kernel panic – not syncing: VFS: Unable to mount root fs on unknown-block(0,0) while booting

在一次升级阿里云服务器内核后，重新启动服务遇到了这个问题，经过对比grub.conf文件发现丢失了一个内存盘文件系统，也就是(/boot/initramfs-2.6.32-431.23.3.el6.x86_64.img)类似的文件。

VFS: Unable to mount root fs on unknown wn-block(0,0)

参考文档：
1：http://blog.csdn.net/djinglan/article/details/7295442
2：https://stackoverflow.com/questions/15214461/ubuntu-10-0-4-gives-kernel-panic-not-syncing-vfs-unable-to-mount-root-fs-on
3：http://blog.csdn.net/wuyao721/article/details/4715771
4：https://stackoverflow.com/questions/17242403/linux-running-self-compiled-kernel-in-qemu-vfs-unable-to-mount-root-fs-on-unkSourceByrd's Weblog-https://note.t4x.org/error/vfs-unable-to-mount-root/ SourceByrd's Weblog-https://note.t4x.org/error/vfs-unable-to-mount-root/