Awk is one of the most useful commands in Unix. Awk stands for the three programmers which created the utility, Aho, Weinberger, and Kernighan. Awk gives you the ability to take STDIN and apply programming logic to it. For example:
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SSH Public/Private Keys Explained
I decided to write this post mainly because during my career, I’ve experienced many people not understanding private/public keys, the different uses, when and when not to use them.
This article is going to cover public/private key pairs to use only with SSH, but there are many uses for public/private key pair, however, they are beyond the scope of this article.
In the most simpler terms, a private/public key pair can be considered like a door lock and a key, the door lock can be compared to the public key, and the key to the provate key. Everyone can see the door lock, but only the key can open it, you need both to be able to unlock the door.
Relocate Docker Data Root Directory
Lately I had a need to move the Docker root directory to a different filesystem. After researching the item and saw that the documentation out there was limited and not very clear, I decided to write the necessary steps here.
By default, on most systems, the docker root directory is located in the directory /var/lib/docker, this directory is used to store thigs like images, volumes, and other different docker runtime items. In order to move this directory to a different location, let’s say /opt/docker-root, there are few steps required, more specifically: