I was wondering why some programs weren't loading (particularly a game of nethack). So, when I tried the nethack command it said nethack is available in /usr/games but it's not in the path, so, i did a quick look up of the $PATH variable, and i got this:

/opt/kde3/bin:/opt/kde3/games:/usr/local/sbin:/usr/local/bin:/opt/kde3/sbin:/usr/sbin:/opt/kde3/bin:/usr/bin:/sbin:/bin:/opt/oracle/instantclient_10_2:/opt/cuda/bin: No such file or directory

What is the PATH var supposed to be? this is also affecting my laptop (i'm using BT4 on my desktop as well), and it seems that there may be other files missing. It was working before, but it seems to be just working odd now.