I want to do online practice for unix cmd...provide solution

just sit down in front of your keyboard and practice....
edit files, copy-move files, start-stop processes, daemons, try to solve problems, find your own goals....

Accessing online Unix machines is not a good idea to learn Linux/Unix. Though I had heard that there are few universities that offer such online server, but I don't remember anyone.

Instead of this, install some VM (VMware or VirtualBox) on your PC, download and install your favourite Linux distro, and start practicing. In this way, you will have admin privileges on that, and you will be able to do 'anything' with your virtual linux machine.

To choose a distro, appear for this test. It's very helpful.

If you face any challange, let's know.

Have a goood luck.

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First, study: http://www.tldp.org/
Second, if you don't want install linux, then use a LIVE CD distro, or a free-shell account (search on google) to learn unix command.
Third, try this if you want

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LiveCD

Have you ever heard about the word "please"?

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I've been personally using linuxzoo.net for practicing. It's been pretty useful so far. I recommend going through the lessons on it, then downloading some thing like VirtualBox and some distributions so you can try out commands for yourself and test what you've learned. You won't become a master right away by any means, but its a really good starting point.

Hello

linuxcommand.org provides a nice tutorial for learning the Linux command line.

The creator of that site, William Shotts, has a book as well that is really helpful in learning also.

Play with this also. http://jpc.sourceforge.net/demos_linuxdemos.html

You could easily run a Suse build at SuseStudio.

@ krradhika03

You can sign for a free unix shell account at http://www.sdf.org/

But you will have limited privileges as a free user. They have membership packages where you can do more.

As everyone said installing linux in a VM will give you experience as a user and an administrator. If you want a more unix like environment, then try freeBSD which is more popular than openbsd and netbsd.

Good luck

Thnx

I didn't ask a question about grammar Mr.whoeverthehellyouare, if u know any online compiler for unix, tell that else just shut your mouth.

Do you mean sudo? http://xkcd.com/149/

You kiddin'? Clearly you never heard about "Netiquette" or "How to ask a question" as well. Two topics that should stimulate your interest, if you are willing to actively participate in technical discussions in a public forum.