Category Archives: Operating Systems

Create Your Own Web Server With BIND And Apache On CentOS 5 (Simplified)

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Installing necessary packages

yum install bind bind-chroot bind-libs bind-utils caching-nameserver -y

After installing the necessary packages you are ready to start configuring named.conf. You may check and see that there is no named.conf in your /etc/ directory in Centos 5. No worries here you can see a sample named.conf file. Now create the file /etc/named.conf and copy/paste the content of the sample config file – just make sure you replace website.com with your own domain name.

via Create Your Own Web Server With BIND And Apache On CentOS 5 (Simplified) | HowtoForge – Linux Howtos and Tutorials.

Centos making things difficult again.

Protecting a Laptop from Simple and Sophisticated Attacks

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Some people might say that many of these precautions are over the top and paranoid. I don’t consider myself an “elite hacker”, but I know that I could pull off most of the attacks that I’ve discussed above without much trouble. Cold boot and Evil maid are practical, easy to pull off, attacks. Why wouldn’t I defend against them?

via Protecting a Laptop from Simple and Sophisticated Attacks | Mike Cardwell, Online.

Device eth0 does not seem to be present error after cloning a linux machine

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After some searching, i found out that there is a device manager for the Linux kernel named “udev” which remembers the settings from the NIC of the virtual machine before it was cloned. To fix the issue simply delete the the following file and it will be regenerated properly on reboot.

/etc/udev/rules.d/70-persistent-net.rules

via Random IT Stuff » ‘Device eth0 does not seem to be present’ error after cloning a linux machine.

This worked for me with a VirtualBox clone that was giving me problems.  Google is simply an amazing resource!  And kudos to the linked site for coming up first with a no nonsense answer.

Linux Server Cluster for Load Balancing

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The Linux Virtual Server is a highly scalable and highly available server built on a cluster of real servers, with the load balancer running on the Linux operating system. The architecture of the server cluster is fully transparent to end users, and the users interact as if it were a single high-performance virtual server. For more information, click here.

via The Linux Virtual Server Project – Linux Server Cluster for Load Balancing.

Linux Virtual Server Tutorial

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The Linux Virtual Server Project (LVS) allows load balancing of networked services such as web and mail servers using Layer 4 Switching. It is extremely fast and allows such services to be scaled to service 10s or 100s of thousands of simultaneous connections. The purpose of this tutorial is to demonstrate how to use various features of LVS to load balance Internet services, and how this can be made highly available using tools such as such as heartbeat and keepalived. It will also cover more advanced topics which have been the subject of recent development including maintaining active connections in a highly available environment and using active feedback to better distribute load.

Via Linux Virtual Server Tutorial.

Set up a Web server cluster in 5 easy steps

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This article illustrates the robust Apache Web server stack with 6 Apache server nodes (though 3 nodes is sufficient for following the steps outlined here) as well as 3 Linux Virtual Server (LVS) directors. We used 6 Apache server nodes to drive higher workload throughputs during testing and thereby simulate larger deployments

via Set up a Web server cluster in 5 easy steps.

How Linux mastered Wall Street

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Others just use off-the-shelf distributions and pay consultants to tweak the settings for maximum performance. Red Hat Enterprise Linux is now the dominant Linux distribution among exchanges, Lameter said. Red Hat counts among its customers the Chicago Mercantile Exchange, New York Mercantile Exchange, Frankfurt Stock Exchange, Eurex derivative exchange and Philippine Stock Exchange.

via How Linux mastered Wall Street | ITworld.