I am a new Linux user.
 

I am a new linux user. I have a few experience in using it. So, what should I do after I installed Ubuntu? And I want to know how to use powerful commend-line. Thank you.

CLI tutorial http://rute.2038bug.com/index.html.gz

What you do is up to you; what do you want to do ??
eg SysAdmin, DBA, Networking, Programming?
If Programming, waht area eg Networks (tcp/ip), Databases, SysAdmin automation, GUIs, calculations etc, etc ?

For general learning, combine reading/trying that tutorial and reading/answering qns here at LQ.

Thank you
 

Thank you.

Best wishes,

Phearun

Hi and welcome to LQ!

http://www.tldp.org/

Thank you
 

Thanks you.

Best wishes,

Phearun

To learn more and get used to your new OS you should just use it full time for your everyday computing activities, play your music in it, surf the web in it, watch your movies in it and manage your files.
That way you will learn how to do everything from it.

For the command line you will have to read on the forums and some books that you can find perhaps in your local library.

Good luck to you

Welcome to the wonderful world of (GNU/)Linux, and welcome to LinuxQuestions.org!

As for what you *should* do, well, I'd start off by installing software you might be interested in using; have a gander at the Software Center and see if anything interests you. My own must-haves tend to be LibreOffice (for spreadsheets and presentations), Audacity (for audio recording), and VirtualBox (for running virtual machines).

If you have any Windows software you can't live without (and/or doesn't have a Linux equivalent, as is the case with most games), give Wine a whirl (should be a matter of running "sudo apt-get install wine" via command-line); that'll allow you to run most Windows programs (though be prepared for a couple of bugs). If that fails, most software should run quite comfortably in a virtual Windows machine (via VirtualBox); supposedly, this works well for running iTunes if you happen to own an iDevice.

Thank you
 

Thanks for your comment.

Best wishes,

Phearun

Thank you
 

Thanks you for your comment.

Best wishes,

Phearun