在unix/linux获取cpu信息，cpu使用率，内存使用率，磁盘id这些信息，一般采用的方法是分析/proc文件，那些信息用程序分析比较麻烦，这儿推荐Procps工具。

procps is the package that has a bunch of small useful utilities that give information about processes using the /proc filesystem. The package includes the programs ps, top, vmstat, w, kill, free, slabtop, and skill.

Version 3 includes NPTL thread support, a rewritten top, many bug fixes, performance improvements, and new features.

Procps项目地址:http://procps.sourceforge.net/