rvm 安装 ruby 之后，必须执行 /bin/bash --login 才能执行 ruby 命令

<code class="language-ruby hljs  has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;">rvm use <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">2.3</span>.<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span> --default</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li></ul>

<code class="language-ruby hljs  has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"><span class="hljs-constant" style="box-sizing: border-box;">RVM</span> is <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">not</span> a function, selecting rubies with <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">'rvm use ...'</span> will <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">not</span> work.

<span class="hljs-constant" style="box-sizing: border-box;">You</span> need to change your terminal emulator preferences to allow login shell.
<span class="hljs-constant" style="box-sizing: border-box;">Sometimes</span> it is required to use `/bin/bash --login` as the command.
<span class="hljs-constant" style="box-sizing: border-box;">Please</span> visit <span class="hljs-symbol" style="color: rgb(0, 102, 102); box-sizing: border-box;">https:</span>/<span class="hljs-regexp" style="color: rgb(0, 136, 0); box-sizing: border-box;">/rvm.io/integration</span><span class="hljs-regexp" style="color: rgb(0, 136, 0); box-sizing: border-box;">/gnome-terminal/</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">for</span> an example.</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li></ul>

<code class="language-ruby hljs  has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;">echo <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">'[[ -s "$HOME/.rvm/scripts/rvm" ]] && . "$HOME/.rvm/scripts/rvm"'</span> >>~<span class="hljs-regexp" style="color: rgb(0, 136, 0); box-sizing: border-box;">/.bashrc
source ~/</span>.bashrc
ruby -v</code>