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
there are many ways. using wc is one.
wc
wc -l file
others include
awk 'END{print NR}' file
sed -n '$=' file (GNU sed)
sed -n '$=' file
grep -c ".*" file