参考之前的方法：
https://www.cnblogs.com/zjxcyr/p/15705024.html
但是 /etc/apt/sources.list 中增加：
deb http://cz.archive.ubuntu.com/ubuntu bionic main universe
然后update就报错。
$ sudo apt update
Get:1 http://security.ubuntu.com/ubuntu jammy-security InRelease [110 kB]
Ign:2 http://packages.linuxmint.com virginia InRelease
Hit:3 http://archive.ubuntu.com/ubuntu jammy InRelease
Hit:4 http://packages.linuxmint.com virginia Release
Get:5 http://archive.ubuntu.com/ubuntu jammy-updates InRelease [119 kB]
Get:7 http://cz.archive.ubuntu.com/ubuntu bionic InRelease [242 kB]
Hit:8 http://archive.ubuntu.com/ubuntu jammy-backports InRelease
Err:7 http://cz.archive.ubuntu.com/ubuntu bionic InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 3B4FE6ACC0B21F32
Reading package lists... Done
W: GPG error: http://cz.archive.ubuntu.com/ubuntu bionic InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 3B4FE6ACC0B21F32
E: The repository 'http://cz.archive.ubuntu.com/ubuntu bionic InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.把这个公钥添加上：
$ sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 3B4FE6ACC0B21F32
Warning: apt-key is deprecated. Manage keyring files in trusted.gpg.d instead (see apt-key(8)).
Executing: /tmp/apt-key-gpghome.sfj5hc2oC9/gpg.1.sh --keyserver keyserver.ubuntu.com --recv-keys 3B4FE6ACC0B21F32
gpg: key 3B4FE6ACC0B21F32: public key "Ubuntu Archive Automatic Signing Key (2012) <[email protected]>" imported
gpg: Total number processed: 1
gpg: imported: 1再次update，有warning 无报错，
再次安装： sudo apt install libwebkitgtk-3.0-0
标签：mint21.3,http,libwebkitgtk,ADS2020.01,apt,key,ubuntu,com,InRelease From： https://www.cnblogs.com/zjxcyr/p/18054405