On the other hand , a properly configured ups can alert the system of the power outage and send telinit init the sigpwr signal , which will cause init to bring the system into single - user mode or shut the system down altogether , depending on how it s configured 另一方面,正确配置的ups可以提醒系统断电情况,并向telinit / init发送sigpwr信号,这会使init根据其配置情况将系统切换到单用户方式或者完全关闭系统。
Init level 0 is when the system is totally brought down and ready for power to be turned off . init level 1 is single - user mode without any network activity . init levels 2 and 3 are commonly used to run multi - user mode with network activity , and the state in which most machines run 级别0表示系统完全卸载可以关断电源;级别1则表示没有网络支持的单用户模式;级别2和3一般用作网络支持的多用户模式,也就是多数机器的运行模式。
Linux can be in several modes of operation : single - user mode , single - user with networking , multi - user mode , multi - user starting in x , etc . this section will explain the concept of a runlevel , what runlevels are available in slackware , and what they re called Linux可以有几种操作方式:单用户方式、单用户联网方式、多用户方式、始于x窗口的多用户方式,等等。这部分将要说明运行级别的概念、 slackware上有哪些运行级别,已经它们被叫作什么。