My notes about some privacy issues like mac change, hostname change on ubuntu OS. And how to make script.
CHANGE MAC ADDRESS AND HOSTNAME UBUNTU
CHANGE MAC TEMPORARY
1. $ sudo ifconfig wlp1s0 down To disable interface
2. $ sudo ifconfig wlp1s0 hw ether 66:66:66:00:00:00 To change MAC
3. $ sudo ifconfig wlp1s0 up To start interface with new MAC address
4. But is changes MAC only once, after restart it goes back.
CHANGE HOST NAME
5. Its saved in etc/hosts You could change it with $ hostnamectl set-hostname Petya
CREATING SCRIPT TO CHANGE ON RANDOM VALUES
6. $? holds status of previously command, 0 means TRUE
7. To generate random number do.
$ RANDOM=$(date | cut -b23-24) //Set generator from time randomly
$ echo $RANDOM | cut -b1-2 //Use only first two numbers
8. Finnal script
|
#!/bin/bash #Script for automaticly change MAC and Hostname RANDOM=$(date | cut -b23-24) #Init random from date ifconfig wlp1s0 down if [ $? == 0 ]; then #if previous command succeeded set new MAC printf "Interface down" ifconfig wlp1s0 hw ether $(( $RANDOM % 99 + 10 ))":"$(( $RANDOM % 99 + 10 ))":"$(( $RANDOM % 99 + 10 ))":"$(( $RANDOM % 99 + 10 ))":"$(( $RANDOM % 99 + 10 ))":"$(( $RANDOM % 99 + 10 )) else printf "\n Error: Interface is not down" exit 1 fi #We are trying to set MAC couple of times until success because not all random numbers suitable to be MAC. until [ $? == 0 ]; do ifconfig wlp1s0 hw ether $(( $RANDOM % 99 + 10 ))":"$(( $RANDOM % 99 + 10 ))":"$(( $RANDOM % 99 + 10 ))":"$(( $RANDOM % 99 + 10 ))":"$(( $RANDOM % 99 + 10 ))":"$(( $RANDOM % 99 + 10 )) done if [ $? == 0 ]; then printf "\n Success. MAC changed!: " ifconfig wlp1s0 up else printf "\n Error: MAC is not changed...Sorry man" exit 1 fi if [ $? == 0 ]; then #We install new random host name ifconfig wlp1s0 | grep "ether" | cut -d " " -f 10 printf "Success. Interface is up!" hostnamectl set-hostname $RANDOM else printf "\n Error: Interface is no up...Sorry man" exit 1 fi if [ $? == 0 ]; then printf "\n Success. Hostname changed!: " hostname else printf "\n Error: Hostname isn't changed...Sorry man" exit 1 fi |
HOW TO AUTOSTART SCRIPT
9. Need to move script to /etc/init.d/ directory
10. sudo update-rc.d startup_file.sh defaults //Update startup file
What is Machine ID and boot id from hostnamectl ?