Getting started with CentOS Linux
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Getting Started with Red Hat Linux
Red Hat Linux is an open source server operating system. Although open source Red Hat is a commercial Linux distribution. So, most of the Linux administrators use CentOS because CentOS is a free and open source, enterprise-class and community-supported server platform as well as it is functionally compatible with Red Hat Enterprise Linux. In my previous article, I showed how to install CentOS 7 core packages in your server machine. Today I will introduce you with Red Hat Linux’s command prompt as well as 11 important commands that are always used for Linux administration. If you are new in this article as well as Red Hat Linux operating system, install CentOS 7 according to my previous article and then continue the rest of this article. Introduction with Red Hat Linux Command Prompt If you do not install CentOS yet, please complete CentOS 7 core (minimal packages) installation according to my previous article. I always suggest you to install CentOS core installation because Red Hat Linux is mainly used for server platform. So, if you use CentOS Desktop, your server will be bulky as well as server overhead will increase. It may impact of your server performance. On the other hand, [...]
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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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MikroTik VRRP Configuration with DHCP Server | October 22, 2018
MikroTik VRRP (Virtual Router Redundancy Protocol) ensures high available internet network. If any organization requires uninterrupted internet connection, MikroTik VRRP implementation will be a vital solution for them. MikroTik VRRP creates a virtual router accumulating two or more physical routers and ensures uninterrupted internet connection keeping activate one physical router always. That means, if any physical router fails to operate due to any hardware failure, MikroTik VRRP uses another backup router for internet gateway until the running router comes back [...]
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MikroTik PPPoE Server with Radius User Authentication | December 17, 2017
MikroTik PPPoE Server is popularly used in ISP Companies. Almost all Local ISP Companies use PPPoE service to manage their client’s connection. So, PPPoE Server Configuration places an important role in MikroTik RouterOS. MikroTik PPPoE Server configuration with local user database has been discussed in my previous article that is enough to manage PPPoE users for a single RouterOS. But if you have more than one RouterOS in your network or you need to manage your users remotely and more [...]
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MikroTik RADIUS Server (User Manager) Installation | October 28, 2017
RADIUS Server is a centralized user authentication, authorization and accounting application. RADIUS authentication gives the ISP or network administrator ability to manage PPP users, login users and Hotspot users from one server throughout a large network. MikroTik RouterOS has a RADIUS client that is able to authenticate login users, Hotspot users and PPP users through a RADIUS server. MikroTik team also developed a totally separate RADIUS server package named User Manager that can be used to authenticate MikroTik users smoothly. [...]
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Securing MikroTik Router with Port Knocking | March 21, 2021
MikroTik Port Knocking strategy helps to protect MikroTik Router from hackers and unauthorized access as well as enhances MikroTik RouterOS security.
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MikroTik User Manager RADIUS Installation on RouterOS 7 | July 5, 2022
The User Manager is a MikroTik provided RADIUS Server packages. It can be used to manage users for small or medium level business. User Manger is not a default RouterOS packages. So, we have to install user manager as an extra package in RouterOS 7. RouterOS 7 has brought a massive change on User Manager package. The most important change is managing User Manager from Winbox while in RouterOS 6 the User Manager package can only be managed from Web [...]
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MikroTik Hotspot HTTPS Redirect with Free SSL Certificate | June 21, 2020
SSL Certificate is required to enable HTTPS Login and HTTPS Redirect in MikroTik Hotspot. In one of my last articles I discussed how to configure MikroTik Hotspot HTTPS redirect and HTTPS login with MikroTik self-signed certificate. But self-signed certificate is not trusted by operating system. So, we get the following two issues if we configure HTTPS Login and HTTPS Redirect with self-signed certificate. Ask to proceed unsafe site: As browsers cannot trust self-signed certificate, it shows a warning message and [...]
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MikroTik Site to Site EoIP Tunnel with IPsec | March 21, 2018
VPN (Virtual Private Network) is a technology that provides a secure tunnel across a public network. A private network user can send and receive data to any remote private network using VPN Tunnel as if his/her network device was directly connected to that private network. MikroTik provides EoIP (Ethernet over IP) tunnel that is used to create a site to site VPN. EoIP tunneling is a MikroTik RouterOS protocol that creates an Ethernet tunnel between two MikroTik Routers on top [...]
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CentOS 7 Network Configuration Using nmtui Tool | August 27, 2018
After completing CentOS 7 fresh installation, the first task to a system administrator is to configure its network so that it can communicate to other network devices. In my previous article, I discussed how to install CentOS 7.5 GUI (GNOME Desktop) step by step. If you are a new CentOS 7 user and yet you have not installed CentOS 7.5 on your server machine, feel free to study my previous article and install CentOS 7.5 GNOME Desktop according to that [...]
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