You have to learn the basic commands of Linux first. Then only you can be a pro in Linux. Don’t Worry, they are easy to read and use.(pdf available)
There are many lagging issues regarding mouse and screen in Ubuntu 17.10. In this post you will find 3 ways to solve the problem.
figlet and toilet can make a text more colourful and stylish. Give it a try.
The disk names in Linux are alphabetical. /dev/sda is the first hard drive (the primary master), /dev/sdb is the second etc. The numbers refer to partitions, so /dev/sda1 is the first partition of the first drive.
Grub Rescue is a very normal problem when you delete some partition from Ubuntu. On the very Next booting, a grub rescue has appeared. If you don’t know how to deal with it, RELAX, KEEP PATIENCE, here is the answer how to fix grub rescue.
Linux is a kernel and GNU Linux is the OS and it has hundreds of flavors. GNU/Linux, inspired by UNIX, has become the most widely adopted server operating systems out there.