wget -m --ftp-user=xxxx --ftp-password=yyy ftp://ftp.dominio.it/www.dominio.it/
nohup comando
Then press ctrl + z which will temporarily suspend the command
bg
This will start executing the command in backgroud
To see what background process that is running you can type command:
$ jobs
rsync -avzu -e "ssh -p 2222" root@xx.xx.xx.xx:/var/www/html/ORIG/* /home/DEST/public_html/ > /home/DEST/public_html/rsync.log 2> /home/DEST/public_html/rsync.err