Hello friends.... im sharing some info about Linux..
1: This is my website which contains many many good things regarding Linux OS and Red Hat Exams... www dot tahir436 dot freeweb7 dot com
2: Here is a great video tutorial about VoIP and Trixbox (Asterisk Server) configuration... note Trixbox is a VoIP Linux Server..
asterisktutorials dot com slash videos slash trixbox slash intro dot html
Aziz doston mae InshAllah waqt ke sath sath mazeed malomaat bhi Linux ke hawale se share karonga..... Best of luck.
Bookmarks