bash 快速产生随机数

int32位 posted @ Oct 30, 2013 11:34:09 PM in 未分类 , 2544 阅读
转载请注明：http://krystism.is-programmer.com/若有错误，请多多指正，谢谢！

最简单的方法是读取RANDOM环境变量，比如生成100以内的随机数，可以这样运行：

echo $((RANDOM % 100))

第二种是调用awk中的rand方法，

awk 'BEGIN{print int(rand() * 100)}'

第三种方法是使用shuf命令：

seq 1 99 | shuf -n 1

其他方法类似读取/dev/random 或者 /dev/urandom 则比较复杂。

另外也可以通过调用perl、python、 php等产生随机数，并且都支持单行解释。

转载请注明：http://krystism.is-programmer.com/若有错误，请多多指正，谢谢！
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