Select lines from text file

## The first line only

head -1 mds_out_2014-01-01_2014-01-31_2014-06-28.csv > tmp

## Get the second line only

sed -n 2p mds_out_2014-02-01_2014-02-28_2014-06-28.csv >> tmp

## Get line 10th to 20th (11 lines)

sed -n '10,20p' mds_out_2014-02-01_2014-02-28_2014-06-28.csv >> tmp

## get all lines from 2nd line to the end

tail -n +2 mds_out_2014-02-01_2014-02-28_2014-06-28.csv