Protecting yourself against POODLE attacks by disabling SSLv3 Support in Browsers

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What is dirty db ?

It is a in-memory db used in Node.js

A tiny & fast key value store with append-only disk log. Ideal for apps with < 1 million records

This module is called dirty because:

• The file format is newline separated JSON
• Your database lives in the same process as your application, they share memory
• There is no query language, you just forEach through all records

So dirty means that you will hit a very hard wall with this database after ~1 million records, but it is a wonderful solution for anything smaller than that.

Source

What is gfe_rd=cr&ei= ?

It is a cookie link redirected to your browser based on the country from which it is accessed.

Which means If your enter
https://www.google.com

it will return
 https://www.google.co.in/?gfe_rd=cr&ei=fgdfsg4534fdg

and browser will store the cookie and redirect to https://www.google.co.in

gfe=Google Front End
rd=Redirect
cr=Country
ei=Engine Id

This Engine Id is the cookie that is sent to our browser.

.profile,.bash_profile and .bashrc

.profile

.profile is for things that are not specifically related to Bash, like environment variables PATH and friends, and should be available anytime.

For example, .profile should also be loaded when starting a graphical desktop session.

.bash_profile

.bash_profile is for making sure that both the things in .profile and .bashrc are loaded for login shells.

.bashrc

.bashrc is for the configuring the interactive Bash usage, like Bash aliases, setting your favorite editor, setting the Bash prompt, etc.

Can we submit an app to playstore that is signed by debug.keystore ?

No..
You can't you have to create a keystore and sign the app using that key.
Make sure the key is safe..or else you can push the update (it will cause signature error) 

how to get the our andoird app signed by debug.keystore ?

1)Make sure you have built the app atleast one time
2)Go to the bin folder and copy the .apk file that's enough.

How to create debug.keystore ?

Your debug keystore gets created automatically for us the first time we build an Android app

password for debug.keystore

android is the password

Find the location of debug.keystore

Input the following command in osx terminal 

mdfind debug.keystore

Headless environment

A environment that doesn't have UI interface only command line interface

Find the status of ADB

adb shell getprop service.adb.tcp.port

Android AVD:ERROR Unable to load VM from snapshot

Starting emulator for AVD ‘AVD-NAME’ emulator: ERROR: Unable to load VM from snapshot. The snapshot has been saved for a different hardware configuration.

Solution:
Go to AVD manager and choose edit avd then uncheck snapshot there you go

Android manually trigger OnBootCompleted

Windows:

 adb shell am broadcast -a android.intent.action.BOOT_COMPLETED

Osx:

 ./adb shell am broadcast -a android.intent.action.BOOT_COMPLETED

Emulator-5554 disconnected error message or Emulator-5554 offline

Solution 1:

• Run Emulator
• Keep the Emulator, (no matter same error occurs)
• Make Sure the Home Screen of Emulator is appeared
• go to Window -> Show Perspective -> DDMS --> In Devices Panel -> on Corner Drop Down Menu
• Reset adb

Solution 2:

     Run configurations > Target > Wipe user data > Run