#for ls for i in `ls`; do echo $i done #for File for File in /proc/sys/net/ipv4/conf/*/accept_redirects; do echo $File done #直接指定循环内容 for i in f1 f2 f3 ;do echo $i done #C 语法for 循环: for (( i=0; i<10; i++)); do echo $i done