Problem with data and manual files under LINUX

[MR MARK ADAMS at TEC at FLW DCD]

Good morning,

   I am running GRASS under LINUX and I'm experiencing some problems:

   Using the command - cat sfcpioz* | uncompress -c | (cd /usr ; cpio -icdu)

    I have been able to load the Spearfish data set.  The problem is this 
command, and every other variant of cat, zcat, uncompress, gzip, and cpio will 
not work to load the world dataset, the Imagery data set or the installg.z 
manual.

    I must be missing something simple...  HELP !

Thanks


Mark @USAES,FLW