How do I remove a section from a config file using a regex match?

You can make use of AWK's record separator feature to easily delete the block. Here's a command you might find helpful: `awk -vRS= -vORS='nn' -vNEEDLE='Name=alicew' '!match($0, NEEDLE)' file`. This will read the blocks defined by empty lines and remove any that match your condition. Just a heads up, this adds two newlines at the end of the output by default.

I thought about using sed for this since it's often efficient, but keeping it understandable is key. Here’s a sed script that builds the block in memory and prints it based on conditions:
`sed -n '/^$/ {x; p; b} /^Name=alicew$/ { :loop; n; /^$/ {h; b}; $ q; b loop}; 1 {h; b}; H; ${g; p}'`. It's a bit complex but should do the job well.

For a straightforward approach, gawk can handle this quite easily! Here's a script you can try:
```
function process_section() {
if (!skip_section && section) {
printf section
}
section = ""
skip_section = 0
}
BEGIN {
skip_section = 0
section = ""
}
/^[.*]$/ {
process_section()
section = $0 "n"
next
}
/Name=alicew/ {
skip_section = 1
}
{
section = section $0 "n"
}
END {
process_section()
}
```
Just run it with your input file, and it should produce your desired output.

If you're open to using Perl, here's a quick regex that should do the trick: `perl -p -0 -e 's/((?!nn)[wW])*Name=alicew((?!nn)[wW])*//g' $FILE`. You can add the `-i` option to edit the file in place.