Tutorials Index Page 7
Javascript http request: No 'Access-Control-Allow-Origin' header is present on the requested resource error
When you try to fetch data from a different domain using javascript you will get the error: No 'Access-Control-Allow-Origin' header is present on the requested resource. This is a security feature of web browsers. The proper solution is to use CORS, check here for full solution. Alterntive you can code a custom proxy or use JSONP.
How to check internet speed on a Linux server from the terminal using cli?
We explain how to use speedtest python project to check internet speed via the terminal. We will also explain how to save historical network speed on your linux server with a very cron line. Finally we explain how to plot the generated csv data.
Steps to disable root login in phpMyAdmin
To disable root login in phpMyAdmin set AllowRoot to false like this example: $cfg['Servers'][$i]['AllowRoot'] = FALSE;. If you want more details check our tutorial.
How to Generate md5 checksum for all Files in a Directory
In this small tutorial we are going to explain how to calculate the md5 sum of all the files in a directory. Example find . -exec md5sum "{}" ; > md5sum_current_directory will save the md5 sums in the file called md5sum_current_directory. Check this article for more details
Introduction to MapReduce with MongoDB
MapReduce is a programming model and an associated implementation for processing and generating large data sets. In this tutorial we are going to explain how to use MapReduce with MongoDB and python. We explain how to use the MapReduce query and then with an example we show examples using pymongo en mongoengine.
Linux Coding style for coding in C
In this tutorial we are going to explain some C code style and why developers have to follow good practices. This is a very good beginner article.
Bash: How to Check if a directory exists?
If you need to check if directory exists use: if [ -d "$DIR" ];. Check here for details when you have symbolic links.
How to change MySQL root Password
In this tutorial we explain how to reset the password of root user in MySQL. We explain how to change it using mysqladmin and using queries. We also explain how to change root password when you forgot the previous password using mysql_safe command with --skip-grant-tables
How to install source code from tarball files on linux?
Usually you should use your package manager to install software in Linux, but sometimes you need to install software from source code. The most common steps are to execute: ./configure;make;make install. Check here for full details
Converting String to Int in Java?
With Java, you can use the Integer.parseInt(). Here we will show you how to use parseInt to convert a String into an integer using Java. You can also use valueOf. Remember that when the string is not a valid integer it will be thrown NumberFormatException. check here for more details.
