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In my latest monthly update, I ran into the following error:

$ sudo pacman -Syu
:: Synchronizing package databases...
error: failed retrieving file 'core.db' from repo.ialab.dsu.edu : SSL certificate problem: certificate has expired
 core is up to date
error: failed retrieving file 'extra.db' from repo.ialab.dsu.edu : SSL certificate problem: certificate has expired
 extra is up to date
error: failed retrieving file 'community.db' from repo.ialab.dsu.edu : SSL certificate problem: certificate has expired
 community is up to date
error: failed retrieving file 'multilib.db' from repo.ialab.dsu.edu : SSL certificate problem: certificate has expired
 multilib is up to date

What is the standard, and most reliable way to resolve such SSL Certificate expiration issues?

I am using Manjero.

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I've also faced this problem but I got the solution: Open Add or Remove Softwares and got to Preferences and than change your official repositories to Canada than Refresh mirror lists

It may work now

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I found the most expedient solution in my case was to run

sudo pacman-mirrors --country Canada,United_States

(You should replace the list of countries with whatever countries you are in and near.) This will automatically update the mirrors in /etc/pacman.d/mirrorlist.

I subsequently found this article, which goes into more detail about pacman-mirrors: https://www.fosslinux.com/4252/how-to-find-mirror-list-and-set-fastest-download-server-on-manjaro.htm

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