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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    Troubleshooting Common Issues with Security Cameras in MikroTik Networks |   February 7, 2025

    30 Seconds Summary When fixing security cameras on MikroTik networks, you might see issues like bad video quality, connections dropping, motion detection not working, and security weaknesses. These problems can happen because of not enough internet speed, network congestion, IP conflicts, old software, or weak security. To fix these, make sure you have enough internet speed, set up the IP settings correctly, give camera traffic priority, and update the software regularly. Also, protect the cameras with strong passwords and encryption. [...]

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    MikroTik VLAN and Bridge Configuration |   September 19, 2017

    VLAN and Bridge are two useful features in MikroTik Router.  These two features are frequently used in any MikroTik network configuration. VLAN divides a physical interface into multiple logical interfaces. So, you can isolate your network into multiple logical networks on a physical interface. On other hand, MikroTik Bridge integrates multiple physical interfaces in a logical interface. So, you can extend your broadcast domain on multiple physical interfaces and can extend your popular services such as PPPoE or DHCP on [...]

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    MikroTik User Management (RouterOS User) |   October 22, 2017

    MikroTik User Management plays an important role in MikroTik system administration as well as MikroTik security. Don’t be confused the title User Management with the MikroTik UserManager. UserManager is an optional and totally separate package distributed by MikroTik. UserManager is an implementation of Radius server that is used to maintain not only RouterOS users but also PPPoE, PPTP, Hotspot, Wireless and DHCP users. In my few future articles, I will discuss how to maintain these users with MikroTik UserManager Radius [...]

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    OpenVPN Configuration over Port 443 on Ubuntu Linux |   June 20, 2022

    OpenVPN provides a secure and encrypted VPN tunnel across public network. Unlike PPTP and L2TP VPN Services which can be blocked, OpenVPN can highly be customized and even can be run over so popular TCP Port 443. So, OpenVPN cannot easily be blocked. OpenVPN uses SSL/TLS Certificates. So, OpenVPN Tunnel is a trusted tunnel to send and receive data across public network. OpenVPN Server can easily install on Ubuntu Server. Installing OpenVPN Server on Ubuntu Server, we can connect Windows, [...]

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    MikroTik Bandwidth Management using Simple Queue |   September 3, 2015

    MikroTik is one of the most popular routers in computer networking. It is said that no office or ISP company cannot go a single day without MikroTik Router. MikroTik Router is also a popular router to a network administrator because MikroTik Router is easily maintainable with graphical user interface software named winbox than other routers. A lot of services are available in MikroTik router to run a network smoothly. Among these services, Bandwidth Management Service is the most popular service in [...]

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    How to Block Tor Browser with MikroTik Router |   June 12, 2019

    Tor Browser is an alternative to VPN and Web Proxy that breaks blocking firewall rule. If any user installs and uses Tor Browser, he/she can hide the public IP address of router and can unblock blocked websites applied on a network. So, administrators should block Tor Nodes along with other blocking firewall rule. In my previous article, I discussed how to block VPN and Proxy access with MikroTik Router and in this article I will discuss how to block Tor [...]

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    MikroTik Load Balancing and Link Redundancy with PBR |   March 31, 2019

    In computer networking, the Load Balancing technique is used to send network traffic over multiple gateways. If you have multiple ISP connections available, you can use load balancing technique to establish a stable network. You may now ask, why will I use multiple ISP connections? What are the benefits to use multiple ISP connections in my network? For your satisfaction, the following points are some reasons to use load balancing technique in your network. No ISP can give you 100% [...]

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    MikroTik Load Balancing and Link Redundancy with ECMP |   October 28, 2016

    Load balancing and link redundancy is the main concern to any network administrator. Because, they always want to keep live their network 24/7. If you have multiple WAN connections, you can easily make a load balancing as well as link redundancy network with MikroTik Router. Different types of load balancing and link redundancy are present in MikroTik Router. ECMP Load Balancing is one of them. ECMP is so easy to implement and it provides an perfect load balancing solution. In this [...]

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