# rsync with remote sudo
# copy files that require root permissions from local host to remote with ssh/rsync

# creating some files on host_a with root permissions to copy
# sudo mkdir /root/backup_test
# sudo touch /root/backup_test/something.txt
# sudo chmod 600 /root/backup_test/something.txt
# sudo ls -lah /root/backup_test
  # total 8,0K
  # drwxr-xr-x  2 root root 4,0K márc  21 11:43 .
  # drwx------ 10 root root 4,0K márc  21 11:43 ..
  # -rw-------  1 root root    0 márc  21 11:43 something.txt

sudo rsync --progress -avz "ssh" --rsync-path="sudo rsync" /root/backup_test/ figyi@host_b:/root/backup_test