In one of our article (Web Server Security (Apache or HTTPD) Part 2) we mentioned about two important modules which help us protect our web server. Here we learned that these two modules help to protect our server from brute force and DDOS…

On our previous article we discussed about the second four topics and this is the last part to discuss about how we can secure a web server.  Let’s begin with, Limit request size Usually apache server does not put any limitation on upload…

On our previous article we discussed about the first four topics of our list. On this article we will discuss about the rest of the topics. So we begin with the below topic here. Restrict access of directories using allow and deny Putting…

Securing apache web server is important to get a good reputation for the hosting service. After setting up the apache web server it is very important to get the security check and minimum necessary security configurations for both side…

Virtual host is a feature of apache web server. This feature helps to setup several domains on one single server. Also we can put several other rules according to domain names. First of all let’s try to know what are the important issues…

Web server is a very common issue we need to handle or implement for the client. Over 40 percent of market is using apache as web server for the client. We find several features which are useful for clients. It is most featured server in…

On linux operating system, file permission is a very important issue. As a server system different users need t different kind of permission. More over a user may get permission on a single file and at the same time it may also necessary to…

File system is an important issue for any operating system. We can see that every operating system gicves us the freedom of choice to get a file system which will be suitable for the particular use. On linux we can find different 93 types…

It is not necessary now a day to create a router from this kind of operating system. But a lot of time we do it for experimenting or sometimes we do this to forward packet through the operating system for some particular reasons. Here I…

Firewalld is one of the strongest tools on Linux system. This tool basically used to control network traffic and port forwarding. Just in this tool we have very rich library for various kind of works. We will start this article by starting…

On this article we will talk about a very popular service which is SSH or secure shell. As this is widely used services so this service needs to be secure more than any other services. Now a day most of the system administrator emphases on…

On this article we will discuss about bridged network interface. Why we need this kind of facilities or why we use it. First of all we need this facility for various reasons. Depends on what we will design as a service. Before launching a…

On this article we will learn how to create a virtual network interface. But we need to know why we will do this. There are several reasons we may do this on a server.  Few of them are mentioned below. To assign more than one IP to a…

Documentation can be lost without a notice. We cannot help it all the time. Even oracle databases cannot guarantee you 100% back up. So it is quite possible that after 99.99% back you password document can be lost or corrupted. So what to…

In this article we will know only about how to configure network interface using text mode. So as we know there we have to work on four files those are given below: /etc/sysconfig/network-scripts/ifcfg-(Device Name) /etc/…

Network configuration on Linux is consists of four steps. We can do it both graphically and in text mode. In this article we will learn both of these ways, so that we can do this task using both the methods. What are the files we need to…

To find out the previous topics read this. Change the grub timeout: there are few reasons we need to reduce the grub timeout. But most common reason is decreasing boot time of the operating system. It is necessary for maintenance. If we…

I have shown the installation process on my previous blog titled by “Install centos on virtualbox or vmware”. The installation process is same if you want to install Centos on a physical machine. On this article I will explain few things…

Users – this tool is used for user management. Usually it shows who are currently logged in into system. It is one of the simplest commands of Linux system. It is mostly used for finding out the current logged in user only when it is…

This is a basic Linux command list or cheat sheet for the beginners. Those who are trying to learn Linux commands this is for them. this is the part nine for the beginners. Iptables/firewalld – this is a very powerful tool on Linux. It…

W – this is a one character command with some very important features. This single command combines the work of two commands. Uptime and who both of those commands shows different results in a different format. But using this “w” command…

Basic commands for linux terminal continues from here. Date – this command is simply related to date and time management. Usually this command is used for check and set server date and time. Server date and time is important in case of…

Basic Linux Commands continues from here. Netstat – this command means network statistics. This is a very useful tool for network troubleshooting and maintaining performance. We can watch network interface and routing table using this…

Useradd – this is known as users add. Alternative command is adduser. This command is used for creating new users. it have different parameters for simple to advance level use. Using this command we can create a user without any…

find – this command is a complex command for any beginner. But it is one of the very important commands we need to learn. Because we will find this command very useful on almost every time we work on troubleshooting. It has so many…