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Tested on OpenBSD 6.2 and 6.3
Read the official FAQ.
Backup your data.
Download OpenBSD installer and verify its checksum:
# PKG_PATH='http://fastly.cdn.openbsd.org/pub/OpenBSD' # ftp $PKG_PATH/6.3/amd64/install63.fs # ftp $PKG_PATH/6.3/amd64/SHA256.sig # sha256 -C SHA256.sig install63.fs (SHA256) install63.fs: OK #
Plug in USB flash drive:
# dmesg | grep removable | tail -n1 sd3 at scsibus5 targ 1 lun 0:
SCSI3 0/direct removable serial.12345678901234567890987654
In this case it appears as sd3.
Copy the installer image to the USB flash drive.
Be extremely cautious:
# dd if=install63.fs of=/dev/rsd3c bs=1m ... #
Boot from that USB drive, then choose the
(S)hell option to mount
the encrypted drive.
# bioctl -c C -l /dev/sd0c softraid0 passphrase: scsibus1 at softraid0: 1 targets sd2 at scsibus2 targ 0 lun 0:
SCSI2 0/direct fixed sd2: 10244MB, 512 bytes/sec, 20980362 sec total # exit
(U)pgrade option and follow the prompts similar to (install.html).
When OpenBSD upgrade is done, upgrade installed packages.
# pkg_add -u ... #