Hey Tejasvy!!

Ubuntu is a distribution -- or distro -- of Linux. In Linux lingo, a distribution is a version of the operating system that has the Linux kernel as its foundation.
Linux is an open-source operating system which is free and can be installed in any system. It supports a better environment for developers with pre installed libraries and is friendly OS,which can be used by student or developer. Even now many IT companies and many offices, they are using linux based systems which makes their work easier.
there are different Linux based OS like :
1.Debian
2.Gentoo
3.Ubuntu
4.Linux Mint
5.Red Hat Enterprise Linux
6.Cent OS
7.Fedora
8.Kali Linux

thank you....................

all the best..................
stay home, stay safe..........!