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How do you add swap to an EC2 instance?
...ance is using swap using this command
cat /proc/meminfo
result:
ubuntu@ip-172-31-24-245:/$ cat /proc/meminfo
MemTotal: 604340 kB
MemFree: 8524 kB
Buffers: 3380 kB
Cached: 398316 kB
SwapCached: 0 kB
Active: 165476 kB
Inactive: 3...
Android Debug Bridge (adb) device - no permissions [duplicate]
...do not need adb to as root. To make things easier you can create a bash script and run that with sudo
– Leon
May 10 '13 at 12:19
2
...
Rails 4: List of available datatypes
...also take advantage of these:
:hstore
:json
:jsonb
:array
:cidr_address
:ip_address
:mac_address
They are stored as strings if you run your app with a not-PostgreSQL database.
Edit, 2016-Sep-19:
There's a lot more postgres specific datatypes in Rails 4 and even more in Rails 5.
...
Are HTTPS URLs encrypted?
...s information to facilitate secure
connections to servers that host multiple 'virtual' servers at a
single underlying network address.
In order to provide the server name, clients MAY include an
extension of type "server_name" in the (extended) client hello.
In short:
FQDN (the domain ...
一文讲透区块链技术原理 - 资讯 - 清泛网 - 专注C/C++及内核技术
...留存价值需要满足哪些附加条件。通常，发送价值到目标地址的脚本，要求价值的持有人提供以下两个条件，才能使用自己之前收到的价值：一个公钥，以及一个签名（证明价值的持有者拥有与上述公钥相对应的私钥）。脚本的...
How do I find out which computer is the domain controller in Windows programmatically?
I am looking for a way to determine what the Name/IP Address of the domain controller is for a given domain that a client computer is connected to.
...
App Inventor 2 列表代码块 · App Inventor 2 中文网
...= new QRCode("qrcode", { text: window.location.href + "?f=share", //URL地址 width: 150, height: 150, colorDark: '#000000', //二维码颜色 colorLight: "#ffffff" //背景颜色}); App Inventor 2 中文网 MIT同步更新的中文本土化 积木式在线App开发平台！ ...
Java URL encoding of query string parameters
...tring urlStr = "http://www.example.com/CEREC® Materials & Accessories/IPS Empress® CAD.pdf"
URL url= new URL(urlStr);
URI uri = new URI(url.getProtocol(), url.getUserInfo(), url.getHost(), url.getPort(), url.getPath(), url.getQuery(), url.getRef());
Then convert that Uri to ASCII string:
ur...
What is the Difference Between read() and recv() , and Between send() and write()?
...
The difference is that recv()/send() work only on socket descriptors and let you specify certain options for the actual operation. Those functions are slightly more specialized (for instance, you can set a flag to ignore SIGPIPE, or to send out-of-band messages...).
Functions read()/wr...
【App Inventor 2 数据可视化】使用柱状图和饼图收集数据 - App应用开发 - ...
...thread-316532-1-1.html
文章aia源码如下：
[hide][/hide]
资源地址：https://drive.google.com/drive/f ... 0BGKOaa?usp=sharing（如打不开可以直接在附件中下载）
数据在行动1：使用柱状图和饼图收集数据跟踪我的情绪这个渐进式的指南告诉你...