rsync at remote server

without password:
ssh-keygen [WITHOUT entering any passphrase]

ssh-copy-id user@remote-host (example: ssh-copy-id altair)

nohup rsync -avz mathar@cheetah:~/* /newdir &



With password file:
nohup rsync -avz --password-file=/home/mathar/cheetah/password.text mathar@cheetah:~/* newdir &