Posted inComputer Security How tos Linux
ngrep – insecure connections your browser is making
Ngrep is a very user friendly packet sniffer, basically the "grep" equivalent at the network layer. Here is…
Posted inComputer Security How tos Linux
Block all users from logging in to a system except for root
In some cases, you might want to block all users from logging in to the system or just…
How to stop showing login messages
During user login, a Linux box might show message of the day(motd), new email, or package updates information.…
httpie – to curl or not to curl
How to interact with web services. Curl is the defacto CLI tool for interacting with web services and…
Posted inContainers Linux
Docker – quick introduction. Part 1
In these series of Docker tutorials, i will walk you through a hands on experimentation with Docker. The…
Posted inLinux Miscellaneous
Splunk free edition indexing size limit
Splunk offers a free version with a 500 MB per day indexing limit, which means you can only…
GNU date command – practical use cases
The date command in Linux boxes is one of the most powerful open source utilities. It is not…
Posted inLinux Miscellaneous
How many processors or cpu cores does my system have?
How do you find out the number of CPU cores available in your Linux system? Here are a…
When Bash shell fails to read the right environmental variables
The Shell has environment variables which determine its behavior. Exported environment variables are also popular ways of making…
Posted inComputer Security Linux Miscellaneous
Ansible vault – how to encrypt sensitive data and decrypt it during playbook runs
Sooner or later, you will find yourself adding sensitive data into Ansible playbooks, host or group vars files.Such…