Zmodem File Transfert
Provided you have correctly configured your Using an Atari ST as Unix/Linux Terminal, you need the following to do Zmodem file transfers.
Configuration
On the Unix side:
install the lrzsz programm
On the ST side:
Make sure that the TAZ terminal knows about your zmodem programm (xyz.ttp for instance) by editing the appropriate entry in the "Paths" config menu.
Receiving a file on the ST
Once you're logged in your unix system from the ST Terminal emulator, typing {{{ sz /home/manu/myfiles/* }}} will send all the files of the sz /home/manu/myfiles/ directory.
Type now Alt-R inside TAZ, this will activate the Zmodem program on the ST, and it will start writing the files on your floppy or megadrive.
Sending a file from the ST
Once you're logged in your unix system from the ST Terminal emulator, typing {{{ rz }}} will wait for an incoming file from the st, and write it inside the current working directory.
Type now Alt-S inside TAZ, this will activate the Zmodem program on the ST, and after asking which files to send, the transfer will start.
Remember that if you want to use a transfer speed of 19200 bits/s you need to use the HSMODEM utility on the ST, which is is an improved serial port driver. Without it, your files will probably get corrupted during the transfer.