Extract IPs from file

ipextract.sh

#!/bin/bash

# Check if a filename is provided as an argument
if [ $# -ne 1 ]; then
    echo "Usage: $0 <filename>"
    exit 1
fi

filename="$1"

# Read the file line by line
while read -r line; do
    # Modify the regex pattern as needed for your specific use case
    ip_regex='([0-9]{1,3}\.){3}[0-9]{1,3}'
    
    # Extract IPs from the line
    while [[ "$line" =~ $ip_regex ]]; do
        ip="${BASH_REMATCH[0]}"
        #echo "Found IP: $ip"
        echo $ip
        line="${line/${BASH_REMATCH[0]}/}"
    done
done < "$filename"