How to create, list, delete alias or aliases in Redhat or Centos Linux ?
Today we will look at an interesting topic of alias or aliases in Redhat or Centos Linux. 1. List current aliases. alias and “alias -p” commands are synonym to each...
Tag: centos
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Explanation of Firewalld in Linux RHEL 7, or Centos 7 and how to work with it.
Similar to IPTables, firewalld is a user space utility program to manage Linux system firewall. Firewalld and IPtables both use the same kernel module i.e. NetFilter. As a result, only...
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NIS Server in RHEL/CentOS Linux – Installation, Configuration, Interview Questions, & Tips
1. Introduction Network Information Service or NIS were originally named as Yellow Pages or YP is a directory service protocol used for distributing system configuration data across the network. System...
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DHCP Server in Linux(RHEL or CentOS) – Installation, Configuration, Interview Questions, Tips
DHCP(Dynamic Host Configuration Protocol) 1. What is DHCP Server ? Dynamic Host Configuration Protocol (DHCP) automatically assigns network configuration information including IP addresses and other information like subnetmask, broadcast address,...
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How to do system update, patching, its rollback in RHEL or Centos ?
In this post, we will look how to perform RHEL or CentOS system update, package update, and how to rollback the changes. We will cover below scenarios: 1. Package update...
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Difference between RHEL 5, RHEL 6, and RHEL 7.
Today we will look at the between RHEL5, 6 and 7 version or you can say CentOS 5, 6 and 7 versions. I have gone through multiple sites, however not...
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How to assign hostname in Linux without a reboot ?
In this article, we will see how to assign hostname to a linux machine temporarily or permanent without a reboot. We have already seen the tip of assigning the domain...
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Linux: What is : in bash and what is its impact of use ?
Today we will look what is : in bash shell in Linux or Unix and how to use it, and what is its impact if used. What is : (colon)...
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What is cpio archive and how to extract and create cpio ?
It is a common question what do you mean by cpio archive and what is its use when we have gzip/xz, etc compressions already in place. And how to create...