Crucial Paradigm

This article describes how to configure a new partition from free space on a dedicated server, or a virtual machine with full virtualization (such as VMware or XenServer):

1. Verify the partitions available on the server: fdisk -l
2. Choose which device you wish to use (such as /dev/sda or /dev/sdb)
3. Run fdisk /dev/sdX (where X is the device you would like to add the partition to)
4. Type ‘n’ to create a new partition.
5. Specify where you would like the partition to end and start.  You can set the number of MB of the partition instead of the end cylinder.  For example:  +1000M
6. Type ‘p’ to view the partition, and type ‘w’ to save the partition
7. Run the command ‘partprobe’ to have the OS detect the new partition table.  If it still does not detect the partition table, you might need a reboot.
8. Format the partition by doing:  ‘mke2fs -j /dev/sdaX’ – where X is the number of the partition you have created.
9. Create a directory where you wish to mount the new drive, for example: /newpartition.  ‘mkdir -p /newpartition’
10. To mount, you can use the following command: ‘mount /dev/sdaX /newpartition’
11. If you would like the drive to be mounted automatically each time you boot, add the following to /etc/fstab: ‘/dev/sdaX /newpartition ext3 defaults 1 2′

Make sure you have backups before you perform any formatting, or creating new partitions!

This is a the quick easy way to get lmsensors installed on your server (without having to compile kernel modules, etc):

1. Run: yum install sensor
2. Run: sensors-detect (to configure sensor automatically)
3. Run: restart senors
4. sensors

With lm_sensors you can view system temperature, fan speeds, voltages, etc.  Its a great way to monitor some of the finer aspects of your server.

Its an old article, but very fun nonetheless.  Came across it a few days, and had be laughing for ages: http://www.centos.org/modules/news/article.php?storyid=127