All over the web, you might encounter some much needed files are archived using RAR, like your Linux course certification files, for example. That’s when, it’s useful to know how to extract them using the proper software.

This can happen after a fresh installation of CentOS. The /etc/resolv.conf is looking for a DNS that it can use but after a fresh installation, it usually comes empty. So, if the file has no DNS to look after, then it can not resolve hostnames. This should tell you that the current machine is using the wrong DNS server.

I came across situations where I needed tot test which Docker image would be most suitable for a particular set of needs and one of those metrics that I used was disk space. I remember the more I used to get started with Docker, the more I was curious to see which Docker images consume more or less resources.

In order to view the IP of a Docker container, you can execute the following command:

docker inspect -f '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' container-ID-or-name

1. Execute the Docker events command:

docker events &

By this point, any Docker command that you’ll run next will be viewed with more logs.