I have 3 Linux machines, namely client, server1 and server2.

I am trying to achieve something like this. I would like to copy the latest file in a particular directory of server1 to server2. I will not be doing this by logging into server1 directly, but I always log on to client machine first. Let me list down the step by step approach which is happening now:

1. Log on to client machine using ssh
2. SSH into server1
3. Go to directory /home/user1 in server1 using the command ls /home/user1 -Art | tail -n 1
4. SCP the latest file to /home/user2 directory of server2

This manual operation is happening just fine. I have automated this using a one line script like below:

ssh user1@server1 scp -o StrictHostKeyChecking=no /home/user1/test.txt user2@server2:/home/user2

But as you can see, I am uploading the file /home/user1/test.txt. How can I modify this script to always upload the latest file in the directory /home/user1?

CodePudding user response：

If zsh is available on server1, you could use its advanced globbing features to find the most recent file to copy:

ssh user1@server1 \
  "zsh -c 'scp -o StrictHostKeyChecking=no /home/user1/*(om[1]) user2@server2:/home/user2'"

The quoting is important in case your remote shell on server1 is not zsh.

CodePudding user response：

You can use SSH to list the last file and after user scp to copy the file as follow:

FILE=$(ssh user1@server1 "ls -tp $REMOTE_DIR |grep -v / | grep -m1 \"\""); scp user1@server1:$FILE user2@server2:/home/user2

Before launch these command you need to set the remote directory where to search for the last modified file as:

REMOTE_DIR=/home/user1