lvm disk in centos/redhat 7
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CentOS 7.5 Installation with GUI and LVM Partition
Red Hat/CentOS Linux is a popular server operating system. Specially who work on mail server, web server, web proxy server, ftp server and file server are so familiar with the Red Hat/CentOS Linux. In my previous article, I discussed how to install CentOS 7.5 Linux step by step with the standard partition. But if you want to work on mail server, web proxy server, ftp server, file server or any other application where disk space changes frequently, the standard partitioning is not recommended in this case because the standard partitioning is not able to manage disk partition dynamically. On the other hand, LVM (Logical Volume Manager) provides opportunity to manage your partition dynamically. So, LVM partitioning is always recommended for Red Hat/CentOS Linux installation. But LVM partitioning is not as easy as the standard partitioning. You should have knowledge about the basic terms of the LVM partitioning. In this article, I will discuss about the basic terms of LVM and the basic architecture of LVM. I will also discuss how to install CentOS 7.5 Linux with LVM partitioning. LVM Components The following three terms are the basic components of the LVM partitioning. Physical Volume: The underlying physical storage unit of [...]
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Block Internet Access at a Certain Time in MikroTik RouterOS | August 1, 2024
We often find how to block or allow internet access at a certain time in our LAN network specially in WiFi network. Time based internet access is so useful for controlling Kids internet in any family or managing stuff internet accessibility in any office or other network. MikroTik RouterOS offers a feature named Kid Control to block internet access at a certain time. This feature is so useful for the parents or network engineers who want to block internet access [...]
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MikroTik Router Static DHCP Server Configuration | October 25, 2015
DHCP Server assigns IP address and other related IP information (Subnet mask, Gateway and DNS) automatically to network devices. But automatic DHCP Server has some disadvantages too. If any IP device connects to any automatic DHCP network, the device will get an IP address and related IP information automatically by the DHCP Server and the device will start to use resources of this network. In this situation, the network administrator cannot know who is being connected to the network and [...]
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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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Create System Restore Point in Windows OS | August 27, 2015
System Restore utility in windows operating system helps a windows user to take one or more snapshots of his/her windows system when windows operating system is working well. If any system crash occurs in future due to virus attack or critical system update or any unwanted program, the system can be reverted to its previous snapshot when windows OS was working well. So, System Restore utility in windows operating system is a very helpful service for windows users to protect [...]
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How to Prevent Simultaneous User Login in MikroTik Hotspot | November 10, 2020
MikroTik Hotspot is a user based internet access system. Most of the user authentication and authorization can be controlled with MikroTik Hotspot. But sometimes some users misuse user based authentication system. Misusing simultaneous login is one of them. Usually we provide one username and password for a user and we expect he/she will use this username and password from only one device at a time. But it is also possible to use same username and password in multiple devices at [...]
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Linux Text Editor | September 7, 2017
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 [...]
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FreeRADIUS MySQL Database GUI with phpMyAdmin on CentOS 7 | January 30, 2019
FreeRADIUS is a high performance RADIUS Server that accepts a large number of networking devices as RADIUS Client including MikroTik Router. MySQL is one of the best user sources for freeRADIUS server. In my previous article, I discussed how to install freeRADIUS server on CentOS 7 and how to integrate MySQL module with freeRADIUS server. I also discussed how to create user group and profile in MySQL database server and authenticate MikroTik PPPoE client with MySQL database user. I used [...]
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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 WiFi Frequency Band and Channel Width Explanation | January 10, 2020
MikroTik WiFi frequency, band and channel width tuning is an important task in any wireless network. If we fail to setup WiFi frequency and channel width parameter properly, we will notice a poor performance of wireless network. WiFi is aimed at use within unlicensed spectrum and the unlicensed spectrum that is usually used for WiFi is 2.4 GHz and 5 GHz band. 2.4 GHz and 5 GHz bands have multiple channels and these channels must be setup properly to get [...]
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