Apache and PHP are very popular tools used to publish and serve web pages. These web pages can be a simple website, a WordPress installation or a complex web application. In this tutorial, we will learn how to install and use Apache and PHP tools for rpm based distributions like Fedora, CentOS, RedHat. Update Current Repository and Package Information Before installing the Apache and PHP tools we need to update...
Uniform Resource Locator a.k.a. URL is a resource naming or locating format used to specify or address the resource. URL is very popular with the web where web sites and web resources are addressed or identified with URL format. URL Syntax URL has a very strict syntax which is defined in RFC 1738. It has the following syntax where some information about the resource is provided.
1 | scheme://location:port/file-on-server.htm?querystring=1 |
scheme is the...
Polipo was the best HTTP proxy when it emerged. Since then web behavior has a lot changed and HTTPS became popular. HTTPS prevents intermediates to read traffic and cache them. Polipo is not maintained currently but useful for different cases. Install For Ubuntu, Debian, Mint, Kali We can install polipo for Ubuntu, Debian, Mint, Kali with the apt-get command like below.
1 | $ sudo apt-get install polipo |
Install For Ubuntu, Debian, Mint, Kali We can also install...
Common Name or CN is generally used in SSL Certificates. CN is used to define the server name which will be used for secure SSL connection. Generally this SSL certificate used to secure connection between a HTTP/S server and client browser like Chrome, Explorer, Firefox. Common Name (CN) Common Name is used to specify the host or server identity. When a client try to connect to a remote server like...
Hypertext Transfer Protocol or HTTP 503 Service Unavaiable server error response code indicates that the server is not ready to handle the request. Also HTTPS protocol will use the same code for the same reason. In this tutorial we will examine the 503 error code causes, client and server side solutions. 503 Expressions HTTP 503 code can be expressed a little bit differently for different web servers. There are different...
Http is popular protocol used to transfer web page data like HTML, Javascript, Image etc. HTTP is used between our browser like Chrome, Firefox, Edge, Internet Explorer and server like Apache, Nginx etc. HTTPS is secure version of HTTP and recently sites transition to the HTTPS. But what is a user try to access HTTP of our web site. We can redirect HTTP web sites to the HTTPS. Below you...
Nginx web server provides a lot of different configuration about the web service. Some of the configurations are used very often. server_nameis one of them which can be miss interpreted. Single Domain Name In the old days internet was so little. There was less site and domain names than today. System administrators were prefer to assign a single domain to a single web server like Apache etc. Multiple Domain Names...
Lftp is a powerful command line tool which supports FTP, HTTP, SFTP, FISH, TORRENT protocols for file and data transfer. As we can see it supports popular data and file transfer protocols. It uses GNU TLS or OpenSSL for SSL/TLS encryption. In this tutorial we will look installing and different examples with lftp . Install lftp is provided Linux distributions from official repositories. We can install it for yum based distros...
curl is useful tool used to create HTTP, HTTPS, FTP, … and similar protocol request from command line. This provides us the ability to simulate web browser behavior or similar application logic without a GUI. In this tutorial we will look different use cases for curl POST and JSON. For more information about curl can be get from following tutorial. Linux curl Command Tutorial With Examples Simple POST Example We will start with...
Tcpdump is everyday tool used by system and network administrator. We generally look simple use cases like host, port and protocol filter for tcpdump . In this tutorial we will look how to filter host, port and protocol in tcpdump. But keep in mind that tcpdump will requires administrator or root privileges. We can use root account or sudo command in order to gain root privileges. Specify Host Name Tcpdump can resolve host...
