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I have a slackware machine and I'd like to have a serial console on it. I have a RJ45 console on my hardware. I can now only get output on the console and cannot give any input back to the device. Login prompt appears but I can't type anything into the console. in /etc/inittab:

s1:12345:respawn:/sbin/agetty -L ttyS0 38400 vt100

I have the same problem on ubuntu server 14.04.

  • What are you using to get the console? Another computer? A USB-Serial adapter? (If so, what software? screen?) A vintage VT100? – felixphew Dec 28 '14 at 20:06
  • I'm using Hyperterminal and putty from another computer directly connected via serial port. I don't use USB-serial , my computer have serial port. – sfallahdoost Dec 29 '14 at 4:45
  • I'm not sure about how to solve this in linux, but it is common for FreeBSD systems to be set up to output only to the console. I'll do some more research. – felixphew Dec 29 '14 at 6:18
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I replaced cable and problem solved!

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