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tcp端口状态ESTABLISHED、TIME_WAIT、CLOSE_WAIT 、SYN_RECV等详解 - C/C++...
...件，加入以下内容：
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_tw_recycle = 1
net.ipv4.tcp_fin_timeout = 30
然后执行 /sbin/sysctl -p 让参数生效。
net.ipv4.tcp_syncookies = 1 表示开启SYN Cookies。当出现SYN等待队列溢出时，启用coo...
Why can't I stop vim from wrapping my code?
...
'textwidth' 'tw' number (default 0)
local to buffer
{not in Vi}
Maximum width of text that is being inserted. A longer line will be
broken after white space...
Two inline-block, width 50% elements wrap to second line [duplicate]
...move the white-space between the div's it works as expected. Live Example: http://jsfiddle.net/XCDsu/4/
<div id="col1">content</div><div id="col2">content</div>
share
|
imp...
What is the performance cost of having a virtual method in a C++ class?
... The cost in cycles is roughly equal to the number of pipeline stages between fetch and the end of the branch-retire. It's not an insignificant cost, and it can add up, but unless you're trying to write a tight high-performance loop there are probably bigger perf fish for you to fry.
...
Open existing file, append a single line
...
Might want to check out the TextWriter class.
//Open File
TextWriter tw = new StreamWriter("file.txt");
//Write to file
tw.WriteLine("test info");
//Close File
tw.Close();
...
Download file from web in Python 3
...d the response of urllib.request.urlopen:
import urllib.request
...
url = 'http://example.com/'
response = urllib.request.urlopen(url)
data = response.read() # a `bytes` object
text = data.decode('utf-8') # a `str`; this step can't be used if data is binary
The easiest way to download and sav...
animating addClass/removeClass with jQuery
...s to provide the animation and jQuery to change the classes. Live example: http://jsfiddle.net/tw16/JfK6N/
#someDiv{
-webkit-transition: all 0.5s ease;
-moz-transition: all 0.5s ease;
-o-transition: all 0.5s ease;
transition: all 0.5s ease;
}
...
List of All Locales and Their Short Codes?
...
From http://www.w3.org/International/articles/language-tags/
"Language tag syntax is defined by the
IETF's BCP 47. BCP stands for 'Best
Current Practice', and is a persistent
name for a series of RFCs whose
numbers cha...
Linux下部署企业级邮件服务器(postfix + dovecot + extmail) - 开源 & Gith...
...uery OK, 0 rows affected (0.00 sec)
3、安装配置apache
yum install httpd -y
vim /etc/httpd/conf/httpd.conf
注释掉中心主机，启用虚拟主机
添加以下内容：
<VirtualHost *:80>
ServerName mail.huatuo.com
DocumentRoot /var/www/extmail/html/
ScriptA...
Http长连接200万尝试及调优 - 更多技术 - 清泛网 - 专注C/C++及内核技术
Http长连接200万尝试及调优对于一个server，我们一般考虑他所能支撑的qps，但有那么一种应用， 我们需要关注的是它能支撑的连接数个数，而并非qps，当然qps也是我们...对于一个server，我们一般考虑他所能支撑的qps，但有那么一...