test script

testgtopb.txt

#! /bin/bash

###Leif Gregory <leif@devtek.org>
###Fake script
###If you're reading this on $paste..bin, then somehow emailing the link to
###a G..Mail account causes it to get posted to paste..bin.

#Usage <scriptname> [option1 | option2]
#i.e. this_script option1

#Get host IP then grep out first octet. 
octet=$(ip route get 8.8.8.8 | grep -oP '(\d{1,3}\.){3}\d+' | tail -n1 | grep -oP '^\d{1,3}')

#Do option1 based on 10. or 192. network
if [ "$1" == 'option1' ]; then
  case $octet in
    10) #10 network
      do something in 10.network 
    ;;
    192) #192 network
      do something in 192.network
    ;;
    *)
      echo 'Something went wrong.'
      echo 'IP first Octet: ' "$octet"
    ;;
  esac

#Do option2 based on 10. or 192. network
if [ "$1" == 'option2' ]; then
  case $octet in
    10) #10 network
      do something in 10.network 
    ;;
    192) #192 network
      do something in 192.network
    ;;
    *)
      echo 'Something went wrong.'
      echo 'IP first Octet: ' "$octet"
    ;;
  esac
fi