Question

I am able to replace the string AllowOverride None with AllowOverride All in the block , but I am only able to print the block of text that matches.

How do I print the text before and after the match?

awk '
/<Directory \/var\/www\/>/, /<\/Directory>/ {
  sub(/AllowOverride None/,"AllowOverride All")
  print
}
' /etc/apache2/sites-available/default

Answer 1

You can just perform the substitution without printing in the first clause, and then add a second clause to print every line. Like this:

awk '
/<Directory \/var\/www\/>/, /<\/Directory>/ {
    sub(/AllowOverride None/, "AllowOverride All");
}
{
    print;
}
' /etc/apache2/sites-available/default

I did a quickie test of this, and I believe it will work.