我正在尝试在 DigitalOcean Server 上的 ubuntu 14 上安装letsencrypt,但遇到了这个问题。
我尝试 sudo 安装但同样的错误,也尝试安装库但没有任何反应。
apt-key 更新结果:
gpg: key 437D05B5: "Ubuntu Archive Automatic Signing Key <ftpmaster@ubuntu.com>" not changed
gpg: key FBB75451: "Ubuntu CD Image Automatic Signing Key <cdimage@ubuntu.com>" not changed
gpg: key C0B21F32: "Ubuntu Archive Automatic Signing Key (2012) <ftpmaster@ubuntu.com>" not changed
gpg: key EFE21092: "Ubuntu CD Image Automatic Signing Key (2012) <cdimage@ubuntu.com>" not changed
gpg: Total number processed: 4
gpg: unchanged: 4