⇒ Your Precious Linux Binaries Already Run on FreeBSD
Most migrations away from Linux stop at one program that ships only as a Linux binary. FreeBSD has run such programs since 1995, when somebody wanted to play Doom, and today it runs one as a service in a jail without an address, started without a shell and out of reach of the Linux kernel interfaces that attackers have liked best in recent years. Unix Universe.
⇒ Your Edited Config Survives the Upgrade on FreeBSD
On Debian an upgrade stops to ask what to do about every configuration file you have changed, and an unattended one quietly leaves the package behind, security fixes included. RHEL writes the new version beside yours and says nothing. FreeBSD keeps a copy of what it shipped last time and merges both sets of changes on its own. Like for Like.
⇒ CARP Fails Over Without a Daemon
Two FreeBSD machines can share one IP address with two lines of configuration and no process to keep alive, because the heartbeat runs in the kernel, and the same interface speaks VRRPv3 whenever the other side of the switch expects it. Technical Beauty Scope.
