Can Anyone please suggest me the best institute to learn Linux through online.

You can stick to this forum, answer questions, ask questions and read threads.. you will learn fast and stick to the current flow of linux.

I second that. In fact, I do that. During the day I spend a lot of time doing repetetive system admin garbage, and getting on to LQ and helping out with some bash scripting, php, sendmail, postfix helps keep the skills sharp and makes the day shorter.

Also, try getting onto IRC and the linux, bash, docker and related channels. Learning to answer quick might help you along the way.

Now - to what you really meant - you need look no further than linuxfoundation.org itself, which is the company that pays LT to keep running the development of Linux, and holds the trademark of Linux.

http://training.linuxfoundation.org/free-linux-training

I agree with my fellows. Answering questions here is a great teacher--and, if you get something wrong, someone will come along to correct you, and, since this is Linux Questions, they will normally do so courteously.

Often, I try to answer questions here when I don't know the answer for myself--I have to find it, and, in the process, I learn for myself. (It's also a great way to perfect your google-fu.)

I've also learned a lot by listening to Linux podcasts. There are lots of great ones, many good ones, and a few lousy ones, some newsy and some techy and some a mix. And that's something you can do while doing something mindless, such as yard work or dishes or laundry.

Going back to your original question, I have heard nothing but good things about the LPI.

Agree with the strategy of keeping an eye on the forum. One thing I do is subscribe to threads I have no idea about, but could learn from. That way when someone does answer on them, I benefit by seeing that information. For the most part I do regularly check the zero reply threads on a daily basis.

I also feel that learning Linux does involve using Linux. In my case, programming and scripting. Therefore if someone posts a program or script with a question or as a solution, a good idea is to have a scratch area where you compile or run what was posted in actual or modified form. That helps in general to grow your knowledge.

But it also depends what your learning concentations are. If you're interested in being a sysadmin, then perhaps you'll pay more attention to the forums related to servers.

The web is also great for learning, although I feel you sort of have to pick a focused topic area to work on. Because if you just search for the term "linux", you'll find a ton of varied results. Say for example you wish to learn about the command line more, then a better search term might be "linux command line" and even then if you have auto-complete you may see additional trailers to that which may make the whole term become "linux command line cheat sheet", where you'll find a bunch of pages where people show their examples.