linux boot sequence
 
1.load bios(hardware information)
2.read MBR's config to find out the OS
 
3.load the kernel of the OS
4.init process starts..
5.execute /etc/rc.d/sysinit
 
6.start other modules(etc/modules.conf)
7.execute the run level scripts 
(启动/etc/rc0.d或rc1.d或rc2.d……)
 
 
NFS:Network File System 
 
8.execute /etc/rc.d/rc.local
 
9.execute /bin/login
 
10.shell started..
 
bty: rc.d is the directory for all run control daemons.
 
daemons are system services, usually running in the background.
 
rc意即run commands,d是daemons的意思