How to install npm on Ubuntu
Update your repository if you haven’t done so in a long time Install nodejs Install npm Check if npm installed correctly You shouldn’t get any error messages and the second…
How to reset MySQL root password
To reset MySQL password, you need to have root access to the machine. After logging in as root, start by shutting down MySQL: Verify that all mysql processes have been…
How to restart X server from command line
To restart X server, you only need to restart gdm. * Stopping GNOME Display Manager… * Starting GNOME Display Manager…
Installing Moodle on Linux
First of all make sure that you have Apache, MySQL (or PostgreSQL), and PHP installed and configured on your system. On Ubuntu, you would type the following to install these…
Installing phpPgAdmin on Ubuntu
phpPgAdmin is a web-based administration tool for PostgreSQL written in PHP. It is a very nifty tool with a very convenient GUI interface. If you have used phpMyAdmin for MySQL,…
Where are PHP error logs
PHP errors are by default set to go to the apache error log. On Ubuntu, the error log is located at /var/log/apache2/error.log. If you are a PHP developer, it is…
PHP Warning: strtotime(): It is not safe to rely on the system’s timezone settings
If a default timezone is not set in your php.ini, then you get the following warning: “Warning: strtotime(): It is not safe to rely on the system’s timezone settings. Please…
Nested if statement in Excel
Excel allows you to write a nested if statements. Following is a typical if statement: To write another condition inside the one returns true:
Removing characters from Excel cells
Sometimes Excel cells contain unwanted data. Removing this data can be a very tedious job. For example, I recently received a data file where the first column cells contained some…
What is Dependency Injection
Dependency Injection a big name for a very simple concept. Objects interact with other objects. A piece of data or an object that an object requires is its dependency. Objects…