cygwin是一个在windows平台上运行的unix模拟环境，是cygnus solutions公司开发的自由软件。它对于学习unix/linux操作环境，或者从unix到windows的应用程序移植，或者进行某些特殊的开发工作，尤其是使用gnu工具集在windows上进行嵌入式系统开发，非常有用。-cygwin is a unix running on windows platform simulation environment is cygnus solutions developed by free software. It is for learning unix/linux operating environment, or from unix to windows applications transplant, or for some special development work, particularly the use of gnu tools on windows on development of embedded systems, very useful.