Useful Commands

# === Getting Started ===
 
# --- Connecting Using VPN ---
 
# connect to a vpn
sudo openvpn user.ovpn
 
# display currently active network interfaces
ifconfig
 
# display networks accessible by VPN
netstat -rn
 
 
# --- Basic Tools ---
 
# ssh into a server (username@host)
ssh Bob@10.10.10.10
 
# scan a server port with netcat
netcat 10.10.10.10 22
 
 
# --- Service Scanning ---
 
# basic nmap scan
# * PORT - port number and kind (TCP/UDP)
# * STATE - port state
# * SERVICE - typical service (not actual service, requires more in-depth scan)
nmap 10.129.42.253
 
# detailed nmap scan
# * -sC - obtain more detailed info
# * -sV - perform a version scan
# * -p- - scan all 65,535 ports
nmap -sV -sC -p- 10.129.42.253
 
# ftp into a server
ftp 10.129.42.253