GoBuster

Default Scan

gobuster dir -u $IP -w /usr/share/wordlists/dirbuster/directory-list-2.3-small.txt

Filter Extensions

gobuster dir -u $IP -w /usr/share/wordlists/dirbuster/directory-list-2.3-small.txt -x php,py,js,css,html,txt

Find Subdomains

gobuster vhost -u $IP -w /usr/share/seclists/discovery/dns/