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Test if remote TCP port is open from a shell script
I'm looking for a quick and simple method for properly testing if a given TCP port is open on a remote server, from inside a Shell script.
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Thin web server: `start_tcp_server': no acceptor (RuntimeError) after git branch checkout
... port 3000 may already be in use. Look at http://mrjaba.posterous.com/starttcpserver-no-acceptor-runtimeerror
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LEGO EV3 机器人按键控制 · App Inventor 2 中文网
...失败：检查EV3蓝牙是否开启并可见
控制延迟：减少蓝牙传输距离，避免干扰
按键无响应：确认蓝牙连接状态正常
电机异常：检查电机连接和端口配置
解决方案
重启蓝牙连接
重新配对设备
检查电机...
How can I access my localhost from my Android device?
...to laptop
Enable USB Debugging on mobile device
On laptop, run adb reverse tcp:4000 tcp:4000
Use your custom port number instead of 4000
Now, on the mobile device, you can navigate to http://localhost:4000/, and it will actually connect to the laptop, not the mobile device
See instructions here...
What is the difference between 127.0.0.1 and localhost
... @DonViegues Yeah you are right unix socket has less overhead than TCP/IP. I just wanted to mention this behaviour is specific to MySQL and not something in OS or networking level.
– Arman Ordookhani
Jul 30 '19 at 19:26
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MySQL connection not working: 2002 No such file or directory
...t is bound to the use of Unix domain sockets. It is not possible to open a TCP/IP connection using the hostname localhost you must use 127.0.0.1 instead." - php.net/manual/en/mysqli.quickstart.connections.php. So basically something is not working with connecting to the Unix domain sockets that allo...
记一次LVS/Nginx环境下的访问控制 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...递用户 IP 的问题，引入了一个名为 TOA 的补丁机制，在 TCP 的三次握手阶段，通过 TCP 的 options 来传递用户 IP 和端口等信息，继而覆盖 socket 的 IP 和端口数据。
换句话说，在 RS 服务器上，从 iptables 的角度看，因为 NAT 的缘故，...
How to close TCP and UDP ports via windows command line
Does somebody knows how to close a TCP or UDP socket for a single connection via windows command line?
17 Answers
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SQL Server, convert a named instance to default instance?
... for INSTANCENAME you want to make available (i.e. SQLExpress)
Right-click TCP/IP and click Enabled
Right-click TCP/IP and go to Properties
Go to the IP Addresses tab
Scroll down to the IPAll section
Clear the field TCP Dynamic Ports (i.e. empty/blank)
Set TCP Port to 1433
Click Ok
Go to SQL Serv...
ByteArray 扩展 - 字节数组处理工具 · App Inventor 2 中文网
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3. 数据加密
4. 传感器数据处理
5. 协议实现
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ByteArray 扩展
ByteArray扩展为App Inventor提供了强大的字节数组处理功能，支持各...