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Java内存泄露原因详解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...4、各种连接
比如数据库连接（dataSourse.getConnection()），网络连接(socket)和io连接，除非其显式的调用了其close（）方法将其连接关闭，否则是不会自动被GC 回收的。对于Resultset 和Statement 对象可以不进行显式回收，但Connection 一...
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
...
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...
中文网（自研/维护）拓展 · App Inventor 2 中文网
...表展示
MyListViewElement：自定义列表展示项
NetworkState：网络状态
NotificationStyle：个性化通知栏样式
PhoneInfo：获取手机等设备软硬件、版本等相关信息
SQLite：超流行兼容主流SQL语法的迷你本地数据库引擎
Screenshot：手机...
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...
ssh: Could not resolve hostname [hostname]: nodename nor servname provided, or not known
...I had already:
installed and tested ssh on my home network.
Set a static IP for my pi.
Set up a Dynamic DNS service and installed the software on my pi.
I referenced these instructions for setting up the static ip, and there are many more instructional resources out there.
Also, I set up port f...
Eclipse RCP Plug-in开发自学教程（Eclipse3.6） - 文档下载 - 清泛网 - ...
...自学教程（Eclipse3.6） Eclipse RCP Plug-in本教程素材来源于网络，经过本人的整理、添加以及部分的重写，将原有的Eclipse3.3版本的一些内容完全迁移到Eclipse3.6版本上来。基于开源以...本教程素材来源于网络，经过本人的整理、添加...