I'm trying to backup some log files (older than 15 days) from a remote server using scp.
I usued:
scp me@remote_machine:`find folder/*.log -mtime +15` .
but don't works!

Someone can help me?
Thanks.

Are you expecting that find to be executed on the machine you're connecting to? It won't be. To use shell commands on a remote host, use ssh.

Thanks Corona688...
can you give me the right commands?

ssh me@remote_machine:"find folder/*.log -mtime +15" > /tmp/remote_list
while read filename; do
   echo "get $filename" >> /tmp/batch
done < /tmp/remote_list
echo "bye" >> /tmp/batch
sftp -b /tmp/batch me@remote_machine

just for future reference, use scp to copy files to and from remote areas.

I agree, but from the OP's first post, it looks like there might be multiple files, and scp might have to be run several times. Since each time scp is run it will have to setup the connection and then release it, an sftp might be better in this case.