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translated shellinabox--A Web based AJAX
translated shellinabox--A Web based AJAX Terminal Emulator
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translating by xiaoyu33
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shellinabox – A Web based AJAX Terminal Emulator
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================================================================================
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### About shellinabox ###
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Greetings Unixmen readers!
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We, usually, access any remote servers using well known communication tools like OpenSSH, and Putty etc. But, one important thing is we can’t access the remote systems using those tools behind a Firewall or the firewalls that allow only HTTPS traffic. No worries! We, still, have some options to access your remote systems even if you’re behind a firewall. And also, you don’t need to install any communications tools like OpenSSH or Putty. All you need is only a modern JavaScript and CSS enabled browser. And you don’t need to install any plugins or third party softwares either.
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Meet **Shell In A Box**, pronounced as **shellinabox**, a free, open source, web based AJAX Terminal emulator developed by **Markus Gutschke**. It uses AJAX technology to provide the look and feel of a native shell via a web browser. The **shellinaboxd** daemon implements a webserver that listens on the specified port. The web server publishes one or more services that will be displayed in a VT100 emulator implemented as an AJAX web application. By default, the port is 4200. You can change the default port to any random port number of your choice. After installing shellinabox on all your remote servers that you want to access them from your local system, open up the web browser and navigate to: **http://IP-Address:4200/**. Enter your user name and password and start using your remote system’s shell. Seems interesting, isn’t it? Indeed!
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**Disclaimer**:
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Shellinabox is not a ssh client or any sort of security software. It is just a application that emulates a remote system’s shell via a web browser. Also, It has nothing to do with SSH in anyway. It’s not a bullet proof security way to remote your systems. It is just one of the easiest methods so far. You should not run it on any public network for any reason.
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### Install shellinabox ###
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#### In Debian/Ubuntu based systems: ####
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shellinabox is available in the default repositories. So, you can install it using command:
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$ sudo apt-get install shellinabox
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#### In RHEL/CentOS systems: ####
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First, install EPEL repository using command:
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# yum install epel-release
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Then, install shellinabox using command:
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# yum install shellinabox
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Done!
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### Configure shellinabox ###
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As I mentioned before, shellinabox listens on port **4200** by default. You can change this port to any random number of your choice to make it difficult to guess by anyone.
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The shellinabox config file is located in **/etc/default/shellinabox** file by default in Debian/Ubuntu systems. In RHEL/CentOS/Fedora, the default location of config file is **/etc/sysconfig/shellinaboxd**.
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If you want to change the default port,
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In Debian/Ubuntu:
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$ sudo vi /etc/default/shellinabox
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In RHEL/CentOS/Fedora:
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# vi /etc/sysconfig/shellinaboxd
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Change your port to any random number. Since I am testing it on my local network, I use the default values.
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# Shell in a box daemon configuration
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# For details see shellinaboxd man page
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# Basic options
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USER=shellinabox
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GROUP=shellinabox
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CERTDIR=/var/lib/shellinabox
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PORT=4200
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OPTS="--disable-ssl-menu -s /:LOGIN"
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# Additional examples with custom options:
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# Fancy configuration with right-click menu choice for black-on-white:
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# OPTS="--user-css Normal:+black-on-white.css,Reverse:-white-on-black.css --disable-ssl-menu -s /:LOGIN"
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# Simple configuration for running it as an SSH console with SSL disabled:
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# OPTS="-t -s /:SSH:host.example.com"
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Restart shelinabox service.
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**In Debian/Ubuntu:**
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$ sudo systemctl restart shellinabox
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Or
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$ sudo service shellinabox restart
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In RHEL/CentOS systems run the following command to start shellinaboxd service automatically on every reboot.
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# systemctl enable shellinaboxd
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Or
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# chkconfig shellinaboxd on
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Remember to open up port **4200** or any port that you assign if you are running a firewall.
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For example, in RHEL/CentOS systems, you can allow the port as shown below.
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# firewall-cmd --permanent --add-port=4200/tcp
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----------
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# firewall-cmd --reload
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### Usage ###
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Now, go to your client systems, open up the web browser and navigate to: **https://ip-address-of-remote-servers:4200**.
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**Note**: Mention the correct port if you have changed it.
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You’ll get a warning message of certificate issue. Accept the certificate and go on.
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Enter your remote system’s username and password. Now, you’ll be able to access the remote system’s shell right from the browser itself.
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You can get some additional menu options which might be useful by right clicking on the empty space of your browser.
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From now on, you can do whatever you want to do in your remote server from the local system’s web browser.
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Once you done, type **exit** in the shell.
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To connect again to the remote system, click the **Connect** button and then type the user name and password of your remote server.
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For more details about shellinabox, type the following command in your Terminal:
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# man shellinabox
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Or
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# shellinaboxd -help
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Also, refer the [shellinabox wiki page][1] for comprehensive usage details.
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### Conclusion ###
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Like I mentioned before, web-based SSH tools are very useful if you’re running servers behind a Firewall. There are many web-based ssh tools, but Shellinabox is pretty simple and useful tool to emulate a remote system’s shell from anywhere in your network. Since, it is browser based, you can access your remote server from any device as long as you have a JavaScript and CSS enabled browser.
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That’s all for now. Have a good day!
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#### Reference link: ####
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- [shellinabox website][2]
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--------------------------------------------------------------------------------
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via: http://www.unixmen.com/shellinabox-a-web-based-ajax-terminal-emulator/
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作者：[SK][a]
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译者：[译者ID](https://github.com/译者ID)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创翻译，[Linux中国](http://linux.cn/) 荣誉推出
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[a]:http://www.unixmen.com/author/sk/
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[1]:https://code.google.com/p/shellinabox/wiki/shellinaboxd_man
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[2]:https://code.google.com/p/shellinabox/
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shellinabox–基于Web的Ajax的终端模拟器安装及使用详解
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================================================================================
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### shellinabox简介 ###
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unixmen的读者朋友们，你们好！
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通常情况下，我们访问任何远程服务器时，使用常见的通信工具如OpenSSH和Putty等。但是如果我们在防火墙外，或者防火墙只允许HTTPS流量才能通过，那么我们就不能再使用这些工具来访问远程系统了。不用担心！即使你在防火墙后面，我们依然有办法来访问你的远程系统。而且，你不需要安装任何类似于OpenSSH或Putty的通讯工具。你只需要有一个支持JavaScript和CSS的现代浏览器。并且你不用安装任何插件或第三方应用软件。
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Meet **Shell In A Box**，发音是**shellinabox**，是由**Markus Gutschke**开发的一款免费的，开源的，基于Web的Ajax的终端模拟器。它使用AJAX技术，通过Web浏览器提供的外观和感觉像一个原生壳。该**shellinaboxd**的守护进程实现了一个Web服务器，能够侦听指定的端口。Web服务器发布一个或多个服务，这些服务将在VT100模拟器实现为一个AJAX的Web应用程序显示。默认情况下，端口为4200。你可以更改默认端口到任意选择的任意端口号。在你的远程服务器安装shellinabox以后，如果你想从本地系统接入，打开Web浏览器并导航到：**http://IP-Address:4200/**。输入你的用户名和密码，然后就可以开始使用你远程系统的外壳。看起来很有趣，不是吗？确实！
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**免责声明**:
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shellinabox不是SSH客户端或任何安全软件。它仅仅是一个应用程序，能够通过Web浏览器模拟一个远程系统的壳。同时，它和SSH没有任何关系。这不是防弹的安全的方式来远程控制您的系统。这只是迄今为止最简单的方法之一。无论什么原因，你都不应该在任何公共网络上运行它。
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### 安装shellinabox ###
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#### 在Debian / Ubuntu系统上： ####
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shellinabox在默认库是可用的。所以，你可以使用命令来安装它：
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$ sudo apt-get install shellinabox
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#### 在RHEL / CentOS系统上： ####
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首先，使用命令安装EPEL仓库：
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# yum install epel-release
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然后，使用命令安装shellinabox：
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# yum install shellinabox
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完成！
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### 配置shellinabox ###
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正如我之前提到的，shellinabox侦听端口默认为**4200**。你可以将此端口更改为任意数字，以防别人猜到。
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在Debian/Ubuntu系统上shellinabox配置文件的默认位置是**/etc/default/shellinabox**。在RHEL/CentOS/Fedora上，默认位置在**/etc/sysconfig/shellinaboxd**。
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如果要更改默认端口，
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在Debian / Ubuntu：
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$ sudo vi /etc/default/shellinabox
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在RHEL / CentOS / Fedora：
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# vi /etc/sysconfig/shellinaboxd
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更改你的端口到任意数量。因为我在本地网络上测试它，所以我使用默认值。
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# Shell in a box daemon configuration
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# For details see shellinaboxd man page
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# Basic options
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USER=shellinabox
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GROUP=shellinabox
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CERTDIR=/var/lib/shellinabox
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PORT=4200
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OPTS="--disable-ssl-menu -s /:LOGIN"
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# Additional examples with custom options:
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# Fancy configuration with right-click menu choice for black-on-white:
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# OPTS="--user-css Normal:+black-on-white.css,Reverse:-white-on-black.css --disable-ssl-menu -s /:LOGIN"
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# Simple configuration for running it as an SSH console with SSL disabled:
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# OPTS="-t -s /:SSH:host.example.com"
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重启shelinabox服务。
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**在Debian/Ubuntu:**
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$ sudo systemctl restart shellinabox
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或者
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$ sudo service shellinabox restart
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在RHEL/CentOS系统，运行下面的命令能在每次重启时自动启动shellinaboxd服务
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# systemctl enable shellinaboxd
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或者
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# chkconfig shellinaboxd on
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如果你正在运行一个防火墙，记得要打开端口**4200**或任何你指定的端口。
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例如，在RHEL/CentOS系统，你可以如下图所示允许端口。
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# firewall-cmd --permanent --add-port=4200/tcp
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----------
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# firewall-cmd --reload
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### 使用 ###
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现在，去你的客户端系统，打开Web浏览器并导航到：**https://ip-address-of-remote-servers:4200**。
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**注意**：如果你改变了端口，请填写修改后的端口。
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你会得到一个证书问题的警告信息。接受该证书并继续。
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输入远程系统的用户名和密码。现在，您就能够从浏览器本身访问远程系统的外壳。
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右键点击你浏览器的空白位置。你可以得到一些有很有用的额外的菜单选项。
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从现在开始，你可以通过本地系统的Web浏览器在你的远程服务器随意操作。
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当你完成时，记得点击**退出**。
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当再次连接到远程系统时，单击**连接**按钮，然后输入远程服务器的用户名和密码。
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如果想了解shellinabox更多细节，在你的终端键入下面的命令：
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# man shellinabox
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或者
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# shellinaboxd -help
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同时，参考[shellinabox 在wiki页面的介绍][1]，来了解shellinabox的综合使用细节。
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### 结论 ###
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正如我之前提到的，如果你在服务器运行在防火墙后面，那么基于web的SSH工具是非常有用的。有许多基于web的SSH工具，但shellinabox是非常简单并且有用的工具，能从的网络上的任何地方，模拟一个远程系统的壳。因为它是基于浏览器的，所以你可以从任何设备访问您的远程服务器，只要你有一个支持JavaScript和CSS的浏览器。
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就这些啦。祝你今天有个好心情！
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#### 参考链接： ####
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- [shellinabox website][2]
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--------------------------------------------------------------------------------
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via: http://www.unixmen.com/shellinabox-a-web-based-ajax-terminal-emulator/
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作者：[SK][a]
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译者：[xiaoyu33](https://github.com/xiaoyu33)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创翻译，[Linux中国](http://linux.cn/) 荣誉推出
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[a]:http://www.unixmen.com/author/sk/
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[1]:https://code.google.com/p/shellinabox/wiki/shellinaboxd_man
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[2]:https://code.google.com/p/shellinabox/
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