A representation of a device that asynchronously transmits and receives serial data.

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57 views

What decides where TTY and boot messages are displayed?

I recently switched from Fedora 21 to Arch Linux, and one thing that bothers me is that Arch does not put boot messages and TTYs' on all available outputs like Fedora does, but only on the primary ...
3
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2answers
35 views

Remove data from the STDIN stream buffer of another TTY session

I encountered a problem the other day while running multiple tty sessions in separate terminal windows. I was running a expensive disk access command and was waiting for it to return. Meanwhile I was ...
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1answer
49 views

Why does GDM start in TTY2 and TTY7

I have Ubuntu 15.04 and GNOME 3.16 installed. This PPAs are enabled: deb http://ppa.launchpad.net/gnome3-team/gnome3-staging/ubuntu vivid main deb http://ppa.launchpad.net/gnome3-team/gnome3/ubuntu ...
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1answer
596 views

How can I make the TTY use the appropriate charset?

Note: forked of this per recommendation here. While I got the X keyboard layout right on my own after I fixed that stupid typo, I still can't set the console charset, key map, font map, or whatever ...
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1answer
21 views

Linking two hardware serial ports

I have two micro-controllers which are connected to my computer(ubuntu 12.04) through serial-USB cables. One of the controllers (ttyUSB0) is programmed such that it sends data serially and another ...
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1answer
68 views

Echoing Backspace Characters in the Terminal

I'm working with picocom running inside gnome-terminal. I have local echo switched on inside picocom using the -e option, and when I backspace I can see that caret moves backwards, however the ...
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6answers
2k views

Enabling Numeric Keypad

I have trouble with the numeric keypad (NumLock keys) being unusable while typing. While I don't think it's GUI specific, this happens both in Gnome and KDE. Sometimes it works in TTY, other times it ...
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2answers
4k views

How to close a tty

I've opened several ttys and I don't know the key combination to use to close a tty. I'm using Arch Linux.
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13 views

Setting custom baud rate on console

Just for aesthetics I would like to have my text on my console be displayed at a lower speed. I've tried using things like screen with custom baud rates of /dev/tty1 but it wouldn't work, input from ...
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1answer
23 views

tty problem: binary mess instead of “text good data”

I am trying to use a GPS over moxa Uport 1110 usb-to-serial device. The driver of UPort was installed OK, and GPS sends NMEA (text) data. However, when I issue command cat /dev/ttyUSB0 my terminal ...
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0answers
236 views

tty blinking cursor not at insertion point

I have an Ubuntu 12.04 system where I, at reboot, login a root. This morning I did the things I had to and thought about running apt-get -y upgrade I started typing this but before pressing Enter I ...
2
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1answer
508 views

How to enable/disable a serial port?

I need to disable and then enable a serial port for testing purposes on a Java program. Since the man page of setserial is stating: "Using UART type none will disable the port.", I use sudo setserial ...
2
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1answer
76 views

Determine the owner of the session of a process

I am trying to implement a way to determine which user is owner of some process's session, in a way that's as cross-platform as possible. In Linux I can trace the process's pty by following the link ...
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4answers
3k views

Get ssh to forward signals

I want to be able to send signals (SIGINT is the most important) through ssh. This command: ssh server "sleep 1000;echo f" > foo will start sleep on server and after 1000 seconds it will put ...
0
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1answer
25 views

What is a UART port

I have a .fex file for Cubietruck. Supposedly, the bluetooth pins are defined in the uart_para2. With the current config, I have uart0 and uart2 enabled, and everything else is disabled. Bluetooth ...
2
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0answers
59 views

cat /dev/ttyS0 Input/output error

I created infrared receiver as in LIRC manual (http://www.lirc.org/receivers.html). And tested it on windows using program called Terminal. When I switched on RTS pin DCD pin was also switched on ...
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1answer
22 views

_Robust_ bluetooth serial port console/tty

I've managed to create and connect to a console via bluetooth, as is described in many Q&A's FAQs Guides etc found via a google search. Briefly, in sudo mode, /usr/sbin/hciconfig hci0 piscan ...
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4answers
7k views

Poor TTY resolution with nVidia driver

The resolution of the TTY1-6 is poor ~ 640×480 Ubuntu 11.10 | Grub2 | nVidia | NVIDIA GT215 Board I went through the process on this site and after the edit the GRUB menu appears in the correct ...
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2answers
76 views

How are long command lines ( > $COLUMNS ) automatically wrapped to a new line?

There are several points where I/O is passed through, some of which (to my knowledge) are the shell, pty, tty, termios, terminal emulator application. In most terminal emulators, long command lines ...
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1answer
685 views

rs232 to usb not working

I also asked this question on AskUbuntu but there nobody comments on it I have a konig rs232 serial to usb adapter (no FTDI chip), but when I try to connect to a cisco switch/router (via Putty, ...
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1answer
1k views

Setting up tty ports on Beaglebone Black with Angstrom linux

I'm using a Beaglebone Black running the Angstrom v2012.12 build that came pre-loaded. I want to be able to connect another device to a serial port via the UART connections on the GPIO headers. The ...
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3answers
2k views

udev re-numbering when creating symlinks

I have USB cellular modem attached to an ALIX 3d2 board running voyage linux (which is based on Debian Squeeze). The modem registers itself as a TTY device, and so by default, udev will create TTY ...
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1answer
715 views

How to open tty or execute some script when the shortcut Ctrl+Alt+F[1-6] doesn't work and X11 is partially frozen but system is still working?

I'm using Ubuntu 10.10 with Gnome on Acer Aspire One netbook. The X11 or just some parts of Gnome like panels and partially windows (details described below) are frozen which doesn't allow to do ...
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1answer
41 views

How do I change which monitor the TTY shows up on?

When I boot, or when I press CtrlAltF*, I am taken to a physical terminal/TTY. The problem is that the TTY shows up on my HDMI monitor, which is actually not even in the same room as me. Is it ...
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2answers
3k views

Call sudo from Jenkins

I have one build machine which has a user abc which is has limited sudo access. When I check out the source code and run my build script, it works fine. The build script contains sudo calls for which ...
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0answers
35 views

echo `“hello terminal” > /dev/terminal` - works for /dev/tty[2-5] but not for /dev/pts/n

I'm trying to get to know the input output systems of unix/linux systems better. Since terminals and devices are implemented to interface as ordinary files, I assumed I could on any desired terminal ...
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76 views

Fedora 21 VT Change Hangs

On Fedora 21, I have LightDM and i3 installed. When I switch to tty2 and do a bit of work then switch back, my laptop hangs. I am using Intel HD Graphics 4600. Thanks UPDATE now it sometimes ...
9
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1answer
713 views

What exactly is scrollback and scrollback buffer?

What are "scrollback" and "scrollback buffer" in programs like bash and screen, and how do they relate to the tty, the programs being run, and stdin/ stdout/ stderr? Here is the only definition of ...
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1answer
29 views

Is the PTTY inside the Kernel or Userspace?

I read, that drivers are a way to expand the Kernels abilities to communicate with hardware devices, since there are so many and will be even more the Kernel has to be expandable. In order to ...
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19 views

Does udev only check for matches on the first remove event?

ACTION=="add|remove",SUBSYSTEM=="tty", ATTRS{idVendor}=="XXXX", ATTRS{idProduct}=="XXXX",SYMLINK+="device", RUN+="/home/alvin/udev/test.sh" This is the command that works on add ...
22
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8answers
83k views

How to connect to a serial port as simple as using SSH?

Is there a way to connect to a serial terminal just as you would do with SSH? There must be a simpler way than tools such as Minicom, like this $ serial /dev/ttyS0 I know I can cat the output ...
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2answers
65 views

Redirect script output to /dev/tty1 and also capture output to file

I want to display text output on the console that is always displayed on a small screen on my Raspberry Pi. The following code works for showing that text output: cd ...
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1answer
38 views

Saving colored output regardless of the source

How can I save colored output to a file regardless of the source when the sources turn coloring off if they detect their stdout isn't a terminal?
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30 views

how to copy files using TTY teminal from one pc to another connected through same home network

In my academic lab my friend copied files from one computer to another that were serially connected using the tty4. How could he have done this if there was no internet and he didn't install any new ...
2
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2answers
135 views

Buffer each line locally on a serial terminal

I use kermit to connect to a device over serial. The device is quite "dumb" and doesn't have any fancy shell. It is really just receiving commands over serial and sending outputs back over serial. ...
4
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2answers
80 views

How to get the real name of the controlling terminal?

How can one get the real name of the controlling terminal (if there is one, else an error) as a pathname? By "real name", I mean not /dev/tty, which cannot be used by other arbitrary processes to ...
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3answers
1k views

Construct a command by putting a string into a tty

I managed to do this echo -n "command" > /dev/tty1 The letters appear, and the cursor moves, but they are "ghosts" - if you hit enter, nothing happens (they are not in stdin). Edit: In the ...
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0answers
34 views

Kernel loglevel and console manipulation

I want to have two console kernel arguments, one /dev/tty2 for screen and one /dev/ttyAM0 for serial debugging. I can achieve that simply with: console=ttyAM0,115200 console=tty2 I want /dev/ttyAM0 ...
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1answer
32 views

Stop interface name iteration?

I have a device that comes up as ttyACM0, however every time it is reset it iterates, so next time it will come up as ttyACM1 etc. Where might this lock be located so that I can remove it? I'd like ...
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1answer
56 views

Detect how much of Unicode my terminal supports, even through screen

Here's the problem: I want to be able to discern if my terminal is capable of decent unicode or not, in order to use some characters or not, much like glances does, that sometimes uses colors and ...
0
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1answer
88 views

Exit /dev/tty after error message

I run this bash function when a button is pressed, it calls my mobile, however when the call ends or I reject the call, it hangs in /dev/tty and does not return to the main program call.sh ...
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3answers
3k views

RHEL:Change Screen Resolution of Virtual Console

I am working on a RHEL 6.3 Workstation. And the monitor is a HD AOC Monitor. Problem I am facing is whenever this machine starts up, it runs with maximum screen resolution. It is a big screen and ...
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1answer
29 views

RHEL Serial TTY

https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Technical_Notes/deployment.html According to this, /etc/inittab has been deprecated. As suggested from this I created a ...
9
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4answers
8k views

How can I hook on to one terminal's output from another terminal?

I need to hook onto output of currently running terminal (tty1) from virtual terminal and capture it (running X server). I'm pretty sure such a thing is possible by simpler means than debugging ...
2
votes
1answer
132 views

How can I make a psf font for the console from a otf one?

I want to use the Inconsolata font in the tty console, but I need to generate a psf font for that. I found that there are two tools that should help me otf2bdf and bdf2psf. But everytime I try to use ...
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0answers
44 views

Serial port locked by random process

I have an issue with trying to open a USB device's serial port with pyserial. It seems that as fast as I connect the device, /dev/ttyACM0 is used by some random process. ModemMana 851 root 8u ...
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2answers
1k views

Bootloader fails to load linux kernel

I upgraded linux kernel from 2.6.32 to 3.0.7 but now bootloader isn't able to load the kernel image. Specifically, boot procedure freezes after: Starting kernel ... Uncompressing Linux... done, ...
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1answer
171 views

Is it possible to open a terminal with specified tty/pty

(I am using Ubuntu.) In my understanding tty is just a kind of port. You input something and it should output something. And a terminal (emulator) is a software handle those input and output. ...
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1answer
44 views

Why does tapping a TTY device only capture every other character?

So, I came across the ttyname function (unistd.h) and had to test it out. #include <unistd.h> #include <stdio.h> int main(void) { printf("%s\n", ttyname(0)); return 0; } On my ...
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73 views

linux + what are the messages bad tty under /var/log/messages file

under /var/log/messages I see the following messages "bad tty" what the meaning of these messages? second is it caused because some application that called - owstd ? as we can see from the log? ...