Since OpenBSD 6.3 is released, it is time to upgrade 6.2.
The upgrade manual is here. But for newbies like me, I think the most challenge step is booting from ramdisk kernel, bsd.rd: Download and copy it into root file system:
# mv bsd.rd /
Then reboot machine, during prompting boot>, input boot /bsd.rd:
boot> boot /bsd.rd
Then upgrade OpenBSD according to the instructions.
For me, there are 2 important aspects of OpenBSD 6.3:
(1) The vim is upgrade to 8.0.1589, and the strange display issue is fixed when using terminal (Please refer this thread).
(2) My lscpu is included into ports since OpenBSD 6.3, so you can install it on x86 architectures:
# pkg_add lscpu
# lscpu
Architecture: amd64
Byte Order: Little Endian
Active CPU(s): 2
Total CPU(s): 2
......