openstack centos ubuntu 初始化密码

guestfish --rw -a bionic-server-cloudimg-amd64.img

Welcome to guestfish, the guest filesystem shell for
editing virtual machine filesystems and disk images.

Type: ‘help’ for help on commands
      ‘man’ to read the manual
      ‘quit’ to quit the shell

> run
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> mount /dev/sda1 /
> vi /etc/cloud/cloud.cfg

disable_root: 0

ssh_pwauth:   1

chpasswd:

  list: |

    root:redhat     <-----自定义root密码

  expire:False