I have a file with 3 columns of the format
< string > <32 bit number> <48 bit number>
How can I use bash to replace the numbers in 3rd column to be 48 bit random numbers?
That should do the trick:
while read a b c; do echo $a $b $(cat /dev/urandom | tr -dc '0-1' | fold -w 48 | head -n 1) done < input > output
a is the string (I assume there are no spaces),
b is the 32 bit number,
c is the 48 bit number that will not be used subsequently. Instead we replace it with input from