参考文献
https://askubuntu.com/questions/194/how-can-i-install-just-security-updates-from-the-command-line
https://debian-administration.org/article/241/Getting_Debian_Security_Updates
https://serverfault.com/questions/424486/how-to-get-a-list-of-security-updates-on-the-command-line-in-debian-ubuntu
https://www.debian.org/doc/manuals/securing-debian-howto/ch4.en.html#s-security-update
https://lists.debian.org/debian-security-announce/