HI,I am a fresher of Linux user,please tell me how to install .so file?

I have moved your post to it's own thread in the Linux-Newbie forum as it had nothing to do with the thread you posted to. Can you tell us more about the file you are trying to install - like which distro, what the file does, etc etc

I would like to see some discussion on this question.
I have an intel Mac mini, and usually boot into OS X. I have many X11 apps, mostly installed by fink.
But they don't have any plugins! I thought since it is an intel machine, maybe I could just copy over libflashplayer.so, etc, from my ubuntu thumb drive but it doesn't seem to work.

maybe I was a little too brief.
when I said they don't have any plugins, I mean the fink repository doesn't have any browser plugins.
I'd like to get flash working in the X11 version of firefox, and I don't see what should be so hard about that.
But I'm not a programmer, it must be difficult or someone else would have done it by now.

To the original poster:
If it's the flash plugin, here is one place to put it:
~/.mozilla/plugins/libflashplayer.so
~/.mozilla/plugins/flashplayer.xpt

your distro may also have /usr/share/plugins or /usr/lib/plugins or some place like that.