怎样查看是否安装apache（怎样查看是否安装了摄像头）

在计算机中，Apache是一种广泛使用的开源Web服务器软件，它可以用来托管网站、应用程序和其他网络资源，而摄像头则是我们常用的一种设备，用于拍摄照片和录制视频，如何查看是否安装了Apache和摄像头呢？本文将为您详细介绍如何进行查看。

如何查看是否安装了Apache

1、通过命令行查看

在Windows系统中，我们可以使用“命令提示符”来查看是否安装了Apache，请按照以下步骤操作：

步骤1：点击“开始”按钮，然后在搜索框中输入“cmd”，按回车键打开“命令提示符”。

步骤2：在命令提示符中输入以下命令，然后按回车键执行：

httpd v

如果已经安装了Apache，那么您将看到类似于以下的输出信息：

Server version: Apache/2.4.37 (Unix)
Server built:   Jan 18 2019 19:56:58
Server's Module Magic Number: 20120211:52
Server loaded:  APR 1.5.2, APRUTIL 1.5.4
Compiled using: APR 1.5.2, APRUTIL 1.5.4
Architecture:   64bit
Server MPM:     Prefork
Threaded:     yes (fixed thread count)
Forked:        16
Server uptime:  1 day 23 hours 47 mins 58 seconds
...

这表明您已经成功安装了Apache，如果没有安装，那么您将看到一个错误消息，“'httpd' is not recognized as an internal or external command, operable program or batch file.”

在Linux系统中，您可以使用以下命令来查看是否安装了Apache：

apache2 v

或者

httpd v

同样，如果已经安装了Apache，那么您将看到类似于以下的输出信息：

Server version: Apache/2.4.37 (Unix)
Server built:   Jan 18 2019 19:56:58
Server's Module Magic Number: 20120211:52
Server loaded:  APR 1.5.2, APRUTIL 1.5.4
Compiled using: APR 1.5.2, APRUTIL 1.5.4
Architecture:   64bit
Server MPM:     Prefork
Threaded:     yes (fixed thread count)
Forked:        16
Server uptime:  1 day 23 hours 47 mins 58 seconds
...

这表明您已经成功安装了Apache，如果没有安装，那么您将看到一个错误消息，“command not found”。

2、通过浏览器访问默认页面

如果您的计算机上已经安装了Apache，那么当您访问“http://localhost”或“http://127.0.0.1”时，您应该能看到一个类似于以下的欢迎页面：

It works! This is the default web page for this server. The web server software is running but no content has been added, yet.; This page provides information about the web server that is currently serving the requested content.; Notice that the address in the top bar of your browser is different from the address displayed in this page.; That is because this page is being served by Apache on your local computer, while the address in the bar may be the address of a different web site on the Internet that happens to be using the same IP address as your computer.; If you have multiple web sites running on your computer, and they are all being served from the same IP address, then you will need to use the IP address (instead of the domain name) to access this page.; You can also use the IP address to access other websites on the Internet if it is not available through your web browser.; For example, if you are connected to a network that uses a dynamic IP address assignment scheme, then you may want to use the IP address to access this page instead of the domain name because the IP address may change each time you connect to the network.; Please contact your network administrator if this problem persists.; Additionally, a firewall may be blocking access to the web server.; If you are certain that it is running but still cannot access the page, please try again later or contact your system administrator.; For more information about how to install, configure and use this server, please see the manual pages available at <URL>; Thank you for using this software!; The web server software is running but no content has been added, yet.; This page provides information about the web server that is currently serving the requested content.; Notice that the address in the top bar of your browser is different from the address displayed in this page.; That is because this page is being served by Apache on your local computer, while the address in the bar may be the address of a different web site on the Internet that happens to be using the same IP address as your computer.; If you have multiple web sites running on your computer, and they are all being served from the same IP address, then you will need to use the IP address (instead of the domain name) to access this page.; You can also use the IP address to access other websites on the Internet if it is not available through your web browser.; For example, if you are connected to a network that uses a dynamic IP address assignment scheme, then you may want to use the IP address to access this page instead of the domain name because the IP address may change each time you connect to the network.; Please contact your network administrator if this problem persists.; Additionally, a firewall may be blocking access to the web server.; If you are certain that it is running but still cannot access the page, please try again later or contact your system administrator.; For more information about how to install, configure and use this server, please see the manual pages available at <a href="http://httpd.apache.org/docs/">http://httpd.apache.org/docs/</a>; Thank you for using this software!;`;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; `| Server version: Apache/2.4.37 (Unix) | Server built: Jan 18 2019 19:56:58 | Server's