update decisiontree regression problem details
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<h3 id="配置yum源"><a href="#配置yum源" class="headerlink" title="配置yum源"></a>配置yum源</h3><ul>
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<li>下载 repo 文件:<br><a target="_blank" rel="noopener" href="http://mirrors.aliyun.com/repo/Centos-7.repo">Centos-7.repo</a><br>并上传到<code>/tmp</code>,进入到<code>/tmp</code></li>
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<li>备份并且替换系统的repo文件<figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line"> <span class="built_in">cp</span> Centos-7.repo /etc/yum.repos.d/ </span><br><span class="line"><span class="built_in">cd</span> /etc/yum.repos.d/ </span><br><span class="line"><span class="built_in">mv</span> CentOS-Base.repo CentOS-Base.repo.bak </span><br><span class="line"><span class="built_in">mv</span> Centos-7.repo CentOS-Base.repo</span><br></pre></td></tr></table></figure></li>
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@@ -208,7 +208,7 @@
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<li><p>将 <code>/home/hadoop/bin</code>添加到hadoop用户的环境变量,需要切换到<code>hadoop</code>用户</p>
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<figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line"><span class="built_in">echo</span> <span class="string">'export PATH=$PATH:/home/hadoop/bin'</span> >> ~/.bashrc && <span class="built_in">source</span> ~/.bashrc</span><br><span class="line">scp_all.sh /home/hadoop/.bashrc /home/hadoop/</span><br><span class="line">ssh_all.sh <span class="built_in">source</span> ~/.bashrc </span><br></pre></td></tr></table></figure></li>
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</ul>
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</article><div class="post-copyright"><div class="post-copyright__author"><span class="post-copyright-meta"><i class="fas fa-circle-user fa-fw"></i>文章作者: </span><span class="post-copyright-info"><a href="https://rq.shenjianl.cn">shenjianZ</a></span></div><div class="post-copyright__type"><span class="post-copyright-meta"><i class="fas fa-square-arrow-up-right fa-fw"></i>文章链接: </span><span class="post-copyright-info"><a href="https://rq.shenjianl.cn/posts/61253.html">https://rq.shenjianl.cn/posts/61253.html</a></span></div><div class="post-copyright__notice"><span class="post-copyright-meta"><i class="fas fa-circle-exclamation fa-fw"></i>版权声明: </span><span class="post-copyright-info">本博客所有文章除特别声明外,均采用 <a href="https://qr.shenjianl.cn/licenses/by-nc-sa/4.0/" target="_blank">CC BY-NC-SA 4.0</a> 许可协议。转载请注明来自 <a href="https://rq.shenjianl.cn" target="_blank">QuickReference</a>!</span></div></div><div class="tag_share"><div class="post-meta__tag-list"></div><div class="post_share"><div class="social-share" data-image="/img/avatar.jpg" data-sites="facebook,twitter,wechat,weibo,qq"></div><link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/butterfly-extsrc@1.1.3/sharejs/dist/css/share.min.css" media="print" onload="this.media='all'"><script src="https://cdn.jsdelivr.net/npm/butterfly-extsrc@1.1.3/sharejs/dist/js/social-share.min.js" defer></script></div></div><nav class="pagination-post" id="pagination"><div class="prev-post pull-left"><a href="/posts/29139.html" title="k近邻算法(K-Nearest Neighbors)KNN"><div class="cover" style="background: var(--default-bg-color)"></div><div class="pagination-info"><div class="label">上一篇</div><div class="prev_info">k近邻算法(K-Nearest Neighbors)KNN</div></div></a></div><div class="next-post pull-right"><a href="/posts/61252.html" title="Hadoop集群HDFS配置"><div class="cover" style="background: var(--default-bg-color)"></div><div class="pagination-info"><div class="label">下一篇</div><div class="next_info">Hadoop集群HDFS配置</div></div></a></div></nav></div><div class="aside-content" id="aside-content"><div class="card-widget card-info"><div class="is-center"><div class="avatar-img"><img src="/img/avatar.jpg" onerror="this.onerror=null;this.src='/img/friend_404.gif'" alt="avatar"/></div><div class="author-info__name">shenjianZ</div><div class="author-info__description">一份快捷简便的文档,便于查阅编程的细节</div></div><div class="card-info-data site-data is-center"><a href="/archives/"><div class="headline">文章</div><div class="length-num">13</div></a><a href="/tags/"><div class="headline">标签</div><div class="length-num">4</div></a><a href="/categories/"><div class="headline">分类</div><div class="length-num">1</div></a></div><a id="card-info-btn" target="_blank" rel="noopener" href="https://github.com/shenjianz"><i class="fab fa-github"></i><span>Follow Me</span></a><div class="card-info-social-icons is-center"><a class="social-icon" href="https://github.com/shenjianZ" target="_blank" title="Github"><i class="fab fa-github" style="color: #24292e;"></i></a><a class="social-icon" href="mailto:15202078626@163.com" target="_blank" title="Email"><i class="fas fa-envelope" style="color: #4a7dbe;"></i></a></div></div><div class="card-widget card-announcement"><div class="item-headline"><i class="fas fa-bullhorn fa-shake"></i><span>公告</span></div><div class="announcement_content">一个简单快捷的文档知识点查阅网站</div></div><div class="sticky_layout"><div class="card-widget" id="card-toc"><div class="item-headline"><i class="fas fa-stream"></i><span>目录</span><span class="toc-percentage"></span></div><div class="toc-content is-expand"><ol class="toc"><li class="toc-item toc-level-3"><a class="toc-link" href="#%E9%98%B2%E7%81%AB%E5%A2%99%E5%85%B3%E9%97%AD"><span class="toc-number">1.</span> <span class="toc-text">防火墙关闭</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#%E9%85%8D%E7%BD%AEyum%E6%BA%90"><span class="toc-number">2.</span> <span class="toc-text">配置yum源</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#JDK%E5%AE%89%E8%A3%85"><span class="toc-number">3.</span> <span class="toc-text">JDK安装</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#%E4%BF%AE%E6%94%B9%E4%B8%BB%E6%9C%BA%E5%90%8D%E5%92%8C%E4%B8%BB%E6%9C%BA%E5%90%8D%E6%98%A0%E5%B0%84"><span class="toc-number">4.</span> <span class="toc-text">修改主机名和主机名映射</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#%E5%88%9B%E5%BB%BAhadoop%E7%94%A8%E6%88%B7"><span class="toc-number">5.</span> <span class="toc-text">创建hadoop用户</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#%E7%A6%81%E6%AD%A2%E9%9D%9E-wheel-%E7%BB%84%E7%94%A8%E6%88%B7%E5%88%87%E6%8D%A2%E5%88%B0root%EF%BC%8C%E9%85%8D%E7%BD%AE%E5%85%Line truncated
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</article><div class="post-copyright"><div class="post-copyright__author"><span class="post-copyright-meta"><i class="fas fa-circle-user fa-fw"></i>文章作者: </span><span class="post-copyright-info"><a href="https://rq.shenjianl.cn">shenjianZ</a></span></div><div class="post-copyright__type"><span class="post-copyright-meta"><i class="fas fa-square-arrow-up-right fa-fw"></i>文章链接: </span><span class="post-copyright-info"><a href="https://rq.shenjianl.cn/posts/61253.html">https://rq.shenjianl.cn/posts/61253.html</a></span></div><div class="post-copyright__notice"><span class="post-copyright-meta"><i class="fas fa-circle-exclamation fa-fw"></i>版权声明: </span><span class="post-copyright-info">本博客所有文章除特别声明外,均采用 <a href="https://qr.shenjianl.cn/licenses/by-nc-sa/4.0/" target="_blank">CC BY-NC-SA 4.0</a> 许可协议。转载请注明来自 <a href="https://rq.shenjianl.cn" target="_blank">QuickReference</a>!</span></div></div><div class="tag_share"><div class="post-meta__tag-list"></div><div class="post_share"><div class="social-share" data-image="/img/avatar.jpg" data-sites="facebook,twitter,wechat,weibo,qq"></div><link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/butterfly-extsrc@1.1.3/sharejs/dist/css/share.min.css" media="print" onload="this.media='all'"><script src="https://cdn.jsdelivr.net/npm/butterfly-extsrc@1.1.3/sharejs/dist/js/social-share.min.js" defer></script></div></div><nav class="pagination-post" id="pagination"><div class="prev-post pull-left"><a href="/posts/61252.html" title="Hadoop集群HDFS配置"><div class="cover" style="background: var(--default-bg-color)"></div><div class="pagination-info"><div class="label">上一篇</div><div class="prev_info">Hadoop集群HDFS配置</div></div></a></div><div class="next-post pull-right"><a href="/posts/16107.html" title="Hello World"><div class="cover" style="background: var(--default-bg-color)"></div><div class="pagination-info"><div class="label">下一篇</div><div class="next_info">Hello World</div></div></a></div></nav></div><div class="aside-content" id="aside-content"><div class="card-widget card-info"><div class="is-center"><div class="avatar-img"><img src="/img/avatar.jpg" onerror="this.onerror=null;this.src='/img/friend_404.gif'" alt="avatar"/></div><div class="author-info__name">shenjianZ</div><div class="author-info__description">一份快捷简便的文档,便于查阅编程的细节</div></div><div class="card-info-data site-data is-center"><a href="/archives/"><div class="headline">文章</div><div class="length-num">17</div></a><a href="/tags/"><div class="headline">标签</div><div class="length-num">8</div></a><a href="/categories/"><div class="headline">分类</div><div class="length-num">2</div></a></div><a id="card-info-btn" target="_blank" rel="noopener" href="https://github.com/shenjianz"><i class="fab fa-github"></i><span>Follow Me</span></a><div class="card-info-social-icons is-center"><a class="social-icon" href="https://github.com/shenjianZ" target="_blank" title="Github"><i class="fab fa-github" style="color: #24292e;"></i></a><a class="social-icon" href="mailto:15202078626@163.com" target="_blank" title="Email"><i class="fas fa-envelope" style="color: #4a7dbe;"></i></a></div></div><div class="card-widget card-announcement"><div class="item-headline"><i class="fas fa-bullhorn fa-shake"></i><span>公告</span></div><div class="announcement_content">一个简单快捷的文档知识点查阅网站</div></div><div class="sticky_layout"><div class="card-widget" id="card-toc"><div class="item-headline"><i class="fas fa-stream"></i><span>目录</span><span class="toc-percentage"></span></div><div class="toc-content is-expand"><ol class="toc"><li class="toc-item toc-level-3"><a class="toc-link" href="#%E9%98%B2%E7%81%AB%E5%A2%99%E5%85%B3%E9%97%AD"><span class="toc-number">1.</span> <span class="toc-text">防火墙关闭</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#%E9%85%8D%E7%BD%AEyum%E6%BA%90"><span class="toc-number">2.</span> <span class="toc-text">配置yum源</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#JDK%E5%AE%89%E8%A3%85"><span class="toc-number">3.</span> <span class="toc-text">JDK安装</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#%E4%BF%AE%E6%94%B9%E4%B8%BB%E6%9C%BA%E5%90%8D%E5%92%8C%E4%B8%BB%E6%9C%BA%E5%90%8D%E6%98%A0%E5%B0%84"><span class="toc-number">4.</span> <span class="toc-text">修改主机名和主机名映射</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#%E5%88%9B%E5%BB%BAhadoop%E7%94%A8%E6%88%B7"><span class="toc-number">5.</span> <span class="toc-text">创建hadoop用户</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#%E7%A6%81%E6%AD%A2%E9%9D%9E-wheel-%E7%BB%84%E7%94%A8%E6%88%B7%E5%88%87%E6%8D%A2%E5%88%B0root%EF%BC%8C%E9%85%8D%E7%BD%AE%E5%85%8D%E5%AF%86%E5%88%87%E6%8D%A2root"><span class="toc-number">Line truncated
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