Learning to work with the Linux services and run levels is key to successful troubleshooting.
学习并掌握Linux服务和运行级别是成功解决问题的关键。
Processes in these run levels that are not running will be executed, but processes from the previous run level are not touched.
那些处于这些运行级别并且未运行的进程将开始执行，但是处于之前运行级别的进程保持不变。
The /etc/rc.d directory structure can be used to put in S and K files at the various run levels listed to bring up or down processes.
可以使用 /etc/rc.d目录结构在列出的各个运行级别上放入S和K文件，以启用或停止进程。
These are based on the concept of UNIX run levels; the system starts at level one, and then monotonically increments until it hits the target start level.
这一概念是基于UNIX运行级别的概念：系统以级别1启动，然后单调递增，直到达到目标启动级别。
These are based on the concept of UNIX run levels; the system starts at level one, and then monotonically increments until it hits the target start level.
这一概念是基于UNIX运行级别的概念：系统以级别1启动，然后单调递增，直到达到目标启动级别。
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