花生省魔術了...
W: GPG error: http://free.nchc.org.tw/ubuntu focal InRelease: Couldn't create temporary file /tmp/apt.conf.JGIPqT for passing config to apt-key
E: The repository 'http://free.nchc.org.tw/ubuntu focal 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.
W: GPG error: http://free.nchc.org.tw/ubuntu focal-updates InRelease: Couldn't create temporary file /tmp/apt.conf.xX4HDY for passing config to apt-key