Fix username check

Author: sileshn

bash_profile

@@ -122,7 +122,7 @@ select yn in "Yes" "No"; do
 				echo -e ${red}" Blank username entered. Try again!!!"${txtrst}
 				echo -en "\033[1A\033[1A\033[2K"
 				username=""
-			elif grep -q "$username" /etc/passwd; then
+			elif grep -q "^$username" /etc/passwd; then
 				echo -e ${red}"Username already exists. Try again!!!"${txtrst}
 				echo -en "\033[1A\033[1A\033[2K"
 				username=""