useradd: cannot rewrite shadow password file

【OS】RHEL_AS4

【问题】root用户执行useradd命令报错，如下：

[root@localhost etc]# useradd efps4

useradd: cannot rewrite shadow password file

[root@localhost etc]# userdel efps4
userdel: error deleting shadow password entry

【解决】执行restorecon，如下：

[root@localhost etc]# restorecon /etc/shadow