Dial/Accept phone call using command line in Android

To dial phone number using service call

adb shell service call phone 2 s16 "+123456789"

To dial call using activity manager

adb shell am start -a android.intent.action.CALL -d tel:123456789

To accept incomming call

adb shell input keyevent 5

To disconnect call

adb shell input keyevent 6

How to integrate meld in your ubuntu file browser

Follow below post to know this
http://mrgierer.wordpress.com/2010/05/14/ubuntu-diff-tool-with-file-browser-integration/

Accomplish your task using single line on command prompt

http://www.commandlinefu.com/commands/browse

Good SoX examples

This link has some good examples to manipulate audio using SoX.
http://www.thegeekstuff.com/2009/05/sound-exchange-sox-15-examples-to-manipulate-audio-files/

Copy from remote machine to local machine securely without logging

scp username@remote_pc_ip:/path_to_remote_file path_to_local_file

How to extract files from android system.img

To extract files from android system.img on linux PC, use below steps
1) simg2img system.img system_ext4.img
2) mkdir temp
3) sudo mount -o rw,loop system_ext4.img temp
Now you can browse or copy files from temp folder.

Get google android phone factory images

https://developers.google.com/android/nexus/images