All you need to know about OS course is just right here.
All of the basics and frequently used Linux Commands in one page.
Place where you can learn anything about IT. This website contains tons of free and paid online course that very useful for Developers.
Contains tons of usefull informations about regular expressions in Grep (Linux). You can learn about Regex, Anchoring, Literal Matches, Brackets Expressions, Quantifiers, Alternation, Grouping , and Special Backslash Expressions.
Biggest community to find a solution of programming problems and IT related things. I personally use this website very often to help me solve my programming problems in Web Developing and Mobile Developing. This website is very helpful for students and junior programmers.
This web can help students about time management. You can create a reminder about a upcoming classes, assignments, and other tasks. I personally use this website to help me manage my time in my college life.
If you have University of Indonesia email, you can access this web. This web can help academics to gain access to some international indexing for public research papers. So they can read get alot of useful informations from past research.
Disc Udemy is the place where all Udemy Course discount is gathered. So you can see all the dicounted course on Udemy in one place. This website helps me get tons of paid course for FREE. What a deal!
This website helps mobile developers on making mobile applications with Flutter. You can see flutter documentations, how to download, and flutter community here. I personally like this website because flutter is a new framework and i personally love mobile development.
This website give a guide on how to build LFS system on Linux From Scratch.