There is a very impressive app from stand ford, namely vectormagic. It converts bitmaps into vector graphics. Vector graphics are made of geometries and can be enlarged or reduced and there won’t be any anti-alias effects. More importantly, I think it has an artistic effect which is very attractive. It’s just abstract enough to remove…
In my opinion, an easy to use distributed filesystem on Linux is long due. Today I came across XtreemFS which accomplishes just that. Setting up a basic cluster with 2 OSDs takes no more than 10 minutes. Let’s walk through the processes. First, install the binary packages using repositories made available by the XtreemFS team. Once…
There are a handful of version control tools for Linux but they were not designed to work with system config files. For example, RCS resets the file ownership and permission when a commit is made. This is when etckeeper comes into play. It works with a number of version control tools such as git and…
The program looks short but the way Python handles JSON is not very elegant. JSON is supposed to be a serialized object, so it should be processed as an object. But here, it’s processed as an array. [python] #!/usr/bin/python import json import sys print "Usage: cat JSON | BasicParse.py | column -t" jsonInput = sys.stdin…
I had to give it a try. This blog is now moved to AWS. There are a lot of cool features but they’re sort of expensive. For example, if I put the database on RDS and memcache on ElasticCache, it will cost me $140/mo. Come on, running yum -y install memcached is not worth $50…
There are times when updating to the latest minor release is not preferred, maybe a software compatibility issue or just plain stupidity. On RHEL 6.1 and beyond, one can utilzie the releasever parameter to lock the update to specific one. For example: yum –releasever=6.2 update But what about RHEL5.x? Redhat suggested mounting the corresponding ISO…