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YUM: Download a RPM package without installation
Yum is commonly used in major RPM based Linux distributions such as CentOS, Redhat and SuSE, it can help us perform automatic dependency checking. If you’d like to only download the RPM packages via yum and do not install/update them, it’s nearly impossible by default.
Filed in: System Tuning
Nginx: UserAgent based transfer rate limit
In this post we’ll show an example on how to implement transfer rate limitation in Nginx. As this limitation is User agent based, it can be very meaningful for high transfer volume websites like download site, a mirror site like mirror.centos.org, etc.
Filed in: Applications, System Tuning
Rename a Vserver step by step
Suppose you made a mistake on the Vserver name when creating it. After finished the installation, you might want to rename your Vserver. This can be accomplished by renaming the config directory and the root for the vserver in question, then modifying some symlinks to match.
Filed in: System Tuning, Virtualization
Update CentOS 4 to CentOS 5 remotely
Posted by joseph on December 31, 2009 · 4 Comments
I just successfully updated my Dell PowerEdge 1850 from CentOS 4.8 to CentOS 5.4, luckily the issues I faced were not so rare. The steps I used are listed below, may it helpful for you as well! Although this post is mainly intended for CentOS it should work on RHEL systems as well.
Before you start, [...]
Filed in: Applications, System Tuning
Failover Firewalls with OpenBSD and CARP
Warning – this post was original created by Jason Dixon some yrs ago, its copyright is fully held by samag.com. I copied it here for a track record, If there’s any issue, please let me know. As the pictures in this post had lost already, it’s suggested to check its PDF version here.
Firewalls [...]
Filed in: Networking, System Tuning
Set timezone date and time in Linux
Your computer has two timepieces; a battery-backed one that is always running (a.k.a. the hardware, BIOS, or CMOS clock), and another that is maintained by the operating system currently running, it’s called system clock. This document explains how to set your system clock, your timezone, and other [...]
Filed in: Networking, System Tuning
Postfix: Manage transport mapping table
I have some web servers running for productive purpose, and they all have to send out mails. So a problem comes, how can I config mail forwardings for these servers with only internal network to send out mails to the public network?
Luckily it’s easy to implement with the help of either sendmail [...]
Filed in: Networking, System Tuning
Antispam: Understanding SPF records
Email is an extremely powerful and valuable tool for netizen, but only when used in the right way. As such we fully support measures that aim to defend users from unwanted emails.
One way to do this is by participating in the Sender Policy Framework (SPF), which is an open standard method of allowing [...]
Filed in: Security, System Tuning
13th Workshop on High Performance Transaction Systems
The 13th international workshop on HPTS held at October 25-28, 2009, Pacific Grove, CA. It’s all about real systems problems for real systems builders! The papers are listed at its official website. These papers are really really very informative, it’s suggested to have a read!
Every two [...]
Install Dell OMSA on Redhat Enterprise Linux
Here we listed 3 ways on the installation of Dell OpenManage Server Administrator on a Redhat Enterprise Linux, you can follows these steps on CentOS or SLES 10, they would work well.
1, Install from RPM packages
Generally we need these RPM packages, you can search and download them from Google.com.
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Web Hosting: Netcat really owns it's title: the swiss army knife!...
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Hassan: I have an E1A14 Errror. Im new to servers, kindly tell what is...
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joseph: Welcome Eric! Your website makes a lot of sense, thank you!...
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Eric Hammond: I've listed the commands necessary for each step in this article ...
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