需求：使用sftp命令定时拉取文件

• 原始命令

 1. sftp -oIdentityFile=/student/keys/id_rsa -oPort=8111 xxx.com2. cd /school/download/3. ls4. get xxx.csv

1. 创建脚本down.sh,获取前一天的文件

#!/bin/bash
echo "Starting to sftp..."
# 使用sftp命令连接到远程服务器并执行操作
sftp -b - -oIdentityFile=/student/keys/id_rsa -oPort=8111 xxx.com << EOF
cd /school/download/
# 匹配以昨天的日期开头的所有文件
mget $(date -d "yesterday" +%Y%m%d)*.csv
bye
EOF
echo "$(date -d "yesterday" +%Y%m%d):download success ..." >> /home/sftp_download.log

2. 添加定时任务

# 确保它有执行权限
chmod +x /path/to/down.sh# 编辑cron任务
crontab -e# 添加定时任务
0 1 * * * /path/to/down.sh# 示意* * * * * command-to-be-executed  * - - - -  
| | | | |   
| | | | +---- Day of the week (0 - 7) [Both 0 and 7 mean Sunday, or use names]  
| | | +------ Month (1 - 12)  
| | +-------- Day of the month (1 - 31)  
| +---------- Hour (0 - 23)  
+------------ Minute (0 - 59)

• 可能遇到的问题

-bash: ./down.sh：/bin/bash^M
解决：执行 sed -i 's/\r$//' down.sh