Problem Description
When I ran apt-get update today, I suddenly encountered the problem of not being able to verify the following signatures due to the lack of a public key. I tried many methods on the Internet and finally found a pro-test and effective solution:
Solution
Type in the terminal:
sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 76F1A20FF987672F
The last code is the last part of the error statement: because there is no public key, the following signatures cannot be verified: NO_PUBKEY 76F1A20FF987672F
Solution result
Executing: /tmp/apt-key-gpghome.uBwlOPqFFF/gpg.1.sh --keyserver hkp://keyserver.ubuntu.com:80 --recv 76F1A20FF987672F
gpg: key 76F1A20FF987672F: 1 signature not checked due to a missing key
gpg: 密钥 76F1A20FF987672F：公钥“WineHQ packages <[email protected]>”已导入
gpg: 合计被处理的数量：1
gpg: 已导入：1