linux usage & development

http://jmason.org/software/sitescooper/tao_regexps.html

http://net.pku.edu.cn/~yhf/tao_regexps_zh.html

http://jiaoshi.gjjblog.com/archives/904332/

http://jiaoshi.gjjblog.com/archives/904332/

• const_cast removes const, volatile or __unaligned attributes
• dynamic_cast must be transforming into a pointer or a reference to a class, or void pointer
• static_cast is for transforming into a superclass pointer or reference, or between non-class (i.e., basic data) types or void pointers
• reinterpret_cast can be used for everything

WIN32 API tutorial and preferences

http://msdn2.microsoft.com/en-us/library/aa139672.aspx

LinuxSir论坛graydream个人理解：

1. GPL、LGPL和盈利无关，无论如何情况你都可以收费，但必须遵守下一条原则
2. 基于别人以GPL许可发放的代码而写的程序，发放时必须公开你自己的代码；
   基于别人以LGPL许可发放的代码而写的程序，发放时可以不公开你自己的代码

关于各编译器、库、环境比较全的一篇文章：http://blog.csdn.net/ugg/archive/2007/03/07/1523379.aspx

Dev-C++、GTK+、MinGW的使用：http://blog.csdn.net/kxy/archive/2004/08/22/81270.aspx

免费编译器、库、环境的列表及链接：http://www.blogjava.net/bluesky/archive/2006/04/24/42832.aspx

platform	windows	<-	<-	cross-platform
IDE	visual studio	Borland C++ Builder	Dev-C++	Ultimate++, Emacs...
compiler	VC++...	Borland C++	GCC Complier	GNU C++ based MingGW, Cygwin...
library	MFC		GTK+, Qt, WxWindows, Fox...	<- (Ultimate++ has its own libraries)

As I capture SIP packets there often are heartbeat UDP messages (UDP content = 4 bytes, whole packet = 46) captured. Here's a sample capture filter, udp port 5060 and greater 50

安装一个包 rpm -ivh  
升级一个包 rpm -Uvh  
查询一个包是否被安装 rpm -q < rpm package name> 
得到被安装的包的信息 rpm -qi < rpm package name> 
列出该包中有哪些文件 rpm -ql < rpm package name> 
列出一个文件属于哪一个RPM包 rpm -qf 
可综合好几个参数一起用 rpm -qil < rpm package name> 
列出所有被安装的rpm package rpm -qa  
列出一个未被安装进系统的RPM包文件中包含有哪些文件 rpm -qilp < rpm package name>

to display (current) dir's disk size,

du -sh

s: show summary only, without any sub-directories
h: human-readable
a: show files, too