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

learn more… | top users | synonyms

2
votes
1answer
1k views

Getting no tty present and no askpass program specified when using git over ssh

I'm trying to push a git commit from my laptop to my server but keep getting the following error message: remote: sudo: no tty present and no askpass program specified To ...
2
votes
1answer
292 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 ...
1
vote
1answer
177 views

What are the different virtual TTY numbers used for?

It seems by default (at least on Ubuntu, but I think I saw the same on other distros) there are virtual TTYs 1-6 for text login, 7 for GUI login, and 8 upwards are unused or at least non-interactive ...
2
votes
1answer
270 views

How to rebind XON/XOFF keys?

I put stty -ixon -ixoff in my .bashrc so I can use Control+S to search the bash history forward (here there is a text about it). However, I sometimes used Control+S to really send the XOFF signal to ...
1
vote
2answers
845 views

Invoke a command/script disconnected from the controlling terminal?

I'm investigating the behaviour of a script that is normally run as an automated process (e.g. cron, Jenkins). The script can (eventually) invoke commands that behave differently (seeking user input) ...
0
votes
1answer
669 views

How to change keyboard speed in the Linux console? [duplicate]

When I press Ctrl + Alt + F1 the desktop environment disappears and a terminal window appears. Pressing Ctrl + Alt + F7 brings me back to DE. This terminal is useful when the DE hangs for some reason ...
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.
15
votes
1answer
20k views

Is it okay to disable requiretty?

I'm trying to set up a deploy script using Capistrano At a step cap deploy:setup script is connecting to my server and trying to run commands that create directories. Then I see an error: msudo: ...
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
577 views

Start IceWM from the command line *and* get sound working?

So, I hate window managers. I hate them all. My current distribution is Ubuntu 12.04. Here is my /etc/init/lightdm.conf: # LightDM - light Display Manager # # The display manager service manages ...
1
vote
1answer
431 views

Can I use xterm to read/write to a pts without spawning another process (e.g a shell)?

I have a process which reads and writes to a pseudo terminal. I would like to open xterm and have it open a pseudo terminal and leave it open so I can communicate with this process without creating ...
32
votes
1answer
1k 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 ...
7
votes
3answers
1k views

Create Null Modem Pair linux

I am looking to create virtual serial ports on Debian 6 squeeze. Basic requirements are: be able to connect as if port was a real serial port( IE be able to set baud, stop bits etc) com port pairs ...
2
votes
0answers
150 views

Controlling ppp's chat buffering

I looked at the ppp chat source and it uses putchar to write to the device. When PPP is run over a line discipline like n_gsm, which multiplexes a tty via the GSM 07.10 protocol, a lot of extra data ...
2
votes
3answers
801 views

What's the difference between these ways of accessing the shell?

From what I know it seems that there are many ways to access the shell on Linux. So far the methods I know are: To use a program such as Terminal or Konsole To use the shortcuts CTRL + ALT + F1-6 To ...
62
votes
2answers
47k views

Linux: Difference between /dev/console , /dev/tty and /dev/tty0

On a Linux system, what is the difference between /dev/console , /dev/tty and /dev/tty0 ? What is their respective use? How do they compare?
6
votes
2answers
2k views

Why are there so many virtual terminal devices?

I've been reading the Advanced Linux Programming book and it mentions about virtual terminals which, if I understood it correctly, it is a Linux-specific feature (not in Unix) to allow multiple login ...
2
votes
1answer
203 views

Does each user get his/her own tty(s)?

I put a simple echo command in a CLI tty by user1 expecting it to reach user2 who is logged in a separate tty. echo "Hello, world!" >> /dev/tty5 I expected user2 to get the echo message but ...
8
votes
1answer
414 views

What should interactive shells do in orphaned process groups?

(Re-posting in unix per the suggestion in http://stackoverflow.com/questions/13718394/what-should-interactive-shells-do-in-orphaned-process-groups) The short question is, what should a shell do if it ...
5
votes
2answers
1k 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 ...
12
votes
1answer
1k views

Screenshot of X from tty

Using Xvfb I can launch an application and take a screenshot. What I'm wondering about is how to capture from an existing (dormant) X session. Say from tty or over ssh. From what I understand ...
3
votes
2answers
496 views

Hash symbol on a teletype

My issue is a bit unusual, so I want to provide a short background. I was looking at old winners of the International Obfucated C Code Contest, and came across an entry written for the PDP-11 (the ...
3
votes
1answer
523 views

Preserve scroll on Linux console switch [duplicate]

Possible Duplicate: How do I ensure that a terminal remains scrollable? I've configured really sweet keystrokes for switching between, and scrolling in, a tty (the Linux console). But, as ...
3
votes
0answers
439 views

stty before login

We've got some HP-UX Integrity VMs that are difficult to log in to at the console because the KILL character is set to @, which also happens to be a component of some passwords. Now I know we can get ...
3
votes
1answer
1k views

Ctrl-Alt-F1 not working from X

I have a system running Debian 5.0 that doesn't respond to Ctrl-Alt-F# (1-6) Check if Ctrl, Alt, F1 and F2 are intercepted correctly... $ DISPLAY=:0 xwininfo xwininfo: Please select the window ...
3
votes
2answers
370 views

why slight delay after failed login in tty [duplicate]

Possible Duplicate: Why a wrong password gives a big delay Whenever I mistype my password when logging in in a tty, I have noticed that I have to wait for a second before I'm able to log in ...
1
vote
1answer
518 views

Need help on setting up tty autologin on FreeBSD

I was trying to setup tty auto login for FreeBSD, I copied the P|Pc|Pc part and made a change: Pcal console:\ :al=root:ht:np:sp#9600 And modify the tty for ttyv0: ttyv0 "/usr/libexec/getty Pcal" ...
2
votes
1answer
250 views

Security drawbacks of disabling tty password check

I found that, in /etc/inittab, this modification (-a username) for the user u disables the login/password check for all tty:s: 1:2345:respawn:/sbin/getty -a u 38400 tty1 2:23:respawn:/sbin/getty -a u ...
1
vote
1answer
260 views

How to disable messages in unix if mesg and chgrp not allowed?

This is one of my questions for my exam .. We are not supposed to use mesg y/n for this but we should effectively avoid mesgs along with the problem of not being able to change groups.
1
vote
1answer
400 views

Graphics on boot like the backtrack linux or the Gentoo live DVD after you press alt+F1 on boot

Would like to find a good tutorial on how to make a boot splash similar to the one on backtrack {3,4,5}. It has all of the terminal text that you would see on a normal boot up but it has a nice ...
6
votes
1answer
3k views

Cannot switch to TTYs or back

I just upgraded to Mint 13 - KDE x64 I am unable to switch to ttys by using the CtrlAltF1 .. F6 keys. The gettys are running and I can switch to the terminals with the sudo chvt 1 command. I have ...
1
vote
2answers
633 views

is it possible to run job in foreground after user logout

I have some job to run which need be attached to terminal (or in foreground). The job is run in remote servers, and needs keep running after the users logout. I am aware of vnc server, however, I want ...
8
votes
2answers
33k 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?
1
vote
1answer
244 views

Configuration for either detecting already running xsession or only auto-logging in once

My goal is an Arch based HTPC which on one tty runs XBMC and on another runs a minimalistic desktop (mainly for web browsing). I haven't yet started on the XBMC slice of the pie, but at the moment it ...
4
votes
3answers
4k views

cat corrupts serial port data

I have an application which writes some bytes to a serial port. When I do cat /dev/ttyS0 to see what is being transferred, I find that the data is corrupted by the cat command. Is there any other way ...
7
votes
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 ...
3
votes
2answers
515 views

Print console colors

Wrote a bash function to display the console colors. But, it seems some of the colors are not possible to show that way! (?) Also, note the strange "bright black"! (Note: The below screendump is of ...
12
votes
2answers
463 views

Possible to configure Login TTY over Audio device (Morse code or similar)?

One of the most miserable aspects of my day job is the need to occasionally investigate problems with machines scattered in remote locations all over the world that don't have network access to the ...
2
votes
1answer
123 views

Make 'CTRL-/' behave the same in vtty and xterm

When I press Ctrl+/ in a graphical terminal (e.g. xterm) I get "undo". However, in a virtual terminal (e.g. Ctrl+Alt+F1) I get "backspace". In practice I run into this when I'm using emacs in a ...
8
votes
1answer
2k views

How do I use a font in .ttc format as the console font?

I rather dislike the available tty fonts and would rather use Menlo, which is what I use in OS X's Terminal. Menlo is in a .ttc format, but (from the contents of /usr/share/consolefonts) Linux seems ...
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 ...
38
votes
2answers
4k views

Can a terminal emulator be as fast as TTY 1-6?

I've been trying various terminal emulators lately, from the built-in gnome-terminal, aterm, xterm, wterm, to rxvt. The test I've been doing is in this order: Open up a tmux window with 2 panes The ...
13
votes
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 ...
8
votes
4answers
8k 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 ...
10
votes
2answers
9k views

set baud speed for tty

How do I set the baud speed for a specific tty (in this case a serial port)? I tried using stty -F /dev/tty.iap ispeed 19200 But get the error Invalid argument for every speed I try (2400, 4800, ...
1
vote
0answers
444 views

LMDE, Graphics with i915 and KMS: DVI not working on tty consoles

I already asked the same question at Super User, but I think it's better suited here, sorry: I have some problems getting the DVI output of my onboard Intel graphics device running when using KMS. ...
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 ...
4
votes
1answer
915 views

Disabling or changing console switching keys

For some reasons on my Ubuntu 11.04 Natty running Linux 2.6.38-13, with an Italian layout for the keyboard, the keystrokes AltFx switch between virtual consoles (instead of the normal CtrlAltFx ...
9
votes
2answers
3k views

Rebinding/disabling CTRL+ALT+F#

I have an application that binds CTRL+ALT+F7, but my linux machine seems to catch the keystroke. Is there a way to rebind/disable this key? A recompile of the kernel is an acceptable answer. The ...
6
votes
7answers
3k 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 ...