问题描述
此问题正在关注此问题：
This question is following this one: Sockets working in openSUSE do not work in Debian?
在Debian系统上使用套接字时，我必须使用nc -l -p port_number来模拟我想要的服务器和...谈谈如果我使用nc -l port_number，那么当使用套接字连接功能时，它会失败，而strerror（errno）会说Connection refused。
When working with sockets on my Debian system, I have to use nc -l -p port_number to simulate the server I want to talk with. If I'm using nc -l port_number, it will fail when using the socket connect function and strerror(errno) will say "Connection refused".
Netcat没有-p选项在其他Linux发行版上工作得很好，我应该在配置上改变什么？
Netcat without -p option is working great on other Linux distributions, what should I change on my configuration?
推荐答案
我同意，只需使用 -p 选项，但要回答您的问题：
I agree with duskwuff that it is better to just use the -p option everywhere, but to answer your question:
你必须做的一件事是安装一个支持你想要的语法的netcat。我知道 netcat-openbsd 包支持它。我知道 netcat-traditional 包不。还有一个 netcat6 包，也没有。然后，您可以明确请求OpenTCD版本的netcat，如下所示：
The one thing you have to do is install a netcat that supports the syntax you want. I know the netcat-openbsd package supports it. I know the netcat-traditional package does not. There's also a netcat6 package, which also doesn't. You can then explicitly request the OpenBSD version of netcat like so:
nc.openbsd -l 4242
可选地，您可以使用备用系统来设置此版本的netcat，以便在发布 nc 命令：
Optionally you may use the alternatives system to set this version of netcat to run when you issue the nc command:
update-alternatives --set nc /bin/nc.openbsd
如果这是您安装的唯一netcat，这将自动完成。
This will be done automatically for you if this is the only netcat you've installed.
最后，您可以再次选择删除不喜欢的网络摄像头（ netcat-traditional 或 netcat6 ）。
Finally, you may, again optionally, remove the netcat you don't like (netcat-traditional or netcat6).
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