crontab -e

0 8 * * * /usr/bin/submonitor

git clone https://github.com/xpl0ited1/submonitor/
cd submonitor
go build main.go

./submonitor -h
submonitor v1.0.3
 -arf
        if specified the tool will report the subdomains to ARF API
  -b    if specified the tool will try to bruteforce subdomains
  -c string
        path to the config.yaml file (default: $HOME/.config/submonitor/config.yaml) 
  -dt int
        timeout for dns queries when bruteforcing (default 5000)
  -r string
        dns server using for resolving subdomains. ex.: 8.8.8.8:53
  -t string
        path to the targets.txt file (default: $HOME/.config/submonitor/targets.txt)
  -w string
        path to the wordlists that will be used to bruteforce subdomains (default: $HOME/.config/submonitor/brute.txt)