Merge pull request #1629 from 2q1w2007/master

2q1w2007翻译完成

sources/tech/20140818 Disable reboot using Ctrl-Alt-Del Keys in RHEL or CentOS.md

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-2q1w2007翻译中
-Disable reboot using Ctrl-Alt-Del Keys in RHEL / CentOS
-================================================================================
-In Linux , It's a security concern for us  to allow anyone  to **reboot** the server using  **Ctrl-Alt-Del keys**. It is always recommended in production boxes that one should disable reboot uisng Ctrl-Alt-Del keys.
- 
-In this article we will discuss how can we disable reboot via above keys in RHEL & CentOS
-
-### For RHEL 5.X & CentOS 5.X ### 
-
-To prevent the **init** process from handling **Ctrl-Alt-Del**, edit the file  '**/etc/inittab**' comment the line which begins with '**ca::ctrlaltdel**:'  as shown below :
-
-    [root@localhost ~]# cat /etc/inittab
-    # Trap CTRL-ALT-DELETE
-    #ca::ctrlaltdel:/sbin/shutdown -t3 -r now
-
-We can also modify the line 'ca::ctrlaltdel:'  to generate logs , if anybody try to reboot the server using the keys ,
-
-    [root@localhost ~]# cat /etc/inittab
-    # Trap CTRL-ALT-DELETE
-    ca::ctrlaltdel:/bin/logger -p authpriv.warning -t init "Console-invoked Ctrl-Alt-Del was ignored"
-
-### For RHEL6.X & CentOS 6.X ###
-
-In RHEL 6.X / CentOS 6.X , reboot using the keys are handled by the file '**/etc/init/control-alt-delete.conf**'.
-
-**Step:1** Before making the changes , first take the backup using below command
-
-    [root@localhost ~]# cp -v /etc/init/control-alt-delete.conf /etc/init/control-alt-delete.override
-
-**Step:2** Edit the file , replacing the 'exec /sbin/shutdown' line with the following, which will simply generate a log entry each time Ctrl-Alt-Del is pressed:
-
-    [root@localhost ~]# cat /etc/init/control-alt-delete.conf
-    exec /usr/bin/logger -p authpriv.notice -t init "Ctrl-Alt-Del was pressed and ignored" 
-
---------------------------------------------------------------------------------
-
-via: http://www.linuxtechi.com/disable-reboot-using-ctrl-alt-del-keys/
-
-作者：[Pradeep Kumar][a]
-译者：[译者ID](https://github.com/译者ID)
-校对：[校对者ID](https://github.com/校对者ID)
-
-本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创翻译，[Linux中国](http://linux.cn/) 荣誉推出
-
-[a]:http://www.linuxtechi.com/author/pradeep/

translated/tech/20140818 Disable reboot using Ctrl-Alt-Del Keys in RHEL or CentOS.md

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+在RHEL / CentOS下停用按下Ctrl-Alt-Del 重启系统的功能
+================================================================================
+在Linux里，由于对安全的考虑，我们允许任何人按下**Ctrl-Alt-Del**来**重启**系统。但是在生产环境中，应该停用按下Ctrl-Alt-Del 重启系统的功能。
+
+在这篇文章里，我们将要介绍如何在RHEL和CentOS下停用该热键。
+
+### 在RHEL 5.X和CentOS 5.X下 ### 
+
+保护**init**进程免于**Ctrl-Alt-Del**,像下面一样编辑'**/etc/inittab**'里由'**ca::ctrlaltdel**:'开头的一行:
+
+    [root@localhost ~]# cat /etc/inittab
+    # Trap CTRL-ALT-DELETE
+    #ca::ctrlaltdel:/sbin/shutdown -t3 -r now
+
+我们还可以改变'ca::ctrlaltdel:'这行来输出日志 ,如果任何人想用该热键重启服务器,就会有日志,
+
+    [root@localhost ~]# cat /etc/inittab
+    # Trap CTRL-ALT-DELETE
+    ca::ctrlaltdel:/bin/logger -p authpriv.warning -t init "Console-invoked Ctrl-Alt-Del was ignored"
+
+### 在RHEL6.X和CentOS 6.X下 ###
+
+在RHEL6.X和CentOS 6.X下, 该热键的行为由'**/etc/init/control-alt-delete.conf**'控制.
+
+**第一步** 在变化之前，先用下列命令备份配置
+
+    [root@localhost ~]# cp -v /etc/init/control-alt-delete.conf /etc/init/control-alt-delete.override
+
+**第二步**编辑文件，把'exec /sbin/shutdown'这一行用下方配置代替，这个配置会在每次按下Ctrl-Alt-Del 时输出日志:
+
+    [root@localhost ~]# cat /etc/init/control-alt-delete.conf
+    exec /usr/bin/logger -p authpriv.notice -t init "Ctrl-Alt-Del was pressed and ignored" 
+
+--------------------------------------------------------------------------------
+
+via: http://www.linuxtechi.com/disable-reboot-using-ctrl-alt-del-keys/
+
+作者：[Pradeep Kumar][a]
+译者：[2q1w2007](https://github.com/2q1w2007)
+校对：[校对者ID](https://github.com/校对者ID)
+
+本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创翻译，[Linux中国](http://linux.cn/) 荣誉推出
+
+[a]:http://www.linuxtechi.com/author/pradeep/