Shell编程笔记

#! /bin/bash
first=$1
second=$2

while [ "$first" != "$second" ]
do
echo $first
let first=`date -d "-1 days ago ${first}" +%Y%m%d`
done

IFS="
"

for LINE in $(cat /etc/passwd)
do
echo $LINE
done

ssh root@${ip} "(echo '<crontab command>' ; crontab -l) | crontab"