修改qcow2镜像格式默认密码以及qcow2镜像下载地址

镜像下载地址

https://cloud.centos.org/centos/7/images/

修改qcow2镜像密码

1、安装libvirtd

# Ubuntu
$ apt install -y qemu-kvm libvirt-bin bridge-utils virt-manager

# CentOS
$ yum install -y qemu-kvm libvirt virt-install bridge-utils

2、启动libvirtd服务

systemctl start libvirtd

3、生成密码

[root@192 home]# openssl passwd -1 123456
$1$Nnv2QHyN$qu2bZyh7ef7xQJZnRtDSJ

4、加载qcow2文件

[root@192 system]# guestfish --rw -a CentOS-7-x86_64-GenericCloud-1805.qcow2

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

><fs>

5、修改密码

><fs> run
 100% ⟦▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒⟧ 00:00
><fs> list-filesystems 
/dev/sda1: xfs
><fs> mount /dev/sda1 /
><fs> vi /etc/shadow  #替代root的秘密，利用前面openssl生成的密码
><fs> quit