Use of shebang #!/bin/bash in Linux shell scripts.
#! is known as shebang sequence. It marks the start of every script in linux. It tells the system what interpreter to use when executing the particular code written in...
Tag: rhel
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Linux: How to Find files modified in last few minutes or hours or days ?
Today we will see how to find the files which are modified recently on our linux system. We will see the files modified in last few minutes, hour, and days....
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How to increase ext3/ext4 disk partition in Linux, which is not on LVM ?
In this post, we will see how to increase ext filesystem partition in Linux manually when the filesystem is created directly on block device instead of LVM. Increase Partition size...
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Solved: xfs_quota: cannot set limits: Function not implemented.
Today we will look solution of an error message below. Solution Usually we use remount option with quota command to enable quota which doesn’t work and generates the error...
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RHEL 7 or CentOS 7: How to view file extent information for XFS filesystem ?
In ext2, ext3, or ext4 filesystems, we used the command filefrag. However for xfs filesystem, the filefrag command shows the offset values and the exact file extent values are not...
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How to list, stop, start, manage services in Centos or Redhat Linux 6 and 7 ?
Today we will look at an interesting topic how to manage services in CentOS/RHEL 6 and 7. We will look these step by step to understand it better. 1. List...
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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...