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

learn more… | top users | synonyms

0
votes
0answers
11 views

Where can I find more information about /dev/pts/*, /dev/ptmx, tty and pseudo terminals [duplicate]

As in the title I what to know more about terminals and pseudo terminals, how they are created and how to create my own terminal emulator. man for pts and ptsname show some hints, but I want to learn ...
1
vote
1answer
135 views

Block TTY echo to display

I have a minimal Ubuntu as a Linux server. It starts many scripts on startup that is ok but I want to disable tty1 to echo everything to display When I start this server a login promt is presented on ...
0
votes
1answer
381 views

How can I print out the current keybindings in Linux/Debian? [closed]

How can I print out the current keybindings in Linux/Debian ? I tried xmodmap -pp and got the response: xmodmap: unable to open display ''
0
votes
0answers
115 views

Which getty should I use for /dev/tty1 - tty6 text consoles in linux, agetty or something other

I'm configuring LFS linux and I want to select right "getty" for /etc/inittab to handle text consoles /dev/tty1 - /dev/tty6 (the text consoles handled by linux kernel, with output on first display). ...
1
vote
0answers
45 views

Can slattach control a serial WiFi device?

I have a Wi-Fi device which is driven by AT commands over a USB-Serial connection. I am able to successfully make a serial connection to the device and set the SSID, PSK, obtain an IP address, and do ...
1
vote
3answers
9k views

sudo: no tty present and no askpass program specified

I have a perl script that I fork from another script that I launch from a web browser via mod_perl. The forked script (which ends up running as apache) needs to sudo service X stop as part of a ...
2
votes
2answers
622 views

Changing TTY font to a non-default font

I found two ways to change the TTY font: dpkg-reconfigure console-setup editing /etc/default/console-setup Either way I'm limited to the fonts in /usr/share/consolefonts (I'm using Debian). How ...
3
votes
2answers
505 views

How to redirect tty1 to an X11 (KDE) Konsole shell?

I would like to see what is going on at tty1 - the console I was booting from - while I am now on tty7 running X11 with KDE4, without switching back to tty1 (Ctrl+Alt+F1). I would like to see it ...
5
votes
2answers
895 views

How can I launch applications from 2 ttys on launch?

I've currently got 2 ttys logging in automatically, but I need to launch a node script from one and a C program from another as soon as the device loads. The device is a Raspberry Pi running ...
1
vote
1answer
425 views

Connect to pseudoterminal (same user) from lost session [duplicate]

I was running several large processes at once, and my PC froze (I suspect due to heat, its a laptop, and the fan was at maximum for several minutes just prior to locking up). The mouse cursor moved, ...
2
votes
1answer
67 views

Is monitoring rsync with a pts device possible?

I have a rsync backup script, and I was wondering about methods of monitoring it as it runs. I could have it save a log and use watch and tail, but I had a more elegant solution in mind that might be ...
5
votes
1answer
267 views

Linux VT Emacs in tmux, breaks color and cursor

TERM is set to screen. I tried with screen-256color, but then the colors went really nuts. I also tried xterm, linux, and some others (that I could think of, not really thinking) but screen is the ...
2
votes
1answer
418 views

How to connect to virtual /dev/ttyX from same machines pts terminal?

I want to get output/input from /dev/ttyX console (normally accessible directly using keys ctrl+alt+FNr, where Nr is number of /dev/ttyNr: ctrl+alt+f4 access /dev/tty4). I want to view and control ...
1
vote
2answers
112 views

Is there a way to add some info about time/date to TTY prompt?

If you have a graphical display manager, you can notice date and time there, but I haven't seen such a thing when it comes to TTY. If I want to check the current time (or date) I have to log in. It's ...
1
vote
1answer
276 views

Track down process that has notty

I have a Linux server (Red Hat 2.6 kernel) which had a spike in load due to an Rsync process which seems to have forked many times, but the process was run by rsyncuser@notty I didnt see any cron job ...
2
votes
2answers
1k views

How to change the default TTY after boot?

Normally when system starts you have all output printed on the TTY1, and that's ok, but I start X-server via startx and achieve this by the following lines in the ~/.profile file : if [[ $(tty) = ...
2
votes
0answers
217 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
votes
1answer
1k views

How can I pipe commands to any terminal?

I often use more than one terminal (or terminal emulator) at a time; and while in X I can copy-paste commands, besides not being very practical, it obviously does not work on the real TTY. The first ...
0
votes
1answer
377 views

Linux TTY Colours

I've had this issue for a little while now on a few machines, but never thought to ask anyone. Upon installing a new laptop the other day, and using the virtual terminal for a bit, I noticed that ...
3
votes
2answers
109 views

Why does the Linux virtual terminal support only 16 colors, by default?

Why does the Linux virtual terminal support only 16 colors, by default? Is there a particular reason for this?
2
votes
1answer
818 views

Re-ordering serial ports on a multiport card

I have a Red Hat Enterprise 6.2 machine with two on-board serial ports and a PCIe card with 8 additional serial ports (16C950 UARTs, 16C550 compliant). I've added the kernel option 8250.nr_uarts=10 so ...
3
votes
3answers
1k views

X11 forwarding through SSH

I have been playing around with X11 forwarding the past few hours and so far I've managed to forward my desktop pc's X Server to my laptop, using X11VNC as server and X2VNC as client. X2VNC uses ...
1
vote
0answers
347 views

Only met by a tty “login” prompt when booting Mint

I've installed Linux Mint 11 Katya (dual-booting with Win7) on my PC. After some problems with booting, I decided to use NeoGrub to add a Grub-based bootloader, configurable from within Windows, to ...
6
votes
2answers
1k views

Detect if running in a virtual terminal?

I'd like to autologin to tty1 on login and then use vlock to lock it. How can I detect from Bash if the current terminal is a console virtual terminal (e.g. tty1), so that I can put the vlock line ...
2
votes
2answers
2k views

how to re-enable input on a serial console

I have an old router which runs Linux and I'd like to have a serial console on. This used to work fine, but after a firmware update, I can now only get output on the console and cannot give any input ...
3
votes
1answer
201 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 ...
3
votes
0answers
631 views

Plymouth splash not working and causing VT problems

Since I tried installing Plymouth (boot splash), I'm facing two problems : It's not working My Virtual Terminals (tt1 - 6) aren't working anymore Here what I did : Added plymouth hook (after ...
2
votes
2answers
234 views

Weird escape sequence

I need help identifying what this escape sequences represents. I see this sequence is autogenerating on my server's console, but I'm not sure what is the reason for that. Escape sequence: ^[[[D I've ...
2
votes
0answers
818 views

Trying to understand how TTYs and PTYs work in CentOS 6.5? [duplicate]

I started to dig into the whole Linux pty and tty hell. I'm trying to understand how it works here in Linux so I was reading quite a lot of articles that covered this topic. So far I know: TTYs ...
0
votes
1answer
101 views

Virtual TTY jumps to the next on launching from the Openbox menu

When I launch a terminal from my Openbox menu my virtual terminal TTY jumps to the next CtrlAltF12 slot. It seems that this problem appeared after I wanted some more than 7 TTYs and added some to ...
14
votes
2answers
762 views

Can the empty spaces/background in a terminal be replaced with a random(but pretty) pattern of ASCII characters?

Context and Question There are many ways to colorize the terminal and shell environment. The output of individual commands, such as ls and grep, can also be colorized. Not directly related but ...
3
votes
1answer
313 views

How to switch tty with a script / cronjob

Is it possible to switch the current tty/vt with the help of a bash script or a cronjob? I only know the physical keyboard input "Ctrl-Alt-Fx". I would like to show two virtual desktops at different ...
12
votes
2answers
2k 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 ...
3
votes
1answer
306 views

What is the maximum allowed number of TTY, is it defined anywhere in kernel headers?

What's the maximum allowed number of TTYs? I found pty.max, but is there anything similar for TTYs? Or is it defined as a fixed value in kernel headers, I couldn't find that
6
votes
1answer
3k views

Read what is written to /dev/tty*

How can I read what is written to /dev/tty*(* = 0 - number of tty)? I tried sudo tail -f /dev/tty1 on one terminal(X) and then sudo cp .emacs /dev/tty1 from another. X didn't show the the content of ...
3
votes
1answer
2k views

Change the number of generated /dev/tty devices

I'm building an embedded Linux system, based on Gentoo. Using udev, all tty devices are probed with a PROGRAM stanza to determine if they are a modem. Right now the system boots up with 64 /dev/tty*. ...
4
votes
1answer
241 views

GNU Screen weird characters on click

I have a small problem in GNU screen. A GNU screen session runs on my RaspberryPi. Now sometimes, when I join it, if I click in the terminal (I'm using terminator on Fedora) I see weird characters ...
2
votes
2answers
894 views

How can I replace a tty using getty with qingy on ubuntu 12.04 or later?

Qingy is a getty replacement. I'd like to use it for a tty terminal on Linux Mint 15 (in hopes of getting tmux to get proper 256 colors in tty which fails with fbterm) which means replacing getty. ...
32
votes
1answer
916 views

What happens when Ctrl + Alt + F<Num> is pressed?

I am looking for an explanation of what happens in Linux when this key combination is pressed to change the current terminal. In particular, what software component intercepts this key combination and ...
2
votes
3answers
1k views

Pasting binary data into a Unicode terminal

I need to be able to paste binary data into a terminal. For some reason, every byte outside the ASCII range (0x80-0xff) is pasted as the same three byte sequence 0xef 0xbf 0xbd. For example: $ echo ...
1
vote
1answer
89 views

Capture textual snapshot of pseudo terminal

My question is related to Keyboard and Console, but I want to do it for an arbitrary pseudo terminal, and not just the built-in Linux ones. Also, I'm not interested in a stream, I just want the ...
3
votes
4answers
367 views

How do you find what keys the “erase” and “line-kill” characters are in Ubuntu?

I'm new to Unix and have bought today a copy of "The Unix Programming Environment". I'm trying out the stuff from the book. But some of them are not working as expected like : To kill a line and ...
2
votes
1answer
377 views

accessing stdin/stdout of a process started in another tty

I logged in to my linux physically(say tty1) and started a process that watches stdin for commands and has some stdout-put. How can I access/use this process from a SSH session?
5
votes
1answer
1k 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.
3
votes
0answers
119 views

No Login on created on tty2 to 6

On my Debian Linux no Login is possible on terminals 2 to 6. Login on 1 works fine, xorg-session with XDM and awesome wm works, too. The Error Message shown on these 5 screens is: ...
0
votes
1answer
178 views

Making a tty9 on a openvz VE

I am in a virtual environment. I am installing Asterisk and freepbx. They use this script amportal and it has a requirement to check for tty9 there is alot of mention on folks running this in a VE ...
4
votes
1answer
164 views

Use case of providing file-like API to terminal/console

It was explained in this Stack Overflow thread that each logical terminal has a "pseudo-terminal", and that writing to one: $ cat some-file.txt > /dev/ttys002 will cause the data to appear in ...
2
votes
1answer
115 views

How to restore from a scrambled screen?

My screen is scrambled while reading some unexpected chars, It happens in a local tty, so logging out won't help. Any ideas? Hopefully I don't have to reboot
2
votes
1answer
185 views

Why does `last` show '{' and '|' in the TTY field?

We recently set up a new FreeBSD 7.2 machine on March 11. When looking at last, we noticed some funny characters for the TTY field. What do these characters mean? Note that at this time, the ...
2
votes
2answers
7k views

How to set default console keyboard layout in Arch Linux?

Whenever I reboot my computer I have to set the keyboard layout in a console again with loadkeys. Is there a way to change the default keyboard layout that is loaded everytime the computer boots?