How to Add Qt4 PPA for Ubuntu-Based Systems

Qt4 Ubuntu PPA Repo Adding

Hi! The Tutorial shows you Step-by-Step How to Add Qt4 PPA Repository in Ubuntu-Based GNU/Linux OSes.

And Qt4 Repo for Ubuntu is leading to Install Qt 4 on unsupported Ubuntu 20.04+ releases.

Finally, 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

1. 1. Launching Shell Emulator

   Open a Terminal window
   (Press “Enter” to Execute Commands)

   
   In case first see: Terminal QuickStart Guide.
   

2. 2. Adding Qt4 Repo

   Then to Add Qt4 Repository for Ubuntu
   Execute:

   sudo add-apt-repository ppa:rock-core/qt4

   Authenticate with the User Admin Pass.
   If Got “User is Not in Sudoers file” then see: How to Enable sudo.
   Especially relevant, on 20.10+ Releases then you have to Fix the Repo File manually, so for instance using the nano Editor:

   sudo nano /etc/apt/sources.list.d/rock-core-ubuntu-qt4*.list

   And Set it as for “focal“, so for instance change “jammy” in “focal”!
   Ctrl+x to Save & Exit from nano Editor.
   And then for most Ubuntu-based OSes to Refresh the Apt Repos:

   sudo apt update

3. 3. Installing Qt4 on Ubuntu

   Finally, to Install Qt4 for Ubuntu Based

   Qt4 Ubuntu Installation Guide

   Qt4 Setup on Ubuntu