How to install downloaded zip/tar.gz plugin ?

What platform? Use gunzip.

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Thanks guys for your replies.

You are right, restful_authentication plugin I have installed just
copying to vendor/plugin. I know about activescaffold plugin, it is must
be installed with his css, js and other things, and installing this
plugin can't be simple, maybe need run install.rb, but I don't know from
where need run it. Can you give me example ? And maybe how to emulate
git for this ?

system linux.

Sergio Footenko wrote:

Thanks guys for your replies.

[...]

maybe need run install.rb, but I don't know from
where need run it.

Copy the plugin to vendor/plugins, then switch to the plugin's directory
and run install.rb .

Can you give me example ? And maybe how to emulate
git for this ?

You don't need to emulate git.
Best,

Thank you Marnen, Frederick and Julian for replies. I'll try this
soon.