Authentication token manipulation error

无法修改密码：Authentication token manipulation error

root@VM:/etc/pam.d# passwd ubuntu
passwd: Authentication token manipulation error
passwd: password unchanged

 解决方案：

将以下行注释
# password        requisite                       pam_pwquality.so minlen=8 ucredit=-1 lcredit=-1 dcredit=-1 ocredit=-1

 成功：