In Memoriam: 17 Tech Pioneers Who Died in 2011

In Memoriam: 17 Tech Pioneers Who Died in 2011

Posted by on December 29, 2011 · 0 Comment

Along with Steve Jobs and Dennis Ritchie, 2011 marked the passing of many computer visionaries and technology pioneers. The computing industry came of age in the 1950s, and many of the individuals who laid the groundwork for modern computing, smart electronics and the Internet are now in their 80s.
Filed in: Reviews
Resize root partition for a running EBS EC2 Instance

Resize root partition for a running EBS EC2 Instance

Posted by on December 24, 2011 · 2 Comments

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.
Filed in: System Tuning
vmtouch: File system cache diagnostics and control

vmtouch: File system cache diagnostics and control

Posted by on December 13, 2011 · 0 Comment

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.
Filed in: System Tuning
Lucene and Solr 3.5 Released

Lucene and Solr 3.5 Released

Posted by on December 12, 2011 · 0 Comment

The Lucene project management committee has announced the availability of Apache Lucene 3.5.0 and Apache Solr 3.5.0. Lucene is a high-performance, full-featured text search library. Solr is a standalone search server that uses Lucene at its core for indexing and search.
Filed in: Reviews
GSLB: How DNS-based one works

GSLB: How DNS-based one works

Posted by on December 11, 2011 · 0 Comment

GSLB is short for Global Server Load Balancing, and is a tried and tested way of improving the availability and speed of Internet-based services. GSLB enables distribution of traffic across multiple sites, manages disaster recovery, and ensures that applications are consistently accessible.
Filed in: Networking
Check Virtualization type for a running Linux

Check Virtualization type for a running Linux

Posted by on December 10, 2011 · 0 Comment

Are you running VPS as a hosting solution? And do you want to know what kind of virtualization is it running on? Is it OpenVZ, V-server, Xen or UML, and how can I confirm this?
Filed in: Virtualization
Nagios: Disable notifications from command line

Nagios: Disable notifications from command line

Posted by on December 3, 2011 · 0 Comment

With the commands below, Nagios can be controlled in command line mode. It’s helpful for your automation work. To disable notifications
Filed in: Reviews
Check HTTP header on multiple servers

Check HTTP header on multiple servers

Posted by on November 25, 2011 · 0 Comment

How can we dump the HTTP header for a specified URL? It’s not difficult since linux has such tools to do that, below is an example:
Filed in: Programming
Limit the size of Subversion commitment

Limit the size of Subversion commitment

Posted by on November 23, 2011 · 0 Comment

Has your subversion repository ever been abused by massive commitments? If not, I should say that you are lucky. Never mind that someday you might be abused as it’s hard to predict what the non-Ops are working on and trying to do.
Filed in: Applications, Programming
Regular expressions in Bash 3

Regular expressions in Bash 3

Posted by on November 22, 2011 · 0 Comment

Since version 3 which released in 2004, Bash acquired a regular expression operator “=~”, but I never noticed it, probably because grep sed or other commands works alternatively well. The regular expression is the same as egrep,  you can find more details from man egrep.
Filed in: Programming
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