steps to bootstrap vm from centos7 minimal iso image

• download centos7 minimal image

check sha256

becbfcea718898877ab5dc3d875b11ab53cd03c9ef97c83399d8ad5bf5ecdb36  CentOS-7-x86_64-Minimal-1707-01.iso

create a linux x86_64 vm (adjust memory, disk space, cpus etc)

add the iso file downloaded attached to the vm (as storage)

boot from iso and go through install

• change Date & Time to be UTC
  use Region: Etc, City: Coordinated Universal Time

• set root password and create an user as administrator

reboot using vm disk

• setup network

setup NAT forward guest port 22 to a host port like 4444

as root, run ip a to figure out the network interface (lo and something like enp0s3)

run dhclient -v enp0s3, then you should be able to ping internet

• make DHCP working on boot
  https://www.centos.org/docs/5/html/Deployment_Guide-en-US/s1-dhcp-configuring-client.html

• ssh into vm from host machine

something like and use password to login

ssh USER@localhost -p 4444

• add your public key to ~/.ssh/authorized_keys

• allow no password for sudoer

sudo visudo and enable the line

%wheel  ALL=(ALL)       NOPASSWD: ALL