Getting started with Ansible
What is Ansible? Ansible is an open source tool (with enterprise editions available) developed using Python and runs on Windows, Mac, and UNIX-like systems.
Automate SFTP using shell script with password in Linux/Unix
Steps to automate SFTP using shell script with password and expect with examples SFTP command example in Unix shell script with passwordless authorized_keys
Solved: Device in bay #X power delayed until VC profile is applied
Steps to overcome Device in bay #X power delayed until VC profile is applied issue on HPE Onboard Administrator and Virtual Connect
How to disable ICMP and ICMPv6 redirects in Linux
Steps to block and disable ICMP redirects for IPv4 and IPv6 in Linux using firewalld and accept_redirects. You can disable these if host is not running as a router.
Solved: Kickstart clearpart not working in RHEL CentOS 7 8
Fix kickstart clearpart not working error in RHEl/CentOS 7/8 Linux, kickstart fails to delete existing partitions using zerombr and clearpart in Linux
Easy steps to change default kernel version RHEL/CentOS 8
Step by step instructions to change default kernel from one version to another in RHEL/CentOS 8. You can change from newer to older or vice versa kernel version
How to restrict IP Address to use postfix smtp relay
How can I restrict my postfix smtp relay server to be used by only certain IP Address, How to block or allow postfix relay access using mynetworks example
How to reject mail for unknown users in postfix (local_recipient_maps)
How to reject mail for unknown users on localhost with Postfix with local_recipient_maps with example
How to cleanup Failed Actions from pcs status of cluster
Cleanup failed actions messages in pacemaker cluster. Cleanup failed resource actions and failed fencing actions in pcs status output or HA Cluster
How to disable SELinux (with and without reboot)
What is SELinux and how can i disable SElinux permanently with or without reboot. Change SELinux mode runtime using setenforce. Enable permissive mode for individual service
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
Ansible playbook tutorial | How to write a playbook with example
Ansible playbook Tutorial. What is YAML. What is Ansible Playbook. Beginners guide to write playbook with example. Sample ansible playbook to install apache
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
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
How to disable ICMP timestamp responses in Linux
Iptables rule to disable ICMP timestamp responses in Linux. Block ICMP timestamp request (13) and ICMP timestamp reply (14). Verify using hping3 or nping
How to set up proxy for yum repository in Linux?
I will share examples to set up proxy for yum repository in Linux. Modify yum.conf or /etc/yum.repos.d to set proxy for yum repositories.
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
How to install EPEL repo in RHEL 8 Linux
Steps to install EPEL repo in RHEL 8 or CentsOS 8. How to Fix "Failed to synchronize cache for repo 'epel', ignoring this repo" error in EPEL