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How To Display Asterisks When You Type Password In terminal
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======
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When you type passwords in a web browser login or any GUI login, the passwords will be masked as asterisks like 0_sync_master.sh 1_add_new_article_manual.sh 1_add_new_article_newspaper.sh 2_start_translating.sh 3_continue_the_work.sh 4_finish.sh 5_pause.sh base.sh env format.test lctt.cfg parse_url_by_manual.sh parse_url_by_newspaper.py parse_url_by_newspaper.sh README.org reedit.sh reformat.sh or bullets like •••••••••••••. This is the built-in security mechanism to prevent the users near you to view your password. But when you type the password in Terminal to perform any administrative task with **sudo** or **su** , you won't even the see the asterisks or bullets as you type the password. There won't be any visual indication of entering passwords, there won't be any cursor movement, nothing at all. You will not know whether you entered all characters or not. All you will see just a blank screen!
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Look at the following screenshot.
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![][2]
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As you see in the above image, I've already entered the password, but there was no indication (either asterisks or bullets). Now, I am not sure whether I entered all characters in my password or not. This security mechanism also prevents the person near you to guess the password length. Of course, this behavior can be changed. This is what this guide all about. It is not that difficult. Read on!
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#### Display Asterisks When You Type Password In terminal
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To display asterisks as you type password in Terminal, we need to make a small modification in **" /etc/sudoers"** file. Before making any changes, it is better to backup this file. To do so, just run:
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```
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sudo cp /etc/sudoers{,.bak}
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```
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The above command will backup /etc/sudoers file to a new file named /etc/sudoers.bak. You can restore it, just in case something went wrong after editing the file.
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Next, edit **" /etc/sudoers"** file using command:
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```
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sudo visudo
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```
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Find the following line:
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```
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Defaults env_reset
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```
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![][3]
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Add an extra word **" ,pwfeedback"** to the end of that line as shown below.
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```
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Defaults env_reset,pwfeedback
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```
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![][4]
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Then, press **" CTRL+x"** and **" y"** to save and close the file. Restart your Terminal to take effect the changes.
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Now, you will see asterisks when you enter password in Terminal.
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![][5]
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If you're not comfortable to see a blank screen when you type passwords in Terminal, the small tweak will help. Please be aware that the other users can predict the password length if they see the password when you type it. If you don't mind it, go ahead make the changes as described above to make your password visible (masked as asterisks, of course!).
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And, that's all for now. More good stuffs to come. Stay tuned!
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Cheers!
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--------------------------------------------------------------------------------
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via: https://www.ostechnix.com/display-asterisks-type-password-terminal/
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作者：[SK][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]:https://www.ostechnix.com/author/sk/
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[2]:http://www.ostechnix.com/wp-content/uploads/2018/01/password-1.png ()
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[3]:http://www.ostechnix.com/wp-content/uploads/2018/01/visudo-1.png ()
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[4]:http://www.ostechnix.com/wp-content/uploads/2018/01/visudo-1-1.png ()
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[5]:http://www.ostechnix.com/wp-content/uploads/2018/01/visudo-2.png ()
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@ -0,0 +1,70 @@
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如何在终端输入密码时显示星号
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======
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当你在 Web 浏览器或任何 GUI 登录中输入密码时，密码会被标记成星号 ******** 或圆形符号 ••••••••••••• 。这是内置的安全机制，以防止你附近的用户看到你的密码。但是当你在终端输入密码来执行任何 **sudo** 或 **su** 的管理任务时，你不会在输入密码的时候看见星号或者圆形符号。它不会有任何输入密码的视觉指示，也不会有任何光标移动，什么也没有。你不知道你是否输入了所有的字符。你只会看到一个空白的屏幕！
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看看下面的截图。
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![][2]
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正如你在上面的图片中看到的，我已经输入了密码，但没有任何指示（星号或圆形符号）。现在，我不确定我是否输入了所有密码。这个安全机制也可以防止你附近的人猜测密码长度。当然，这种行为可以改变。这是本指南要说的。这并不困难。请继续阅读。
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#### 当你在终端输入密码时显示星号
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要在终端输入密码时显示星号，我们需要在 **“/etc/sudoers”** 中做一些小修改。在做任何更改之前，最好备份这个文件。为此，只需运行：
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```
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sudo cp /etc/sudoers{,.bak}
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```
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上述命令将 /etc/sudoers 备份成名为 /etc/sudoers.bak。你可以恢复它，以防万一在编辑文件后出错。
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接下来，使用下面的命令编辑 **“/etc/sudoers”**：
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```
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sudo visudo
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```
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找到下面这行：
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```
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Defaults env_reset
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```
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![][3]
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在该行的末尾添加一个额外的单词 **“,pwfeedback”**，如下所示。
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```
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Defaults env_reset,pwfeedback
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```
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![][4]
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然后，按下 **“CTRL + x”** 和 **“y”** 保存并关闭文件。重新启动终端以使更改生效。
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现在，当你在终端输入密码时，你会看到星号。
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![][5]
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如果你对在终端输入密码时看不到密码感到不舒服，那么这个小技巧会有帮助。请注意，当你输入输入密码时其他用户就可以预测你的密码长度。如果你不介意，请按照上述方法进行更改，以使你的密码可见（当然，标记为星号！）。
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现在就是这样了。还有更好的东西。敬请关注！
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干杯!
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--------------------------------------------------------------------------------
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via: https://www.ostechnix.com/display-asterisks-type-password-terminal/
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作者：[SK][a]
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译者：[geekpi](https://github.com/geekpi)
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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]:https://www.ostechnix.com/author/sk/
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[2]:http://www.ostechnix.com/wp-content/uploads/2018/01/password-1.png ()
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[3]:http://www.ostechnix.com/wp-content/uploads/2018/01/visudo-1.png ()
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[4]:http://www.ostechnix.com/wp-content/uploads/2018/01/visudo-1-1.png ()
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[5]:http://www.ostechnix.com/wp-content/uploads/2018/01/visudo-2.png ()
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