Ansible: yum update, reboot system, and wait_for reboot to complete
Table of Contents The Objective The purpose of this post is to explain with an example how ansible initiates the reboot and waits for the reboot to complete. In some…
How to check if a File exists in bash
There are several ways to check the availability of a file in Linux. The “test” command in bash scripting is one of the critical approaches to checking a file’s existence.…
Ansible reboot Linux machine or server with playbooks
Indeed to reboot the VM or bare metal Linux machine/server using Ansible and wait for it to come back but it does not work with the playbook as described here.…
How to display listening ports using the netstat from the command line
If you’re troubleshooting a service that you know is running normally, the next step is to ensure it’s listening on the correct network port. The netstat command shows the services…
How to use buffers to copy and paste lines in VI/VIM
The vi and vim editors allow you to copy text from your file into temporary buffers for use in other places in the file during your current vi work session.…
How do I fix the GPG error “NO_PUBKEY”?
I recently added some extra repositories with the Mysterium network and received this error when I reloaded the apt package database: To fix this, I found to execute the following…
Linux Download: Top 12 Free Linux Distributions for Desktop and Servers
All the Linux distributions are either derivatives of GNU/Linux ( OS made up of Linux Kernel developed by Linus Torvalds and GNU software repository) or derived from other Linux derivatives.…
CentOS 8 Early EOL in 2021 and CentOS Stream
CentOS 8 Early EOL in 2021 and CentOS Stream The CentOS 8 life cycle has been cut short with the news of its EOL in December 2021. RHEL revealed it…
TCP vs UDP
Here, we will compare these two protocols’ main characteristics, and we will look at TCP Protocol (Transmission Control Protocol) and UDP Protocol (User Datagram Protocol). This comparison is very important…