The need for a password on login is independent of how you access the computer: the serial port, Ethernet, WiFi, or a direct connection with HDMI and USB keyboard; it is all the same. The need for a login is controlled by the /etc/passwd file or, in modern systems, from the shadow password file. And it varies by username. If there is an encrypted password in the field then that user needs to enter a password. is the fild is is blank then no password is needed (blank means a zero-length string)
What is the big picture? Is this a LCNC machine or a 3D Printer controller? Debian-based Linux is the same on both. I wonder why you need the serial power when SSH over Ethernet of WiFi should work. If you have messed something up and networking is no longer working, the usual fix is to boot from a portable USB device— the disk, SSD or SD card— fix the issue, and then reboot from the main internal storage. Many people can’t know how to fix the system and end up doing a reinstall. OK serial login will get you access when the networking is broken, but whether a password is needed is determined by files in /etc. > On Sep 25, 2026, at 10:30 AM, maurice e heskett <[email protected]> wrote: > > On 9/25/26 12:12, Chris Albertson wrote: >> You need to cross over the wires. The labels Rx or Tx are always from >> the connector's point of view. > got that Chris, but even that connection needs a login/passwd. I don't recall > having to do that with a similar hookup to my last BIG (meter cubed) 3d > printer. So now I need a card reader. >> >>> On Sep 25, 2026, at 8:19 AM, maurice e heskett <[email protected]> wrote: >>> >>> Hi all; >>> >>> When hooking up the rxd/txd from a 3 wire test cable, should I swap rx to >>> tx & vice versa, response is silent when direct. >> >> >> _______________________________________________ >> Emc-users mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/emc-users > > > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
