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distros/arch/pacman.md

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+Packages are kept in /var/cache/pacman/pkg.
+
+Delete unused old packages with:
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+> sudo pacman -Sc
+
+Signatures are handled by the pacman-key, initially set up with:
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+> sudo pacman-key --populate archlinux
+
+And refreshed with:
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+sudo pacman-key --refresh-keys
+
+If you have usigned keys, you can refresh with:
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+> sudo pacman -Sc
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+or 
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+> sudo pacman -Scc
+
+Reset all keys with:
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+> sudo rm -r /etc/pacmand.d/gnupg/ && sudo pacman-key --init
+
+If you're constantly getting 'everything corrupted, nothing upgraded', try running:
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+> sudo pacman -S archlinux-keyring
+