你看到了吗？
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: https://deb.torproject.org/torproject.org bionic InRelease: The following signatures were invalid: EXPKEYSIG 74A941BA219EC810 deb.torproject.org archive signing key
如果是这样，请执行以下操作：
sudo apt-key adv \
--keyserver keyserver.ubuntu.com \
--recv-key 74A941BA219EC810
…已弃用（等等）但对我有用。