GNU/Linux Ubuntu 20.10 Installing Pecl – Step by step Guide
How to Install PHP PECL in GNU/Linux Ubuntu 20.10 Groovy desktop.
And PECL for Ubuntu Groovy (PHP Extension Community Library) is a Repository of Extensions for the PHP programming language.

1. Launching Terminal
Ubuntu Terminal Tutorial for Beginners
And update Ubuntu Apt Repos:sudo apt update
Authenticate with the User Admin Pass.
If Got “User is Not in Sudoers file” then see: How to Enable sudo.
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