http://www.ibm.com/developerworks/cn/linux/l-k26initrd/index.html
http://www.68idc.cn/help/server/linux/20150707426047.html
http://www.ibm.com/developerworks/cn/linux/l-bootload.html
bootloader,kernel,initrc
原文：http://www.cnblogs.com/SZLLQ2000/p/5296508.html
