IP Networking

I have two PCs with Ubuntu 10.4 and DOS 5.0, which are connected with a 9 pins serial cable.
I need to copy some files from the Linux box to the DOS box.

I tried UUCP but it's too difficult and i didn't found a working client for DOS.

Can you help me? Thanks for any reply!

ftp doesn't work ?

install winscp on your DOS machine, and customise an entry to connect to the unix machine from which you want to get the file...

Check with your network admin if there are limitations regarding the machine who should initiate the connection

There isn't any LAN. My PCs are connected by a serial cable.

so you can connect them together : this will be a Local Area Network
configure them in the same range of IP or fix their network config so that they can ping eachother

make sure the windows firewall doesn't block youy connection in a way or another ?

Oh my good!

Ok, first of all I would strongly suggest any other form of transfer than serial. But it depends on how much You want to transfer, in which direction or whether learning about serial communication is the main objective of Your undertaking, rather than just copying some bytes.

And we need to know more. Does Your DOS-machine have floppy, CD, USB, (I assume it doesn't have a network card?), is it very old , does it have any Windows 3.* on top of it, does it have to keep running DOS5, will You use it as a (serial) terminal to the Linux-machine, have You as of now had any working contact over serial... and so on.

Because this will let us know more about what options are available.

Best regards,
Lakris

First of all, thank You for your help Lakris!

I absolutely need the direct serial transfer: the pc is really old and it doesn't have usb, cdrom, network card, nor ethernet port. Only a floppy drive. It have got Windoze 3.11 and DOS 5.0. I cannot put linux on it! Too old (486, i think)

And yes, I use it as a serial terminal to the Linux Machine. I'm using KERMIT to do that.

To ctsgnb: No, this isn't a LAN, and there is no network.

Why are you not using Kermit to transfer the file then? Kermit has excellent builtin file transfer capability. In fact file transfer was the original purpose of Kermit; other capabilities like terminal emulation came later.