Tagged Questions

1
vote
2answers
47 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 ...
3
votes
2answers
49 views

Reading from a serial interface

I have a serial device running which I need to read data from(I have absolutely no control over the device itself) except reading its output; using hyper terminal in Windows I am able to detect a ...
1
vote
1answer
62 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 ...
0
votes
1answer
49 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 ...
1
vote
1answer
498 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
104 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 ...
24
votes
1answer
431 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 ...
5
votes
3answers
193 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
42 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 ...
1
vote
3answers
338 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 ...
12
votes
2answers
2k 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?
2
votes
2answers
293 views

Why are there so many virtual terminal devices?

I've been reading the advanced linux programming book availalble free online linky and it mentiones about virtual terminals which if I understood it correctly it is a Linux specific feature (not in ...
3
votes
1answer
144 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 ...
2
votes
0answers
554 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
303 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 ...
2
votes
2answers
573 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 ...
2
votes
1answer
725 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
2answers
1k views

How to start plasma-desktop from SSH-console on desktop session?

I killed KDE's plasma-desktop on a openSUSE 11.2 machine, because it was eating too much CPU. How can I restart it via SSH or another tty session? On the affected computer there is only shown a ...
9
votes
2answers
4k views

Difference between pts and tty [duplicate]

Possible Duplicate: What is the exact difference between a 'terminal', a 'shell', a 'tty' and a 'console'? I always see pts and tty when i use 'who' command ...
5
votes
1answer
102 views

How do I ensure that a terminal remains scrollable?

On my tty terminals (1-6), I lose text when I move away from it and back (i.e. pressing ShiftPg Up doesn't reveal any scrolled-off text). How can I recover this text?