![不受信任的软件包警告](https://linux22.com/image/1126897/%E4%B8%8D%E5%8F%97%E4%BF%A1%E4%BB%BB%E7%9A%84%E8%BD%AF%E4%BB%B6%E5%8C%85%E8%AD%A6%E5%91%8A.png)
当我尝试更新系统时收到以下警告:
W: GPG error: http://archive.canonical.com vivid Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32
W: GPG error: http://dl.google.com stable Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY A040830F7FAC5991
W: GPG error: http://dl.google.com stable Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY A040830F7FAC5991
W: GPG error: http://security.ubuntu.com precise-security Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5
W: GPG error: http://dl.google.com stable Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY A040830F7FAC5991
W: GPG error: http://security.ubuntu.com vivid-security Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32
W: GPG error: http://ubuntu.mirror.lhisp.com vivid Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32
W: GPG error: http://ubuntu.mirror.lhisp.com vivid-backports Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32
W: GPG error: http://ubuntu.mirror.lhisp.com vivid-proposed Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32
W: GPG error: http://ubuntu.mirror.lhisp.com vivid-updates Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32
我尝试使用以下方法添加丢失的键:
sudo gpg --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys KEY_VALUE
我收到以下消息,
gpg: requesting key C0B21F32 from hkp server keyserver.ubuntu.com
gpg: key C0B21F32: "Ubuntu Archive Automatic Signing Key (2012) <[email protected]>" not changed
gpg: Total number processed: 1
gpg: unchanged: 1
我也尝试过这个解决方案:
sudo apt-get clean
cd /var/lib/apt
sudo mv lists lists.old
sudo mkdir -p lists/partial
sudo apt-get clean
sudo apt-get update
但我仍然收到上述警告。
答案1
答案2
当镜像服务器尚未完全更新时,就会发生这种情况。
您可以稍后再尝试,或者切换到另一个镜像
系统设置->软件和更新。