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id="search-button"><a class="social-icon search"><svg class="icon" aria-hidden="true"><use xlink:href="#icon-sousuo"></use></svg><span> 搜索</span></a></div><div id="darkmodeBt"><a class="darkmode switch"><svg class="icon" aria-hidden="true"><use xlink:href="#icon-deng1"></use></svg><span id="darkmode-switch"> 关灯</span></a></div><div id="toggle-menu"><a class="site-page"><svg class="icon" aria-hidden="true"><use xlink:href="#icon-mulu"></use></svg></a></div></div></div></nav></header><main class="layout hide-aside" id="content-inner"><div id="post"><div id="post-info"><h1 class="post-title">Oracle Cloud必要操作</h1><div id="post-meta"><div class="tag-cloud-list is-center"><a href="/tags/Oracle-Cloud/" style="font-size: 1.5em; color: rgb(151, 113, 129)">Oracle Cloud</a></div><div class="meta-firstline"><span class="post-meta-date"><svg class="icon" aria-hidden="true"><use xlink:href="#icon-rili"></use></svg><span class="post-meta-label">发表于</span><time class="post-meta-date-created" datetime="2022-11-27T05:11:17.470Z" title="发表于 2022-11-27 05:11:17">2022-11-27</time><span class="post-meta-separator">|</span><svg class="icon" aria-hidden="true"><use xlink:href="#icon-shijian"></use></svg><span class="post-meta-label">更新于</span><time class="post-meta-date-updated" datetime="2022-11-27T05:11:17.470Z" title="更新于 2022-11-27 05:11:17">2022-11-27</time></span><span class="post-meta-categories"><span class="post-meta-separator">|</span><svg class="icon" aria-hidden="true"><use xlink:href="#icon-fenlei1"></use></svg><a class="post-meta-categories" href="/categories/Oracle-Cloud/">Oracle Cloud</a></span></div><div class="meta-secondline"><span class="post-meta-separator"></span><span class="post-meta-wordcount"><i class="far fa-file-word fa-fw post-meta-icon"></i><span class="post-meta-label">字数总计:</span><span class="word-count">495</span><span class="post-meta-separator">|</span><i class="far fa-clock fa-fw post-meta-icon"></i><span class="post-meta-label">阅读时长:</span><span>2分钟</span></span><span class="post-meta-separator">|</span><span class="post-meta-pv-cv" id="" data-flag-title="Oracle Cloud必要操作"><i class="far fa-eye fa-fw post-meta-icon"></i><span class="post-meta-label">阅读量:</span><span id="busuanzi_value_page_pv"></span></span></div><div class="line"> <svg class="icon" aria-hidden="true"><use xlink:href="#icon-xigua2"></use></svg><svg class="icon" aria-hidden="true"><use xlink:href="#icon-xigua2"></use></svg><svg class="icon" aria-hidden="true"><use xlink:href="#icon-xigua2"></use></svg><svg class="icon" aria-hidden="true"><use xlink:href="#icon-xigua2"></use></svg><svg class="icon" aria-hidden="true"><use xlink:href="#icon-xigua2"></use></svg></div></div></div><article class="post-content" id="article-container"><p>入ROOT模式：</p>
<figure class="highlight plain"><table><tr><td class="code"><pre><span class="line">sudo -i</span><br></pre></td></tr></table></figure>
<h3 id="1-安装相关依赖"><a href="#1-安装相关依赖" class="headerlink" title="1.安装相关依赖"></a>1.安装相关依赖</h3><h4 id="centos系统下"><a href="#centos系统下" class="headerlink" title="centos系统下"></a>centos系统下</h4><figure class="highlight plain"><table><tr><td class="code"><pre><span class="line">yum -y install wget</span><br><span class="line">yum update -y && yum install curl -y</span><br></pre></td></tr></table></figure>
<h4 id="ubuntu系统下"><a href="#ubuntu系统下" class="headerlink" title="ubuntu系统下"></a>ubuntu系统下</h4><figure class="highlight plain"><table><tr><td class="code"><pre><span class="line">apt-get install wget</span><br><span class="line">apt-get update -y && apt-get install curl -y</span><br></pre></td></tr></table></figure>
<h3 id="2-删除、关闭、打开各自系统的无用附件、防火墙、端口及规则"><a href="#2-删除、关闭、打开各自系统的无用附件、防火墙、端口及规则" class="headerlink" title="2.删除、关闭、打开各自系统的无用附件、防火墙、端口及规则"></a>2.删除、关闭、打开各自系统的无用附件、防火墙、端口及规则</h3><p>注意Centos系统下：<br>删除多余附件</p>
<figure class="highlight plain"><table><tr><td class="code"><pre><span class="line">systemctl stop oracle-cloud-agent</span><br><span class="line">systemctl disable oracle-cloud-agent</span><br><span class="line">systemctl stop oracle-cloud-agent-updater</span><br><span class="line">systemctl disable oracle-cloud-agent-updater</span><br></pre></td></tr></table></figure>
<p>停止firewall</p>
<figure class="highlight plain"><table><tr><td class="code"><pre><span class="line">systemctl stop firewalld.service</span><br></pre></td></tr></table></figure>
<p>禁止firewall开机启动</p>
<figure class="highlight plain"><table><tr><td class="code"><pre><span class="line">systemctl disable firewalld.service</span><br></pre></td></tr></table></figure>
<p>注意Ubuntu系统下：<br>开放所有端口</p>
<figure class="highlight plain"><table><tr><td class="code"><pre><span class="line">iptables -P INPUT ACCEPT</span><br><span class="line">iptables -P FORWARD ACCEPT</span><br><span class="line">iptables -P OUTPUT ACCEPT</span><br><span class="line">iptables -F</span><br></pre></td></tr></table></figure>
<p>Ubuntu镜像默认设置了Iptable规则，关闭它</p>
<figure class="highlight plain"><table><tr><td class="code"><pre><span class="line">apt-get purge netfilter-persistent</span><br><span class="line">reboot</span><br></pre></td></tr></table></figure>
<p>或者强制删除</p>
<figure class="highlight plain"><table><tr><td class="code"><pre><span class="line">rm -rf /etc/iptables && reboot</span><br></pre></td></tr></table></figure>
<p>3.启用自带BBR加速<br>ubuntu：</p>
<figure class="highlight plain"><table><tr><td class="code"><pre><span class="line">sudo bash -c 'echo "net.core.default_qdisc=fq" >> /etc/sysctl.conf'</span><br><span class="line">sudo bash -c 'echo "net.ipv4.tcp_congestion_control=bbr" >> /etc/sysctl.conf'</span><br><span class="line">sysctl -p</span><br></pre></td></tr></table></figure>
<p>查看bbr是否开启成功</p>
<figure class="highlight plain"><table><tr><td class="code"><pre><span class="line">lsmod | grep bbr</span><br></pre></td></tr></table></figure>
<p>centnos8：</p>
<figure class="highlight plain"><table><tr><td class="code"><pre><span class="line">echo "net.core.default_qdisc=fq" >> /etc/sysctl.conf</span><br><span class="line">echo "net.ipv4.tcp_congestion_control=bbr" >> /etc/sysctl.conf</span><br><span class="line">sysctl -p</span><br></pre></td></tr></table></figure>
<p>查看bbr是否开启成功</p>
<figure class="highlight plain"><table><tr><td class="code"><pre><span class="line">sysctl -n net.ipv4.tcp_congestion_control</span><br><span class="line">lsmod | grep bbr</span><br></pre></td></tr></table></figure>
<h2 id="更新系统"><a href="#更新系统" class="headerlink" title="更新系统"></a>更新系统</h2><figure class="highlight shell"><table><tr><td class="code"><pre><span class="line"><span class="meta">#</span><span class="bash">Ubuntu系统</span></span><br><span class="line">apt update && apt upgrade -y </span><br><span class="line"><span class="meta">#</span><span class="bash">Centos系统</span></span><br><span class="line">yum update -y && yum upgrade -y</span><br></pre></td></tr></table></figure>
<h2 id="改为root密码登陆"><a href="#改为root密码登陆" class="headerlink" title="改为root密码登陆"></a>改为root密码登陆</h2><figure class="highlight shell"><table><tr><td class="code"><pre><span class="line">BASH</span><br><span class="line">echo root:密码 |chpasswd root</span><br><span class="line">sed -i 's/^#\?PermitRootLogin.*/PermitRootLogin yes/g' /etc/ssh/sshd_config;</span><br><span class="line">sed -i 's/^#\?PasswordAuthentication.*/PasswordAuthentication yes/g' /etc/ssh/sshd_config;</span><br><span class="line">systemctl restart sshd</span><br></pre></td></tr></table></figure>
<h2 id="开启BBR"><a href="#开启BBR" class="headerlink" title="开启BBR"></a>开启BBR</h2><figure class="highlight shell"><table><tr><td class="code"><pre><span class="line">BASH</span><br><span class="line"><span class="meta">#</span><span class="bash">修改系统变量</span></span><br><span class="line">echo "net.core.default_qdisc=fq" >> /etc/sysctl.conf</span><br><span class="line">echo "net.ipv4.tcp_congestion_control=bbr" >> /etc/sysctl.conf</span><br><span class="line"></span><br><span class="line"><span class="meta">#</span><span class="bash">保存生效</span></span><br><span class="line">sysctl -p</span><br><span class="line"></span><br><span class="line"><span class="meta">#</span><span class="bash">查看内核是否已开启BBR</span></span><br><span class="line">lsmod | grep bbr</span><br><span class="line"></span><br><span class="line"><span class="meta">#</span><span class="bash">显示如下，即成功</span></span><br><span class="line">tcp_bbr 20480 2</span><br></pre></td></tr></table></figure>
<h2 id="放行全部端口（重启失效）"><a href="#放行全部端口（重启失效）" class="headerlink" title="放行全部端口（重启失效）"></a>放行全部端口（重启失效）</h2><figure class="highlight shell"><table><tr><td class="code"><pre><span class="line">BASH</span><br><span class="line">iptables -P INPUT ACCEPT</span><br><span class="line">iptables -P FORWARD ACCEPT</span><br><span class="line">iptables -P OUTPUT ACCEPT</span><br><span class="line">iptables -F</span><br><span class="line">iptables-save</span><br></pre></td></tr></table></figure>
<h2 id="持续化规则（重启不失效）"><a href="#持续化规则（重启不失效）" class="headerlink" title="持续化规则（重启不失效）"></a>持续化规则（重启不失效）</h2><figure class="highlight shell"><table><tr><td class="code"><pre><span class="line">BASH</span><br><span class="line"><span class="meta">#</span><span class="bash">安装iptables-persistent</span></span><br><span class="line">apt install iptables-persistent</span><br><span class="line"></span><br><span class="line"><span class="meta">#</span><span class="bash">永久保存规则</span></span><br><span class="line">netfilter-persistent save</span><br><span class="line">netfilter-persistent reload</span><br></pre></td></tr></table></figure>
<ul>
<li>对于关闭防火墙更暴力点的方法，可以选择如下两种</li>
</ul>
<figure class="highlight shell"><table><tr><td class="code"><pre><span class="line">BASH</span><br><span class="line">rm -rf /etc/iptables && reboot</span><br><span class="line"></span><br><span class="line">或</span><br><span class="line"></span><br><span class="line">rm -rf /etc/iptables/rules.v4</span><br><span class="line">rm -rf /etc/iptables/rules.v6</span><br><span class="line">reboot</span><br></pre></td></tr></table></figure></article><div class="post-copyright"><div class="post-copyright__title"><span class="post-copyright-info"><h>Oracle Cloud必要操作</h></span></div><div class="post-copyright__type"><span class="post-copyright-info"><a href="https://szsyzx.github.io/7023.html">https://szsyzx.github.io/7023.html</a></span></div><div class="post-copyright-m"><div class="post-copyright-m-info"><div class="post-copyright-a"><h>作者</h><div class="post-copyright-cc-info"><h>𝓨𝓾𝔂𝓪𝓷</h></div></div><div class="post-copyright-c"><h>发布于</h><div 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