301 Redirect for idiots - Advice please

Please explain this in simple terms for me.

I have a site with several internal pages that rank quite well. I am switching to a new database site that will change url of internal pages.

www.mysite.com/widgets.asp
will become
www.mysite/widgets.aspx

I know i need a 301 redirect but how is this done and when do I put the command?

Thanks in advance
An idiot.

 

Probably a simple rule would suffice:

RewriteRule (.*).asp$ $1.aspx [R=301,L]

Code (markup):

I don't know if that's the most efficient way.

 

you need to put this

 

if i use this code will google penalize me?

 

What if the urls are changing

www.mysite.com/widgets.asp
to
www.mysite.com/widget-solutions.aspx

You say 'put this code' - Where do i put it? On old site server or new site? Does it go in a folder somewhere or on the webpage.

 

I bet the owner of www.mysite.com gets lots of free links

 

That will be PAINFUL

RewriteRule ^widgets.asp$ widget-solutions.aspx [R=301,L]

Code (markup):

Do that for every page ;-)

Warning: untested code !!

Yeah, mysite, yoursite, domain.com, test.com and google ) they all get lots of free links.

 

Not too painful. Site has about 10 key pages that are important for SEO purpose.

So i create some code but where do i put it???