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Linux file copy benchmark cp vs cpio vs tar vs rsync
There are many commands to copy a directory in Linux. The difference between them in current Linux distribution are very small. All of them support link, time, ownership and sparse.I tested them to...
View ArticleLinux container LXC on Amazon EC2 server (Cloud inside Cloud)
Amazon AWS announced supporting pvgrub kernel a week ago. So it is possible to run your own kernel with new features like btrfs, cgroup, namespace, high resolution timers. Just be aware the AWS still...
View ArticleBoot grub2 stage2 directly from windows bootmgr with grub4dos stage1
There is problem which has been puzzled me for long time. When the grub2 root is on 2nd disk, the stage2 is not directly bootable from grub4dos stage1, but can be chain loaded from grub4dos as a linux...
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Integrate open graph with tumblr
Facebook Like button relies on Open Graph protocol to provide site information such as name, image and title.With tumblr‘s custom HTML theme, you can integrate open graph protocol in your theme. When...
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A Simple OpenID Login Example on Appengine
I wrote a simple openid login example. I used user api to do the real login. Here is source code. The idea is very simple. Instead of redirecting main page, I use javascript to popup a small page. Most...
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CloudFlare free cdn service
CloudFlare is a new cloud service which provides free website security and caching. A quick test revealed that it uses anycast geodns technology with nginx reverse caching.The setup process is very...
View ArticleAdd QR code to Tumblr Posts
It’s super simple to add a QR code to each Tumblr post. Just add this to anywhere between {block:posts} in your custom template.{block:posts} <img...
View ArticleSource address route with multiple IPv6 addresses
I always had ipv6 tunneling enabled on my server. One with he.net and one with 6to4. I never had any problems with them with either as a default route. Recently my server provider linode.com start...
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IPv6 Day
Today both google and facebook turn on their IPv6 addresses in their DNS servers for one day.C:\>ping www.google.com Pinging www.l.google.com [2001:4860:800c::93] with 32 bytes of data: Reply from...
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Using Ziproxy to block ads and save bandwidth
Recently AT&T ended unlimited wireless data plan for iphone and ipad and starbucks will offer free wifi. If you are an iphone or ipad user, you might be wondering how to save bandwidth and secure...
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