ZFS is a great filesystem which I use on most of my systems and it makes full-drive backups a breeze. However, sometimes I want to backup to a non-ZFS system. These are the steps I use for fast and verified backups to a file on another computer.
Setting up and maintaining a development environment is hard, especially when you need to destructively test features or libraries.
Changing a user's username on Linux requires no processes be running under that user. This makes sense, but what if we only have that user accessible through a SSh connection?
One of the most important parts of a working cluster is the interconnection and communication between nodes. While the networking side will not be covered now, a very important aspect will be: passwordless SSH.