random - random lines from a file or random numbers
random [-er] [denominator]
random reads lines from the standard input and copies them to the standard
output with a probability of 1/denominator. The default value for
denominator is 2.
The options are as follows:
-e If the -e option is specified, random does not read or write anything,
and simply exits with a random exit value of 0 to
denominator - 1, inclusive.
-r The -r option guarantees that the output is unbuffered.
BSD March 31, 1994 BSD
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