详解Ubuntu下ssh服务的安装与登陆（ssh远程登陆）
<p>ubuntu默认并没有安装ssh服务，如果通过ssh远程连接到ubuntu，需要自己手动安装ssh-server。</p>
<p>
判断是否安装ssh服务，可以通过如下命令进行：</p>
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<code class="bash functions">ps</code> <code class="bash plain">-e|</code><code class="bash functions">grep</code> <code class="bash functions">ssh</code>
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输出如下：</p>
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<code class="bash plain">zht@zht-ubuntu:~$ </code><code class="bash functions">ps</code> <code class="bash plain">-e|</code><code class="bash functions">grep</code> <code class="bash functions">ssh</code>
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<code class="bash spaces"> </code><code class="bash plain">2151 ? 00:00:00 </code><code class="bash functions">ssh</code><code class="bash plain">-agent</code>
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<code class="bash spaces"> </code><code class="bash plain">5313 ? 00:00:00 sshd</code>
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ssh-agent表示ssh-client启动，sshd表示ssh-server启动了。</p>
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如果缺少sshd，说明ssh服务没有启动或者没有安装。</p>
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安装ssh-client命令：</p>
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<code class="bash functions">sudo</code> <code class="bash plain">apt-get </code><code class="bash functions">install</code> <code class="bash plain">openssh-client</code>
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安装ssh-server命令：</p>
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<code class="bash functions">sudo</code> <code class="bash plain">apt-get </code><code class="bash functions">install</code> <code class="bash plain">openssh-server</code>
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安装完成以后，先启动服务：</p>
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<code class="bash functions">sudo</code> <code class="bash plain">/etc/init</code><code class="bash plain">.d</code><code class="bash plain">/ssh</code> <code class="bash plain">start</code>
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启动后，可以通过“ps -e|grep ssh”查看是否正确启动。</p>
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ssh服务默认的端口是22，可以更改端口，使用如下命令打开ssh配置文件：</p>
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<code class="bash functions">sudo</code> <code class="bash plain">gedit </code><code class="bash plain">/etc/ssh/sshd_config</code>
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配置文件内容如下：</p>
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<code class="plain plain"># package generated configuration file </code>
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<code class="plain plain"># see the sshd(8) manpage for details </code>
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<code class="plain plain"># what ports, ips and protocols we listen for </code>
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<code class="plain plain">port 22 </code>
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<code class="plain plain"># package generated configuration file </code>
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<code class="plain plain"># see the sshd(8) manpage for details </code>
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<code class="plain plain"># what ports, ips and protocols we listen for </code>
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修改端口号（port）后，重启ssh服务即可生效，命令如下：</p>
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<code class="bash functions">sudo</code> <code class="bash plain">/etc/init</code><code class="bash plain">.d</code><code class="bash plain">/ssh</code> <code class="bash plain">restart</code>
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ssh服务启动后，即可登陆，登陆命令格式为：ssh 帐号@ip地址</p>
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例如：</p>
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<code class="bash functions">ssh</code> <code class="bash functions">test</code><code class="bash plain">@192.168.135.249</code>
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根据提示输入test的密码，即可远程登陆。</p>
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退出远程登陆命令：exit</p>
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演示如下图所示：<img style="max-width:100%!important;height:auto!important;"title="详解Ubuntu下ssh服务的安装与登陆（ssh远程登陆）" alt="详解Ubuntu下ssh服务的安装与登陆（ssh远程登陆）" src="https://zhuji.jb51.net/uploads/img/202305/7bb15cc44419dce4334d664fc4df6ee4.jpg"></p>
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原文链接：http://blog.csdn.net/zht666/article/details/9340633</p>
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以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。</p>
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