You should be on the security-alert mailing list of the vendor of every operating system you admin. Typically these are extremely low-volume mailing lists, and applying the security patches they recommend is frequently urgent if your machine is connected to the internet.
More information
More information
Sites 6
Apache Week, includes security alerts.
Security announce mailing list for Debian Linux.
List of security announcements and information on how to sign up to security mailing list.
Security mailing list subscription.
All OpenBSD mailing lists, including security alerts.
Notifications and advisories. Security mailing list subscription is on this page.
Security announce mailing list for Debian Linux.
All OpenBSD mailing lists, including security alerts.
List of security announcements and information on how to sign up to security mailing list.
Security mailing list subscription.
Notifications and advisories. Security mailing list subscription is on this page.
Apache Week, includes security alerts.
