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Netcat : To Listen packet recieved in specific port Sample usecases

:\> nc -v -l 8089 ## Listen to the port 8089
:\> nc -v 127.0.0.1 8089

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Install ddclient and configure noip dyn DNS

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Install ddclient using following command

sudo apt-get install ddclient

Skip all installation steps (Don't worry we can configure after installation)

After successful installation open following file

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Download and store these 2 files in any folder Change the line @=""C:\devenv\commands\install-apk.bat" "%1"" with install-apk.bat file path Double click the .reg file and register it Icon files list : http://help4windows.com/windows_7_shell32_dll.shtml

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Formatting SD card using diskpart

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Insert the SD card into an card reader and plug it to the PC.

• Open a Windows command prompt console and start Diskpart by typing following command.

  \>diskpart

• List all of your disks.

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Clear Jenkins build history

Use the following script to clear the build history from jenkins. Goto Manage Jenkins > Script Console and type the following script

// change this variable to match the name of the job whose builds you want to delete
def jobName = "Your Job Name"
def job = Jenkins.instance.getItem(jobName)

job.getBuilds().each { it.delete() }

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Troubleshooting

• When jenkins build throws following error

   Going to invoke xcodebuild:target: Sampleapp, sdk: DEFAULT, workspace: Sampleapp, clean: YES, archive:NO, symRoot: DEFAULT, buildDir: DEFAULT, developmentTeamID: XXXXXXX
  [Sampleapp] $ /usr/bin/xcodebuild -target Sampleapp -workspace Sampleapp.xcworkspace clean build DEVELOPMENT_TEAM=XXXXXXX
  xcodebuild: error: You cannot specify targets with a workspace.

xcodebuild: error: If you specify a workspace then you must also specify a scheme. Use -list to see the schemes in this workspace.

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Device specifications

• Raspberry pi - Any
• USB Audio Adapter - USB Adapter
• USB Hub - Zebronics USB Hub

List USB Device

Once you connected the USB Audio device with Raspberry pi use following command to see the list of connected USB device

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Get Mac ID

#include <Arduino.h>
#include <ESP8266WiFi.h>
void setup() {
    Serial.begin(115200);
    Serial.println("Mac address:"+WiFi.macAddress());
}

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Get Mac id of ESP8266

#include <Arduino.h>
#include <ESP8266WiFi.h>
void setup() {
    Serial.begin(115200);
    Serial.println("Mac address:"+WiFi.macAddress());
}

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Install FFMPEG in ubuntu

sudo add-apt-repository ppa:mc3man/trusty-media

sudo apt-get update
sudo apt-get dist-upgrade

sudo apt-get install ffmpeg