WAN interface configured with DHCP so address is changing constantly. Wanted to build a script that would determine IP address and upload to remote server using sftp or scp.
This is incomplete right now, it lacks the upload ability.
Schedule script to run every every 15 minutes using cron.
#!/bin/bash
# Print layer 2 and 3 interface statistics to file
ifconfig pppoe0 > pppoe.txt
#Find line that includes IP addresses, remove pppoe.txt
awk '/inet/' pppoe.txt > addresses.txt
rm pppoe.txt
# Print 2nd field
awk -F: '{print $2}' addresses.txt > address.txt
# Remove addresses.txt, no longer needed
rm addresses.txt
# Extract IP address from string
temp=$(<address.txt)
echo "$temp" | grep -o '[0-9]*.[0-9]*.[0-9]*.[0-9]* '
# Remove address.txt, no longer needed
rm address.txt