Linux notes executes the SCP in the background, enabling no password file copies between servers.

Remote backup large capacity often there is the case that the file from remote backup is very large, it takes a long time, you want to exit SSH after the program can still continue to download in the background, can be established through the establishment of inter-server security information relationship and nohup way to solve.

There are two servers: a server IP 192.168.3.100, b server IP 121.41.111.46.

I. Establish a secure trust relationship certificate between servers

1. Generate key pairing on Server A

The a server generates a pairing key, and when prompted, leave the default to hit Enter,

[[Email protected] ~] #ssh-keygen-t RSA

The public key is saved in the. SSH directory of the user host directory, such as the root user will be placed in the/root/.ssh/id_rsa.pub.

2. Copy public key to B server

Copy the Id_rsa.pub file that you just generated from a server to the ~/.ssh/directory of the B server and rename the file to Authorized_keys.

[[Email protected] ~] #scp ~/.ssh/id_rsa.pub 121.41.111.46:/root/.ssh/authorized_keys

3, A, b server between the non-secret copy

After the above operation, you can implement a server does not require a password to obtain the file B server, SCP, sssh command.

[[Email protected] ~] #scp [email protected]:/data./

Second, nohup implementation to close the SSH window after the program can continue to run in the background

Nohup scp.sh &

Linux notes executes the SCP in the background, enabling no password file copies between servers.