One really important first thought is that Linux commands and Linux filenames are case specific. A file named TkEmc.txt is not the same file as Tkemc.txt. Most of the time a Linux program WILL NOT find TkEmc.txt if you tell it to find Tkemc.txt or tkemc.txt. The command ``CD'' is not the same command as ``cd'' is. When you are in the middle of a text based session and you ask to see the contents of a file and the answer comes back