GNU/Linux Ubuntu Jitsi Meet Repository Setup – Step-by-step Guide
How to Add Jitsi Meet Repository on Ubuntu-Based GNU/Linux OSes.
And Jitsi for Ubuntu is a Set of Open-Source Projects that allows you to easily Built and Deploy Secure Videoconferencing Solutions.
So this Setup is valid for all the Ubuntu-based Distros like:
- Linux Mint
 - Lubuntu
 - Kubuntu
 - Xubuntu
 - Zorin OS
 - Elementary OS
 - Linux Lite
 - Bodhi Linux
 - Kde Neon
 - Pop!_OS
 - Voyager
 - Trisquel
 - LXLE
 - feren OS
 - Peppermint
 - Q4OS
 - Linux Ultimate Edition
 
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1. Launching Shell Emulator
Open a Terminal window
Ctrl+Alt+t on desktop
(Press “Enter” to Execute Commands)In case first see: Terminal QuickStart Guide.
 
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2. Adding jitsi Meet Key
So first Add jitsi Meet GPG Key
Execute:sudo apt-key adv --keyserver hkps://keys.openpgp.org --recv-keys B4D2D216F1FD7806
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2. Adding jitsi Meet Repo
Then to Add jitsi Meet Repository for Ubuntu
Execute:sudo sh -c "echo 'deb https://download.jitsi.org stable/' >> /etc/apt/sources.list.d/jitsi-stable.list"
Instead, for the Nightly releases:sudo sh -c "echo 'deb https://download.jitsi.org unstable/' >> /etc/apt/sources.list.d/jitsi-unstable.list"
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3. Refreshing Ubuntu Repo Sources
Next to Refresh Ubuntu Apt Repository Sources
Do:sudo apt update
Authenticate with the User Admin Pass.
If Got “User is Not in Sudoers file” then see: How to Enable sudo. - 
4. Installing jitsi Meet on Ubuntu
Finally, to Install jitsi Meet for Ubuntu Based