- 0 停机
- 1 单用户,Does not configure network interfaces, start daemons, or allow non-root logins
- 2 多用户,无网络连接 Does not configure network interfaces or start daemons
- 3 多用户,启动网络连接 Starts the system normally.
- 4 用户自定义
- 5 多用户带图形界面
- 6 重启
- /etc/rc0.d Run level 0
- /etc/rc1.d Run level 1
- /etc/rc2.d Run level 2
- /etc/rc3.d Run level 3
- /etc/rc4.d Run level 4
- /etc/rc5.d Run level 5
- /etc/rc6.d Run level 6