devops

How to set up GFS2 with clustering on Linux ( RHEL / CentOS 7 )

configure and setup gfs2 file system with pacemaker cluster on rhel or centos 7 linux. configure gfs2 fs resource constraint using clvmd and dlm

Deepak Prasad11 min read
linux

Solved: Boot into rescue mode without password (RHEL/CentOS)

difference between rescue mode and emergency mode in linux, rescue mode in linux linux emergency mode repair, rescue mode in linux, grub rescue mode

Deepak Prasad4 min read
linux

Step-by-Step: RHEL/CentOS 8 installation with screenshots

Step by Step Installation Guide for Red Hat Enterprise Linux 8 Beta. Install RHEL 8 Beta with screenshots. How to install RHEL 8 Beta Linux with images.

Deepak Prasad2 min read
linux

How to check and set Java timezone (update tzdata for openJDK) using tzupdater

Steps to set java timezone using tzupdater update tzdata for openjdk in CentOS RHEL SLES. Check current tzdayta version in JRE java -jar tzupdater.jar -V

Deepak Prasad7 min read
linux

How to prevent user from using old password (or re-using) again in Linux

How to prevent user from using old password or reusing old password while providing new password in CentOS/RHEL 7 Password has been already used. Choose another

Deepak Prasad2 min read
linux

How to generate sosreport in rescue mode on Software RAID (RHEL/CentOS 7)

How to generate sosreport in rescue mode linux. Fix sosreport command not found. Boot using RHEL/CentOS DVD to rescue mode in linux with software raid linux

Deepak Prasad3 min read
linux

How to Install Apr And Apr-Util in Linux

Step by Step instructions to install apr and apr-util in Linux. 2 different ways to install apr and apr-util. Install from github page on ubuntu, debian, centos, redhat, rocky linux, alma linux etc

Omer Cakmak5 min read
linux

Install Google Cloud CLI (gcloud) on Linux

Step by step instructions to install gcloud cli on Ubuntu (Debian based) and Rocky Linux (Red Hat based).

Omer Cakmak9 min read
system-administration

How to PROPERLY boot into single user mode in RHEL/CentOS 7/8

linux single user mode, centos 7 single user mode, rhel 7 single user mode, single user mode linux, how to boot into single user mode linux, centos single user mode, single user mode

Deepak Prasad4 min read
linux

Setup local YUM/DNF repo server Rocky Linux 8 [Step-by-Step]

Step by Step instructions to configure local and offline yum or dnf repository server using Nginx on Rocky Linux 8

Deepak Prasad7 min read
linux

How to Install GCC on Rocky Linux

Install GCC on Rocky Linux with the Development Tools group, verify it with gcc --version, then compile and run a first C program to confirm the toolchain.

Deepak Prasad5 min read
system-administration

Install iRedMail on Rocky Linux 8 [Step-by-Step]

Step by Step instructions to install iredmail on rocky linux 8 with screenshots. Install and Configure iredmail server GUI

Deepak Prasad7 min read
linux

Install WireGuard VPN Rocky Linux 8

Step by step instructions to install wireguard VPN on Rocky Linux. Configure network, firewall and test the VPN

Deepak Prasad8 min read
linux

Install Graylog on Rocky Linux 8

Step by step instructions to install graylog on rocky Linux 8. Install and configure elasticsearch, mariadb, java and graylog server

Deepak Prasad8 min read
linux

Install MariaDB on Rocky Linux 8.4

In this tutorial, we will learn how to install MariaDB on Rocky Linux 8.4. You may also check the mariadb page link for the official instructions to install

Deepak Prasad5 min read
linux

How to implement password policy in RHEL Linux with examples

Learn to implement password policy with complexity, old password reuse and more using pwquality.conf explained with examples in RHEL/CentOS 7 Linux

Deepak Prasad5 min read
devops

#4-ELK Stack: Configure metricbeat 7.x to monitor elasticsearch cluster

Tutorial to install and configure metricbeat to monitor elasticsearch cluster in ELK Stack on RHEL/CentOS 7/8 Linux with examples over SSL/TLS (HTTPS)

Deepak Prasad9 min read
linux

Steps to repair filesystem in rescue mode in RHEL/CentOS 7/8 Linux

Steps to repair filesystem in rescue mode in RHEL/CentOS 7/8 Linux. repair xfs filesystem with xfs_repair. repair ext4 filesystem with e2fsck

Deepak Prasad4 min read
system-administration

5 easy steps to blacklist kernel module in CentOS RHEL 7 8

Step by step guide to disable and blacklist kernel module using GRUB2 and modprobe.d in Red Hat and CentOS 7 and 8 Linux. Permanently unload kernel module

Deepak Prasad6 min read
linux

Install GNOME | How to enable GUI mode | RHEL CentOS 8

Steps to install gnome desktop environment in RHEL CentOS 8 for workstation and server with gui. Enable and start GUI mode, command to switch GUI mode linux

Deepak Prasad5 min read
storage

How to fix 'pvs shows unknown device' in RHEL/CentOS 7/8

Troubleshoot and fix LVM Error pvs couldnt find device with uuid and pvs shows unknown device Recover or Restore lost physical volume redhat linux

Deepak Prasad4 min read