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Rishich Mishra

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Pacemaker HA Cluster setup on Centos8/RHEL8

Pacemaker is a cluster resource manager. The High Availability Add-On cluster infrastructure provides the basic functions for a group of computers (called nodes or members) to work...

iSCSI Target and Initiator Installation on Centos8/RHEL8

What is iSCSI? iSCSI is a way of connecting storage devices over a network using TCP/IP. It can be used over a local area network...

SElinux management in Linux Centos/RHEL8

What is SELinux? Selinux is a one type of security that enhances the security that allows users and administrators more control over which users and...

Postfix mail server installation and configuration on CentOS8

Postfix configuration files The two most important files are main.cf and master.cf. These files must be owned by root. By default, these files are in /etc/postfix. You should...

Chrony configuration for NTP in centos/RHEL 8

chrony is an implementation of the Network Time Protocol (NTP). You can use chrony: To synchronize the system clock with NTP servers.To synchronize the system clock with a reference clock,...

Rich Rules of Firewalld on CentOS / RHEL8

Rich-Rules - As of now we have discussed about regular zones and services syntax that firewalld offers, Administrators have more options for playing with...

Firewall setup using Firewalld in CentOS8

Firewalld Introduction Firewall is a way to protect machines from any unwanted traffic from outside. It provides the power to users to control incoming network traffic...

Network Teaming / Configuring Link Aggregation

Network Teaming Network teaming is a method of linking one or more NICs to to a virtual interface. This is in use for failover and...

Managing IPV6 Networking in Centos/RHEL8

IPv6 overview IPV6 is in use as a replacement of ipv4 network. The major problem with IPV4 addresses is exhaustion of addresses. It resolves this...

Network Configuration and Troubleshooting

What is Network? Network is the combination of two or more computers connected together to share their resources each other by means of communication like...

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