linux date得到当前时间的毫秒
echo `expr \`date +%s%N\` / 1000000`
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#/bin/bash
declare startTime=`date +%s%N`;
echo `expr $startTime / 1000000`
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#/bin/bash
#test.sh
declare time_now=`expr \`date +%s%N\` / 1000000`;
echo 当前时间毫秒:$time_now;
declare time000n=`date -d \`date +%Y%m%d\` +%s%N`;
declare time_0=`expr $time000n / 1000000`;
echo 当前时间取0时0分0秒的毫秒数:$time_0
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