The most likely explanation is that this is a typo. 3-4 years experience seems more credible.
3-4 years*
He'd probably have picked 35 years, not 34, if it was intentional.
LAMP has been around only for about 20 years
Sixth Edition Unix was available outside Bell Labs in 1975. Plenty of time to start on your Linux sysadmin skills if you weren't such a slacker that you waited for Linus to grow up first.
Admittedly, Apache and Python were less common in 1977.
if you're surprised by a typo in a job posting, you haven't read many emails from recruiters.