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Linux下开启SSH并且允许root用户远程登录,允许无密码登录
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<time title="创建时间2019-12-01 13:34:18" itemprop="dateCreated datePublished" datetime="2019-12-01T13:34:18+08:00">2019-12-01</time>
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<h3 id="允许root用户远程登录"><a href="#允许root用户远程登录" class="headerlink" title="允许root用户远程登录"></a>允许root用户远程登录</h3><p>修改ssh服务配置文件</p>
<pre><code>sudo vi /etc/ssh/sshd_config</code></pre><p>调整PermitRootLogin参数值为yes</p>
<a id="more"></a>
<h3 id="允许无密码登录"><a href="#允许无密码登录" class="headerlink" title="允许无密码登录"></a>允许无密码登录</h3><p>同上修改ssh服务配置文件两种情况</p>
<pre><code>1 将PermitEmptyPasswords yes前面的#号去掉
2 将PermitEmptyPasswords 参数值修改为yes如下图</code></pre><p>无论哪种最后PermitEmptyPasswords参数值为yes</p>
<p>以上两种配置均需要重启ssh服务</p>
<pre><code>service sshd restart # 或者
/etc/initd.d/sshd restart</code></pre><h3 id="扩展:"><a href="#扩展:" class="headerlink" title="扩展:"></a>扩展:</h3><p>为了安全起见FreeBSD默认情况下是不允许root用户进行SSH远程登录的需要进行以下操作才可以进行Root用户的ssh远程登录。</p>
<p>首先vi编辑/etc/inetd.conf,去掉ssh前的#注释,保存后:wq退出 (开启监听ssh服务)</p>
<p>编辑/etc/rc.conf 最后加入:sshd_enable=”yes”即可<br>激活sshd服务</p>
<pre><code>#/etc/rc.d/sshd start</code></pre><p>检查服务是否启动在22端口应该有监听。</p>
<pre><code># check port number 22
#netstat -an # 或
#netstat -tnlp</code></pre><p>最后编辑ssh配置文件</p>
<pre><code>#vi /etc/ssh/sshd_config</code></pre><p>在/etc/ssh/sshd_config最后中加入</p>
<pre><code>PermitRootLogin yes #允许root登录
PermitEmptyPasswords no #不允许空密码登录
PasswordAuthentication yes # 设置是否使用口令验证。</code></pre><p>修改完配置文件后重新启动sshd服务器(/etc/rc.d/sshd restart)即可。</p>
<p>补充:</p>
<ol>
<li>如果重启后还是不行, 请重新载入sshd_config 文件/etc/rc.d/sshd reload</li>
<li>如果出现using keyboard-interactive authentication<br>password:<br>请确认配置文件中PasswordAuthentication参数值是否已经改成yes<br>另外如果客户端是putty 那么请确认”尝试智能键盘认证SSH-2”的勾是否有去掉!!!!</li>
<li>如果是使用root帐号登陆<br>请确认密码是否为空<br>空密码无法登陆</li>
<li>请确认是否有安装SSH<br>确认sysinstall&gt;&gt;&gt;configure&gt;&gt;&gt;networking&gt;&gt;&gt;sshd是否的勾是否有打上.</li>
</ol>
<ol start="5">
<li>Please login as the user “ingressjinyu” rather than the user “root”.<blockquote>
<p>nano /root/.ssh/authorized_keys</p>
</blockquote>
</li>
</ol>
<pre><code>no-port-forwarding,no-agent-forwarding,no-X11-forwarding,command=&quot;
echo &apos;Please login as the user &quot;ubuntu&quot; rather than the user &quot;root&quot;.&apos;;
echo;sleep 10&quot; ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCPqJ2U4gidqek
4FPQJABENkrUiLVP61LObdFAZXvs2EpCf/nBQCRg4ykMNg+8TC9lb7jC65zfIrTUcNcwongDb4
3k6miSKu1M8fdqXDpcb8CdDRaKpM2wP8l+hTaJ2aWycXmGJ7lZKQPiwNUOhbrOLNEtDmOI9eiV
lz7See98LVLW+6AwfzNA8Cu4riDTvEMQr/WQ9NLrS3BZE1TAAswJi9lGDfTgEvfh4Ji+eI/xT
Xrjkkwjerkjk3jrkwejrkjwe9wASXob4rbV12TXjQIcMKaRGQAGrwOHu0nM2ibfTdgqjrTAG
03CXKzQhF09LdxKlT7GpYe0oVU2R1kjkejwQp howtoing.com</code></pre><p>删除ssh-rsa 前面的no-port….</p>
<p>参考:<a href="http://blog.csdn.net/jia0511/article/details/8237698" target="_blank" rel="noopener">http://blog.csdn.net/jia0511/article/details/8237698</a></p>
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<div class="post-toc motion-element"><ol class="nav"><li class="nav-item nav-level-3"><a class="nav-link" href="#允许root用户远程登录"><span class="nav-number">1.</span> <span class="nav-text">允许root用户远程登录</span></a></li><li class="nav-item nav-level-3"><a class="nav-link" href="#允许无密码登录"><span class="nav-number">2.</span> <span class="nav-text">允许无密码登录</span></a></li><li class="nav-item nav-level-3"><a class="nav-link" href="#扩展:"><span class="nav-number">3.</span> <span class="nav-text">扩展:</span></a></li></ol></div>
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