使用管道或重定向

#!/bin/bash

# redirecting the for output to a file
for file in /home/tiandi/*
do
    if [ -d "$file" ]
    then
        echo "$file is a directory"
    else
        echo "$file is a file"
    fi
done > output.txt

# piping a loop to another command

for state in "North Dakota" Connecticut
do
    echo "$state is next place to go"
done | sort
echo "This completes our travels"