在Ubuntu上更新Jellyfin系统，可按以下步骤操作：
sudo apt update和sudo apt upgrade -y。wget -O - https://repo.jellyfin.org/ubuntu/jellyfin_team.gpg.key | sudo apt-key add -和echo "deb [arch $(dpkg --print-architecture)] https://repo.jellyfin.org/ubuntu $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/jellyfin.list。sudo apt install jellyfin -y；若已安装，用sudo apt install --only-upgrade jellyfin -y。sudo systemctl restart jellyfin。jellyfin --version查看版本，确认更新成功。
