Linux Loader or Linux Boot Loader is also known as LILO, a combination of initial 2 characters of Linux LOader. LILO loads Linux operating system into main memory to boot system and to start working on it. Multiple operating systems like Windows & Mac OS comes up with their respective boot loaders.  When you install Linux OS, you need to install a special boot loader for it. We have multiple boot loaders available in the market, LILO is one of them. When the system started, BIOS performs some initial tests and transfers control to the Master Boot Record. Now, LILO loads the Linux OS and starts it. The best part of using LILO is that it allows fast boot of Linux OS.