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

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Systemd hangs before TTY during boot in archlinux

systemd of my archlinux hangs since this morning without any error message and before TTY. So, I cannot use Ctrl+Alt+F1. The last thing I see is Reached Target Bluetooth. But everything looks fine ...
1
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1answer
124 views

MacOS terminal ssh input buffer size

I am trying to cut-paste some switch config over an ssh session from my mac. It seems to start mangling it after a set buffer size. Surely cut-paste buffer is large enough, since I can cut-paste just ...
3
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1answer
374 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 ...
3
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2answers
351 views

What are TTYs >12 used for?

Related to TTY numbers, it looks like there are 64 TTYs (find /dev -name 'tty[0-9]*' | cut -c 9- | sort -n | tail -n 1 and documentation). tty0 is the current virtual console, Ctrl+Meta+F1 reports ...
2
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3answers
314 views

/dev/console points to tty0?

I've been trying to understand the /dev/console device, but there are a few things I'm not clear on: What is the purpose of this device? From what I can gather it's just a place for the kernel to ...
0
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1answer
188 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 ...
0
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1answer
142 views

How are virtual consoles related to traditional computer terminals?

This is extracted (with some rewording) from Computer terminal and virtual console, which has been closed with a hatnote linking to What is the exact difference between a 'terminal', a ...
2
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1answer
182 views

How can I live-change the TTY rows and columns?

This is a question about Linux running on a Compulab device named Utilite Pro, but I think it is worth the price to ask this question here to get it solved for any platform (if possible). I ...
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4answers
5k views

What are the responsibilities of each Pseudo-Terminal (PTY) component (software, master side, slave side)?

I am trying to figure out how a tty works1 (the work-flow and responsibilities of each elements). I have read several interesting articles about it, but there are still some blurry areas. This is ...
4
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2answers
3k views

256 color in Linux console

I have in my .bashrc export TERM=xterm-256color but this cause blinking all colored text (ls --color, in vim etc.) in a Linux console (Ctrl+Alt+F1). So is there any possibility to recognize in ...
0
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1answer
145 views

Sudo Apache, with command line ? (not visudo)

I have visudo-edited /etc/sudoers this way: User_Alias APACHE = www-data Cmnd_Alias FIREWALL = /sbin/iptables, /sbin/ifconfig, /sbin/route APACHE ALL = (ALL) NOPASSWD: FIREWALL (To allow php ...
4
votes
1answer
113 views

Why do the terminal attributes look different from outside the terminal?

If I open up a terminal (xfce4-terminal 0.6.3, but I doubt it matters) and I look at what terminal attributes are set (BASH is running in the terminal), $ stty -a speed 38400 baud; rows 24; columns ...
4
votes
5answers
1k views

Multiple terminals at once without an X server

There is a way to visualize multiple terminals at the same time without running a Xorg session ? I have a really low profile machine that could be great for some basic stuff but has an horrible ...
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0answers
38 views

Zenity, how to manage cryptsetup prompt?

With Zenity, I display a progressBar and install/config many stuff on a Linux Mint (Debian) computer. I had to avoid any prompt. But one step prompts Enter a passphrase:, this is cryptsetup ...
1
vote
2answers
124 views

Execute command inside another command

I'm trying to record my tmux session. I've got an alias record-session which executes command from ttygif ttyrec ~/ttygif/files/last-session. As far as I understand ttygif starts new terminal instance ...
0
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1answer
77 views

Ctrl+Alt+F2 doesn't switch TTYs on laptop

I'm unable to switch ttys using Ctrl+Alt+F2; nothing happens. Is there some other way to switch? Is there a problem with the keymapping? And how do I fix that? I'm on a US Lenovo X1 Carbon if that ...
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0answers
67 views

U-Boot: Changing TTY columns and rows for virtual consoles

Having installed GRUB as boot manager allows the operating system (Linux) to boot on specific video mode so the TTY virtual consoles change its columns and rows (width and height). For example, ...
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2answers
50k views

Can I change the font of terminal?

I have a Unix-like OS installed without desktop. Is it possible to change the font of the terminal?
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1answer
831 views

Sending serial commands with echo vs screen session

I have a small LED matrix controlled by a display driver that accepts serial commands to update the display. I'm successfully controlling it via node with the node serial package, however I'd like to ...
17
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5answers
5k 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 ...
5
votes
4answers
12k 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 ...
5
votes
2answers
519 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?
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2answers
3k 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.
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1answer
248 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?
3
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1answer
245 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. ...
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2answers
1k 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 ...
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0answers
120 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
3k 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 ...
8
votes
2answers
4k 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. ...
0
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1answer
210 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
2k 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
991 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
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1answer
238 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 ...
18
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2answers
5k 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
346 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
261 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
492 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 ...
1
vote
1answer
169 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 ...
14
votes
7answers
15k 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.
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4answers
454 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 ...
3
votes
3answers
413 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
1answer
253 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 ...
1
vote
1answer
80 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", ...
1
vote
1answer
214 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 ...
4
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0answers
221 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
288 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
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0answers
624 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
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2answers
210 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
394 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
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1answer
163 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 ...