How can i add a character(#) in the beginning of every line in a .dat file
sed -i -e 's_.*_#&_' input.dat
one more,
awk '{ printf "#"; print }' <filename>
How can i add a character(#) in the beginning of every line in a .dat file
sed -i -e 's_.*_#&_' input.dat
one more,
awk '{ printf "#"; print }' <filename>