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.
To compile C programs, there are basically two ways. First using cc file.c and other is gcc file.c. In this post, you can learn those two methods.
If you are using Linux alongside Windows, then in some cases you need to Mount Windows File in Linux, there are basically Three ways to mount your windows partition.
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.