Linux bash shell-scripting best practise and basic commands

Linux bash shell-scripting best practise and basic commands Sharing some notes from my studies! http://www.davidpashley.com/articles/writing-robust-shell-scripts/ http://www.tecmint.com/basic-shell-programming-part-ii/ Ubuntu - https://help.ubuntu.com/community/Repositories/CommandLine dns duck duck - https://www.duckdns.org/why.jsp https://blog.malwarebytes.com/threat-analysis/2017/01/new-mac-backdoor-using-antiquated-code/ http://unix.stackexchange.com/questions/227070/why-does-a-z-match-lowercase-letters-in-bash https://www.linuxtrainingacademy.com/linux-commands-cheat-sheet/ 1 – SYSTEM INFORMATION # Display Linux system information uname -a # Display kernel release information uname -r # Show which version of redhat installed cat /etc/redhat-release # Show how… Continue reading Linux bash shell-scripting best practise and basic commands

Make it fun to learn and you will be surprised how much you will learn

Make it fun to learn and you will be surprise how much you will learn!

Challenge yourself and learn how to use the commands below! for grep sed cowsay (there is also the command cowthink) Success is no accident. It is hard work, perseverance, learning, studying, sacrifice and most of all, love of what you are doing or learning to do. Pele     My "cowsay" command for i in… Continue reading Make it fun to learn and you will be surprised how much you will learn

Cisco VIRL to study for CCNP Routing, Switch and Troubleshoot certification

VIRL Virtual Internet Routing Lab

Cisco VIRL to study for CCNP Routing, Switch and Troubleshoot certification This post is my notes for my installation.  Official installation and other options can be found here http://virl-dev-innovate.cisco.com/ Start Here - Welcome to VIRL VIRL is Cisco's easy-to-use, powerful, and extensible network modeling and simulation environment that enables users to: Build highly-accurate models of existing… Continue reading Cisco VIRL to study for CCNP Routing, Switch and Troubleshoot certification

Vim tip cheat sheet commands

Vim Cheat Sheet source https://www.linuxtrainingacademy.com/vim-cheat-sheet/ Contents Global Cursor Movements Insert Mode Editing Marking Text (Visual Mode) Visual Commands Registers Marks Macros Cut and Paste Exiting Search and Replace Search in Multiple Files Working With Multiple Files Tabs Global :help keyword – open help for keyword 😮 file – open file :saveas file – save file… Continue reading Vim tip cheat sheet commands

Cisco ASA Firewall troubleshooting show conn and the meaning of flags

Reminder of Cisco ASA Firewall troubleshooting "show conn" and the meaning of "flags", hands on work! If you are looking at the connections on the firewall, understanding the connection's flags is important to understand the status of the connections, specially if you are troubleshooting or want to confirm a connection. Cisco ASA firewall command "show… Continue reading Cisco ASA Firewall troubleshooting show conn and the meaning of flags

Hurry up! Free RedHat course RH024

Red Hat Enterprise Linux Technical Overview promotion code promo-rh024  https://www.redhat.com/rhtapps/promo-rh024 It is a basic and for beginners course with only 7 to 10 minutes pear videos, although if you already have good knowledge is still good for a"refresh" knowledge, check my notes below for example. I liked in particular the booting process explanation and the System… Continue reading Hurry up! Free RedHat course RH024