The Tutorial Show How-to Installing/Enabling PHP 7 Pecl Extensions Manager for Linux Ubuntu Based OS's Servers and Desktops.
On the Guide Bottom You Find Links to Get Installed the APC PHP Accelerator and Http Pecl Modules on Ubuntu Linux.
The Content and Details are Expressly Reduced to Give Focus Only to the Essentials Instructions and Commands and Make Tut Easier to Read & Digest ;)
- Open Terminal Window
Cmd and Search "term"
- Installing PECL
sudo apt update
sudo apt install php-pear php7.0-dev
How-to Install APC Pecl Module on Linux Ubuntu: