How to Get Linux Server Sends Email Alert on Root Login如何获得Linux服务器发送电子邮件警报root登录

To improve the security of the server, especially web server which exposes to the Internet and possible worldwide hackers, it’s best to enable server to automatically send a notification email to predefined email address everytime someone logs in as root to the host.为了提高安全性的服务器， Web服务器尤其是其中暴露的互联网和全世界的黑客有可能，最好使服务器自动发送通知邮件到预定的电子邮件地址记录每次有人在根向东道国。 To configure the automatic email alert notification to a default email address on each incident of root log on on the server, use the following guide.要配置自动发出的电子邮件警告通知预设的电子邮件地址，每起事故的根源登录的服务器上，请使用下面的指南。

1. Login to the server via SSH using as root ID.登录到服务器通过SSH使用根编号。
2. Ensure that you’re at home directory of root.确保你在家里的根目录。 The open up the .bash_profile for editing using pico or vi by typing one of the following commands at command shell line:在开放。 bash_profile编辑使用峰或vi输入下列命令之一在命令行：

   pico .bash_profile峰。 bash_profile
   vi .bash_profile六。 bash_profile

3. Scroll down to the end of the file and add the following line:向下滚动到文件的末尾添加以下行：

   
echo 'ALERT - Root Shell Access on:' `date` `who` | mail -s "Alert: Root Access from `who | cut -d"(" -f2 | cut -d")" -f1`" user@example.com


   Replace user@email.com with the actual email account address that you want to the root access alert notification been sent to.替换user@email.com与实际的电子邮件帐户地址，您要访问的根源警报通知被送往。 Note that you can change the text contains in the email alert too.请注意，您可以改变文字包含在电子邮件中也警告。 The text starting with first ALERT is written as email body, and you can add in other info such as host name or change the wordings.文字开始的第一次书面通知的目的是作为电子邮件的身体，您可以添加其他信息，如主机名称或变更的字眼。 The second Alert is the email title which you can change to your own too.第二个警示是电子邮件标题，您可以改变自己太多。

Now logout and login again as root, you should receive an email alert at your inbox.现在，注销和重新登录为根，你应该收到一封电子邮件，提醒您的收件箱。 The security trick should works on most popular flavor of Linux such as RedHat, CentOS, Ubuntu, FreeBSD and etc.安全诱骗应当工程最流行的风味的Linux ，如红帽， CentOS ， Ubuntu的， FreeBSD和等

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