How to install and configure Asterisk on Ubuntu 18.04 LTS

Asterisk.sh

 # Youtube: 

# !/bin/sh

# Step-1: Download and Install Asterisk
# =====================================

# To install Asterrsk run run the commands below:
sudo apt update
sudo apt install wget build-essential subversion
cd /usr/src/
sudo wget http://downloads.asterisk.org/pub/telephony/asterisk/asterisk-17-current.tar.gz

# After downloading extract it and run the installation script 
sudo tar zxf asterisk-17-current.tar.gz
cd asterisk-17.*/
sudo contrib/scripts/get_mp3_source.sh
sudo contrib/scripts/install_prereq install

# Now configure and perform some checks and validate that all is well.
sudo ./configure

# After that, you will need to select some modules to compile and install. Now select "format_mp3" from the appeared menu and press F12 for exiting:
sudo make menuselect

# When you’re all done, run the commands below to start compilation process.
sudo make -j2

# After compiling above, you can finally install Asterisk by running the commands below:
sudo make install

# You can now begin configuring your system.. First you may want to add some samples data to help you with configuring your platform. For that run the commands below:
sudo make samples
sudo make basic-pbx

# Finish the configuration by running the commands below:
sudo make config
sudo ldconfig

# Step 2: Creating Asterisk User
# ==============================

# For creating a dedicated user, run the follwoing commands.
sudo addgroup --quiet --system asterisk
sudo adduser --quiet --system --ingroup asterisk --no-create-home --disabled-password asterisk

# Now change two lines by uncommenting them:
sudo nano /etc/default/asterisk

AST_USER="asterisk"
AST_GROUP="asterisk"

# After that, add asterisk user to the dialout and audio groups:
sudo usermod -a -G dialout,audio asterisk

# Next, change permissions on all of Asterisk files and directory to make its users owner.
sudo chown -R asterisk: /var/{lib,log,run,spool}/asterisk /usr/lib/asterisk /etc/asterisk
sudo chmod -R 750 /var/{lib,log,run,spool}/asterisk /usr/lib/asterisk /etc/asterisk

# Step 3: Starting Asterisk
# ========================

# Run the commands below to enable and start Asterisk service
sudo systemctl enable asterisk
sudo systemctl start asterisk

# To verify that Asterisk is running, run the commands below:
sudo asterisk -vvvr

# Now Open the following port.
sudo ufw allow 5060/udp 			//SIP uses the UDP port 5060
sudo ufw allow 10000:20000/udp			//For Real Time Protocol (RTP)