ubuntu使用root权限登录的设置方法
<p style='margin: 0px; padding: 5px 0px; outline: none; font-size: 14px; line-height: 30px; font-family: tahoma, arial, "Microsoft YaHei";'>Ubuntu系统默认是不允许用户以root身份登录的，在网上找到的方法如下：</p>
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1、首先设置root密码，利用现有管理员帐户登陆Ubuntu，在终端执行命令：sudo passwd root，接着输入密码和root密码，重复密码。这样就有了可用的root用户。</p>
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2、默认情况是不允许用root帐号直接登录图形界面的。这可以通过修改 vi /etc/lightdm/lightdm.conf文件来允许root直接登录，</p>
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增加 greeter-show-manual-login=true allow-guest=false . 修改完的整个配置文件是</p>
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<br>
greeter-session=unity-greeter<br>
user-session=ubuntu<br>
greeter-show-manual-login=true #手工输入登陆系统的用户名和密码<br>
allow-guest=false #不允许guest登录<br>
重启ubuntu，登录窗口会有“登录”选项，这时候我们就可以通过root登录了。</p>
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如果上面方式还是无法解决，再按照下面方式操作：</p>
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修改/etc/pam.d/login文件：<br>
</p>
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<span><u>复制代码</u></span>
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代码如下:</p>
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gedit /etc/pam.d/login</div>
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找到<br>
</p>
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<span><u>复制代码</u></span>
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<p>
代码如下:</p>
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auth pam_securetty.so</div>
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<br style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'><span style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'>修改成为下面的内容：</span></p>
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<span><u>复制代码</u></span>
</div>
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代码如下:</p>
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auth requisite pam_securetty.so</div>
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做完上面的操作之后，重启计算机。此时，使用root用户可以登录计算机了。</p>
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