blocks|key|1383751|text|我不是很确定，但这可能会有帮助：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1383752|update-alternatives+--config+ruby|code-block|syntax|javascript|1383753|..。这是一种非交互式的、可脚本化的方式：|1383754|update-alternatives+--set+ruby+/usr/bin/ruby1.9.1|1383755|您可以通过执行以下操作来了解可用的替代方案和相应的/usr/bin/...路径：|offset|length|style|CODE|1383756|update-alternatives+--query+ruby|1383757|entityMap^0|0|0|0|0|P|C|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|$]]

I'm not really sure, but maybe this can help:

<pre><code>update-alternatives --config ruby
</code></pre>

... and here's the non-interactive, scriptable, way:

<pre><code>update-alternatives --set ruby /usr/bin/ruby1.9.1
</code></pre>

You may find out about available alternatives and respective <code>/usr/bin/...</code> paths by doing:

<pre><code>update-alternatives --query ruby
</code></pre>

blocks|key|1168800|text|试试这个：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1168801|sudo+apt-get+install+ruby1.9.1+rubygems1.9.1|code-block|syntax|javascript|1168802|或者尝试从源代码开始构建。这在我的ubuntu9.04上是有效的，在重启1.9之后是标准的ruby|1168803|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|$]]

Try this:

<pre><code>sudo apt-get install ruby1.9.1 rubygems1.9.1
</code></pre>

or try building from source. this worked for me on ubuntu 9.04 and after a restart 1.9 was the standard ruby

blocks|key|1168893|text|Martin+-查看以下链接：http://ryanbigg.com/2010/12/ubuntu-ruby-rvm-rails-and-you/|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1168894|这就是在ubuntu服务器上安装ruby的方向。这不仅可以让你在需要时切换到ruby版本，而且还可以根据ruby版本等保持gem的分离。|1168895|entityMap|0|LINK|mutability|MUTABLE|url|http://ryanbigg.com/2010/12/ubuntu-ruby-rvm-rails-and-you/^0|F|1M|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]]|C|$]]|$1|D|3|E|5|6|7|R|8|@]|9|@]|C|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]]]

Martin - Take a look at the following link: <a href="http://ryanbigg.com/2010/12/ubuntu-ruby-rvm-rails-and-you/" rel="nofollow">http://ryanbigg.com/2010/12/ubuntu-ruby-rvm-rails-and-you/</a>

This is where installation of ruby is heading for ubuntu servers. This should allow you to not only switch to a ruby version when needed, but also keep gems separated based on ruby versions, etc.

blocks|key|1168983|text|您也可以使用以下命令完全删除Ruby+1.8：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1168984|sudo+apt-get+remove+libruby1.8+ruby1.8+ruby1.8-dev+rubygems1.8|code-block|syntax|javascript|1168985|在此之后，您将只安装Ruby1.9。|1168986|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|$]]

You can completely remove Ruby 1.8 too with:

<pre><code>sudo apt-get remove libruby1.8 ruby1.8 ruby1.8-dev rubygems1.8
</code></pre>

After that, you will only have Ruby 1.9 installed.

blocks|key|1169095|text|sudo+\curl+-L+https://get.rvm.io+%7C+bash+-s+stable+--ruby+--rails|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1169096|将安装最新版本的ruby+(和rails)，并允许您避免Ubuntu的RVM崩溃，请参阅https://stackoverflow.com/a/9056395/497756。|unstyled|offset|length|1169097|如果你走这条路，去掉Ubuntu安装的版本和相关的软件包，比如bundle。|style|CODE|1169098|详情请访问：https://rvm.io/rvm/install/|1169099|(注:这是henry74发布的TL;DR版本。)|1169100|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/9056395/497756|1|https://rvm.io/rvm/install/^0|0|18|16|0|0|V|6|0|6|R|1|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|11|8|@]|9|@$G|12|H|13|1|14]]|A|$]]|$1|I|3|J|5|F|7|15|8|@$G|16|H|17|K|L]]|9|@]|A|$]]|$1|M|3|N|5|F|7|18|8|@]|9|@$G|19|H|1A|1|1B]]|A|$]]|$1|O|3|P|5|F|7|1C|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|F|7|1D|8|@]|9|@]|A|$]]]|R|$S|$5|T|U|V|A|$W|X]]|Y|$5|T|U|V|A|$W|Z]]]]

<pre><code>sudo \curl -L https://get.rvm.io | bash -s stable --ruby --rails
</code></pre>

will install an up-to-date version of ruby (and rails), and allow you to avoid brokenness of Ubuntu's RVM, see <a href="https://stackoverflow.com/a/9056395/497756">https://stackoverflow.com/a/9056395/497756</a>.

If you go this route, get rid of Ubuntu-installed versions and associated packages like <code>bundle</code>.

Details here: <a href="https://rvm.io/rvm/install/" rel="nofollow noreferrer">https://rvm.io/rvm/install/</a>

(Note: this is the TL;DR version of the post by henry74.)

Is there any way, on Ubuntu 9.04, to install Ruby 1.8 as <code>ruby1.8</code> (or get rid of it altogether) and have Ruby 1.9 be the default <code>ruby</code>?

How do I make Ruby 1.9 the default Ruby on Ubuntu?

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在Ubuntu9.04上，有没有办法把Ruby1.8安装成ruby1.8 (或者干脆把它去掉)，把Ruby1.9作为默认的ruby

问如何让Ruby 1.9成为Ubuntu上的默认Ruby？
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