Saturday, June 11, 2011

The story of storage: hard disk

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Hard disk is a kind of storage that uses a concentric stack of disks or "platters" to record data. It is a block device, that say...

Cassandra-Setup

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Ref:-   http://ronaldbradford.com/ blog/tag/cassandra/         http://blog.evanweaver.com/ articles/2009/07/06/up-and- running-with-cassand...

"clocksource tsc unstable" solution

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cat /sys/devices/system/ clocksource/clocksource0/ available_clocksource Try these options with grub command line  clocksource=acpi_pm clo...

Configure TCP/IP from the Command Prompt Windows

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1. To  view your TCP/IP settings netsh interface ip show config 2. Configure your computer's IP address and other TCP/IP related sett...
Friday, June 10, 2011

Redhat Enterprise Linux Version 6 aka RHEL6 Features

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  Recently I attended one presentation from Redhat people on RHEL6 features. Some of the mesmerizing features as below. 85% more packages (...
Wednesday, June 1, 2011

Important Port Numbers Llinux System Administrator

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This is bit important post on understanding the ports, their details and numbers. Some FAQ related PORTS Q. What is a port? A port is softw...
Tuesday, May 17, 2011

YUM Configuration

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Features: 1. The ability to centralize packages (updates) Installation & Setup: 1. Install 'createrepo*rpm' 2. Setup direc...

RPM

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Features: 1. Provides package management a. Query b. Install c. Uninstall d. Upgrade e. Verify 2. Auto-verifies packages using GPG, M...

RAID

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Features: 1. The ability to increase availability and reliability of data Tasks: 1. Create a RAID-1 Device (/dev/md0..n) a. fdisk /dev...

Logical Volume Management (LVM)

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Features: 1. Ability to create volume sets and stripe sets 2. LVM masks the underlying physical technology (ATA,ATAPI,IDE,SCSI,SATA,PATA,...

Create Swap based on File

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Features: 1. The ability to provision swap space based on a file, similar to pagefile.sys in Windows NT, etc., if you have no available di...

Swap Partitions & Files

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Features: 1. Extra, virtual RAM for the OS Steps: 1. Identify current swap space a. swapon -s - enumerates partitions and/or files, w...

File Types - Permissions - Symlinks

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Features: 1. The ability to restrict/control access to files Note: 10 bits represent permissions for files (including directories) Not...