[SOLVED] How to transfer files between Ubuntu servers so that A logs to B with key and gets the file without B logging to A?

Issue

1. I have a key on machine B that with it can log to machine A
2. on machine A I can run a script to create archive dump from database
3. Now I wish to get this archive from A back to B

PROBLEM! I want to ONLY HAVE ONE KEY file on machine B to connect to machine A and avoid having another key on machine A to connect back to machine B

Im trying to do this with scp command,

scp -i key_file `date +"%m-%d-%y".gz` [email protected]:`date +"%m-%d-%y".gz`

Problem here is that while I am logged into machine B, and I run this I need to have another key_file on machine A.

Could I achieve this somehow by only having one key on machine B, use that to operate in machine A and get the file out without having another key?

I want to limit security threats and not have two keys so that if machine A gets jacked it wont have access to B.

Solution

If you can ssh into computer A from computer B, then you can do an scp command from computer B to retrieve the file from computer A back to computer B, as well. Run this command from computer B:

scp -i your_key [email protected]:/path_to_file_in_comp_A/file /path_in_comp_B/

where you need to substitute the correct key file, usernames, ip addresses, and paths to the command.

Answered By - wxz