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Best way to simulate “group by” from bash?
Suppose you have a file that contains IP addresses, one address in each line:
14 Answers
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Increasing the maximum number of TCP/IP connections in Linux
... decrease the tcp_fin_timeout
To find out the default values:
sysctl net.ipv4.ip_local_port_range
sysctl net.ipv4.tcp_fin_timeout
The ephermal port range defines the maximum number of outbound sockets a host can create from a particular I.P. address. The fin_timeout defines the minimum time thes...
Enable remote MySQL connection: ERROR 1045 (28000): Access denied for user
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You have to put this as root:
GRANT ALL PRIVILEGES ON *.* TO 'USERNAME'@'IP' IDENTIFIED BY 'PASSWORD' with grant option;
;
where IP is the IP you want to allow access, USERNAME is the user you use to connect, and PASSWORD is the relevant password.
If you want to allow access from any IP just p...
How can I programmatically get the MAC address of an iphone
How to programmatically get an iPhone's MAC address and IP address?
12 Answers
12
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Heroku/GoDaddy: send naked domain to www [closed]
...completely free. You just point your A record for the naked domain to that IP address and it will redirect the browser to the www domain. You don't even need an account with them.
– P O'Conbhui
May 4 '13 at 0:48
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What is the difference between 127.0.0.1 and localhost
...27.0.0.1, then (intelligent) software will just turn that directly into an IP address and use it. Some implementations of gethostbyname will detect the dotted format (and presumably the equivalent IPv6 format) and not do a lookup at all.
Otherwise, the name has to be resolved. And there's no guaran...
刘强东“一元年薪”背后的O2O棋局 - 资讯 - 清泛网 - 专注C/C++及内核技术
...影响。
8月7日，京东发布了2015年第二季度财报。据财报显示，虽然京东第二季度交易总额为1145亿元，同比增长82%，净收入则达到459亿元，同比增长61%。
尽管京东业绩增长强劲，但其似乎还没有找到有效的盈利模式。
在去年...
BMP 和 DIB - C/C++ - 清泛网 - 专注C/C++及内核技术
...以前）中是很普遍的，事实上它也是唯一的。然而，随着显示器制造技术的进步，以及显示设备的多样化，DDB位图的一些固有的问题开始浮现出来了。比如，它不能够存储（或者说获取）创建这张图片的原始设备的分辨率，这样...
MFC 时间控件CDataTimeCtrl使用（获取日期、时间字符串等） - C/C++ - 清泛...
...间控件CDataTimeCtrl使用（获取日期、时间字符串等）设置显示格式： 只显示小时( (CDateTimeCtrl*)GetDlgItem(IDC_StartHour) )->SetFormat(_T("HH"));获取控件的值：CTime m_date;( (CDa...设置显示格式：
//只显示小时
( (CDateTimeCtrl*)GetDlgItem(IDC_StartHou...
强烈推荐一款非常mini的代码高亮开源软件--prism - 开源 & Github - 清泛网...
...源码修改难度、代码复制纯度等等。目前各主流技术网站显示代码大多都采用了格式化高亮显示，有的甚至对不同编程语言的不同关键字作了高亮处理。
但是比如下面这种就有点让人哭笑不得了，复制代码竟然还附带了行号！...