mattarmostをUbuntu22.04にインストール
curl -sL -o- https://deb.packages.mattermost.com/pubkey.gpg | gpg --dearmor | sudo tee /usr/share/keyrings/mattermost-archive-keyring.gpg > /dev/null
4月6日からkeyringが変わりました
[Bug]: Mattermost apt repository GPG signing key is expired (today)
https://github.com/mattermost/desktop/issues/3000
curl -o- https://deb.packages.mattermost.com/repo-setup.sh | sudo bash -s mattermost
sudo apt update
sudo apt install mattermost -y
つづく