【shell】 for循环

#!/bin/bash
for i in 1,3,4,6 ##有几个数就循环几次
        do
                echo $i
        done

for m in $( cat /root/num.log)  ## /root/num.log有几行就循环几次
        do
                echo -e "$m \n"  ##echo -e 才能识别“\n”
        done       

read -p "please input default name: " name
read -p "please input num of users: " num

if [ ! -z "$name" -a ! -z "$num" ]  ###需要注意的是！和 -z中间必须有空格
        then
                y=$(echo $num|sed ‘s/[0-9]//g‘)  ##判断是否为纯整数
                if [ -z $y ]
                        then
                                for ((i=1;i<=$num;i=i+1))
                                        do
                                                echo "add user $name_$i"
                                        done
                fi
fi