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RHEL / CentOS Support 4GB or more RAM ( memory )

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If you have 4 GB or more RAM use the Linux kernel compiled for PAE capable machines. Your machine may not show up total 4GB ram. All you have to do is install PAE kernel package.

This package includes a version of the Linux kernel with support for up to 64GB of high memory. It requires a CPU with Physical Address Extensions (PAE).
The non-PAE kernel can only address up to 4GB of memory. Install the kernel-PAE package if your machine has more than 4GB of memory (>=4GB).


How to configure time server on CENTOS?

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How to configure time server on CENTOS?

yum install ntpd

Go to ntp.conf file

Vi /etc/ntp.conf

Define the pool as I live in Pakistan so I have to define the Asia pool in conf file like this





Last Updated on Wednesday, 15 February 2012 06:44

Squid Installation in Just 4 Easy Steps

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How to Install and configure Squid

1> Yum install squid
2> edit hostname in /etc/squid/squid.conf


3>Allow Network

acl our_networks src (e.g.,
http_access allow our_networks

4> Now we know squid by default port is 3128 uncomment the port in conf file of squid.

Restart the squid

Last Updated on Friday, 07 October 2011 13:04

Linux repository hit by malware attack

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linuxTakeaway: The Linux repository was rooted by a malware attack. While the breach goes under investigation, the websites for, Linux Foundation, and are down for maintenance.

A particularly ugly attack originating on drove the Linux Foundation and to close down its sites for maintenance. Here is part of the message posted on the Linux Foundation website:

Linux Foundation infrastructure including,, and their subdomains are down for maintenance due to a security breach that was discovered on September 8, 2011. The Linux Foundation made this decision in the interest of extreme caution and security best practices. We believe this breach was connected to the intrusion on

Last Updated on Wednesday, 14 September 2011 10:12

Goodbye Linux 2.6, Hello Linux 3.0

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linux3_01It's not every week a new major kernel version is released. This past week, the Linux Planet witnessed the Linux 3.0 release, the first major since the 2.6 kernel came out in 2003. It's a number change that has more to do with history than technology, but it is a significant milestone nonetheless.

In many open source software projects a major version change signifies a major change in an application, often one that changes binary compatibility; that's not the case with Linux 3.0.

Linux 3.0 is a numerical change because Linus Torvalds decided it was time to move away from 2.6.x, as the version numbers were getting too big. The last 2.6.x release was the 2.6.39 release that came out in May.

Last Updated on Wednesday, 27 July 2011 09:00

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