System

VM disk performance on btrfs partition

Recently I read Alexandre Rosenfeld’s blog post about low performance of btrfs while placing VM’s disk on it, so I had a try and got almost the same result. I tried to have someone look into the problem, and now get the answer, quoting Bastian Blank : This is a result of the filesystem design, […]

Sending files from initramfs busybox

I have to say busybox is so cool! Today I did an installation of Debian Squeeze using daily netinst ISO image in an i686 qemu-kvm virtual machine. I was using ext4 for /boot, and btrfs for /. The installation process was quite normal as expected. After the installation I rebooted the virtual machine. Grub2 loaded […]

Work around of file name problem while unzip handling CJK encodings

Unzip 5.x has an option -O to specific the encoding of file names in an ZIP archive, but when 6.0 is arriving with unicode support, that option disappeared as well. CJK users need special cares on support and conversion of obsolete encoding while they are switching to utf-8. Here is my workaround about this problem, […]

Proposed PPA and key management enhancement for Ubuntu Tweak

Ubuntu Tweak is a magical tool for users to configure Ubuntu easier, it has a growing amount of users. I propose to make some enhancement to provide better PPA and key security. We need to have a GPG key pair to sign and verify texts to make sure the key hash list is credible. And […]

Differences among several kernel signals

Here is the final summary. Today I was fuzzied by the help content of the command ‘timeout’, as its name suggest, it a COMMAND, and kill it if still running after a specified period of time. Because of its termination action, I met something related to signals. Googled and finally make a summary here, that […]

This work by Aron Xu is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported.