在配置nfs服务器,设定selinux时,碰到了SELinux: Could not downgrade policy file的错误提示,下文是其解决方案. 一.故障现象 [root@system1 ~]# semanage fcontext -a -t 'public_content_t' '/protected(/.*)?' SELinux: Could not downgrade policy file /etc/selinux/targeted/policy/policy.29, se…