SSL certificate expiration date for a site or domain
When will the SSL certificate for a site expire or in how many days will an SSL certificate…
Posted inContainers How tos Linux
Docker – quick introduction. Part 2
In part 1 of this series, we saw how to pull Docker images from Docker Hub and launch…
man page for crontab schedule format
The scheduling format for the Linux scheduling daemon cron are not easy to remember, especially if you don't…
chown symbolic link
One of the most commonly used Linux system administration tools is chown, which is part of the coreutils…
Record ssh session using screen
How to record your ssh session using screen. Per the man page - "Screen is a full-screen window…
shuffle files in a directory with python
Randomly ordering files in a directory with python I have a playlist file which contains audio files to…
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…