Common Network tools – ping, telnet, netstat and arp
ping (Packet Internet Gropper) The Ping command allows a user to ping another network IP address. Ping command sends ICMP ECHO_REQUEST packets to other hosts, and this command can help…
PLIPCONFIG
plipconfig – fine-tune PLIP device parameters SYNOPSIS plipconfig interfaceplipconfig interface DESCRIPTION Plipconfig is used to (hopefully) improve PLIP performance by changing the default timing parameters used by the PLIP protocol.…
Nightly Reboot – Linux Cronjob Example
DISCLAIMER I’m not a certified financial planner/advisor nor a certified financial analyst nor an economist nor a CPA nor an accountant or a lawyer. I’m not a finance professional through…
How To Generate 4096-bit Secure ssh Key with ssh-keygen
Ssh is a secure protocol used to manage remote systems like Linux, BSD, UNIX, network devices event windows operating systems. The traffic between systems is encrypted. Ssh uses asymmetric keys…
How To Set up SSH Keys on a Linux / Unix System
I recently read that SSH keys provide a secure way of logging into a Linux and Unix-based server. How do I set up SSH keys on a Linux or Unix-based…
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.…