Remove carriage return from windows file and create new file. Exclude some files (from a directory) and concatenate into a one big file.

concatenate.sh

#!/bin/bash
# Remove carriage return from windows file <CR> and createa a new file
tr -d '\015' < windows_file > another_file
# Exclude some files prior concatenation
ls | sort | grep -v -E "(file1|file2|...|fileN)" | xargs cat > large_file