Tagged Questions

7
votes
1answer
133 views

“w | tail” chops text at right margin (78 characters)

Summary: w | tail chops rows after 78th column. When I run the "w" command, it works as expected. However, when I pipe the output to "tail", it chops the output to 78 columns wide (truncates anything ...
4
votes
2answers
114 views

How can I hook on to one terminal's output from another terminal?

I need to hook onto output of currently running terminal (tty1) from virtual terminal and capture it (running X server). I'm pretty sure such a thing is possible by simpler means than debugging ...
1
vote
2answers
68 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
58 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 ...
1
vote
1answer
473 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
429 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 ...
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 ...
3
votes
2answers
87 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 ...
1
vote
1answer
92 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.
0
votes
2answers
244 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 ...
2
votes
2answers
522 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 ...
23
votes
2answers
923 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 ...
5
votes
2answers
2k 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 ...
3
votes
0answers
73 views

any way to un-disown / re-attach an interactive process to the tty? [duplicate]

Possible Duplicate: How can I disown a running process and associate it to a new screen shell? In bash is there an opposite of disown, that is, to re-attach a process I've accidentally ...
5
votes
1answer
254 views

Why does reading from two connected pty's cause an infinite loop?

I want to fake a gsm modem for testing a program. I want the program to send AT-codes to me and that I can answer it back, kind of a VirtualSerialPort. But for some reason the data written from the ...
3
votes
3answers
348 views

Difference between the terminal file and the terminal screen

I recently posted a question about terminals and this seemed like it deserved its own question. If the tty which would be synonymous with terminal, is just the device driver/device file itself, what ...
3
votes
1answer
388 views

Outputting to the screen on an ARM Mini2440. Currently just has a login prompt

I have a mini2440 ARM computer with a small screen and currently have it booting Debian Squeeze. I'm communicating with it over a serial connection using minicom. When the thing boots it gives me a ...
11
votes
6answers
21k views

How to connect to a serial port as simple as using SSH?

Is there a way to connect to a serial terminal just as you would do with SSH? There must be a simpler way than tools such as Minicom, like this $ serial /dev/ttyS0 I know I can cat the output ...
3
votes
2answers
643 views

How to script /etc/issue?

I would like to pipe my tty number through figlet (ASCII generator) for the /etc/issue (message shown before login). Obviously this means I can't just update it from /etc/rc.local. On my system ...
5
votes
1answer
2k views

How to change tty login prompt?

To be clear, I am not referring to /etc/issue (shown before the prompt) or /etc/motd (shown after login), but the prompt itself, which is currently hostname login: For good measure, I am running ...
2
votes
2answers
417 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 (ALTCTRLF1). I would like to see it inside ...
232
votes
4answers
41k 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 do each of these terms refer to?