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

Trick copyright: Bash-Oneliner <https://github.com/onceupon/Bash-Oneliner>

#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

click the source code to copy