What is Open Source? [Android A to Z]

What is open source? Open-source software is software that makes the source code freely available, for anyone to see and use. There are different open-source licenses that have different use conditions, from the GPL (GNU General Public License) -- which allows "free distribution under the condition that further developments and applications are put under the same license" -- to more liberal licenses like the Apache License, which doesn't require modifications to be open and have the source code available.  Android uses both of these licenses, and we'll have a look at them in turn.

How to Prepare Linux (Ubuntu) for Daily Activities

step 1
Create and Configure User Account
*suggest users to make complicated password at least 8 characters  
*enable shadow to avoid storing password in text mod
*do not use chsh command to modify /bin/false (it will prevent hacker to control system by default account for login)
*make sure that there is no account using ID nol and prevent login access remotely without password (configure file .rhost or /etc/host.equiv)

step 2
Secure Root Access
*login without root
*use root access for administration only
*edit /etc/security and add # in the beginning of rows
*disable telnet
*edit /etc/ssh/sshd_config to prevent SSH login
*set umask root to 077 (read, write, execute just for root) or 022 (for user)

Video File Format - Part 2

MP4 format
Standard formats for MPEG-4 is named by MP4. This sometimes causes people to get confused and think of it as audio formats like MP3. MP3 is actually associated with MPEG-1. MP3 audio is part of the original MPEG standard.

MPEG-4 is actually a type of so-called "container format". This format means combining several different content into a single file. Usually the content is audio coupled with video, but sometimes content such as still images are also put in an MP4 file.

Video and audio content are combined in MP4 can consist of a variety of formats. For the video format used eg DivX, XviD, ffmpeg, H.264 ( MPEG-4 AVC ). AAC format and MP3 audio examples, while for still images we can use the JPEG and PNG. All the content formats including MPEG-4 standard

Video File Format - Part 1

AVI
Audio Video Interleaved is a standard format video files for Microsoft Windows, which also video format "oldest" as introduced since Windows 3.1. And video-editing tools early generation software like Fast's AV Master and Miro/Pinnacle's DC10 also uses this format. This video format is capable of producing movement of 15 frames per second, the resolution 160x120 with maximum sound quality reached 11,025Hz. Almost all video cameras, especially the analog, generate file format extension. avi when transferred to a PC. Video formats that have This player has a myriad of applications problems the file size is large. but not This format is possible to compressed.

MPEG
Moving Picture Experts Group ( .Mpg or .Mpeg ) built as a standard for compression results digital video - audio files. This format produces high image quality, but not require large file capacity. MPEG compression is high enough eliminating a number frame displacement. Therefore, sometimes uneasy transition considered.
MPEG formats have different standards, but the main one is threefold: MPEG-1, MPEG-2 and MPEG-4.

How to Install and Use PayPal Icon to Receive Payments on Your Site

#step 1
Open the front page of the PayPal site, click the link Log in

#step2
Click the Merchant Services tab

#step 3
Once the page is open, you can choose the desired features like PayPal Shopping Chart, Buy Now Buttons, Other Leading Charts, Subscriptions & Recurring Payments, Donations, Gift Certificates and others.