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2008-04-27 14:07:55
系统运行级别有8种,分别为: 运行级别 意义 0 进入PROM状态(OK状态) 1 管理状态(所有文件系统都挂上的单用户模式,禁止其他用户登录) 2 多用户模式(没有网络文件共享服务) 3 多用户模式(有网络文件共享服务) 4 未使用 5 退出并关机 6 重新启动机器 S,s 单用户模式 init init命令用于改变操作系统的运行级别。 命令格式: init [ 0123456Ss ] # init 0 INIT: New run level: 0 The system is coming down. Please wait. System services are now being stopped. Print services stopped. Stopping the syslog service. syslogd: going down on signal 15 Aug 14 14:54:30 snmpdx: received signal 15 The system is down. syncing file systems... done Program terminated Type help for more information ok shutdown 用于改变操作系统运行级别。 命令格式: shutdown [ -y ] [ -g seconds ] [ -i init-state ] [message] 选项: y 系统提示时默认回答为YES g 过多长时间改变 i 想要的运行级别 message 给所有登录用户的信息 # shutdown -y -g 0 -i 0 Shutdown started. Mon Dec 15 15:13:57 PST 1997 Broadcast Message from root (console) on mcmurdo Mon Dec 15 15:13:57... THE SYSTEM IS BEING SHUT DOWN NOW ! ! ! Log off now or risk your files being damaged Changing to init state 0 - please wait ok halt 进入0运行级别 poweroff 关闭系统并切断电源 reboot 重新启动系统 |