ncftp -u linuxboxaddress
that's how it asks your username and password... if you need to use different port, then add -pXX, where XX is the port number. Notice that those switches are bit different on amitcp version of ncftp than newer ones probably found on your Linux (there it's probably -uUsername -pPassword -Pport).
I think the best ftp clients for Amiga are the DOpusFTP (found in DOpus Magellan) and ATC (AmiTradeCenter). They can do recursive transfers etc. There are lots of other choises too, but older can't do recursive usually... but I guess they're fine for small transfers. ncftp should be fine too.. you can put all files in same dir and transfer with "put *" or "mput *" for example
FTPMount should work too:
"FTPMount supports both anonymous and private ftp sessions. Mounted
private ftp sessions can act as a poor-person's NFS mount."
