Install FreePBX 15 with Asterisk 16 on Debian 10

Install Asterisk 16 
 Step 1: Update system 
 sudo apt update && sudo apt upgrade
sudo reboot 
 Step 2: Install Asterisk 16 LTS dependencies 
 sudo apt install git curl wget libnewt-dev libssl-dev libncurses5-dev subversion libsqlite3-dev build-essential libjansson-dev libxml2-dev uuid-dev 
 Step 3: Download Asterisk 16 LTS tarball 
 cd /usr/src/
sudo curl -O http://downloads.asterisk.org/pub/telephony/asterisk/asterisk-16-current.tar.gz

sudo tar xvf asterisk-16-current.tar.gz
cd asterisk-16*/

# download the mp3 decoder library into the source tree
sudo contrib/scripts/get_mp3_source.sh

# Ensure all dependencies are resolved
sudo contrib/scripts/install_prereq install 
 Step 4: Build and Install Asterisk 16 
 sudo ./configure
sudo make menuselect
 
 
 Add-ons: chan_ooh323, format_mp3 
 Core Sound Packages: CORE-SOUNDS-EN-* 
 Music On Hold File Packages: MOH-OPSOUND-*  
 Extra Sound Packages: EXTRA-SOUNDS-EN-* 
 Applications: app_macro 
 
 sudo make
sudo make install
sudo make progdocs
sudo make samples
sudo make config
sudo ldconfig 
 Create Asterisk User 
 sudo groupadd asterisk
sudo useradd -r -d /var/lib/asterisk -g asterisk asterisk
sudo usermod -aG audio,dialout asterisk
sudo chown -R asterisk.asterisk /etc/asterisk
sudo chown -R asterisk.asterisk /var/{lib,log,spool}/asterisk
sudo chown -R asterisk.asterisk /usr/lib/asterisk 
 Set Asterisk default user to asterisk 
 $ sudo vim /etc/default/asterisk
AST_USER="asterisk"
AST_GROUP="asterisk"

$ sudo vim /etc/asterisk/asterisk.conf
runuser = asterisk ; The user to run as.
rungroup = asterisk ; The group to run as. 
 Restart asterisk service 
 sudo systemctl restart asterisk

# Enable asterisk service to start on system boot
sudo systemctl enable asterisk

# Test to see if you can connect to Asterisk CLI
sudo asterisk -rvv
 
 Install FreePBX 15 
 Step 1:  Install MariaDB Database server 
 sudo apt update
sudo apt install mariadb-server mariadb-client

# Initial DB setup and set root's password for DB
sudo /usr/bin/mysql_secure_installation 
 Step 2: Installing Node.js 10 LTS 
 sudo apt install curl dirmngr apt-transport-https lsb-release ca-certificates
curl -sL https://deb.nodesource.com/setup_10.x | sudo bash
sudo apt update
sudo apt install gcc g++ make
sudo apt install nodejs 
 Step 3: Install and configure Apache Web Server 
 sudo apt install apache2

# change Apache user to asterisk and turn on AllowOverride option
sudo cp /etc/apache2/apache2.conf /etc/apache2/apache2.conf_orig
sudo sed -i 's/^\(User\|Group\).*/\1 asterisk/' /etc/apache2/apache2.conf
sudo sed -i 's/AllowOverride None/AllowOverride All/' /etc/apache2/apache2.conf

# Remove default index.html page
sudo rm -f /var/www/html/index.html 
 Step 4: Install PHP and required extensions 
 sudo apt install wget php php-pear php-cgi php-common php-curl php-mbstring php-gd php-mysql \
php-gettext php-bcmath php-zip php-xml php-imap php-json php-snmp php-fpm libapache2-mod-php 
 Change php maximum file upload size 
 sudo sed -i 's/\(^upload_max_filesize = \).*/\120M/' /etc/php/7.3/apache2/php.ini
sudo sed -i 's/\(^upload_max_filesize = \).*/\120M/' /etc/php/7.3/cli/php.ini 
 Step 5: Install FreePBX 15 
 sudo apt install wget
cd /usr/src
wget http://mirror.freepbx.org/modules/packages/freepbx/freepbx-15.0-latest.tgz

tar xfz freepbx-15.0-latest.tgz
rm -f freepbx-15.0-latest.tgz

cd freepbx
sudo ./start_asterisk start
sudo ./install -n --dbuser root --dbpass "yourpassword"

# Enable Apache Rewrite engine 
sudo a2enmod rewrite
sudo systemctl restart apache2 
 Step 6: Access FreePBX 15 Web Interface 
 Create the first admin account. 
 Q & A 
 Q: Online modules are not available. 
 
 Error: 
 Warning: Error retrieving updates from online repository(s) (https://mirror.freepbx.org 35). Online modules are not available. 
 
 A: Change the DNS to 8.8.8.8 
 vi /etc/resolv.conf

nameserver 8.8.8.8
#nameserver 67.207.67.3
#nameserver 67.207.67.2 
   
 Reference 
 
 Install Asterisk 16 with FreePBX 15 on Ubuntu 20.04/18.04/16.04 & Debian 9 
 Install Asterisk 16 LTS on Ubuntu 20.04/18.04/16.04 & Debian 10/9 
 How To Install FreePBX 15 on Ubuntu 20.04/18.04/16.04 & Debian 10/9 
 Installing FreePBX 15 on Debian 9.6