创建kylin虚拟机时默认密码复杂度太高不利于测试。1.首先查看系统版本 uname -a2.备份所涉及的两个文件cp /etc/pam.d/system-auth /etc/pam.d/system-auth.bak cp /etc/pam.d/password-auth /etc/pam.d/password-auth.bak3.修改system-auth.bak和password-auth中的配置参数这是修改之前的参数主要修改的password部分的4.替换password requisite行为如下的关闭相关的校验password requisite pam_pwquality.so try_first_pass local_users_only minlen1 minclass0 ucredit0 lcredit0 dcredit0 ocredit0 maxrepeat0 maxsequence0 reject_username0 enforce_for_root0 dictcheck05.对password-auth做同样的配置操作6.password root 输入密码为123456即可7.备份恢复cp /etc/pam.d/system-auth.bak /etc/pam.d/system-auth cp /etc/pam.d/password-auth.bak /etc/pam.d/password-auth