files successfully created. This command transfers the boot or system files to the USB Drive
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Fedora 18 for Admins
11.06.2013
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or optional settings, such as the time zone, the locale, or the root password. For manual partitioning, you click on Installation destination on the Anaconda main installation menu and then select the desired
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The Road to End-of-Scale
19.06.2013
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is roughly proportional to the square root of the increase in complexity, suggesting that each new generation increases processor performance by a factor of two. Thus, if you were to apply this rule and allow

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