Tagged: redhat

crontab examples

Scheduling important jobs with CRONTAB : Crontab Examples

Crontab is very important utility in Linux systems & is used to set up time based job scheduling.  With the help of Crontab or cron, we can execute a command or a script to...

du & df commands

Use of du & df commands (with examples)

In this article I will discuss du & df commands. Both du & df commands are important utilities of Linux system & shows disk usage of Linux filesystem. Here we will share usage of...

user & group management

User & Group management : Complete Beginner’s Guide

One of the major work of a System Administrator is User & Group Management. We have to create new users & groups, delete old ones, providing users access to a group or folder etc etc....

offline yum

Creating an Offline YUM repository for LAN

In our earlier tutorial, we discussed “How we can create our own yum repository with ISO image & by mirroring an online yum repository”. Creating your own yum repository is a good idea but...

scp & rsync commands

Files transfer using scp & rsync commands

Hello Linux-fanatics, in this tutorial we will discuss how to transfer files among system using scp & rsync with some examples. (also read tutorial on “Cloning disks using dd & cat commands“). But firstly let’s...

Network bonding

Networking Bonding in RHEL/CentOS 7: Combining multiple NICs into one

When hosting a successful & busy websites or operating a critical server, high availability & redundancy are major factors to consider. To achieve high availability & redundancy, backup of the server & server clusters...

SELinux

Beginner’s guide to SELinux

Hello Linux-fanatics, in this tutorial we will learn to use SELinux. Its been my experience that most Sys-Admins consider it a hassle & ends up disabling it. It is a great tool to help...

cloning disks

Cloning Disks using dd & cat commands for Linux systems

It always wise for a System Administrator to be prepared for the worst situation & having a backup/clones of servers, when such a day arrives will certainly make your job & life easy. Though...

bash tips tricks

Important BASH tips tricks for Beginners

Hello Linux-Fanatics, this post is dedicated to those users who are just getting started with their Linux Journey. I am sharing some Bash tips tricks which will make you more familiar with BASH &...

date & time

Playing with Date & Time in RHEL/CentOS

In this tutorial, we are going to discuss how we can view or modify date & time values in our RHEL/CentOS 7 servers. We are going to discuss 3 commands which we can use...

changing default runlevel

Changing Default Runlevel in Centos/RHEL 6 & 7

Hello Linux-Fanatics, in this post we will be process for changing default runlevel in Centos\RHEL 6 & 7 . But before we do that, we must discuss following… What is a runlevel ? Runlevel...

secure grub

How to secure Grub in Centos/RHEL 5/6/7 & 7.2

Hello Linux-fanatics, in this tutorial we will learn to secure Grub. GRUB or Grand Unified Bootloader, is the default boot-loader for most of the Linux distributions. It provides a user the choice to boot one of...

change hostname

5 ways to add or change hostname in RHEL/CentOS 7

Hostname for a system is like an identity for that system, it not only makes system management easy but we can also use hostname to access a system over LAN. In this tutorial, we...

IP aliasing

IP Aliasing : Assigning multiple IP addresses to single NIC

Hello Linux-fanatics, in this tutorial we are going to learn to assign multiple IP addresses to a single NIC (Network Interface Card) . This process of assigning multiple addresses to single network interface is...

securing apache

12 Important things to do for securing APACHE Web Server

Hello Linux-fanatics, previously we have discussed how we can install & configure apache web server & then secure it using a SSL certificate. Apache is used for web hosting for millions of websites (I...

LVM

Beginner’s Guide to LVM (Logical Volume Management)

In this tutorial, we will discuss about Logical Volume Management. LVM or Logical Volume Management is a disk management tool that makes it easier to manage disk space. With the help of LVM, we can...