Match a string that contains a newline using sed

Question

I have a string like this one:

    #
    pap

which basically translates to a \\t#\\n\\tpap and I want to replace it with:

Answer 1

try this line with gawk:

awk -v RS="\0" -v ORS="" '{gsub(/\t#\n\tpap/,"yourNEwString")}7' file

if you want to let sed handle new lines, you have to read the whole file first:

sed ':a;N;$!ba;s/\t#\n\tpap/NewString/g' file