You have to learn the basic Linux commands 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. This post has described the usage of Figlet, Toilet etc. You can customize your word too.
Commands in Unix when things go wrong. Terminals and keyboards has no uniform behavioral pattern. There are certain Commands to repair Linux.
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.