Links:
https://labs.portcullis.co.uk/tools/enum4linux/#:~:text=Enum4linux%20is%20a%20tool%20for,%2C%20rpclient%2C%20net%20and%20nmblookup.
https://github.com/CiscoCXSecurity/enum4linux
https://www.nephack.com/metasploit-basic-enumeration
https://asecuritysite.com/csn10107_lab05.pdf