git clone 
cd crtshRecon
pip install -r requirements.txt

usage: crtshRecon.py [-h] [-r RETRIES] [-t TIMEOUT] [-s SLEEP] [-l LIMIT] [-d DATE] [-p] [-q] [-db] [-w] [-f] domain

positional arguments:
domain

options:
-h, --help            show this help message and exit
-r RETRIES, --retries RETRIES
                        The number of times to retry if there is a failure. Defaults to 2.
-t TIMEOUT, --timeout TIMEOUT
                        The number of seconds to wait before an attempt times out. Defaults to 60.
-s SLEEP, --sleep SLEEP
                        The number of seconds to wait in between attempts. Defaults to 5.
-l LIMIT, --limit LIMIT
                        Limit the results in the crt.sh query (DB only). Can help stability. Defaults to 5000.
-d DATE, --date DATE  Restrict search to certs not valid before the indicated date (DB only). Can help stability. Defaults to 4 years ago.
-p, --primary-domain  Restrict results to those related to the passed-in domain
-q, --quiet           Just print results (and not status messages). Kinda rude, though.
-db, --database       Query crt.sh via DB. NOTE: The crt.sh DB dataset is not fully up-to-date with the web dataset
-w, --web             Query crt.sh via web
-f, --failover        Failover to either web or db queries if the initial option hits the retry limit