installing modules for a *nix eager studying newbie

i'm using an install of yahoo sucker as a study
project for getting a better handle on the terminal
and installing of perl modules et al on my Mac running
os 10.2.8

all was going well installing the missing perl modules
until I hit this error 

sh:
y/sources/authors/id/G/GB/GBARR/Bundle-libnet-1.00.tar.gz:
No such file or directory
tar: End of archive volume 1 reached

tar: Sorry, unable to determine archive format.
y/sources/authors/id/G/GB/GBARR/Bundle-libnet-1.00.tar.gz:
No such file or directory
Couldn't uncompress
y/sources/authors/id/G/GB/GBARR/Bundle-libnet-1.00.tar.gz

would someone be able to point me in the direction of
how i could solve this in a manner in which i could
build upon what i learn to approach a similar
situation in the future more intelligently?  i'm
studying unix through a unix for mac book and some
linux books.  

thank you. 

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