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I want to update qt 5.4.1 to Qt 5.5 or 5.4.2 because I want to test KDE Plasma on WayLand.

Note: Please provide solution that consume least network resources as I have limited bandwidth. KUbuntu 15.04

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  • Note Please provide your Ubuntu version :)
    – A.B.
    Sep 8, 2015 at 5:31
  • KUbuntu 15.04 Updated
    – AhmedBilal
    Sep 8, 2015 at 5:33
  • int_ua Yes, I am using Kubuntu 15.04
    – AhmedBilal
    Sep 8, 2015 at 5:39
  • Just curious, what are the reasons to update? Is it segfaulting on every connect/disconnect of an external display? bugs.kde.org/show_bug.cgi?id=341497
    – int_ua
    Sep 8, 2015 at 13:28
  • int_ua Because, I want to test Wayland
    – AhmedBilal
    Sep 9, 2015 at 3:44

4 Answers 4

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I advise you to install a virtual machine and install Ubuntu 15.10 indide this environment. Wily includes Qt 5.4.2.

Do not try to update your Vivid system with Qt 5.4.2.

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  • 1
    Very good advice! :-)
    – Fabby
    Sep 8, 2015 at 20:43
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As mentioned in other answers, this is not really recommended and may cause issues, however, if you really want it, go HERE and download the .run installer or

wget download.qt.io/official_releases/online_installers/qt-unified-linux-x64-online.run

chmod +x qt-unified-linux-x64-online.run

~/qt-unified-linux-x64-online.run

This will start the qt 5x installer.

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  • And please share your results afterwards :)
    – int_ua
    Sep 8, 2015 at 9:34
  • 1
    I decide not to give it try as it is around 800MBs. Second, I replied after many days because my laptop bios get corrupted and I fixed it. Thank you everyone. Hope to test it when 15.10 released.
    – AhmedBilal
    Sep 13, 2015 at 8:32
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Short: not ready yet.

General information is on this page: https://wiki.ubuntu.com/Touch/QtTesting

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  • Ok. Then how to install 5.4.2?
    – AhmedBilal
    Sep 8, 2015 at 5:40
  • Well, basic algorithm for software not available in official repositories is 1) Try finding PPAs with newer versions, if that fails - 2) Try checking for package availability on official webpage and if that fails - 3) Try building and installing from sources. But that can be quite challenging, unfortunately.
    – int_ua
    Sep 8, 2015 at 9:39
  • Looks like Mark found 2) in the other answer, please share your results if you decide to try it.
    – int_ua
    Sep 8, 2015 at 9:40
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Answer is totally based on my experience,and the same reason why I'm here,Searching for this same answer. Well now I have figured it out for me.

http://www.qt.io/download-open-source/

Just visit the link and download the offline installer for your machine and go through the simple click steps.I'm using ubuntu 14.04 and it worked for me pretty fine.

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