Is there any SCP program available for Ubuntu that does not require SFTP on a remote host?

Solution 1:

Update : The problem here is that openwrt does not support linux clients without installing the sftp server.

See https://wiki.openwrt.org/doc/howto/sftp.server

openwrt has no intention of resolving this, see https://trac.cyberduck.io/ticket/4161

So, from the first link, the solution , server side, is to install openssh-sftp-server

opkg update
opkg install openssh-sftp-server

You can then use any number of graphical clients or sshfs - see What is a program similar to WinSCP? and What is a program similar to WinSCP?

Alternate is to use winscp with wine

sudo apt-get install wine
wine winscp.exe

Solution 2:

FAR Manager for Linux recently got support of SCP. Currently it has bugs but you may try.

To install from PPA

sudo add-apt-repository ppa:far2l-team/ppa
sudo apt-get update
sudo apt install far2l
far2l

Then press Alt+F2 (you may need to disable "Run Application" hotkey). Select NetRocks and press Shift+F4 to create a new connection config.