How to install .deb package

1. sudo dpkg -i package.deb

Set time in Linux

• In CentOS
  date MMDDhhmmccyy
  MM - month
  DD - date
  hh - hour
  mm - minute
  cc - first two digit of the year (20)
  yy - last two digit of the year (10)
  
  
• Setting the time of your system

Install Chrome in Ubuntu 9.10

First way

1. Open file "/etc/apt/sources.list".
   
   
2. Add test in the file
   "deb http://ppa.launchpad.net/chromium-daily/ppa/ubuntu karmic main
   deb-src http://ppa.launchpad.net/chromium-daily/ppa/ubuntu karmic main".
   
   
3. run command
   "sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com 0xfbef0d696de1c72ba5a835fe5a9bf3bb4e5e17b5".
   
   
4. sudo apt-get update
   
   
5. sudo add-apt-key ppa:chromium-daily/ppa
   
   
6. sudo apt-get update
   
   
7. sudo apt-get install chromium-browser

Second way

1. Open file "etc/apt/sources.list"
   
   
2. add text to file
   deb http://ppa.launchpad.net/chromium-daily/ppa/ubuntu jaunty main
   deb-src http://ppa.launchpad.net/chromium-daily/ppa/ubuntu jaunty main
   
   
3. sudo aptitude install chromium-browser
   

Configure DNS in CentOS

1. Open /etc/resolv.conf file
   
   
2. put your DNS server ip's as follows. Keep space between "nameserver" and ip addressnameserver (IP of your DNS server)
   nameserver (IP of your DNS server)

Sinhala Vedio Songs

1. Asha Nirasha Mawu..
2. Liyu Pem Hasun
3. Ege Sinahawa thahanam
4. Obata sitha adare karai
5. Mage Lowata Oba Wadina Thura
6. Wiyo gee gayena
7. Obe sina laga
8. Duhulu Malak - Bonda Meedum
9. Ganga Addara
10. Kauruda Pave Pavee
11. Sihinayaki Oba
12. Obata waram nathi
13. Sinahawa atharin
14. Mahawarusawata (Somathilaka Jayamaha)
15. Ma nisa oba
16. Sagawanna epa hasaral
17. Premaya Puda Dee Awasanai
18. Aradana
19. Hinawenna Beri Tharamata
20. Soduru Athithaye - T.M Jayarathne

Asterisk CLI

Asterisk CLI commands.

1. #asterisk -r
2. #asterisk -vvvvvr - If you want debugging output, add one or many v's
3. #asterisk –vvvvvvvgrc - this show more debug info.
4. #asterisk -rx "logger reload" - If you want to run a CLI command in a shell script, use the x option

Primary Rate Interface (PRI)

• T1 ( 23B +D )
  B-channel : 64 kbit/s
  D-channel
  There are 24 channels.

Basic rate interface -BRI

2B + D = 144 kbit/s

B channel - 64 kbit/s

D channel - 16 kbit/s

B channel : carries data, voice, and other services.

D channel : carries control and signaling information

File Descriptors- Asterisk

file descriptors - voip-info.org: "file descriptors"

Folder creation issue

Can not create folder named "con" in desktop.

How to install Hylafax

• http://www.sertec.ca/

Install and configure NTP on CentOS 5.3

1. Install NTP (Network Time Protocol):
   yum -y install ntp
   
   
2. Edit the NTP config file:
   vi /etc/ntp.conf
   
   
3. At line 18, find "server 2.centos.pool.ntp.org" and under, add:
   server time.nrc.ca
   server time.chu.nrc.ca
   server tock.utoronto.ca
   server tick.utoronto.ca
   
   
4. Ajust the other NTP config file by editing:
   vi /etc/sysconfig/ntpd
   
   
5. At that file's second line:
   OPTIONS="-u ntp:ntp -p /var/run/ntpd.pid"
   
   
6. Modify this line to add the option -x that will force a NTP synch at boot time:
   OPTIONS="-x -u ntp:ntp -p /var/run/ntpd.pid"
   
   
7. Restart NTPD service:
   service ntpd start
   
   
8. Ajust system to automaticaly start the service at boot:
   chkconfig ntpd on
   
   Reference link

Install Hyladfax

Handbook : Basic Server Configuration:Modem-specific Guidance

• http://www.hylafax.org/content/Download

Asterisk commands

• asterisk -vvvgci : goto asterisk CLI

Installing Asterisk With Yum

http://www.asterisk.org/downloads/yum

SS7 Point Code

http://www.voip-info.org/wiki/view/SS7+Point+Code

Install KDE (Kubuntu) on Ubuntu

http://www.howtogeek.com/howto/ubuntu/install-kde-kubuntu-on-ubuntu/

SS7

• SS7 Protocol
  http://www.protocols.com/papers/ss7.htm
  http://www.ulticom.com/html/products/ss7-signaling-convergence-white-paper.aspx
  http://www.pt.com/page/tutorials/ss7-tutorial
  
  
• Asterisk And SS7
  http://www.pt.com/page/tutorials/ss7-tutorial
  
  
• Asterisk and SS7 Performance Tests
  http://www.cesnet.cz/doc/techzpravy/2007/asterisk-ss7-performance/#RVR06
  
  
• Asterisk libss7 (Original Help File)
  http://www.voip-info.org/wiki/view/Asterisk+libss7
  
  
• Asterisk SS7 Options
  http://wiki.sangoma.com/asterisk-ss7#LibSS7

Sadaham

• Mahamevna
  
  
• Noble Dhamma
  
  
• Dhamma Medicine
  
  
• Sinhala Tipitaka
  
  
• Teruwan

Asterisk Installation guides

• Insatll Asterisk 1.6.x in CentOS 5.2
  http://www.voip-info.org/wiki/view/CentOS+5.2+and+Asterisk+1.6.x+installation
  
  
• Install Asterisk in Red Hat 8
  http://www.automated.it/guidetoasterisk.htm

Asterisk Dialplan

How to write dialplan to restrict a user to call only predefine extensions.

;--------------------------------------------------------------------------------

; Context for allow ext-100 to call only ext-200,201,202,203,204

; and any extension begins with number 3 and contains 3 digits.

;If he get a call to any other number, it will hangup by the context.

[from-restricted]

exten => _200,1,Goto(from-internal,${EXTEN},1)

exten => _201,1,Goto(from-internal,${EXTEN},1)

exten => _202,1,Goto(from-internal,${EXTEN},1)

exten => _203,1,Goto(from-internal,${EXTEN},1)

exten => _204,1,Goto(from-internal,${EXTEN},1)

exten => _3XX,1,Goto(from-internal,${EXTEN},1)

;--------------------------------------------------------------------------------

1. You have to include above context in
   extension.conf file(in CentOS file location is /etc/asterisk/extension.conf).
2. Then you can change the context of
   extension 100 to from-restricted. (in Asterisk 1.6 file location is /etc/asterisk/user.conf)