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com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
...achable at all. This can have one or more of the following causes:
IP address or hostname in JDBC URL is wrong.
Hostname in JDBC URL is not recognized by local DNS server.
Port number is missing or wrong in JDBC URL.
DB server is down.
DB server doesn't accept TCP/IP connections.
D...
What can be the reasons of connection refused errors?
...king for firewalls and that the port is open, use telnet to connect to the ip/port to test connectivity. This removes any potential issues from your application.
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HTTP test server accepting GET/POST requests
...ttps://httpbin.org/anything Returns most of the below.
https://httpbin.org/ip Returns Origin IP.
https://httpbin.org/user-agent Returns user-agent.
https://httpbin.org/headers Returns header dict.
https://httpbin.org/get Returns GET data.
https://httpbin.org/post Returns POST data.
https://httpbin.o...
Connect to a locally built Jekyll Server using mobile devices in the LAN
...e command line.
That will make Jekyll's HTTP server bind to all available IPs, rather than just to localhost.
You can also add this to your _config.yml with host: 0.0.0.0. GitHub will simply ignore this when you push, so it's safe to use if you don't mind having your work openly accessible on your...
How do I simulate a low bandwidth, high latency environment?
... instructions, you're enabling a firewall. For just simulating a different IP connection, you could (for example) do the following:
Create a file /etc/rc.firewall.56k which contains the following:
ipfw add pipe 1 ip from any to any out
ipfw add pipe 2 ip from any to any in
ipfw pipe 1 config b...
Get hostname of current request in node.js Express
... be no way to detect the actual host without a request, you could have multiple hosts configured, but this is what I was looking for!
– Jesse
Sep 22 '11 at 0:38
2
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How do I copy a folder from remote to local using scp? [closed]
...ound: the -C flag adds compression and the -c flag lets you pass in other cipher types for better performance, like scp -c blowfish a@b:something . as seen in dimuthu's answer
– Automatico
Jun 26 '14 at 20:48
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App Inventor 2 TaifunImage 拓展，图像高级处理功能，剪裁，压缩，翻转等 ...
...片缩放并Base64化
用于基本图像处理的图像扩展。
所需权限：android.permission.READ_EXTERNAL_STORAGE、android.permission.WRITE_EXTERNAL_STORAGE
属性
返回是否隐藏警告。
设置是否隐藏警告。
方法
...
Addressing localhost from a VirtualBox virtual machine [closed]
....agaric.com/localhost-from-virtualbox-xp-install-ubuntu
It suggests using IP: http://10.0.2.2, and it worked for me.
So, I edited the hosts file, C:\windows\system32\drivers\etc\hosts, and added this entry:
10.0.2.2 outer
If you're testing on IE8, remember to put http:// in the address bar. ...
实战做项目如何选择开源许可协议（一）-了解协议 - 开源 & Github - 清泛网...
...除了为用户提供版权许可之外，还有专利许可。与BSD协议权限类似， 允许代码修改，再发布，适用商业软件。但是也需要满足以下条件：1）需要给代码的用户一份Apache Licence。
2）如果你修改了代码，需要再被修改的文件中说...