Rolling Back Packages on Ubuntu/Debian, (Tue, Apr 16th)

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Package updates/upgrades by maintainers on the Linux platforms are always appreciated, as these updates are intended to offer new features/bug fixes. However, in rare circumstances, there is a need to downgrade the packages to a prior version due to unintended bugs or potential security issues, such as the recent xz-utils backdoor. Consistently backing up your data before significant updates is one good countermeasure against grief. However, what if one was not diligently practicing such measures and urgently needed to simply roll back to a prior version of the said package? I was recently put in this unenviable position when configuring one of my systems, and somehow, the latest version of Proton VPN (version 4.3.0) would not work and displayed the following output after I executed it:

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