Posted by joseph on August 30, 2013 ·
How can we create a USB Memory Stick for Debian 7.1 (Wheezy) installation?
Well, it’s very easy compared to my thought. It takes several minutes to create a USB memory stick to install either Debian i386 or AMD-64. Here our example is i386 based.
Firstly we need a USB memory stick with a minimal [...]
Posted by joseph on August 9, 2013 ·
Following is a process to flush DNS cache in Windows, Linux or Mac Machines. We will soon create another post on how to flush DNS cache in browsers.
Posted by joseph on July 3, 2013 ·
As Debian v7.0 Wheezy has been released for a while, we will show how to upgrade from v6.0 Squeeze here step by step.
Before any operations, it’s highly suggested making a backup, as least for data files and configuration files of your major applications.
Basically the upgrade is kind of easy as [...]
Posted by joseph on February 24, 2013 ·
As system administrators, we’d better know SystemTap and be able to assemble its existed recipes for comprehensive system analysis. When I am on my way to make a collection of systemtap scripts, I realize that I should give a brief introduction to this powerful design first, although it has been [...]
Posted by joseph on August 23, 2012 ·
Note that this is a forwarded version from serverfault.com, and the original post is here.
Xen is an hypervisor that runs on metal (the pc / server) and then hosts virtual machines called domains.
Posted by joseph on June 30, 2012 ·
You may have heard of Netperf, which is a benchmark tool that is used to measure the performance of many different types of networking. But normally what we care are the throughput and latency. As the throughput may affected by different factors like the package size, you may have to run many tests [...]
Posted by joseph on May 10, 2012 ·
As from OpenSSH-4.4, we can add command-line args for the sftp-server subsystem configuration. When combined with these arguments, it allows us to log what is performing during an SFTP session. Be aware that there is a bug in enabling the logging feature if you use it with ForceCommand, and affects versions prior [...]
Posted by joseph on December 24, 2011 ·
As long as you are all right with a little downtime of the EC2 instance (in a few minutes), it is possible to extend the root partition on a running EBS boot EC2 instance, without needing to start a new instance.
Posted by joseph on December 13, 2011 ·
From the topic above, you may have remembered one of our former post “what data is cached by operation system“. This is a similar tool as Fincore, but it’s more powerful. It’s written in C and supports UNIX and unix-like systems.
Posted by joseph on August 3, 2011 ·
When using Amazon S3 to store the web files, you may face this question sometimes,
How can I keep the files for my productive environment exactly the same as develop environment? (In other words, you want to remove the unused files in dev environment.)