我正在尝试根据此站点中的说明更新内核https://www.cyberciti.biz/tips/compiling-linux-kernel-26.html
我从 kernel.org 安装了 5.4.12 内核和 5.4.12 密钥。
user:~$ gpg --verify linux-5.4.12.tar.sign
gpg: assuming signed data in 'linux-5.4.12.tar'
gpg: Signature made Sal 14 Oca 2020 22:09:38 +03
gpg: using RSA key 647F28654894E3BD457199BE38DBBDC86092693E
gpg: Good signature from "Greg Kroah-Hartman <[email protected]>" [unknown]
gpg: aka "Greg Kroah-Hartman <[email protected]>" [unknown]
gpg: aka "Greg Kroah-Hartman (Linux kernel stable release signing key) <[email protected]>" [unknown]
gpg: WARNING: This key is not certified with a trusted signature!
gpg: There is no indication that the signature belongs to the owner.
Primary key fingerprint: 647F 2865 4894 E3BD 4571 99BE 38DB BDC8 6092 693E
user:~$ gpg --recv keys 647F28654894E3BD457199BE38DBBDC86092693E
gpg: "keys" not a key ID: skipping
gpg: key 38DBBDC86092693E: 179 signatures not checked due to missing keys
gpg: key 38DBBDC86092693E: "Greg Kroah-Hartman <[email protected]>" not changed
gpg: Total number processed: 1
gpg: unchanged: 1
为什么会发生这种情况？我尝试了几天来更新内核，但总是出现错误。为什么我的 ubuntu 有很多我不知道的问题。