Month: July 2020

Build custom OpenBSD

by

https://man.openbsd.org/release

dd if=/dev/zero of=mydisk.img bs=1 count=0 seek=2G

vnconfig mydisk.img

fdisk -iy vnd0

disklabel -E vnd0
add slice a with all the storage

newfs /dev/vnd0a


mount /dev/vnd0a /mnt/
cd /mnt/

tar zxvfph base67.tgz

cp /etc/resolv.conf /mnt/etc
cp /etc/installurl /mnt/etc

cd /mnt/dev/
./MAKEDEV all

#If you want to make it bootable copy the kernel
cp /bsd /mnt/

chroot /mnt/ /bin/sh

#Set root password
passwd root

#Create a fstab
#sd0a

# cat /etc/boot.conf
set tty com0
stty com0 115200

#cat /etc/ttys
#tty00   "/usr/libexec/getty std.9600"   vt220   on secure
tty00   "/usr/libexec/getty std.115200"   vt220   on secure

Good idea now is to bake a backup of the image.

Other good stuff to consider:

  • Allow ssh?
  • Create additional users?
  • No network configuration has been made yet

Test the image

OpenBSD has vmd with vmctl that allows you to run a virtual machine easily.

vmctl start -m 1G -i 1 -b /bsd -d mydisk.img "myvm" -c
  • m – memory
  • i – #nr of interfaces (network)
  • b – bios/kernel
  • d – disk
  • c – attach console after start

Categories BSD