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9个常用iptables配置实例 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...p --sport 22 -m state --state NEW,ESTABLISHED -j ACCEPT
类似的，对于HTTP/HTTPS(80/443)、pop3(110)、rsync(873)、MySQL(3306)等基于tcp连接的服务，也可以参照上述命令配置。
对于基于udp的dns服务，使用以下命令开启端口服务：
iptables -A OUTPUT -p ud...
What is thread safe or non-thread safe in PHP?
...Different web servers implement different techniques for handling incoming HTTP requests in parallel. A pretty popular technique is using threads -- that is, the web server will create/dedicate a single thread for each incoming request. The Apache HTTP web server supports multiple models for handlin...
How do I access properties of a javascript object if I don't know the names?
Say you have a javascript object like this:
8 Answers
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Should I use string.isEmpty() or “”.equals(string)?
I'm usually testing this alongside a string == null , so I'm not really concerned about a null-safe test. Which should I use?
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Is there an Eclipse line-width marker?
...to doubt them:
It has changed somehow in 2016: For details see [here] (https://bugs.eclipse.org/bugs/show_bug.cgi?id=495490#c2) You have to set it in the formatter: From menu [Window]-->[Preferences], select [Java]-->[Code Style]-->[Formatter], and then edit your formatter profile. In t...
HtmlEncode from Class Library
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Import System.Web
Or call the System.Web.HttpUtility which contains it
You will need to add the reference to the DLL if it isn't there already
string TestString = "This is a <Test String>.";
string EncodedString = System.Web.HttpUtility.HtmlEncode(TestString...
Sorting multiple keys with Unix sort
I have potentially large files that need to be sorted by 1-n keys. Some of these keys might be numeric and some of them might not be. This is a fixed-width columnar file so there are no delimiters.
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c++11 Return value optimization or move? [duplicate]
I don't understand when I should use std::move and when I should let the compiler optimize... for example:
4 Answers
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tmux set -g mouse-mode on doesn't work
I've been looking around and people say that putting
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CMake使用教程 - C/C++ - 清泛网 - 专注C/C++及内核技术
...试用一下。
准备活动：
（1）安装cmake。
下载地址：http://www.cmake.org/cmake/resources/software.html
根据自己的需要下载相应的包即可，Windows下可以下载zip压缩的绿色版本，还可以下载源代码。
（2）运行cmake的方法。（GUI、命令...