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如何禁止用户使用空密

2009-05-27 11:59:30| 分类： Linux | 标签： |举报 |字号大中小订阅

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空密码允许用户在没有合法密码的情况下登录系统。当用户使用空密码登录系统他们可以在系统询问密码的时候直接敲回车进入。这样对系统来和对用户负责角度来说都有很大的安全风险。

如果要关闭空密码登录功能，请先备份/etc/pam.d/system-auth文件，并且删除nullok：

备份/etc/pam.d/system-auth文件：

  cp /etc/pam.d/system-auth /etc/pam.d/system-auth.backup

从/etc/pam.d/system-auth中删除nullok：

  auth sufficient /lib/security/pam_unix.so likeauth nullok

更改之后的结果类似于：

  auth sufficient /lib/security/pam_unix.so likeauth

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