blocks|key|1747634|text|我不久前就这么做了(同样是子级RVM切换器的情况)：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1747635|gem+list+%7C+cut+-d"+"+-f1+%7C+sudo+xargs+gem+uninstall+-Iax|code-block|syntax|javascript|1747636|获取所有gem的列表(包括版本)，将其剪切为仅保留gem名称，然后卸载此类gem的所有版本。|1747637|只有在系统范围内安装了gem时，sudo才有用，除非必要，否则不应包含在内。|offset|length|style|CODE|1747638|entityMap^0|0|0|0|G|4|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|T|8|@$K|U|L|V|M|N]]|9|@]|A|$]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

I did that not too long ago (same poster-child RVM switcher situation):

<pre><code>gem list | cut -d" " -f1 | sudo xargs gem uninstall -Iax
</code></pre>

Takes the list of all gems (incl. version stuff), cuts it to keep only the gem name, then uninstalls all versions of such gems.

The <code>sudo</code> is only useful if you had gems installed system-wide, and should not be included unless necessary.

blocks|key|1747679|text|稍有不同的版本，跳过剪切步骤，利用'--no-+version‘选项：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1747680|gem+list+--no-version+%7Cxargs+gem+uninstall+-ax|code-block|syntax|javascript|1747681|由于您要删除所有内容，因此我认为没有必要使用“i”选项。每当宝石被移除时，它都是好的。|1747682|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

A slighest different version, skipping the cut step, taking advantage of the '--no-version' option:

<pre><code>gem list --no-version |xargs gem uninstall -ax
</code></pre>

Since you are removing everything, I don't see the need for the 'I' option. Whenever the gem is removed, it's fine.

blocks|key|1961352|text|使用以下任一选项|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1961353|$+gem+list+--no-version+%7C+xargs+gem+uninstall+-ax|code-block|syntax|javascript|1961354|或|1961355|$+sudo+gem+list+--no-version+%7C+xargs+sudo+gem+uninstall+-ax|1961356|根据您的需要，您可能需要同时执行这两个列表，因为"gem+list“和"sudo+gem+list”提供了独立的列表。|1961357|不要把普通的"gem+list“和sudo-ed的"gem+uninstall”混在一起，否则你可能会卸载sudo安装的gem(前者)或者得到很多错误(后者)。|1961358|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|U|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|V|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

Use either

<pre><code>$ gem list --no-version | xargs gem uninstall -ax
</code></pre>

or

<pre><code>$ sudo gem list --no-version | xargs sudo gem uninstall -ax
</code></pre>

Depending on what you want, you may need to execute both, because "gem list" and "sudo gem list" provide independent lists.

Do not mix a normal "gem list" with a sudo-ed "gem uninstall" nor the other way around otherwise you may end up uninstalling sudo-installed gems (former) or getting a lot of errors (latter).

blocks|key|1961515|text|如果你喜欢使用ruby：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1961516|ruby+-e+"`gem+list`.split(/$/).each+{+%7Cline%7C+puts+`gem+uninstall+-Iax+#{line.split('+')[0]}`+unless+line.strip.empty?+}"|code-block|syntax|javascript|1961517|干杯|1961518|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

If you like doing it using ruby:

<pre><code>ruby -e "`gem list`.split(/$/).each { |line| puts `gem uninstall -Iax #{line.split(' ')[0]}` unless line.strip.empty? }"
</code></pre>

Cheers

blocks|key|1748130|text|您还可以构建一个新的Gemfile并运行bundle+clean+--force。这将删除所有其他没有包含在新的Gemfile中的gem。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1748131|entityMap^0|K|K|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

You could also build out a new Gemfile and run <code>bundle clean --force</code>. This will remove all other gems that aren't included in the new Gemfile.

blocks|key|1961732|text|当尝试删除作为root安装的gem时，xargs在尝试卸载默认gem时遇到错误时似乎会暂停：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1961733|sudo+gem+list+%7C+cut+-d"+"+-f1+%7C+xargs+gem+uninstall+-aIx
#+ERROR:++While+executing+gem+...+(Gem::InstallError)
#++++gem+"test-unit"+cannot+be+uninstalled+because+it+is+a+default+gem|code-block|syntax|javascript|1961734|这并不适用于所有人，但以下是我使用的方法：|1961735|sudo+for+gem+(`gem+list+%7C+cut+-d"+"+-f1`);+do+gem+uninstall+$gem+-aIx;+done|1961736|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|$]]

When trying to remove gems installed as root, xargs seems to halt when it encounters an error trying to uninstall a default gem:

<pre><code>sudo gem list | cut -d" " -f1 | xargs gem uninstall -aIx
# ERROR: While executing gem ... (Gem::InstallError)
# gem "test-unit" cannot be uninstalled because it is a default gem
</code></pre>

 
This won't work for everyone, but here's what I used instead:

<pre><code>sudo for gem (`gem list | cut -d" " -f1`); do gem uninstall $gem -aIx; done
</code></pre>

blocks|key|1961798|text|唯一的命令帮助我清理所有的gem，并忽略默认的gem，它不能被卸载。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1961799|for+x+in+`gem+list+--no-versions`;+do+gem+uninstall+$x+-a+-x+-I;+done|code-block|syntax|javascript|1961800|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|$]]

The only command helped me to cleanup all gems and ignores default gems, which can't be uninstalled

<pre><code>for x in `gem list --no-versions`; do gem uninstall $x -a -x -I; done
</code></pre>

blocks|key|1961864|text|如果您使用的是Rubygems版本2.1.0或更高版本，您可以尝试：gem+uninstall+--all。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1961865|entityMap^0|Y|J|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

If you are using Rubygems version 2.1.0 or later, you can try: <code>gem uninstall --all</code>.

blocks|key|1748557|text|Rubygems+>=+2.1.0|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1748558|gem+uninstall+-aIx|code-block|syntax|javascript|1748559|如果终端返回以下错误|1748560|ERROR:++While+executing+gem+...+(Gem::FilePermissionError)
You+don't+have+write+permissions+for+the+/Library/Ruby/Gems/2.0.0+directory.|1748561|然后编写上面的命令，如下所示|1748562|sudo+gem+uninstall+-aIx|1748563|并输入您的mac+os帐户密码完成！！|1748564|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|W|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|O|3|P|5|6|7|Y|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

Rubygems >= 2.1.0

<pre><code>gem uninstall -aIx
</code></pre>

If Terminal returns below error

<pre><code>ERROR: While executing gem ... (Gem::FilePermissionError)
You don't have write permissions for the /Library/Ruby/Gems/2.0.0 directory.
</code></pre>

Then write above command as below

<pre><code>sudo gem uninstall -aIx
</code></pre>

And enter your mac os account password
Done!!

blocks|key|1748813|text|首先，确保您的gem版本至少为2.1.0|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1748814|gem+update+--system
gem+--version
#+2.6.4|code-block|syntax|javascript|1748815|要卸载，只需运行：|1748816|gem+uninstall+--all|1748817|您可能需要使用sudo命令：|offset|length|style|CODE|1748818|sudo+gem+uninstall+--all|1748819|entityMap^0|0|0|0|0|7|4|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|$]]|$1|Q|3|R|5|D|7|11|8|@]|9|@]|A|$E|F]]|$1|S|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|T|$]]

First make sure you have at least gem version 2.1.0 

<pre><code>gem update --system
gem --version
# 2.6.4
</code></pre>

To uninstall simply run:

<pre><code>gem uninstall --all
</code></pre>

You may need to use the <code>sudo</code> command: 

<pre><code>sudo gem uninstall --all
</code></pre>

blocks|key|1962268|text|gem+list+--no-version+%7C+grep+-v+-e+'psych'+-e+'rdoc'+-e+'openssl'+-e+'json'+-e+'io-console'+-e+'bigdecimal'+%7C+xargs+sudo+gem+uninstall+-ax|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1962269|grep在这里排除了默认的gem。所有其他gem都将被卸载。你也可以在它前面加上sudo，以防出现权限问题。|unstyled|offset|length|style|CODE|1962270|entityMap^0|0|14|4|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|N|8|@$G|O|H|P|I|J]]|9|@]|A|$]]|$1|K|3|-4|5|F|7|Q|8|@]|9|@]|A|$]]]|L|$]]

<pre><code>gem list --no-version | grep -v -e 'psych' -e 'rdoc' -e 'openssl' -e 'json' -e 'io-console' -e 'bigdecimal' | xargs sudo gem uninstall -ax
</code></pre>

grep here is excluding default gems. All other gems will be uninstalled. You can also precede it with <code>sudo</code> in case you get permission issues.

blocks|key|1962481|text|对于那些因为想删除所有带有某个前缀的gem而来到这里的人(嗯，我正在看着你们aws-sdk!)你可以运行类似这样的命令：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1962482|gem+list+--no-version+%7C+grep+"aws-sdk-"+%7C+xargs+gem+uninstall+-aIx|code-block|syntax|javascript|1962483|显然在你的查询中放入而不是aws-sdk-。您需要其中的-I来忽略依赖项。|offset|length|style|CODE|1962484|采用形式安藤氏|1962485|entityMap^0|0|0|D|8|S|2|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@$I|T|J|U|K|L]|$I|V|J|W|K|L]]|9|@]|A|$]]|$1|M|3|N|5|6|7|X|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|P|$]]

And for those of you who are here because you want to remove all gems with a certain prefix (ahem I'm looking at you aws-sdk!) you can run something like this: 

<pre><code>gem list --no-version | grep "aws-sdk-" | xargs gem uninstall -aIx
</code></pre>

Obviously put in your query instead of <code>aws-sdk-</code>. You need the <code>-I</code> in there to ignore dependencies.

Adopted form Ando's <a href="https://stackoverflow.com/a/12644170/2187161">earlier answer</a>

There are instances where I would like to revert and uninstall all previous gem installations.

For instance, I needed to assist a friend migrate their rails development machine to use RVM. As they had been previously using the system-wide <code>gem</code>, he was experiencing many headaches when working with multiple projects. Essentially, he was the poster-child for an RVM convert.

How can I elegantly uninstall all of the gems on his OSX system?

Uninstall all installed gems, in OSX?

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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在某些情况下，我想还原并卸载所有以前安装的gem。例如，我需要帮助一位朋友迁移他们的rails开发机器以使用RVM。因为他们之前一直在使用系统范围的gem，所以他在处理多个项目时遇到了许多令人头疼的问题。从本质上讲，他是RVM转换的典范。我怎样才能优雅地卸载他的OSX系统上的所有gem？

问在OSX中卸载所有已安装的gem？
EN

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问在OSX中卸载所有已安装的gem？EN