[R] Removing duplicate packages...

[Petar Milin]

Hello!
I am using R version 2.6.1, under Ubuntu 6.06 (Dapper Drake). Recently I 
have realized that I have, in some cases, two or even three instances of 
the same package; for example: cluster, foreign etc. Typically, two 
instances occur in one of the three location: 
"/usr/local/lib/R/site-library", "/usr/lib/R/site-library", or 
"/usr/lib/R/library", and the third is, I suppose, part of the core system.
I would really like to clean up my system, but the question is how to do 
that. Can anyone help me, please?

Sincerely,
PM