In this tutorial, we will show you how to check disk space usage with ncdu utility on your Linux server. For those of you who didn’t know, Ncdu (NCurses Disk Usage) is a command-line tool to view and analyze disk space usage on Linux. It can drill down into directories and report space used by individual directories. This way it is very easy to track down space-consuming files/directories. ...
In this tutorial, we will show you how to hide Nginx Server Header on your Linux server. In default Nginx configuration, the server sends HTTP Header with the information of the Nginx version number of the Server. The HTTP response header “Server” displays the version number of the server. This information can be used to try to exploit any vulnerabilities in the Nginx, especially if you are ...
In this tutorial, we will show you how to install Nginx on Ubuntu. For those of you who didn’t know, Nginx is one of the most popular web servers in the world and is responsible for hosting some of the largest and highest-traffic sites on the internet. It is more resource-friendly than Apache in most cases and can be used as a web server or a reverse proxy. So today I’m going to show you how...
In this tutorial, we will show you how to install Java on Ubuntu. For those of you who didn’t know, Java is a programming language and computing platform. It was first released by Sun Microsystems in 1995. Many programs and scripts require Java to run it, but usually, Java is not installed by default on a VPS or Dedicated Server. This article assumes you have at least basic knowledge of Linux...
In this tutorial, we will show you how to fix apt-get GPG error NO_PUBKEY on Ubuntu 14. For those of you who didn’t know, The apt packaging system has a set of trusted keys that determine whether a package can be authenticated and therefore trusted to be installed on the system. Sometimes the system does not have all the keys it needs and runs into this issue. Fortunately, there is a q...
In this tutorial, we will show you various Linux and Unix Tar command examples that might be helping you. For those of you who didn’t know, The tar command is used to rip a collection of files and directories into highly compressed archive files commonly called tarball or tar, gzip and bzip in Linux. The tar is the most widely used command to create compressed archive files that can be moved e...
In this tutorial, we will show you how to install BIND9 Master and Slave DNS Server on Ubuntu. BIND is a widely used DNS Server. Ideally, a DNS server consists of 2 machines that work together simultaneously, one acts as a master and the other one act as a slave. If your domain registrar doesn't provide you with a free DNS server, or if you want to create a custom DNS record, then you might need...
In this tutorial, we will show you how to install and configure Squid 3 on Ubuntu. For those of you who didn’t know, Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Squid proxy is used by various organizations and internet providers to reduce bandwidth and increase response time. This article assumes you have at least basic knowledge of Linux, know how to use the s...
In this tutorial, we will show you how to increase the PHP memory limit on a Linux server. If you have seen an error like ”Fatal Error: PHP Allowed Memory Size Exhausted” in webserver logs or your browser, this means that PHP has exhausted the maximum memory limit. This tutorial will show two different ways how you can increase the PHP memory limit. This article assumes you have at least ba...
In this tutorial, we will show you how to reset the root password MySQL server. By default, the MySQL server will be installed with the root account and the password is blank. Have you ever forgotten the root password on one of your MySQL servers? If you have set the password for root and forget it, then you will need to reset the root password for MySQL. To reset your MySQL password just follow...