当我在Linux机器上使用tcpdump时。发生错误：
$#/usr/sbin/tcpdump dst 183.131.XXX.XXX
tcpdump: can't create rx ring on packet socket: Cannot allocate memory
$#free -m
total used free shared buffers cached
Mem: 32111 30685 1426 0 4541 13533
-/+ buffers/cache: 12610 19501
BASIC INFO:
$#uname -a
Linu xxxx.xxxxxx.com 2.6.32_1-15-0-0 #1 SMP Fri Sep 01 15:37:59 CST 2010 x86_64 x86_64 x86_64 GNU/Linux
谁能帮帮我？很多！