If you look something like : error: freeplane: signature from "Leonidas Spyropoulos <artafinde@archlinux.org>" is marginal trust :: File /var/cache/pacman/pkg/freeplane-1.9.12-1-any.pkg.tar.zst is corrupted (invalid...
jonathanmh.com
signature from "Antergos Build Server (Automated Package Build System) <admin@antergos.org>" is unknown trust execute: sudo pacman-key...
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askubuntu.com
First find the location of the keyring. find . -print | grep -i 'login.keyring' Now delete the login.keyring file. rm ~/.gnome2/keyrings/login.keyring