http://stackoverflow.com/questions/16616975/how-do-i-get-the-last-word-in-each-line-with-bash


to retreive the last word in each line:

$ awk 'NF>1{print $NF}' file
example.
line.
file.









To show only differences between two files: (visit site for more info)

http://stackoverflow.com/questions/4717250/extracting-unique-values-between-2-sets-files



$ awk 'FNR==NR {a[$0]++; next} !a[$0]' file1 file2