有一个总的网站:
http://www.securityfocus.com/
比如:http://www.securityfocus.com/bid/51625/info
一、RHEL:
网站:https://access.redhat.com/security/updates/advisory/
twitter:http://twitter.com/redhaterrata
二、ubuntu:
网站:http://www.ubuntu.com/usn
twitter:http://twitter.com/ubuntusecurity
三、debian
网站:http://www.debian.org/security/
twitter:http://twitter.com/#!/debiansecurity
包更新信息可以看: http://www.debian.org/distrib/packages
四、centos
网站:http://lists.centos.org/pipermail/centos-announce/
twitter: https://twitter.com/#!/CentOS_Announce