通信录源码，shell编程实例。将tar包上传至linux服务器后，tar zxvf txl.tar.gz,即可解压。-communications recorded source, shell programming examples. Tar packets will upload to Linux servers, tar zxvf txl.tar.gz can be unpacked.

linux的shell模拟，包含常用命令，源码可编译。-Linux shell simulation, including the commonly used commands, source code can be compiled.

shell解释器自行编写，有源码，有Makefile，有说明，在Linux下运行，C语言代码-shell interpreter to write your own, there is source code, Makefile, a note, run under Linux, C language code