They cheat and use busybox.
Meanwhile OpenBSD running all the default network services like sshd and smtpd uses < 32 MB RAM and that's with full ksh and real tools. That doesn't happen by accident.
Meanwhile OpenBSD running all the default network services like sshd and smtpd uses < 32 MB RAM and that's with full ksh and real tools. That doesn't happen by accident.