echo $RANDOM 的范围是？(linux)

范围是 [0, 32767]

man bash， 搜索 RANDOM 可以看到说明

RANDOM Each time this parameter is referenced,
a random integer between 0 and 32767 is
generated. The sequence of random num
bers may be initialized by assigning a
value to RANDOM. If RANDOM is unset, it
loses its special properties, even if it
is subsequently reset.