I have lines like these, and I want to know how many lines I actually have...
09:16:39 AM all 2.00 0.00 4.00 0.00 0.00 0.00 0.00 0.0
wc -l file_name
for eg: wc -l file.txt
it will give you the total number of lines in that file
for getting last line use tail -1 file_name