====== Ubuntu - nmap - Scan list of Hosts from a File ====== If you have more hosts to scan and all host details are written in a file, you can directly ask nmap to read that file and perform scans. Create a text file called “nmaptest.txt” and define all the IP addresses or hostname of the server that you want to do a scan. cat nmaptest.txt result: 192.168.1.100 192.168.1.141 192.168.1.169 Next, run the following command with the **iL** option with nmap command to scan all listed IP address in the file. nmap -iL nmaptest.txt result: Starting Nmap 6.40 ( http://nmap.org ) at 2016-07-07 23:47 BST Nmap scan report for 192.168.1.100 Host is up (0.025s latency). Not shown: 989 closed ports PORT STATE SERVICE 80/tcp open http 139/tcp open netbios-ssn 443/tcp open https 445/tcp open microsoft-ds 515/tcp open printer 631/tcp open ipp 6839/tcp open unknown 7435/tcp open unknown 8080/tcp open http-proxy 9100/tcp open jetdirect 9220/tcp open unknown Nmap scan report for android-d8443dafc4d5d365 (192.168.1.141) Host is up (0.021s latency). All 1000 scanned ports on android-d8443dafc4d5d365 (192.168.1.141) are closed Nmap scan report for RP-AC52 (192.168.1.169) Host is up (0.019s latency). Not shown: 998 closed ports PORT STATE SERVICE 53/tcp open domain 80/tcp open http Nmap done: 3 IP addresses (3 hosts up) scanned in 2.39 seconds