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	<title>Linux 101 Hacks &#187; 09. System Administration Tasks</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 75. Safe Reboot Of Linux Using Magic SysRq Key</title>
		<link>http://linux.101hacks.com/sysadmin-tasks/magic-sysrq-key/</link>
		<comments>http://linux.101hacks.com/sysadmin-tasks/magic-sysrq-key/#comments</comments>
		<pubDate>Tue, 29 Dec 2009 23:48:32 +0000</pubDate>
		<dc:creator>Ramesh</dc:creator>
				<category><![CDATA[09. System Administration Tasks]]></category>

		<guid isPermaLink="false">http://linux.101hacks.com/?p=243</guid>
		<description><![CDATA[The magic SysRq key is a key combination in the Linux kernel which allows the user to perform various low level commands regardless of the system’s state. It is often used to recover from freezes, or to reboot a computer without corrupting the filesystem. The key combination consists of Alt+SysRq+commandkey. In many systems the SysRq [...]]]></description>
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		<slash:comments>1</slash:comments>
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		<item>
		<title>Hack 74. Crontab Basic Guide</title>
		<link>http://linux.101hacks.com/sysadmin-tasks/crontab-basic-guide/</link>
		<comments>http://linux.101hacks.com/sysadmin-tasks/crontab-basic-guide/#comments</comments>
		<pubDate>Tue, 29 Dec 2009 23:43:53 +0000</pubDate>
		<dc:creator>Ramesh</dc:creator>
				<category><![CDATA[09. System Administration Tasks]]></category>

		<guid isPermaLink="false">http://linux.101hacks.com/?p=241</guid>
		<description><![CDATA[Using cron you can execute a shell-script or Linux commands at a specific time and date. For example a sysadmin can schedule a backup job that can run every day. How to add a job to the cron? # crontab –e 0 5 * * * /root/bin/backup.sh This will execute /root/bin/backup.sh at 5 a.m every [...]]]></description>
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		<slash:comments>0</slash:comments>
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		<title>Hack 73. Use ssh-copy-id along with ssh-agent</title>
		<link>http://linux.101hacks.com/sysadmin-tasks/ssh-copy-id-and-ssh-agent/</link>
		<comments>http://linux.101hacks.com/sysadmin-tasks/ssh-copy-id-and-ssh-agent/#comments</comments>
		<pubDate>Tue, 29 Dec 2009 23:39:20 +0000</pubDate>
		<dc:creator>Ramesh</dc:creator>
				<category><![CDATA[09. System Administration Tasks]]></category>

		<guid isPermaLink="false">http://linux.101hacks.com/?p=238</guid>
		<description><![CDATA[Using ssh-copy-id along with the ssh-add/ssh-agent When no value is passed for the option -i and If ~/.ssh/identity.pub is not available, ssh-copy-id will display the following error message. jsmith@local-host$ ssh-copy-id -i remote-host /usr/bin/ssh-copy-id: ERROR: No identities found If you have loaded keys to the ssh-agent using the ssh-add, then ssh-copy-id will get the keys from [...]]]></description>
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		<slash:comments>0</slash:comments>
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		<title>Hack 72. Setup SSH passwordless login in OpenSSH</title>
		<link>http://linux.101hacks.com/sysadmin-tasks/openssh-spasswordless-login/</link>
		<comments>http://linux.101hacks.com/sysadmin-tasks/openssh-spasswordless-login/#comments</comments>
		<pubDate>Tue, 29 Dec 2009 23:37:18 +0000</pubDate>
		<dc:creator>Ramesh</dc:creator>
				<category><![CDATA[09. System Administration Tasks]]></category>

		<guid isPermaLink="false">http://linux.101hacks.com/?p=236</guid>
		<description><![CDATA[You can login to a remote Linux server without entering password in 3 simple steps using ssky-keygen and ssh-copy-id as explained in this example. ssh-keygen creates the public and private keys. ssh-copy-id copies the local-host’s public key to the remote-host’s authorized_keys file. ssh-copy-id also assigns proper permission to the remote-host’s home, ~/.ssh, and ~/.ssh/authorized_keys. Step [...]]]></description>
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		<slash:comments>0</slash:comments>
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		<title>Hack 71. Create a new group and assign to an user</title>
		<link>http://linux.101hacks.com/sysadmin-tasks/assign-new-group-to-use/</link>
		<comments>http://linux.101hacks.com/sysadmin-tasks/assign-new-group-to-use/#comments</comments>
		<pubDate>Tue, 29 Dec 2009 23:34:34 +0000</pubDate>
		<dc:creator>Ramesh</dc:creator>
				<category><![CDATA[09. System Administration Tasks]]></category>

		<guid isPermaLink="false">http://linux.101hacks.com/?p=233</guid>
		<description><![CDATA[Create a new developer group. # groupadd developers Validate that the group was created successfully. # grep developer /etc/group developers:x:511: Add an user to an existing group.]]></description>
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		<slash:comments>0</slash:comments>
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		<title>Hack 70. Create a new user</title>
		<link>http://linux.101hacks.com/sysadmin-tasks/create-new-user-accoun/</link>
		<comments>http://linux.101hacks.com/sysadmin-tasks/create-new-user-accoun/#comments</comments>
		<pubDate>Tue, 29 Dec 2009 23:32:26 +0000</pubDate>
		<dc:creator>Ramesh</dc:creator>
				<category><![CDATA[09. System Administration Tasks]]></category>

		<guid isPermaLink="false">http://linux.101hacks.com/?p=231</guid>
		<description><![CDATA[Add a new user – Basic method Specify only the user name. # useradd jsmith Add a new user with additional Parameter You can also specify the following parameter to the useradd -c : Description about the user. -e : expiry date of the user in mm/dd/yy format # adduser -c "John Smith - Oracle [...]]]></description>
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		<slash:comments>0</slash:comments>
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		<title>Hack 69. Create a swap file system.</title>
		<link>http://linux.101hacks.com/sysadmin-tasks/create-swap-file-system/</link>
		<comments>http://linux.101hacks.com/sysadmin-tasks/create-swap-file-system/#comments</comments>
		<pubDate>Tue, 29 Dec 2009 23:28:57 +0000</pubDate>
		<dc:creator>Ramesh</dc:creator>
				<category><![CDATA[09. System Administration Tasks]]></category>

		<guid isPermaLink="false">http://linux.101hacks.com/?p=229</guid>
		<description><![CDATA[Create a file for swap usage as shown below. # dd if=/dev/zero of=/home/swap-fs bs=1M count=512 512+0 records in 512+0 records out # ls -l /home/swap-fs -rw-r--r-- 1 root root 536870912 Jan 2 23:13 /home/swap-fs Use mkswap to setup a Linux swap area in the /home/swap-fs file that was created above. # mkswap /home/swap-fs Setting up [...]]]></description>
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		<slash:comments>0</slash:comments>
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		<title>Hack 68. Fine tune the partition using tune2fs</title>
		<link>http://linux.101hacks.com/sysadmin-tasks/fine-tune-partition-using-tune2fs/</link>
		<comments>http://linux.101hacks.com/sysadmin-tasks/fine-tune-partition-using-tune2fs/#comments</comments>
		<pubDate>Tue, 29 Dec 2009 23:16:42 +0000</pubDate>
		<dc:creator>Ramesh</dc:creator>
				<category><![CDATA[09. System Administration Tasks]]></category>

		<guid isPermaLink="false">http://linux.101hacks.com/?p=227</guid>
		<description><![CDATA[Use the tune2fs –l /dev/sda1 to view the filesystem information as shown below. # tune2fs -l /dev/sda1 tune2fs 1.35 (28-Feb-2004) Filesystem volume name: /home/database Last mounted on: Filesystem UUID: f1234556-e123-1234-abcd-bbbbaaaaae11 Filesystem magic number: 0xEF44 Filesystem revision #: 1 (dynamic) Filesystem features: resize_inode filetype sparse_super Default mount options: (none) Filesystem state: not clean Errors behavior: Continue [...]]]></description>
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		<slash:comments>0</slash:comments>
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		<title>Hack 67. Mount the partition</title>
		<link>http://linux.101hacks.com/sysadmin-tasks/mount-the-partition/</link>
		<comments>http://linux.101hacks.com/sysadmin-tasks/mount-the-partition/#comments</comments>
		<pubDate>Tue, 29 Dec 2009 23:15:03 +0000</pubDate>
		<dc:creator>Ramesh</dc:creator>
				<category><![CDATA[09. System Administration Tasks]]></category>

		<guid isPermaLink="false">http://linux.101hacks.com/?p=225</guid>
		<description><![CDATA[After creating a partition and formatting, you can mount it to a mount point. Create a directory to mount First create a directory where the partition should be mounted. # mkdir /home/database Mount the file system. # mount /dev/sda1 /home/database Automatically mount filesystem To automatically mount the filesystem after the reboot, add the following entry [...]]]></description>
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		<slash:comments>0</slash:comments>
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		<title>Hack 66. Format a partition using mke2fsk</title>
		<link>http://linux.101hacks.com/sysadmin-tasks/format-a-partition-using-mke2fsk/</link>
		<comments>http://linux.101hacks.com/sysadmin-tasks/format-a-partition-using-mke2fsk/#comments</comments>
		<pubDate>Tue, 29 Dec 2009 23:12:45 +0000</pubDate>
		<dc:creator>Ramesh</dc:creator>
				<category><![CDATA[09. System Administration Tasks]]></category>

		<guid isPermaLink="false">http://linux.101hacks.com/?p=223</guid>
		<description><![CDATA[After partitioning the disks, it is still not ready for usage, as we need to format the disk. At this stage, if you try to view the disk information, it will give the following error message indicating that no valid superblock is present. # tune2fs -l /dev/sda1 tune2fs 1.35 (28-Feb-2004) tune2fs: Bad magic number in [...]]]></description>
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		<slash:comments>1</slash:comments>
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