What is the command(s) to uncompress tar archive?!?

[Peter Williams]

Hi All,

I have a tar archive "user_backup_20080918.tgz" -- which is 19.4 GB of data
which was previously my home folder, with many sub-folders, for my (old)
user name 'user'.

I have since reinstalled Linux... actually a new installation of Linux
Ubuntu Mint. Now I want to uncompress the archive to my new home folder with
my new user name of 'peter'.... what are the commands I need to do to
achieve this?!?

note that the archive contains:

user_backup_20080918.tgz (19.4 GB filesize)
 + user (folder)
     + many folder and sub-folders here, as well as hidden files with
leading dots in their filenames.

eg. would need to uncompress folders inside 'user' folder (old user name) to
current 'peter' user (home) folder.

I'm guessing that I'd need to use the chown (change owner) command -- but I
don't know how it works... I think I'd need to run it recursively on
sub-folders... correct?!? How do I do this?

Regards,
       PEW  ;-)))

-- 
Fond Regards,
Peter Eric (aka 'pew') WILLIAMS
from Hobart, Tasmania, Australia -- phone (03) 6236-9675

My free website is: http://pewtas.googlepages.com  (or)
http://tinyurl.com/yuyejs

(please visit my free website and let me know what you think about it.)
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