Logical Volume Management (LVM) creates a layer of abstraction over physical storage, allowing you to create logical storage volumes. With LVM in place, you are not bothered with physical disk sizes because the hardware storage is hidden from the software [...]
Sandeep Singh
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How to Setup a Centralized Syslog Server in Red Hat Linux
Server logs become essential troubleshooting key points for system administrators when an issue occurs. By default, all the logs on RHEL based servers are stored in /var/log directory. The syslog daemon can be configured to send logs to a remote [...]
How to Use YUM Command in Linux
Yum (Yellowdog Updater Modified) is a utility provided in RHEL based systems to install, remove and search packages. It can do a lot more than just installing and removing and that's what I will demonstrate in this tutorial. Yum installs [...]
How to Use Linux Screen Command for Remote SSH
When you are using ssh command, it provides you only one screen (terminal). If you lose that screen, you lose all you were doing on the remote computer. Sometimes it happens when a network glitch breaks the ssh connection and [...]
How to Encrypt Filesystem using LUKS in Linux
The Linux Unified Key Setup (LUKS) is a disk encryption specification that can help protect the data on devices it is configured on. Major companies have now started adopting it on workstations/laptops given to employees so that the confidential data [...]
Create And Enable Swap Partition in Linux
Swap space in a useful memory that allows your server to continue offer it's services even if the server is completely out of main memory (RAM). Linux OS should have swap space even if it is never going to use [...]
How to List Installed RPM Packages on Linux
The rpm commands are used rpm based distros like CentOS, Fedora, Opensuse and RHEL. Modern Linux distros use yum and DNF package manager which has more features. This tutorial explains the options that can be added to the rpm command [...]
How to Backup MySQL Database using Bash Script
Regular backup of mysql databases is also as important as backing up your code. So I wrote this script to backup all of my databases on the local disk. I then added gzip to compress the sql file to save [...]
How to Pass Command Line Arguments in Shell Script
In a shell script, you can pass variables as arguments by entering arguments after the script name, for example ./script.sh arg1 arg2. The shell automatically assigns each argument name to a variable. Arguments are set of characters between spaces added [...]