centos6启动流程是什么

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[[email protected] ~]# ls -ld /etc/rc*

lrwxrwxrwx.  1 root root    7 Mar 13  2018 /etc/rc -> rc.d/rc

lrwxrwxrwx.  1 root root   10 Mar 13  2018 /etc/rc0.d -> rc.d/rc0.d

lrwxrwxrwx.  1 root root   10 Mar 13  2018 /etc/rc1.d -> rc.d/rc1.d

lrwxrwxrwx.  1 root root   10 Mar 13  2018 /etc/rc2.d -> rc.d/rc2.d

lrwxrwxrwx.  1 root root   10 Mar 13  2018 /etc/rc3.d -> rc.d/rc3.d

lrwxrwxrwx.  1 root root   10 Mar 13  2018 /etc/rc4.d -> rc.d/rc4.d

lrwxrwxrwx.  1 root root   10 Mar 13  2018 /etc/rc5.d -> rc.d/rc5.d

lrwxrwxrwx.  1 root root   10 Mar 13  2018 /etc/rc6.d -> rc.d/rc6.d

drwxr-xr-x. 10 root root 4096 Feb 18 02:17 /etc/rc.d

lrwxrwxrwx.  1 root root   13 Mar 13  2018 /etc/rc.local -> rc.d/rc.local

lrwxrwxrwx.  1 root root   15 Mar 13  2018 /etc/rc.sysinit -> rc.d/rc.sysinit

[[email protected] ~]# ls /etc/rc.d/

init.d  rc0.d  rc2.d  rc4.d  rc6.d     rc.sysinit

rc      rc1.d  rc3.d  rc5.d  rc.local

[[email protected] ~]# diff -ruNa /etc/rc.d/init.d/ /etc/init.d/

(1)./etc/inittab文件

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[[email protected] ~]# cat /etc/inittab

# inittab is only used by upstart for the default runlevel.

#

# ADDING OTHER CONFIGURATION HERE WILL HAVE NO EFFECT ON YOUR SYSTEM.

#

# System initialization is started by /etc/init/rcS.conf

#

# Inpidual runlevels are started by /etc/init/rc.conf

#