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.
Shell, is the “Sleeping Beauty” of Linux. echo hello world and echo “hello world”, both are different. The space seems to be a special one, and the action taken by the watchdog.
The kernel, in traditional parlance, is often called the Operating System. The Shell, on the other hand, is the “Sleeping Beauty” of Linux.
Don’t Worry, accidents do happen. Ctrl+Alt+F1 to F6 are the virtual consoles.