This command sets up a few files.
这条命令设置了一些文件。
The first command sets a helpful variable.
第一条命令设置一个帮助变量。
P or --policy: This command sets a default target, i.e. policy, for a chain.
P或 --policy ：该命令设置链的缺省目标，即策略。
And I need to make sure I have a command that sets that up.
我想从哪儿开始呢？，我必须确认有个设置计数的命令。
And I need to make sure I have a command that sets that up.
我想从哪儿开始呢？，我必须确认有个设置计数的命令。
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