从apt-get更新：
The following signatures were invalid: BADSIG 26C95CF201182252 Neo Technology Admins <admins@neotechnology.com> The following signatures were invalid: KEYEXPIRED 1572135620
Fetched 328 kB in 0s (339 kB/s)
Reading package lists... Done
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: https://debian.neo4j.org/repo stable/ Release: The following signatures were invalid: BADSIG 26C95CF201182252 Neo Technology Admins <admins@neotechnology.com> The following signatures were invalid: KEYEXPIRED 1572135620
W: Failed to fetch https://debian.neo4j.org/repo/stable/Release.gpg The …neo4j ×1