recover files in linux using xfs_undelete and dd

yum install expect tcl tcllib

dd if=/dev/sda | ssh USERNAME@IP_ADDR dd of=sda.iso

xfs_undelete sda.iso

More :

https://github.com/ianka/xfs_undelete
https://unix.stackexchange.com/questions/132797/how-to-dd-a-remote-disk-using-ssh-on-local-machine-and-save-to-a-local-disk