Linux：通过ssh连接自动执行sftp文件传输

Question

I need to make a crontab script (executed automatically and periodically) that should find the latest changed file of a folder and then transfer it to another machine, using an sftp connection. The first part of the problem is solved by extracting the name of the desired file:

cd $myFolder
output=$(find . -type f -printf "%C@ %p\n" | sort -rn | head -n 1)
filename=$(echo $output | cut -d'/' -f 2)

But the second part is difficult, because I cannot find the way to type the value of $filename variable in a Linux sftp connection and also the user/password in a non-interactive way. Saving it into a temporary file may be a good solution.

Is there any better alternative?

Thanks

Answer 1

You could use inotify to monitor the directory and trigger on modify . The file name can be fed to rsync or scp . Example:

inotifywait      \
  --quiet        \
  --event modify \
  --format '%f'  \
  --monitor watch_directory |
  while read FILE; do \
  scp watch_directory/$FILE host:/destination;
  done

Answer 2

You could use scp instead of sftp - it uses the same protocol but is more suitable for non-interactive use.

You can find the last modified file in a directory with only ls , if the directory only contains files (no subdirectories):

output=$(ls -t "$myFolder" | head -1)

Answer 3

您可以使用curl通过sftp将文件上传到远程服务器，并在命令中传递登录信用（用户名和密码），如下所示：

curl -T uploadfilename -u username:password sftp://sitename.com/myfile

Answer 4

My solution:

To obtain the filename:

filename=$(ls -t . | head -1)

To transfer the data to the remote server:

#!/usr/bin/expect -f

# A copy of the $sourceFile is sent to the $targetPath by using the scp command (secure copy)

set timeout 20

set sourceFile [lindex $argv 0]
set targetPath [lindex $argv 1]
set user [lindex $argv 2]
set password [lindex $argv 3]

# connect via scp
spawn scp $sourceFile "$user@$targetPath"
#######################
expect {
  -re ".*es.*o.*" {
    exp_send "yes\r"
    exp_continue
  }
  -re ".*sword.*" {
    exp_send "$password\r"
  }
}
interact

The user authentication is delegated to the script that uses this script, and can be made by the generation of a public/private rsa key pair in the remote server, and then using it: Read next link: SSH login without password .