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

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12
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5answers
4k 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 ...
3
votes
4answers
5k views

Sending message from one terminal user to another user

I have a user of name x in tty1 and y in tty2. Now x wants to write some message to y and vice-versa. Now I typed in tty1 terminal write y tty2 It is showing write:write:you have write permission ...
1
vote
0answers
35 views

How to use tty allocation to run GPG through SSH?

I am trying to encrypt and sign a local file using a distant GPG installation via SSH: pv file | ssh -tt [ssh server] gpg -se -r [receipt key] > file.gpg Using the double t option removes the ...
0
votes
1answer
763 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, ...
5
votes
2answers
100 views

Name of the font used in Linux Console (TTY)

What is the name of the font that is used in Linux Console TTY 1-6?
5
votes
2answers
2k views

Return to X session after Ctrl+Alt+F1

What is the command to return to the graphical desktop after entering the terminal mode with Ctrl+Alt+F1? I need it for operating my Raspbian.
1
vote
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 ...
5
votes
2answers
73 views

Why does password prompt lag slightly after typing the username in tty?

I have a this kind of behavior & I don't know how to fix it or even how to search a fix for it since I don't know how would I even call it. Here's what's happening: The first time I boot, when I ...
1
vote
0answers
18 views

How do I use the “screen” command if I don't know what the ps or tty the program came from?

I am making a python program that launches on bootup, and I would like it so that I can interact with that program via the "screen" command, so that if I need to talk to the progarm via a different ...
1
vote
1answer
32 views

TTY/Console Wallpaper Arch Linux

How can I set a wallpaper for a TTY/console (also during boot) on Arch Linux like done on OpenSUSE? I think a Kernel recompile is needed?
0
votes
0answers
31 views

debian jessie: how to automount from tty1?

[Note: before you mark this a duplicate: There are several similar-looking questions in this stackexchange (which did not show before creating this question--one seems to get much better matches in ...
1
vote
1answer
54 views

Mocking a pseudo tty (pts)

We would like to run some curses based apps in background. These apps use curses and get the current tty port name to be used internally to map log files and others context-terminal associations. ...
0
votes
2answers
53 views

Black screen when I move from X session to tty session

I've the ATI proprietary drivers. When I power on the computer and I do the login all works well, but when I run xorg I can't change tty or exit from xorg because if I try I see only a black screen ...
1
vote
0answers
51 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 ...
5
votes
2answers
2k views

Best way to set serial port speeds on boot?

I've got instruments hooked up to /dev/ttyS1 through ttyS9 on a machine running Debian Wheezy. The various instruments communicate at various speeds. Is there a better way to set the baud rates than ...
4
votes
2answers
393 views

How do I permanently change the console TTY font type so it holds after reboot?

I'm running Ubuntu 15.04 64-bit Desktop Edition (A Debian based Linux). I used sudo dpkg-reconfigure console-setup from the command line to change the default console font type to Terminus. ...
4
votes
1answer
850 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 ...
2
votes
1answer
706 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 ...
0
votes
1answer
35 views

Difference between tty and ttyS and pts and vcsa? [closed]

I can't understand what is difference among tty, ttyS, pts and vcsa? Are they same? when we connect a serial cable to a server which hosts unix-like operating system, which ones of these type of ...
2
votes
2answers
804 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
votes
2answers
180 views

reading /dev/ttyUSB0

I'm trying to see the output of an accelerometer with Ubuntu (15.04), kernel 3.19. The UART driver is cp210x.ko, and the chip of the accelerometer is MPU6050w. So, when I plug the device, I have this: ...
2
votes
1answer
171 views

Block TTY echo to display

I have a minimal Ubuntu as a Linux server. It starts many scripts on startup. That is okay, but I want to disable tty1 to echo everything to display. When I start this server, a login prompt is ...
14
votes
2answers
3k views

How does a Linux terminal work?

If you fire up a terminal and call an executable (assuming one thats line oriented for simplicity) you get a reply to the command from the executable. How does this get printed to you (the user) does ...
2
votes
1answer
230 views

FreeBSD gettytab configuration

I have a serial port on my system which is named cuau3 under FreeBSD. I want to change the properties of this port, I can change the device's speed using /etc/ttys and /etc/gettytab files, but I can't ...
2
votes
0answers
54 views

Where EOF character is processed when it sent over telnet connection

Lets suppose I am connecting to telnet server, where bash is running. I am executing comand "cat > /tmp/qqq"; typing some contents of a file and finally sending 0x0a 0x04 which meant EOF. The ...
1
vote
1answer
66 views

ttyUSB0 serial port crashes and locks, requires computer reset

I posted this question on stack overflow already but after looking up similar questions I realized this is a much better place for it (and it only got 8 views after 10 hours on a Sunday). If necessary ...
6
votes
3answers
4k views

Why are my virtual consoles completely blank?

When I go from my graphical session to a virtual console by Ctrl + Alt + F i (with i in 1 - 7 and 9-12) I see a completely black screen. Only on F8 I see the GUI. Not even a blinking coursor on the ...
1
vote
1answer
51 views

TTY control characters sent to stdin of sh doesn't work

I tried to develop a remote app that launches sh and resends an incoming data there, and found that some special sequences don't work. So, for testing purposes, I launched on my desktop sh, then ...
13
votes
7answers
11k views

How to stop cursor from blinking

How do I make the cursor stop blinking when in a TTY? (or anywhere else). BONUS Points for one universal setting that stops the cursor blinking almost everywhere.
6
votes
7answers
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 ...
0
votes
4answers
103 views

“emacs: standard input is not a tty”

I followed http://unix.stackexchange.com/a/43460/674: after $ locate -i linux | less I type g|$emacs - in less, but nothing is opened in Emacs, and the terminals says: emacs: standard input is not ...
538
votes
3answers
111k views

What is the exact difference between a 'terminal', a 'shell', a 'tty' and a 'console'?

I think these terms almost refer to the same thing, when used loosely: terminal shell tty console What exactly does each of these terms refer to?
3
votes
3answers
264 views

USB device to be detected at the “same” /dev point always?

In Linux (actually I'm with CentOS v6.5), whenever I plug in my USB Terminal/Character Device (some kind of USB Adapter) for the first time (after booted), it is detected at: /dev/ttyUSB0 But ...
0
votes
0answers
92 views

One single /dev/ttyACM for multiple composite devices (USB-Serial) connected to a hub

When I connect multiple composite devices to a USB hub, and then connect the hub to my laptop(running Fedora 21), I can see only one /dev/ttyACM* file. When I connect these devices directly into ...
0
votes
1answer
117 views

systemd with 10 ttys and Desktop on Ctrl+Alt+F5

I am running systemd on ArchLinux. I have read various posts of doing this but it seems impossible (i.e. I am incompetent in implementing this:)) ). I want to disable the on-demand tty spawning of ...
2
votes
3answers
4k views

Endless data loop from dev/ttyUSB while sending AT commands

I have problem sending AT commands to my USB modem. At first I tried php-serial class, but when i was reading data, I got endless loop with strange data. Then I tried to debug problem and opened putty ...
1
vote
1answer
35 views

setpgrp causes tty gone

When using setpgrp vi (and other tty programs) work completely different than if setpgrp is not used. Example: perl -MIPC::Open3 -e '$pid= open3("<&STDIN", ">&STDOUT", ...
0
votes
0answers
22 views

interceptty error message

I want to listen to a certain device on my linux system. therefore I am using interceptty. When I call: mv ttyO0 ttyO0-orig and then ./interceptty -o ttyO0.out /dev/ttyO0-orig /dev/ttyO0 & I ...
1
vote
1answer
110 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
votes
0answers
79 views

Start application using xinit on different tty

I'm using Fedora 21, trying the following: On tty1 is running KDE, just as normal. But to speed up my games/avoid them changing something like gamma, I want to run them on a differnt tty, starting a ...
3
votes
1answer
84 views

Using named pipes to send keypresses to an interactive program

I have a program, mpg123, which has an interactive mode that allows keyboard commands from stdin to do useful things such as control volume. I am trying to start up mpg123 so that it reads commands ...
2
votes
0answers
150 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 ...
3
votes
2answers
66 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 ...
0
votes
1answer
143 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 ...
0
votes
1answer
55 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 ...
1
vote
1answer
93 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 ...
7
votes
2answers
5k 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.
1
vote
0answers
39 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 ...
1
vote
1answer
50 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 ...
2
votes
0answers
273 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 ...