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Linux Text Editor
Everything is file in Linux operating system. So, anyone who wants to work with Linux operating system (specially, Red Hat or CentOS) must learn how to edit files in Linux operating system. Because, it is always prefer to avoid graphical user interface (GUI) for changing system configuration parameters in Linux operating system unlike Windows operating system. You should be expert enough to edit any file in Red hat Linux operating system otherwise you will face a lot of difficulty to maintain your Red Hat Linux operating system. Red Hat Linux files can be edited with command line editor such vi, vim, nano etc or graphical user interface (GUI) editor such as gedit. But Red Hat Linux administrators always prefer to work with command line editor. So, this article is designed to show you how to work with Red Hat Linux command line editor (vi/vim text editor) properly. Vi / Vim Text Editor If you are familiar enough with Windows operating system, you may see notepad or WordPad which is default file editor in Windows operating system. Similarly vim, nano, emac, pico and gedit are various file editors in Red Hat Linux operating system. Among these, vi and vim are the [...]
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Ubuntu Server Set Static IP Address with Netplan | July 1, 2021
Ubuntu Server is one of the most popular open source sever operating systems. Ubuntu Server can be used in production without any hassle. In my previous article, I discussed how to install Ubuntu Server’s latest version (Ubuntu Server 20.04) with LVM. In this article, we are going to see how to assign static IP address in Ubuntu Server with Netplan network management tool. Netplan Since Ubuntu Server 17.10, Netplan is being used as the default network management tool instead of [...]
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Managing Disk Partition with the parted Tool in CentOS 7 | March 2, 2019
As a system administrator, sometimes you may require to manage partitions of your CentOS/Red Hat Linux Operating System. Partition management is always a risky task. But there are some useful tools those are so helpful to manage CentOS/Red Hat Linux disk partition easily. In my previous article, I discussed how to manage CentOS/Red Hat 7 HDD partitions with the fdisk utility. The fdisk tool is only eligible to manage MBR partition table. But GPT partition table is now becoming more [...]
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CentOS 7 Partition Management with fdisk Utility | February 11, 2019
CentOS or Red Hat Linux is a popular server operating system to the system administrators. Almost all the system admins or IT guys who play with mail server, file server, proxy server and so on are so known with CentOS or Red Hat Linux and cannot go a single day without this operating system. The guys who are also wish to be a system admin should be familiar with CentOS or Red Hat operating system. In my previous article, I [...]
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How to Block a Phone from WiFi Router | May 8, 2024
We usually buy a WiFi Router from market and configure SSID and password to access it. We also configure DHCP Server so that whenever a phone or IP device gets connected to this SSID with the password, the device can get an IP address automatically and can get internet access. It is not possible to secure the WiFi Network keeping only the password authentication method. Because the password can be shared by the users or can be hacked easily. So, [...]
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DNS Server Configuration on CentOS 7 (Caching DNS with BIND) | June 24, 2019
DNS (Domain Name System) Server is an essential part to any computer network. Today web communication cannot imagine without DNS Server. DNS is a client server protocol where DNS Client requests for the domain name resolution and DNS Server response on it. Every network should have a DNS Server because local DNS Server improves network performance by caching DNS information and serving DNS request locally. DNS Server can be configured either Windows or Linux operating system. In this article, I [...]
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MikroTik Wireless AP Configuration with DHCP using Winbox | October 22, 2019
MikroTik Wireless Router is one of the most popular and stable WiFi Routers. WiFi Zone for an ISP or for an office or for a home can easily be configured with MikroTik WiFi Router. MikroTik has a lot of WiFi Routers that can be used as a WiFi Access Point (AP), a WiFi Station or a WiFi Repeater. MikroTik Wireless Router can also be used as both WiFi Station and WiFi AP simultaneously. The simple usage of MikroTik Wireless Router [...]
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MikroTik WiFi MAC Authentication with UserMan RADIUS Server | December 23, 2019
MikroTik Wireless Router is popularly used as WiFi AP. MikroTik WiFi AP has a lot of features to tune WiFi network as your requirements. MAC authentication is one the amazing and useful features in MikroTik WiFi. MAC authentication enables filtering MAC address that means no MAC can be able to connect to WiFi AP without authentication. MAC authentication can be done either local database or RADIUS Server. MAC authentication with RADIUS Server provides facility to manage multiple APs from centralized [...]
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HTTP vs. HTTPS: The Impact Of Using SSL Certificates | November 29, 2021
Google and cybersecurity experts continue to make clarion calls to web admins and website owners to switch from HTTP to HTTPS. But is there any difference between the two other than the extra “S” at the end of HTTPS? Not everyone understands the differences between HTTP and HTTPS and why the difference is so significant. In this post, we will discuss the differences between HTTP and HTTPS, the reasons why you need to switch from HTTP to HTTPS, and the [...]
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How to Clear Google Chrome History | August 20, 2015
Google Chrome is one of the most popular web browsers to online users. It provides a lot of features which help to use this browser smoothly and securely. Google Chrome history is one of the useful features in Google Chrome which helpfully caches or remembers a lot of browsing information specially username and password or login credential of your important web account when you visit various websites in internet. If you are the only user of your desktop or laptop, [...]
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