mfyang

摘要： ```shell # cat /dev/urandom |od -x |awk '{print $2,$3,$4}' |head -n 1 |sed -e 's/[[:space:]]//g' -e 's/\(..\)\(..\)\(..\)\(..\)\(..\)\(..\)/\1:\2:\3:\4:\5:\6/g' e7:43:de:52:5d:57 ``` 阅读全文