blocks|key|221508|text|在命令行上，输入|type|unstyled|depth|inlineStyleRanges|entityRanges|data|221509|whoami|code-block|syntax|javascript|221510|或|221511|echo+"$USER"|221512|要将这些值保存到变量中，请执行以下操作|221513|myvariable=$(whoami)|221514|221515|myvariable=$USER|221516|当然，您不需要创建一个变量，因为这就是$USER变量的用途。|offset|length|style|CODE|221517|entityMap^0|0|0|0|0|0|0|0|0|J|5|0^^$0|@$1|2|3|4|5|6|7|Z|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|10|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|11|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|12|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|13|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|14|8|@]|9|@]|A|$E|F]]|$1|O|3|H|5|6|7|15|8|@]|9|@]|A|$]]|$1|P|3|Q|5|D|7|16|8|@]|9|@]|A|$E|F]]|$1|R|3|S|5|6|7|17|8|@$T|18|U|19|V|W]]|9|@]|A|$]]|$1|X|3|-4|5|6|7|1A|8|@]|9|@]|A|$]]]|Y|$]]

On the command line, enter

<pre><code>whoami
</code></pre>

or

<pre><code>echo "$USER"
</code></pre>

To save these values to a variable, do

<pre><code>myvariable=$(whoami)
</code></pre>

or

<pre><code>myvariable=$USER
</code></pre>

Of course, you don't need to make a variable since that is what the <code>$USER</code> variable is for.

blocks|key|4862|text|对于Bash、KornShell+(ksh)、sh等，您的许多问题都可以通过以下两种方式快速回答：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4863|man+[function]|code-block|syntax|javascript|4864|要获取您正在使用的系统的文档，或者通常更方便：|4865|谷歌"man+function“|4866|对于Linux和Unix略有不同的部分，这可能会给出不同的结果。|4867|对于这个问题，只需在shell中输入“question”即可。|4868|要编写脚本：|4869|myvar=$(whoami)|4870|entityMap|0|LINK|mutability|MUTABLE|url|https://en.wikipedia.org/wiki/Bash_%2528Unix_shell%2529|1|https://en.wikipedia.org/wiki/KornShell^0|I|3|N|2|2|4|0|7|9|1|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|16|8|@$9|17|A|18|B|C]|$9|19|A|1A|B|C]]|D|@$9|1B|A|1C|1|1D]|$9|1E|A|1F|1|1G]]|E|$]]|$1|F|3|G|5|H|7|1H|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|1I|8|@]|D|@]|E|$]]|$1|M|3|N|5|6|7|1J|8|@]|D|@]|E|$]]|$1|O|3|P|5|6|7|1K|8|@]|D|@]|E|$]]|$1|Q|3|R|5|6|7|1L|8|@]|D|@]|E|$]]|$1|S|3|T|5|6|7|1M|8|@]|D|@]|E|$]]|$1|U|3|V|5|H|7|1N|8|@]|D|@]|E|$I|J]]|$1|W|3|-4|5|6|7|1O|8|@]|D|@]|E|$]]]|X|$Y|$5|Z|10|11|E|$12|13]]|14|$5|Z|10|11|E|$12|15]]]]

For <a href="https://en.wikipedia.org/wiki/Bash_%28Unix_shell%29" rel="nofollow noreferrer">Bash</a>, <a href="https://en.wikipedia.org/wiki/KornShell" rel="nofollow noreferrer">KornShell</a> (<code>ksh</code>), <code>sh</code>, etc. Many of your questions are quickly answered by either:

<pre><code>man [function]
</code></pre>

to get the documentation for the system you are using or usually more conveniently:

google "man function"

This may give different results for some things where Linux and Unix have modest differences.

For this question, just enter "whoami" in your shell.

To script it:

<pre><code>myvar=$(whoami)
</code></pre>

blocks|key|221604|text|当需要root+(sudo)权限时(使用脚本时通常是90%25%2B权限)，前面答案中的方法总是将root作为答案。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|221605|获取当前的“登录”用户同样很简单，但它需要访问不同的变量：$SUDO_UID和$SUDO_USER。|221606|它们可以被附和：|221607|echo+$SUDO_UID
echo+$SUDO_USER|code-block|syntax|javascript|221608|或赋值，例如：|221609|myuid=$SUDO_UID
myuname=$SUDO_USER|221610|entityMap^0|19|4|0|T|9|13|A|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|X|8|@$9|Y|A|Z|B|C]|$9|10|A|11|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|12|8|@]|D|@]|E|$]]|$1|J|3|K|5|L|7|13|8|@]|D|@]|E|$M|N]]|$1|O|3|P|5|6|7|14|8|@]|D|@]|E|$]]|$1|Q|3|R|5|L|7|15|8|@]|D|@]|E|$M|N]]|$1|S|3|-4|5|6|7|16|8|@]|D|@]|E|$]]]|T|$]]

When root (sudo) permissions are required, which is usually 90%+ when using scripts, the methods in previous answers always give you <code>root</code> as the answer.

To get the current "logged in" user is just as simple, but it requires accessing different variables: <code>$SUDO_UID</code> and <code>$SUDO_USER</code>.

They can be echoed:

<pre><code>echo $SUDO_UID
echo $SUDO_USER
</code></pre>

Or assigned, for example:

<pre><code>myuid=$SUDO_UID
myuname=$SUDO_USER
</code></pre>

blocks|key|4961|text|使用标准的Unix/Linux/BSD/MacOS命令logname检索登录的用户。这忽略了环境和sudo，因为它们是不可靠的记者。它将始终打印登录的用户名，然后退出。这个命令大约在1981年就出现了。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4962|My-Mac:~+devin$+logname
devin
My-Mac:~+devin$+sudo+logname
Password:
devin
My-Mac:~+devin$+sudo+su+-
My-Mac:~+root#+logname
devin
My-Mac:~+root#+echo+$USER
root|code-block|syntax|javascript|4963|entityMap|0|LINK|mutability|MUTABLE|url|https://linux.die.net/man/1/logname^0|R|7|R|7|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@$9|V|A|W|1|X]]|E|$]]|$1|F|3|G|5|H|7|Y|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Z|8|@]|D|@]|E|$]]]|L|$M|$5|N|O|P|E|$Q|R]]]]

Use the standard Unix/Linux/BSD/MacOS command <a href="https://linux.die.net/man/1/logname" rel="noreferrer"><code>logname</code></a> to retrieve the logged in user. This ignores the environment as well as sudo, as these are unreliable reporters. It will always print the logged in user's name and then exit. This command has been around since about 1981.

<pre><code>My-Mac:~ devin$ logname
devin
My-Mac:~ devin$ sudo logname
Password:
devin
My-Mac:~ devin$ sudo su -
My-Mac:~ root# logname
devin
My-Mac:~ root# echo $USER
root
</code></pre>

blocks|key|221681|text|在Solaris+OS中，我使用了以下命令：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|221682|$+who+am+i+++++#+Remember+to+use+it+with+space.|code-block|syntax|javascript|221683|在Linux上-有人已经在评论中回答了这个问题。|221684|$+whoami+++++++#+Without+space|221685|entityMap|0|LINK|mutability|MUTABLE|url|https://en.wikipedia.org/wiki/Solaris_%2528operating_system%2529^0|1|7|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@$A|V|B|W|1|X]]|C|$]]|$1|D|3|E|5|F|7|Y|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|Z|8|@]|9|@]|C|$]]|$1|K|3|L|5|F|7|10|8|@]|9|@]|C|$G|H]]|$1|M|3|-4|5|6|7|11|8|@]|9|@]|C|$]]]|N|$O|$5|P|Q|R|C|$S|T]]]]

In <a href="https://en.wikipedia.org/wiki/Solaris_%28operating_system%29" rel="nofollow noreferrer">Solaris</a> OS I used this command:

<pre><code>$ who am i # Remember to use it with space.
</code></pre>

On Linux- Someone already answered this in comments.

<pre><code>$ whoami # Without space
</code></pre>

blocks|key|221702|text|获取当前任务的user_struct|type|unstyled|depth|inlineStyleRanges|entityRanges|data|221703|#define+get_current_user()++++++++++++++\
({++++++++++++++++++++++++++++++++++++++\
++++struct+user_struct+*__u;++++++++++++\
++++const+struct+cred+*__cred;++++++++++\
++++__cred+=+current_cred();++++++++++++\
++++__u+=+get_uid(__cred->user);++++++++\
++++__u;++++++++++++++++++++++++++++++++\
})|code-block|syntax|javascript|221704|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Get the current task's user_struct

<pre class="lang-c prettyprint-override"><code>#define get_current_user() \
({ \
 struct user_struct *__u; \
 const struct cred *__cred; \
 __cred = current_cred(); \
 __u = get_uid(__cred-&gt;user); \
 __u; \
})
</code></pre>

blocks|key|221751|text|当前用户的用户名可以通过${parameter@operator}参数扩展(在Bash4.4中引入)在纯Bash中获取：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|221752|$+:+\\u
$+printf+'%25s\n'+"${_@P}"|code-block|syntax|javascript|221753|通过设置存储在$_中的最后一个参数，使用内置的:+(true的同义词)代替临时变量。然后，我们将其展开(\u)，就好像它是一个带有P操作符的提示字符串。|221754|这比使用$USER更好，因为$USER只是一个常规的环境变量；它可以被修改、取消设置等。即使它不是故意篡改的，但仍然不正确的一个常见情况是，在没有启动登录shell+(su的默认设置)的情况下切换用户。|221755|entityMap^0|C|L|0|0|7|2|N|1|Q|4|1G|2|1T|1|0|4|5|E|5|2C|2|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|T|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|U|8|@$9|V|A|W|B|C]|$9|X|A|Y|B|C]|$9|Z|A|10|B|C]|$9|11|A|12|B|C]|$9|13|A|14|B|C]]|D|@]|E|$]]|$1|M|3|N|5|6|7|15|8|@$9|16|A|17|B|C]|$9|18|A|19|B|C]|$9|1A|A|1B|B|C]]|D|@]|E|$]]|$1|O|3|-4|5|6|7|1C|8|@]|D|@]|E|$]]]|P|$]]

The current user's username can be gotten in pure Bash with the <code>${parameter@operator}</code> parameter expansion (introduced in Bash 4.4):

<pre><code>$ : \\u
$ printf '%s\n' "${_@P}"
</code></pre>

The <code>:</code> built-in (synonym of <code>true</code>) is used instead of a temporary variable by setting the last argument, which is stored in <code>$_</code>. We then expand it (<code>\u</code>) as if it were a prompt string with the <code>P</code> operator.

This is better than using <code>$USER</code>, as <code>$USER</code> is just a regular environmental variable; it can be modified, unset, etc. Even if it isn't intentionally tampered with, a common case where it's still incorrect is when the user is switched without starting a login shell (<code>su</code>'s default).

blocks|key|221818|text|全,|type|unstyled|depth|inlineStyleRanges|entityRanges|data|221819|从我在这里看到的所有答案都是错误的，特别是如果你进入sudo模式，所有返回'root‘而不是登录的用户。答案是使用'who‘，找到'tty1’用户并提取出来。"w“命令的作用相同，var=$SUDO_USER将获取实际登录的用户。|221820|干杯!|221821|TBNK|221822|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|L|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|M|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

All,
From what I'm seeing here all answers are wrong, especially if you entered the sudo mode, with all returning 'root' instead of the logged in user. The answer is in using 'who' and finding eh 'tty1' user and extracting that. Thw &quot;w&quot; command works the same and var=$SUDO_USER gets the real logged in user.
Cheers!
TBNK

blocks|key|5178|text|这是一个很小的简单示例bash脚本，我创建它是为了将我的代码推送到我的个人gitlab上，它在我的提交消息中显示了我当前的用户名。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5179|#+!/bin/sh
#+This+example+script+is+for+pushing+my+code+to+gitlab+
echo+Starting+Push+for+user+:++$(whoami),+Please+enter+Commit+Message+
below:+
read+varMessage++
#+this+prompts+the+user+for+an+input+messsage+,+then+saves+the+result+in+
#+a+variable+
git+add+.+
git+commit+-m+"$(whoami):+$varMessage"+
git+push+-u+"url_of_project"+master|code-block|syntax|javascript|5180|我的个人gitlab中的结果提交消息看起来像这样：|5181|walexia+:+updated+Matplotib+example|5182|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

This is a small simple example bash script I made for pushing my code to my personal gitlab, it spits out my current username in my commit message.
<pre><code># !/bin/sh
# This example script is for pushing my code to gitlab 
echo Starting Push for user : $(whoami), Please enter Commit Message 
below: 
read varMessage 
# this prompts the user for an input messsage , then saves the result in 
# a variable 
git add . 
git commit -m &quot;$(whoami): $varMessage&quot; 
git push -u &quot;url_of_project&quot; master
</code></pre>
Resultant commit message in my personal gitlab looks like this:-
<pre><code>walexia : updated Matplotib example
</code></pre>

I am writing a program in Bash that needs to get the user's username.

I have heard of a thing called <a href="https://linux.die.net/man/1/whoami" rel="noreferrer"><code>whoami</code></a>, but I have no idea what it does or how to use it.

What command do I use to get the current username?

How can I get the current user's username in Bash?

Linux

MacOS

Unix

我正在用Bash编写一个需要获取用户用户名的程序。我听说过一种叫的东西，但我不知道它是做什么的，也不知道如何使用它。我应该使用什么命令来获取当前用户名？

问如何在Bash中获取当前用户的用户名？
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