###for循环

#遍历目录下的脚本文件
for i in `ls *.sh $1`; do echo $i; sleep 2; done
# ``表示系统命令
for i in `ls *.sh $1`
do 
bash $i
sleep 2
done

#遍历硬盘，排除系统盘。不考虑nvme硬盘
for disk in /dev/sd[a-z];do
    if [ "$disk" != `df| awk '{print $1}' | grep -o "/dev/sd[a-z]"| sed -n '1p'` ];then
        echo ${disk##/*/}
    fi
done

for i in {0..3}
do
  for j in {0..3}
  do
    if [ $i != $j ];then
    echo mlx5_$i mlx5_$j
    fi
  done
done
#并行循环 &
for i in {1..3}
do
    {
        ehco &i
    }&
done