linux系统引导流程
Sun Jan 15 19:26:50 PST 2012
[root@localhost test]# hwclock
Sun 15 Jan 2012 07:26:58 PM PST -0.997218 seconds
[root@localhost test]# hwclock --systohc
[root@localhost test]# date
Sun Jan 15 19:27:41 PST 2012
[root@localhost test]# hwclock
Sun 15 Jan 2012 07:27:48 PM PST -0.322978 seconds
[root@localhost test]#
内核 kernel
内核只有两个作用,载入驱动程序,驱动硬件
启动进程init (很重要的进程 ,其PID)始终为1
# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE: You have a /boot partition. This means that
# all kernel and initrd paths are relative to /boot/, eg.
# root (hd0,0)
# kernel /vmlinuz-version ro root=/dev/sda2
# initrd /initrd-version.img
#boot=/dev/sda
default=0
timeout=5
splashimage=(hd0,0)/grub/splash.xpm.gz
hiddenmenu
title CentOS (2.6.18-194.32.1.el5)