By Default TAB-Completion is not useful if the name of file or directory starts with an UpperCase. You can make your Shell totally ignore the case(in-case sensitive) by adding following entry in /etc/inputrc file(you need root access).

set completion-ignore-case on

Save the file and restart your Shell. From now onwards TAB-completion will completely ignore the case for file or directory.

for complete man page type:

man readline