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4.1 KiB
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97 lines
4.1 KiB
Markdown
Let Sudo Insult You When You Enter Incorrect Password
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============================================================
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Sudoers is the default sudo security policy plugin in Linux, however, experienced system administrators can specify a custom security policy as well as input and output logging plugins. It is driven by the `/etc/sudoers`file or alternatively in LDAP.
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You can define sudoers insults option or several others in the file above. It is set under defaults entries section. Read through our last article that explains [10 Useful Sudoers Configurations for Setting ‘sudo’ in Linux][1].
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In this article, we will explain a sudoers configuration parameter to enable an individual or system administrator set [sudo command][2] to insult system users who enter wrong password.
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Start by opening the file `/etc/sudoers` like so:
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```
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$ sudo visudo
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```
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Go to the defaults section and add the following line:
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```
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Defaults insults
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```
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Below is a sample of /etc/sudoers file on my system showing defaults entries.
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[
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][3]
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Set sudo Insults Parameter
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From the screenshot above, you can see that there are many other defaults defined such as send mail to root when each time a user enters a bad password, set a secure path, configure a custom sudo log file and more.
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Save the file and close it.
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Run a command with sudo and enter the wrong password, then observe how insults option works:
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```
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$ sudo visudo
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```
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[
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][4]
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sudo Insult in Action
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Note: When you configure the insults parameter, it disables the `badpass_message` parameter which prints a specific message on the command line (the default message is “sorry, try again”) in case a user enters a wrong password.
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To modify the message, add the `badpass_message` parameter to the /etc/sudoers file as shown below.
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```
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Defaults badpass_message="Password is wrong, please try again" #try to set a message of your own
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```
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[
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][5]
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Set sudo badpassword Message
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Save the file and close it, then invoke sudo and see how it works, the message you set as the value of badpass_message will be printed every time you or any system user types a wrong password.
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```
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$ sudo visudo
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```
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[
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][6]
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Sudo badpassword Message
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That’s all, in this article we reviewed how to set sudo to print insults when users type a wrong password. Do share your thoughts via the comment section below.
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--------------------------------------------------------------------------------
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作者简介：
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Aaron Kili is a Linux and F.O.S.S enthusiast, an upcoming Linux SysAdmin, web developer, and currently a content creator for TecMint who loves working with computers and strongly believes in sharing knowledge.
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--------------------------------------------------------------------------------
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via: http://www.tecmint.com/sudo-insult-when-enter-wrong-password/
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作者：[Aaron Kili][a]
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译者：[译者ID](https://github.com/译者ID)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
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[a]:http://www.tecmint.com/author/aaronkili/
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[1]:http://www.tecmint.com/sudoers-configurations-for-setting-sudo-in-linux/
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[2]:http://www.tecmint.com/su-vs-sudo-and-how-to-configure-sudo-in-linux/
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[3]:http://www.tecmint.com/wp-content/uploads/2017/01/Set-sudo-Insults-Parameter.png
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[4]:http://www.tecmint.com/wp-content/uploads/2017/01/How-sudo-Insult-Works.png
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[5]:http://www.tecmint.com/wp-content/uploads/2017/01/Set-sudo-badpassword-Message.png
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[6]:http://www.tecmint.com/wp-content/uploads/2017/01/sudo-badpassword-Message.png
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