blocks|key|1892104|text|符号链接由内核处理，内核并不关心环境变量。所以，不是。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1892105|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Symbolic links are handled by the kernel, and the kernel does not care about environment variables. So, no.

blocks|key|1892194|text|即使符号链接是由内核解析的，您仍然可以使用LD_PRELOAD技巧，包装所有采用路径名的libc函数，并在'readlink‘返回的字符串中展开任何$XYZ组件(参数扩展)。然后将展开的路径提供给被包装的函数。正如jaztik所建议的，在创建链接时，您必须避开shell扩展中的目标路径。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1892195|由于注入的库具有对用户环境的完全访问权限，因此这将满足操作的所有期望。|1892196|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

Even though the symbolic links are resolved by the kernel, you could still do a LD_PRELOAD trick, wrapping all libc functions that take pathnames and expand any $XYZ components in the string returned by 'readlink' (parameter expansion). Then feed the expanded path to the wrapped function. You have to escape the target path from shell expansion when creating the link, as jaztik suggests.

As the injected library has full access to the users' environment, this will fulfill all expectations of the OP.

blocks|key|1896687|text|是。没问题。实际上，您不会在链接中实际使用$HOME变量，因此它不能用于智能解决方案，例如用户组。执行命令时，shell会转换变量，并在链接中使用变量的内容。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1896688|ln+-s+~/test+/tmp/test+|code-block|syntax|javascript|1896689|被扩展为|1896690|/<path>/<to>/home/test+->+/tmp/test|1896691|阿。并且只有调用ln的人的环境变量才会起作用。您不能在链接中存储其他人的环境变量。在调用该命令之前，将展开变量。|1896692|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

yes. no problem. actually you won't actually be using the $HOME variable in your link, so it won't work with smart solutions for groups of users for example. The variable is translated by the shell when executing the command, and the content of the variable is used in the link.

<pre><code>ln -s ~/test /tmp/test 
</code></pre>

is expaned to 

<pre><code>/&lt;path&gt;/&lt;to&gt;/home/test -&gt; /tmp/test
</code></pre>

Ah. and only the environment variables of the person calling ln will work. You can't store other peoples environment variables in the link. The variables are expanded before calling the command.

blocks|key|4670617|text|如果你不想扩展链接中的变量，你可以用单引号将它引起来，|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4670618|ln+-s+'$HOME/file/or/folder'+newname|code-block|syntax|javascript|4670619|这将给出，|4670620|newname+->+$HOME/file/or/folder|4670621|而不是将其扩展到本地设置的$HOME。正如在其他答案中所描述的，它根本不会扩展它。例如，你可以用它来符号链接到$HOME文件夹中的文件。|offset|length|style|CODE|4670622|请注意，这取决于系统-并非所有系统都支持变体符号链接|4670623|entityMap^0|0|0|0|0|1J|5|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|W|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|Y|8|@$M|Z|N|10|O|P]]|9|@]|A|$]]|$1|Q|3|R|5|6|7|11|8|@]|9|@]|A|$]]|$1|S|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|T|$]]

If you don't want to expand the variable in the link you can put single quotes around it,

<pre><code>ln -s '$HOME/file/or/folder' newname
</code></pre>

This would give,

<pre><code>newname -&gt; $HOME/file/or/folder
</code></pre>

rather than have it expand to your locally set $HOME. As described in other answers it will not expand it at all. So you can e.g. use it to symlink to a file inside the literal <code>$HOME</code> folder.

[Note this is system dependent - not all systems support variant symlinks]

blocks|key|3260456|text|我所能做到的最接近的方法是使用FUSE文件系统。使用fusepy编写自定义直通文件系统非常简单，它可以在确定要提供的实际文件时读取环境变量。当然，它只获取安装直通系统的进程的环境变量，所以它并不是那么有用。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3260457|entityMap^0|F|4|Q|6|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|M|8|@]|D|@]|E|$]]]|G|$]]

The closest I've been able to come is using a <code>FUSE</code> filesystem. It's pretty simple to use <code>fusepy</code> to write a custom passthrough filesystem, which can read environment variables when determining what real file to give. Of course, it only gets the environment variables of the process which mounted the passthrough system, so it's not as useful as it could be.

blocks|key|1149446|text|是的你可以。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1149447|ln+-s+$HOME/file/or/folder+newname|code-block|syntax|javascript|1149448|您也可以设置自己的变量并使用它们。在.bashrc+(或.bash_profile)中添加：|1149449|export+$MYPATH=/your/path|1149450|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|$]]

Yes you can.

<pre><code>ln -s $HOME/file/or/folder newname
</code></pre>

You can set your own variables and use them, too. Add in your .bashrc (or .bash_profile):

<pre><code>export $MYPATH=/your/path
</code></pre>

Can we use $HOME or other environment variable in symbolic links?

I know about using relative paths <code>../../.config</code> but sometimes are to many <code>../</code> :) something like <code>~/.config</code> would be more comfortable, or use of $HOME.

Edit:

<a href="https://stackoverflow.com/users/462620/habbie">habbie</a>'s answer with <a href="https://stackoverflow.com/users/333698/psmears">psmears</a>'s comment is the answer, sorry my question was incomplete.

While (as other answers show) you can use environment variables when creating symbolic links (as with any shell command!), you can't actually have environment variable (or '~') references in the symlink itself

Environment variables in symbolic links

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我们可以在符号链接中使用$HOME或其他环境变量吗？我知道使用相对路径../../.config，但有时对于许多../ :)像~/.config这样的东西会更舒服，或者使用$HOME。编辑：的回答加上的评论就是答案，对不起，我的问题不完整。虽然(正如其他答案所示)，您可以在创建符号链接时使用环境变量(与任何shell命令一样！)，但实际上不能在符号链接本身中引用环境变量(或'~')

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