shell之for循环

for((i=1;i<=10;i++));do
echo $(expr $i \* 4);
done

for i in $(seq 10)；do
done

for i in `ls`;do
done

for i in ${arr[@]};do
done

for i in $* ; do
done

for File in /proc/sys/net/ipv4/conf/*/accept_redirects; do
echo $File
done

for i in f1 f2 f3 ;do
echo $i
done