Code:
sudo freebsd-update -r 13.1-RELEASE upgrade
Looking up update.FreeBSD.org mirrors... 2 mirrors found.
Fetching metadata signature for 13.0-RELEASE from update1.freebsd.org... done.
Fetching metadata index... done.
Fetching 1 metadata patches. done.
Applying metadata patches... done.
Inspecting system... done.
The following components of FreeBSD seem to be installed:
kernel/generic src/src world/base world/lib32
The following components of FreeBSD do not seem to be installed:
kernel/generic-dbg world/base-dbg world/lib32-dbg
Does this look reasonable (y/n)? y
Fetching metadata signature for 13.1-RELEASE from update1.freebsd.org... failed.
Fetching metadata signature for 13.1-RELEASE from update2.freebsd.org... failed.
No mirrors remaining, giving up.
This may be because upgrading from this platform (amd64)
or release (13.1-RELEASE) is unsupported by freebsd-update. Only
platforms with Tier 1 support can be upgraded by freebsd-update.
See https://www.freebsd.org/platforms/index.html for more info.
If unsupported, FreeBSD must be upgraded by source.
ping freebsd.org
PING freebsd.org (96.47.72.84): 56 data bytes
64 bytes from 96.47.72.84: icmp_seq=0 ttl=52 time=114.404 ms
64 bytes from 96.47.72.84: icmp_seq=1 ttl=52 time=114.332 ms
64 bytes from 96.47.72.84: icmp_seq=2 ttl=52 time=114.453 ms
^C
--- freebsd.org ping statistics ---
3 packets transmitted, 3 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 114.332/114.396/114.453/0.050 ms