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	<title>Linux 101 Hacks &#187; 12. System Monitoring and Performance</title>
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	<link>http://linux.101hacks.com</link>
	<description>Free eBook to Build a Strong Foundation in UNIX / Linux</description>
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		<title>Hack 101. Renice Command Examples</title>
		<link>http://linux.101hacks.com/monitoring-performance/hack-101-renice-command-examples/</link>
		<comments>http://linux.101hacks.com/monitoring-performance/hack-101-renice-command-examples/#comments</comments>
		<pubDate>Wed, 30 Dec 2009 02:02:34 +0000</pubDate>
		<dc:creator>Ramesh</dc:creator>
				<category><![CDATA[12. System Monitoring and Performance]]></category>

		<guid isPermaLink="false">http://linux.101hacks.com/?p=306</guid>
		<description><![CDATA[Renice alters the scheduling priority of a running process. How to decrease the priority of a running process? (Increase nice) In the example below, an existing shell-script is running at nice value of 10. (6th column in the ps output) $ ps axl &#124; grep nice-test 0 509 13245 13216 30 10 5244 968 wait [...]]]></description>
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		<slash:comments>0</slash:comments>
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		<title>Hack 100. Nice Command Examples</title>
		<link>http://linux.101hacks.com/monitoring-performance/hack-100-nice-command-examples/</link>
		<comments>http://linux.101hacks.com/monitoring-performance/hack-100-nice-command-examples/#comments</comments>
		<pubDate>Wed, 30 Dec 2009 02:00:57 +0000</pubDate>
		<dc:creator>Ramesh</dc:creator>
				<category><![CDATA[12. System Monitoring and Performance]]></category>

		<guid isPermaLink="false">http://linux.101hacks.com/?p=304</guid>
		<description><![CDATA[Kernel decides how much processor time is required for a process based on the nice value. Possible nice value range is: -20 to 20. A process that has a nice value of -20 is very high priority. The process that has a nice value of 20 is very low priority. Use ps axl to display [...]]]></description>
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		<slash:comments>3</slash:comments>
		</item>
		<item>
		<title>Hack 99. Sysctl Command Examples</title>
		<link>http://linux.101hacks.com/monitoring-performance/sysctl-command-examples/</link>
		<comments>http://linux.101hacks.com/monitoring-performance/sysctl-command-examples/#comments</comments>
		<pubDate>Wed, 30 Dec 2009 01:58:54 +0000</pubDate>
		<dc:creator>Ramesh</dc:creator>
				<category><![CDATA[12. System Monitoring and Performance]]></category>

		<guid isPermaLink="false">http://linux.101hacks.com/?p=302</guid>
		<description><![CDATA[Linux kernel parameter can be changed on the fly using sysctl command. Sysctl helps to configure the Linux kernel parameters during runtime. # sysctl –a dev.cdrom.autoclose = 1 fs.quota.writes = 0 kernel.ctrl-alt-del = 0 kernel.domainname = (none) kernel.exec-shield = 1 net.core.somaxconn = 128 net.ipv4.tcp_window_scaling = 1 net.ipv4.tcp_wmem = 4096 16384 131072 net.ipv6.route.mtu_expires = 600 sunrpc.udp_slot_table_entries [...]]]></description>
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		<slash:comments>0</slash:comments>
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		<item>
		<title>Hack 98. Netstat Command Examples</title>
		<link>http://linux.101hacks.com/monitoring-performance/netstat-command-examples/</link>
		<comments>http://linux.101hacks.com/monitoring-performance/netstat-command-examples/#comments</comments>
		<pubDate>Wed, 30 Dec 2009 01:57:38 +0000</pubDate>
		<dc:creator>Ramesh</dc:creator>
				<category><![CDATA[12. System Monitoring and Performance]]></category>

		<guid isPermaLink="false">http://linux.101hacks.com/?p=300</guid>
		<description><![CDATA[Netstat command displays the network related information such as network connections, routing tables, interface statistics. Following are few examples on how to use netstat command. Display Active Internet Connections and domain sockets using netstat # netstat –an Active Internet connections (servers and established) Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 0.0.0.0:5666 [...]]]></description>
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		<slash:comments>2</slash:comments>
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		<title>Hack 97. vmstat Command Examples</title>
		<link>http://linux.101hacks.com/monitoring-performance/vmstat-command-examples/</link>
		<comments>http://linux.101hacks.com/monitoring-performance/vmstat-command-examples/#comments</comments>
		<pubDate>Wed, 30 Dec 2009 01:54:45 +0000</pubDate>
		<dc:creator>Ramesh</dc:creator>
				<category><![CDATA[12. System Monitoring and Performance]]></category>

		<guid isPermaLink="false">http://linux.101hacks.com/?p=298</guid>
		<description><![CDATA[For a typical performance monitoring all you need is only vmstat command. This display memory, swap, IO, system and cpu performance information. The following command executes vmstat every 1 second for 100 times. # vmstat 1 100 procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu---- r b swpd free buff cache si so bi bo in cs [...]]]></description>
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		<slash:comments>0</slash:comments>
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		<title>Hack 96. Sar Command Examples</title>
		<link>http://linux.101hacks.com/monitoring-performance/sar-command-examples/</link>
		<comments>http://linux.101hacks.com/monitoring-performance/sar-command-examples/#comments</comments>
		<pubDate>Wed, 30 Dec 2009 01:50:40 +0000</pubDate>
		<dc:creator>Ramesh</dc:creator>
				<category><![CDATA[12. System Monitoring and Performance]]></category>

		<guid isPermaLink="false">http://linux.101hacks.com/?p=295</guid>
		<description><![CDATA[Sar commands comes with the sysstat package. Make sure sysstat is installed. If you don’t have sar installed on your system, get it from Sysstat project. Sar is an excellent monitoring tool that displays performance data of pretty much every resource of the system including CPU, memory, IO, paging, networking, interrupts etc., Sar Collects, Reports [...]]]></description>
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		<slash:comments>0</slash:comments>
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		<title>Hack 95. lsof Command Examples</title>
		<link>http://linux.101hacks.com/monitoring-performance/lsof-command-examples/</link>
		<comments>http://linux.101hacks.com/monitoring-performance/lsof-command-examples/#comments</comments>
		<pubDate>Wed, 30 Dec 2009 01:48:03 +0000</pubDate>
		<dc:creator>Ramesh</dc:creator>
				<category><![CDATA[12. System Monitoring and Performance]]></category>

		<guid isPermaLink="false">http://linux.101hacks.com/?p=292</guid>
		<description><![CDATA[Lsof stands for ls open files, which will list all the open files in the system. The open files include network connection, devices and directories. The output of the lsof command will have the following columns: COMMAND process name. PID process ID USER Username FD file descriptor TYPE node type of the file DEVICE device [...]]]></description>
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		<slash:comments>0</slash:comments>
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		<title>Hack 94. Du Command Examples</title>
		<link>http://linux.101hacks.com/monitoring-performance/du-command-examples/</link>
		<comments>http://linux.101hacks.com/monitoring-performance/du-command-examples/#comments</comments>
		<pubDate>Wed, 30 Dec 2009 01:45:48 +0000</pubDate>
		<dc:creator>Ramesh</dc:creator>
				<category><![CDATA[12. System Monitoring and Performance]]></category>

		<guid isPermaLink="false">http://linux.101hacks.com/?p=290</guid>
		<description><![CDATA[du command (disk usage) will print the file space usage for a particular directory and its subdirectories. How much space is taken by my home directory and all its subdirectories? In the following example, option -s stands for summary only. i.e it displays only the total size of /home/jsmith and not the individual sizes of [...]]]></description>
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		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Hack 93. Kill Command Examples</title>
		<link>http://linux.101hacks.com/monitoring-performance/kill-command-examples/</link>
		<comments>http://linux.101hacks.com/monitoring-performance/kill-command-examples/#comments</comments>
		<pubDate>Wed, 30 Dec 2009 01:44:37 +0000</pubDate>
		<dc:creator>Ramesh</dc:creator>
				<category><![CDATA[12. System Monitoring and Performance]]></category>

		<guid isPermaLink="false">http://linux.101hacks.com/?p=287</guid>
		<description><![CDATA[kill command can be used to terminate a running process. Typically this command is used to kill processes that are hanging and not responding. Syntax: kill [options] [pids&#124;commands] How to kill a hanging process? First, identify the process id of the particular process that you would like to kill using the ps command. Once you [...]]]></description>
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		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Hack 92. Df Command Examples</title>
		<link>http://linux.101hacks.com/monitoring-performance/df-command-examples/</link>
		<comments>http://linux.101hacks.com/monitoring-performance/df-command-examples/#comments</comments>
		<pubDate>Wed, 30 Dec 2009 01:42:48 +0000</pubDate>
		<dc:creator>Ramesh</dc:creator>
				<category><![CDATA[12. System Monitoring and Performance]]></category>

		<guid isPermaLink="false">http://linux.101hacks.com/?p=285</guid>
		<description><![CDATA[df command (disk free) displays the amount of total and free disk space available on the mounted filesystems. Syntax: df [options] [name] How much GB of disk space is free on my system? Use df -h as shown below. Option -h displays the values in human readable format (for example: K for Kb, M for [...]]]></description>
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		<slash:comments>0</slash:comments>
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