Question

5

PPA: Install old version

rated 0 times [ 5] [ 0] / answers: 1 / hits: 900 / 1 Year ago, sun, december 18, 2022, 5:34:12

I am trying to install package qelectrotech on ubuntu 18.04.

After installing I got (old) version 0.5-2. So I added a PPA (sudo add-apt-repository ppa:scorpio/qelectrotech-dev) source to get the newer version. But they don't work automatically. Now I need to manually force "downgrade" and look for the version to get a new version of 0.90.

After checking, I realised that my ubuntu system added some version info before the actual version!

I see old (original 0.5-2 ) the old version 1:0.5-2 and the version in PPA (new 0.90.r7446) as 0.90.r7446.

As 0.90.r7664 seems older than 1:0.5-2, I always get the old version installed instead of the new. So how to get rid of that 1:, as this is not the part of the original version?

Thank you

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nuehan

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answered 1 Year ago bewre · Accepted Answer

The bad moment here is that you do not want to read QElectroTech-dev
PPA description on its page.

The developer clearly states:

QElectroTech Ubuntu Repository for 0.9 devel version.

Ubuntu pinning

The following entry assigns a high priority to all
versions of the QElectroTech package beginning with 0.80. :

This way,
your system will download the higher package version from the ppa and
not those from the official Ubuntu repositories.

Create manually the file 40qelectrotech-devel in
/etc/apt/preferences.d/ and add these 3 lines:

Package: qelectrotech*

Pin: version 0.90.*

Pin-Priority: 1001

https://qelectrotech.org/wiki_new/start?id=en/doc/install_ubuntu

apt-get install qelectrotech qelectrotech-data qelectrotech-examples
qet-tb-generator

So you need to really create such file with relevant version by using command below:

cat <<EOF | sudo tee /etc/apt/preferences.d/40qelectrotech-devel

Package: qelectrotech*

Pin: version 0.90.*

Pin-Priority: 1001

EOF

and then install these 0.90 versioned packages by:

sudo apt-get install qelectrotech qelectrotech-data qelectrotech-examples