To install sshpass

$ sudo apt-get install sshpass

To pass ssh passwords from a file .secret to ssh login

$ echo 'myPassword' > .ssh_secrets

$ chmod 0400 .secrets

$ sshpass -f ".ssh_secrets" ssh user@remote_server_ip

To pass ssh password direct to ssh login 

$ sshpass -p 'ssh_server_password' ssh username@remote_server_ip

To make backup of all databases without password

$ sshpass -f ".db_secrets" mysqldump -u root -p --all-databases > all-databases_`date +"%Y-%B-%d_%R"`.sql

To make backup using rsync

$ sshpass -f ".ssh_secrets" rsync -a backup/ user_name@remote_server_ip:/home/test/backup

regards,

T.Dhanasekar