I didn't get any errors when unpacking it. I think I may see the problem. I had mistakenly put data.tar.gz in /usr and ran the tar command from there, so there's actually a /usr/usr/bin instead of /usr/bin. I'm not sure if that makes a difference or not. Anyhow, here are the results from those commands.

empeg:/empeg/bin# df /

df: Warning: cannot read table of mounted filesystems: No such file or directory



Filesystem           1k-blocks      Used Available Use% Mounted on

-                        15863     13949      1914  88% /

empeg:/empeg/bin# echo $PATH

/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin:/empeg/bin

empeg:/empeg/bin# ls -ld /usr/bin

ls: /usr/bin: No such file or directory

empeg:/empeg/bin# ls -ld /usr/usr/bin

drwxr-xr-x    2 0        0            1024 Jul 31 11:01 /usr/usr/bin

empeg:/empeg/bin# ls -l /usr/usr/bin

total 4

-rwxr-xr-x    1 0        0            3448 Jul 31 11:01 tclsh8.4

If that is the problem, should I just try it again from the root directory?