I try to install Wine in Ubuntu 18.04 and follow the wiki:
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sudo dpkg --add-architecture i386
wget -nc https://dl.winehq.org/wine-builds/winehq.key
sudo apt-key add winehq.key
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sudo apt-key add winehq.key
gpg: invalid key resource URL '/etc/apt/trusted.gpg.d/home:selmf.gpg'
gpg: keyblock resource '(null)': General error
gpg: key 90BD7EACED8E640A: 1 signature not checked due to a missing key
gpg: key DFA175A75104960E: 1 signature not checked due to a missing key
gpg: key 76F1A20FF987672F: 1 signature not checked due to a missing key
gpg: key FCAE110B1118213C: 12 signatures not checked due to missing keys
gpg: key 0F92290A445B9007: 6 signatures not checked due to missing keys
gpg: key 3F3411BE43F8BC1F: 1 signature not checked due to a missing key
gpg: key A6616109451BBBF2: 12 signatures not checked due to missing keys
gpg: key 3B4FE6ACC0B21F32: 3 signatures not checked due to missing keys
gpg: key D94AA3F0EFE21092: 3 signatures not checked due to missing keys
gpg: key C8CAB6595FDFF622: 2 signatures not checked due to missing keys
gpg: key 871920D1991BC93C: 1 signature not checked due to a missing key
gpg: Total number processed: 17
gpg: skipped new keys: 17