This tool can extract sudomains from https://chaos.projectdiscovery.io/
and save into output file.
go install github.com/rudSarkar/chaosextract@latest
chaosextract [options]
-c
: Number of concurrent download threads (default 30)-o
: The name and location of the output file
chaosextract -c 60 -o /tmp/chaos-sub.txt