first download and install the windows based softphone called xlite from http://www.counterpath.com/

download and install the following package if it does not exist in your linux box. the asterisk installation will fail if any of the following packages does not exist in the machine.

Packages:

gcc
cpp
glibc-headers
glibc-devel
glibc-kernheaders
gcc-c++
libstdc++-devel
libtermcap-devel

Hope you have all the packages mentioned above.

lets start.
go to the linux machine. create a directory as your choice. here am creating under /usr/local/

command:
mkdir /usr/local/asterisk

go to the newly created directory

command:
cd /usr/local/asterisk/

then am downloading the asterisk package from www.asterisk.org

command:
wget http://downloads.digium.com/pub/asterisk/releases/asterisk-1.4.22.tar.gz

once the download completed , unpack the package.

command:
tar -xvzf ./asterisk-1.4.22.tar.gz

note: in the above command the file name is the name of the file which we downloaded before.

once the unpack completed, the package is unpacked into the directory /usr/local/asterisk/ as a folder named asterisk-1.4.22. that is /usr/local/asterisk/asterisk-1.4.22/

now you need to jump into the newly created directory.

command:
cd asterisk-1.4.22

the final step is to compile the package.

commands:

make clean
./configure
make
make install
make samples
make progdocs

note: above listed are six different commands and it needs to be executed one by one.

now almost done. the package is successfully installed. hopefully

now, to make the basic asterisk to run, we need to edit the two configuration files located in /etc/asterisk/

the file names are (with full absolute path)

/etc/asterisk/sip.conf
/etc/asterisk/extensions.conf

first we are going to edit the sip.conf file.

command:
vi /etc/asterisk/sip.conf

go to the bottom of the file and paste the following configuration. this configuration actually creating the sip user accounts. the first line [thiyagu] is the user name. here i used my name thiyagu as the username.

the third line which is secret=thi123 is the place where you need to key in your desired password. here i used the password thi123. am creating two users in the name of thiyagu and jack

[thiyagu]
type=friend
secret=thi123
qualify=yes
nat=no
host=dynamic
canreinvite=no
context=internal

[jack]
type=friend
secret=jack123
qualify=yes
nat=no
host=dynamic
canreinvite=no
context=internal

the sip.conf is now completed. the next one is extensions.conf. the file is under /etc/asterisk/
here we are going to create the extension numbers for each users which we created before.
am assigning the extension number 100 for user thiyagu and 1o1 for jack

command:
vi /etc/asterisk/extensions.conf

go to the bottom of the file and paste the following config.

[internal]
include => outbound
exten => 100,1,Dial(SIP/thiyagu,20,tr)
exten => 101,1,Dial(SIP/jack,20,tr)

thats it . you are done.

now run the asterisk executable

command:
/usr/sbin/asterisk -vvvvc

it should run without any errors. Configure the username we created under sip.conf in xlite softphone in two different machines and call each other.

Have Fun

Let’s start,

Scenario 1:

You need to send a email from the linux command prompt with the log file attached.

The log file name is myprogram.log and located in /var/log/myprogram.log

The log need to be send to someone@mycompany.com

Make sure your linux box having the “uuencode” tool installed. Also you need a “Mail Transport Agent”. in this example am using “mail” (like mutt,mailx)

Step 1:

Am creating a file automail.sh

Command:

vi automail.sh

Step 2:

Am adding the following script to the newly opened file

#!/bin/bash

MYFILE=/var/log/myprogram.log

(echo “Please find the attached log”; uuencode $MYFILE myprogram.log;) | mail -s “My Program log” someone@mycompany.com

(above script highlighted in red is a full single line)

Step 3:

Save the file and exit from vi editor

Step 4:

Change the permission of the file to executable

Command:

chmod 700 ./automail.sh (assuming the file in current directory and the login use is root)

That’s it. This script will send the log file attached in the email with subject “My Program log” and the body of the message “Please find the attached log”

Scenario 2:

You need to send a log file emailed to your boss every day from the linux command prompt.

The log file name is not same every day. The log file name stored in the following format myprogram_2008_03_28.log, next day myprogram_2008_03_29.log and so

on.

In this example, we are sending the log in the same day when it generated.

Let’s start,

Step 1:

Am creating a file automail-random.sh

Command:

vi automail-random.sh

Step 2:

Am adding the following script to the newly opened file

#!/bin/bash

NDATE=$(date +%Y-%m-%d)

MYFILE=/var/log/myprogram_$NDATE.log

(echo “Please find the attached log”; uuencode $MYFILE myprogram_$NDATE.log;) | mail -s “My Program log” someone@mycompany.com

(above script highlighted in red is a full single line)

Step 3:

Save the file and exit from vi editor

Step 4:

Change the permission of the file to executable

Command:

chmod 700 ./automail-random.sh (assuming the file in current directory and the login use is root)

That’s it. This script will send the log file attached in the email everyday with subject “My Program log” and the body of the message “Please find the attached log”

Wait a minute.

What happen if the file does not exist? No NUKE. The program simply fails to execute.

To avoid this, add the “if” condition to the program and validating the file can overcome the trouble.

The final program with the “if” condition below.

#!/bin/bash

NDATE=$(date +%Y-%m-%d)

MYFILE=/var/log/myprogram_$NDATE.log

if [ -f $MYFILE ]; then

(echo “Please find the attached log”; uuencode $MYFILE myprogram_$NDATE.log;) | mail -s “My Program log” someone@mycompany.com

(above script highlighted in red is a full single line)

else

mails -s “Log File is not Generated or Not found” someone@mycompany.com < /dev/null

fi

#—–END—–#

HAVE FUN….