guestfish 修改kvm镜像系统密码方式（qemu）

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首先我们遇到问题，自己创建的镜像总是不够完善，但是下载的镜像又不知道密码，很麻烦，就只能想着怎么样才能解决这个问题，到google和百度搜索下，照着这个方式做了，提示用guestfish方式：
[root@controller1 ~]# guestfish --rw -a /usr/src/ubuntu-20.04-server.raw
Welcome to guestfish, the guest filesystem shell for
editing virtual machine filesystems and disk images.
Type: ‘help’ for help on commands
7 l, L9 S3 w& Y" ~# [4 P      ‘man’ to read the manual
      ‘quit’ to quit the shell
执行run命令：
# O8 A& I8 t7 B7 F( q) @5 W' g9 @' W><fs> run
1 j! t3 w) ~% _5 C0 c8 T. ?* h◓ 75% ⟦▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒ 100% ⟦▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒⟧ 00:00
  a, B7 J0 Q9 ^' k: M# W><fs>
接下来执行list-filesystems
><fs> list-filesystems
; P  b7 u, u1 n( b0 I8 t: e/dev/sda1: ext4
0 F* K! T1 P* Q1 X3 M6 a. N/dev/sda14: unknown
/dev/sda15: vfat
) S) n' O; L% @" {- v# U
><fs> mount /dev/sda1  /
><fs> vi /etc/shadow
0 F% }# }3 Q) ]- a7 W; h><fs> vi /etc/shadow
root:$1$sqYWS/Ap$v9rBnJlIgUpPPXnWfluVX1:18960:0:99999:7:::
><fs>
+ e' Y4 w( N( X3 }. N- z><fs>
><fs> quit
9 d) D/ l* M. K- X) ?  j/ I) S[root@controller1 ~]#

, z: \- O, S- R: G[root@controller1 src]# openssl passwd -1 'linux123!@#'
$1$sqYWS/Ap$v9rBnJlIgUpPPXnWfluVX1

  n7 {; I! \, E! q" l8 ?
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