# Perform a fast scan on IP addresses listed in the 'scope' file and save the results to 'fast_scan'
sudo nmap -iL scope -F | tee fast_scan
sudo
: This command is used to execute the subsequent command (nmap
) with superuser privileges. It is often required for certain network-related tasks that need elevated permissions.nmap
: This is the main command.nmap
is a powerful network scanning tool used to discover hosts and services on a computer network, identifying open ports, and more.-iL scope
: This option specifies a file (scope
) containing a list of target IP addresses. the-iL
flag indicates that it's an input file.-F
: This flag tellsnmap
to perform a fast scan. It scans only the most common 100 ports for each target, which can significantly reduce the scan time.|
(Pipe): The pipe operator (|
) is used to pass the output of thenmap
command as input to the next command (tee
in this case).tee fast_scan
:tee
is a command that reads from standard input and writes to standard output and files simultaneously. In this context, it writes the output of thenmap
command to a file namedfast_scan
in addition to displaying it on the terminal.
So, in summary, this bash command uses nmap
to perform a fast scan on a list of IP addresses specified in the file named scope
. The results are both displayed on the terminal and saved to a file named fast_scan
. The use of sudo
indicates that elevated privileges might be needed for certain aspects of the network scan.