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Wow, that has to be the first time this century that I've heard rx referred to as a "great little utility"! :-) Yet we can still dust the cobwebs off those old commands. XMODEM: rx for receiving, sx for sending. YMODEM: rb for receiving, sb for sending. ZMODEM: rz for reveiving, sz for sending.


I have tried with another serial port (i.e. /dev/ttyS2). So I assume this effect is due to hardware error. If I connect the cable to the original serial port the communication with the external device is KO again :S


It's worth mentioning that many (most?) servers still provide serial access (ttyS0). I need to connect over a Serial-over-LAN connection through iLO/iDRAC almost daily. As @Patrick noted, I connect to virtual machines over serial port as well when reconfiguring networking, etc.


The rule syntax above may work on some distributions, but did not work on mine (Raspbian). Since I never found a single document that explains all the ins and outs, I wrote my own, to be found here. This is what it boils down to. 1. find out what's on ttyUSB: dmesg | grep ttyUSB 2. list all attributes of the device and pick out a unique identifier set, ...

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