$schemamarkup = get_post_meta(get_the_ID(), 'schemamarkup', true); if(!empty($schemamarkup)) { echo $schemamarkup; }

How to Add Mainline Repository for Ubuntu-Based Systems

January 19, 2021 | By the+gnu+linux+evangelist.

GNU/Linux Ubuntu Adding Mainline Repository

Hi! The Tutorial shows you Step-by-Step How to Add Mainline Software Repository in Ubuntu-Based GNU/Linux OSes.

And Mainline GUI for Ubuntu is a a UI Tool to manage the Linux Versions on Ubuntu based Desktops.

So this Repo 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
How to Add Mainline Repository for Ubuntu-based Systems - Featured
  1. 1. Launching Terminal

    How to QuickStart with Command Line on Ubuntu

    Bash Shell Ubuntu QuickStart Guide
  2. 2. Adding Mainline Repo

    Then to Add Mainline Repository for Ubuntu
    Execute:

    sudo add-apt-repository -y ppa:cappelikan/ppa
    Authenticate with the User’s Admin Pass.
    If Got “User is Not in Sudoers file” then see: How to Enable sudo.
  3. 3. Refreshing Ubuntu Repo Sources

    Next to Refresh Ubuntu Apt Repository Sources
    Needed on some Ubuntu derivatives:

    sudo apt update
    In case of Not Found Issue for the Latest Ubuntu release then you need to Amend the Repo Manually switching it back to the Previous one. So for instance on 21.10 editing the Repository with nano Editor:
    sudo nano /etc/apt/sources.list.d/*cappelikan*.list
    And change “impish” in “hirsute”.
    Ctrl+x to Save & Exit from nano Editor.
    Last, Refresh the Apt Sources again.
  4. 4. Mainline Getting Started

    Finally, to Get Started with Mainline Kernel Updating Tool for Ubuntu

    Mainline Ubuntu Quick Start Guide

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