I have multiple directories (different names) which contain text files of he same name. I have to extract lines (numerical values) from those text files and create a single text file with a list of those values. The text file should be in the following format:SubjectID  Metabolite_Cr_Conc  Metabolite_Cr_%SD   S/N   FWHM 2012       2.900               58                  2     0.0532901       4.1                 41                  1.5   0.562301       3.9                 29                  5.0   0.01and so on.I typically use cat -n for specific line numbers to get the data above  (line# for each metabolite are other numerical values are same across all subjectID). 
data from text file in a form of text
scripting;cat