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How to Keep ‘sudo’ Password Timeout Session Longer in Linux
============================================================
In recent articles, we’ve showed you [10 Useful Sudoers Configurations in Linux][1] and [Let Sudo Insult You When You Enter Incorrect Password][2], and in this article, we discovered a another sudo tip that will help you to make sudo password sessions (timeout) longer or shorter in Ubuntu Linux.
In Ubuntu and its derivatives such as Linux Mint or any other Ubuntu-based distro, when you execute a [sudo command][3], it will prompt you to enter administrative password.
After you execute sudo command first time, the password will last for 15 minutes by default, so you don’t need to type password for every sudo command.
If, somehow you feel that the 15 minutes too long or short for some reason, you can change it with a easy tweak in sudoers file.
To set the sudo password timeout value, use the `passwd_timeout` parameter. First open the /etc/sudoers file with super user privileges using sudo and visudo commands like so:
```
$ sudo visudo
```
Then add the following defaults entry, it implies that the sudo password prompt will time out after 20 minutes once sudo is invoked by a user.
```
Defaults env_reset,timestamp_timeout=20
```
Note: You can set whatever time you want in minutes and make sure to wait before it times out. You can also set time to `0` if you want a password prompt for every sudo command you execute, or disable password prompt forever by setting the value `-1`.
The screen shot below show the defaults parameters I have set in my /ec/sudoers file.
[
![Change sudo Password Timeout](http://www.tecmint.com/wp-content/uploads/2017/01/set-sudo-password-timeout-session.png)
][4]
Change sudo Password Timeout
Save the file by pressing `[Ctrl + O]` and exit using `[Ctrl + X]`. Afterwards test if the setting is working by running a command with sudo and wait for 2 minutes to see if the password prompt will time out.
In this post, we explained how to set the number of minutes before the sudo password prompt times out, remember to share your thoughts concerning this article or perhaps other [useful sudeors configurations for system administrators][5] out there via the feedback section below.
--------------------------------------------------------------------------------
作者简介：
![](http://1.gravatar.com/avatar/4e444ab611c7b8c7bcb76e58d2e82ae0?s=128&d=blank&r=g)
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.
via: http://www.tecmint.com/set-sudo-password-timeout-session-longer-linux/
作者：[Aaron Kili ][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) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
[a]:http://www.tecmint.com/author/aaronkili/
[1]:http://www.tecmint.com/sudoers-configurations-for-setting-sudo-in-linux/
[2]:http://www.tecmint.com/sudo-insult-when-enter-wrong-password/
[3]:http://www.tecmint.com/su-vs-sudo-and-how-to-configure-sudo-in-linux/
[4]:http://www.tecmint.com/wp-content/uploads/2017/01/set-sudo-password-timeout-session.png
[5]:http://www.tecmint.com/sudoers-configurations-for-setting-sudo-in-linux/

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如何在 Linux 让 ‘sudo’ 密码会话超时更长些
============================================================
在最近的文章中，我们向你展示了[ Linux 中的 10 个有用的 sudoers 配置][1]以及[让 sudo 在输入不正确的密码时冒犯你][2]，在本文中，我们发现了另一个 sudo 贴士，在 Ubuntu Linux 中使 sudo 密码会话（超时）更长或更短。
在 Ubuntu 及其衍生版如 Linux Mint 或任何其他基于 Ubuntu 的发行版中，当你执行 [sudo command][3] 时，它将提示你输入管理密码。
在第一次执行 sudo 命令后，默认情况下密码将保持 15 分钟，因此你不需要为每个 sudo 命令键入密码。
如果，你因为某种原因觉得 15 分钟太长或太短，你可以在 sudoers 文件中做一个简单的调整。
要设置 sudo 密码超时值，请使用 `passwd_timeout` 参数。首先使用 sudo 和 visudo 命令以超级用户权限打开 /etc/sudoers 文件，如下所示：
```
$ sudo visudo
```
接着添加下面的默认值，这意味着 sudo 密码提示将会在用户使用 sudo 20 分钟后过期。
```
Defaults env_reset,timestamp_timeout=20
```
注意：你可以马上设置任何所需的时间，并确保在超时之前等待。 如果要为每个执行的 sudo 命令弹出密码提示，你也可以将时间设置为0，或者通过设置值 `-1` 永久禁用密码提示。
下面的截图显示了我在 /etc/sudoers 文件中设置的默认参数。
[
![Change sudo Password Timeout](http://www.tecmint.com/wp-content/uploads/2017/01/set-sudo-password-timeout-session.png)
][4]
改变 sudo 密码超时
按 `[Ctrl + O]` 保存文件，然后使用 `[Ctrl + X]` 退出。 然后，使用 sudo 运行命令并等待 2 分钟以检查密码提示是否超时以测试设置是否正常。
在本篇中，我们解释了如何设置 sudo 密码提示超时之前的分钟数，记得在评论栏分享你对这篇文章的想法或者其他[对系统管理员配置有用的 sudo 配置][5]。
--------------------------------------------------------------------------------
作者简介：
![](http://1.gravatar.com/avatar/4e444ab611c7b8c7bcb76e58d2e82ae0?s=128&d=blank&r=g)
Aaron Kili 是 Linux 和 F.O.S.S 爱好者，将来的 Linux SysAdmin 以及 web 开发人员，目前是 TecMint 的内容创建者，他喜欢用电脑工作，并坚信分享知识。
via: http://www.tecmint.com/set-sudo-password-timeout-session-longer-linux/
作者：[Aaron Kili ][a]
译者：[geekpi](https://github.com/geekpi)
校对：[校对者ID](https://github.com/校对者ID)
本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
[a]:http://www.tecmint.com/author/aaronkili/
[1]:http://www.tecmint.com/sudoers-configurations-for-setting-sudo-in-linux/
[2]:http://www.tecmint.com/sudo-insult-when-enter-wrong-password/
[3]:http://www.tecmint.com/su-vs-sudo-and-how-to-configure-sudo-in-linux/
[4]:http://www.tecmint.com/wp-content/uploads/2017/01/set-sudo-password-timeout-session.png
[5]:http://www.tecmint.com/sudoers-configurations-for-setting-sudo-in-linux/