Networking

- Check if a host is up and scan for open ports, also skip host
discovery.

README.md

@@ -1820,6 +1820,23 @@ ulimit -u
 nmap -sT -O localhost
 #notice that some companies might not like you using nmap
 ```
+##### Check if a host is up and scan for open ports, also skip host discovery.
+#skips checking if the host is alive which may sometimes cause a false positive and stop the scan.
+$ nmap google.com -Pn
+
+# Example output:
+# Starting Nmap 7.01 ( https://nmap.org ) at 2020-07-18 22:59 CST
+# Nmap scan report for google.com (172.217.24.14)
+# Host is up (0.013s latency).
+# Other addresses for google.com (not scanned): 2404:6800:4008:802::200e
+# rDNS record for 172.217.24.14: tsa01s07-in-f14.1e100.net
+# Not shown: 998 filtered ports
+# PORT    STATE SERVICE
+# 80/tcp  open  http
+# 443/tcp open  https
+#
+# Nmap done: 1 IP address (1 host up) scanned in 3.99 seconds
+
 
 ##### Print out number of cores/ processors
 ```bash