Hello everyone i am nihal and i am new to linux.
I have completed cyber security course and have a little bit good hands on in kali linux and parrot.
but i only have knowledge of basic commands
plz help he further to learn advance linux
Welcome to the community @Nihal, and our forums! 
Welcome to the forums @Nihal what cyber security course did you complete? It may be useful to others.
A good place to start is: Cybersecurity - Linux Foundation - Education
I have completed the cyber security course from a private classes that works on CEH course syllabus
currently i am also doing google cyber security certification
Also see:
This is great resource for learning the linux command line:
Welcome to our community @Nihal