Linux启动过程
- load bios 加电自检(hardware information)
- read mbr's config to out the os
- load the kernel of the os
- init process start (启动init进程)
- 启动/etc/rc.d(run command ,".d"表示精灵进程--服务器进程,在后台运行,进程看不见)
- start other 模块
- 运行run level scripts (important)
- 运行/etc/rc.d /rc.local(important)
- 运行/bin/login
- Shell start