how to extend lvm partition in linux
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LVM Management in CentOS/Red Hat 7 Linux
LVM (Logical Volume Manager) is the recommended partition method for CentOS/Red Hat 7 Linux. Specially, if we work on Mail Server, File Server, FTP Server, Web Proxy Server or any application where disk space changes frequently, the LVM partition is mandatory in this case. In my previous article, I discussed how to install CentOS 7.5 with LVM partitioning. If you are new here or CentOS 7 is not yet installed, I will suggest you to follow my previous article and install CentOS 7 with LVM partitioning and then continue this article. In this article, I will discuss how to manage LVM partitioning in CentOS/ Red Hat 7 Linux with the command line utility. Basic Components and Architecture of LVM Before going to start LVM management with command line tool, we should have basic knowledge on the basic LVM terms and architecture. The following three terms are the basic components of the LVM partitioning. Physical Volume: The underlying physical storage unit of an LVM is a block device such as a partition of a disk or the whole disk. To use the block device for an LVM logical volume, the device must be initialized as a physical volume (PV). Volume Groups: [...]
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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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MikroTik User Manager Installation and Basic Configuration | December 15, 2019
MikroTik User Manager is a RADIUS application developed by MikroTik team and can be used without charge. User Manager is used for authentication, authorization and accounting of MikroTik RouterOS, PPPoE, Hotspot, DHCP and Wireless users. Although User Manager Package is developed by MikroTik it will not be found in RouterOS by default. So, we have to install User Manager Package manually if we wish to use this RADIUS application. User Manager can be installed on MikroTik RouterBOARD, MikroTik CHR or [...]
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How to Install VMware ESXi VMvisor on VMware Workstation | December 28, 2020
There is no doubt that VMware vSphere is the pioneer in virtualization world. Day by day IT infrastructure is converting to virtualization where VMware vSphere is providing more features than any other virtualization software. VMware ESXi is the foundation of VMware vSphere. VMware ESXi is a bare metal hypervisor. So, a physical server is required to install VMware ESXi. Physical servers are usually costly and beginners or researchers cannot always arrange such a high priced physical server to install ESXi [...]
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CentOS 8 Networking Configuration Using Cockpit Web Console | January 11, 2021
The first task after completing CentOS 8 fresh installation is to configure its networking so that it can be accessed from other network devices. In my previous article, I discussed how to install CentOS 8 Graphical User Interface (GNOME Desktop) with step by step screenshots. If you are a new CentOS 8 user and have not yet installed CentOS 8 on your server machine, feel free to follow that article and install CentOS 8 GNOME Desktop according to the article. [...]
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MikroTik Hotspot with Data Limit and Prepaid Billing System | January 19, 2018
If you are a network administrator and want to establish a network that will have data limitation package with prepaid billing system, MikroTik Hotspot Server with MikroTik User Manager Radius Server will be your best solution. Because, MikroTik User Manager is a poplar Radius application that will give facility to manage user data package as well as prepaid billing system efficiently. On the other hand, MikroTik Hotspot is a popular service that will help to connect your network user without [...]
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MikroTik RouterOS Device Mode: Home, Basic, and Advanced – and Their Impact on Hotspot Setup | November 4, 2025
MikroTik RouterOS offers flexible configuration options for everything from home routers to ISP-grade hotspots. When setting up your MikroTik device, you’ll see a Device Mode option in Quick Set — allowing you to choose between Home, Basic, or Advanced modes. These modes define how much control you have over the router’s features and directly affect your ability to create and manage a Hotspot network. In this guide, we’ll explain each mode, show you how to check and change device mode [...]
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Hardening MikroTik RouterOS by Limiting Login Services | February 6, 2021
MikroTik RouterOS is usually used as a bridge between WAN and LAN network. WAN network is always an insecure network because attackers always try to hack your RouterOS so that they can compromise it for their own benefit. As a network administrator of MikroTik RouterOS, we should always take anti hacking steps to secure our MikroTik RouterOS. There are a lot of security tasks those we should take care to secure our MikroTik RouterOS. Among these security tasks, we will [...]
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MikroTik Unequal Dual WAN Load Balancing with Failover using ECMP | September 15, 2019
MikroTik Router is capable of doing Load Balancing with Failover over multiple gateways. Policy Based Routing, ECMP, PCC and NTH Load Balancing are the popular load balancing methods in MikroTik Router. Among these methods, ECMP is so easy to configure and provides almost 100% load balancing and link redundancy solution. In my previous article, I discussed how to configure Load Balancing and Link Redundancy using ECMP over two equal bandwidth gateways. ECMP method is also capable of doing load balancing [...]
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Restrict Internet Access Based on MAC Address in MikroTik | February 4, 2017
MikroTik router has a lot of features by which a network administrator can design his network as he likes. As a network administrator, sometimes you may need to allow internet access some specific devices. If other devices try to access internet, they will be rejected by your router. For example, say, you have configured a simple network like below diagram. In this network, you have configured WAN, LAN, Gateway, DNS and NAT. Also you have created queue rules for limiting [...]
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