Linux symbolic links
A symbolic link is a link which points to another file. In Microsoft windows, this is referred to as a shortcut and in Macintosh, an alias. To create a symbolic…
Quick Introduction to Hive
Hive is an SQL language that processes and analyzes data in Hadoop. It does not require knowledge of any programming language. Hive is not suitable for OLTP, it is designed…
apache2: Could not reliably determine the server’s fully qualified domain name, using 127.0.0.1 for ServerName
Problemapache2: Could not reliably determine the server’s fully qualified domain name, using 127.0.1.1 for ServerName SolutionThis is not an error, only a warning. To fix this in Ubuntu 14.04 LTS…
PHP: How to convert XML to JSON
Converting XML to JSON is very easy in PHP. See the following code. line 1: open an empty file to write JSON line 2: load xml file line 3: convert…
Introduction to WordPress
WordPress is a free and open-source web publishing application. WordPress can be used to publish content on the Web. It allows you to create different types of content such as…
Java: How to pass command line arguments
Following simple code shows how to pass command line arguments to to Java program: Running the program Output of this program Explanation All command line arguments are passed to a…
bash: How to escape single quotes single quotes
In bash, you can use the backslash character (“\”) to escape any character. However, if a single quote is inside single quotes, it cannot be escaped with a backslash character.…
How to setup virtual lamp stack on Microsoft Windows
Oracle’s VirtualBox is a very solid and stable virtual machine but it isn’t the simplest to work with. So I abandoned it a week after I started working with. Recently,…
ksh: History and re-running commands
To view a listing of commands you entered in ksh, type To re-run the last command To re-run command by its number To re-run command by the starting text of…
PHP: How to create csv files
It is very easy to create a csv file using PHP. All you need to do is create a two dimensional array of data and call fputcsv() function. This script…