A terminal is an environment for text input/output. Inside the terminal, one runs command-line and text mode programs (including shells).

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4
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2answers
3k views

Ctrl+a+d exiting terminal?

I don't know what I have changed, but if I am on a terminal and I press Ctrl+a+d (that is, the three keys simultaneously) the terminal is killed. This is on gnome-terminal on Ubuntu and using zsh as ...
11
votes
2answers
3k views

What’s the difference between a “raw” and a “cooked” device driver?

Does this concept only apply to terminal drivers (which is what most sites cover) or to any driver in general?
12
votes
3answers
6k views

Why don't my arrow keys work in sh?

I recently installed Ubuntu and when I run sh on the Terminal my arrow keys don't work so I can't go through my call history or edit whatever I'm typing. It just comes out as weird characters like ...
0
votes
1answer
369 views

Non printing characters

I would love to get the mappings to work for keyboard shortcuts shown here http://ascii-table.com/ansi-escape-sequences.php I have the hang of color but for some reason nothing else seems to work!
16
votes
2answers
8k views

How do I leave a message for another (local) user?

I know you can use write to send a message to a currently logged in user, but how do you leave a message for a user who is not logged in? The solution I have seen is modify the motd, but that will be ...
7
votes
2answers
609 views

DEC ANSI command sequence questions; cursor movement

So I'm writing a terminal emulation (I know, I should just compile putty, etc.) and am at the stage of plodding through vttest to make sure it's right. I'm basing it on the VT102 for now but will add ...
38
votes
3answers
22k views

What are pseudo terminals (pty/tty)?

This might be really basic question but I want to understand it thoroughly. What is a pseudo terminal? (tty/pty) Why do we need them? How they got introduced and what was the need for it? Are they ...
4
votes
1answer
2k views

Load my .profile for bash in Emacs terminal buffer? (multi-term mode)

I've got multi-term mode (derived from ansi-term) with bash started in Emacs 23.3, which is a terminal emulator running in Emacs. However, I noticed that it did not load my user profile, including ...
1
vote
1answer
556 views

Improved MySQL interface

Is there a MySQL terminal prompt that supports things like tab-completion and history? The standard one that comes with MySQL doesn't have those features
24
votes
7answers
30k views

How to disable line wrap in a terminal?

I need to view large logs files using a bash shell. I was using less to open the files, but since the lines are too lengthy there is some kind of line/word wrapping going on. Since the files are ...
5
votes
3answers
43k views

How to find which Process is causing High CPU usage

Is there any way to find out from terminal which process is causing high CPU Usage ? It would also be useful to order processes in descending order of cpu Usage
4
votes
1answer
313 views

Emacs ansi-term and term not working well when I ssh into a remote machine

I have the exact same Emacs configuration on a local and remote machine, and when I run M-x ansi-term or M-x term on each of them individually everything works great. However, if I run any of these ...
3
votes
2answers
2k views

How to remove/change the message displayed when opening a terminal?

Using Ubuntu 10.10 .In GUI mode when I open up a terminal, a message is displayed at top left above the prompt: Ghost@work-Ubuntu:~$ , I would like to change it, so I would like to know in which file ...
2
votes
2answers
5k views

Displaying and updating a counter in bash

I think it's something like this: (Fedora14/bash) #!/bin/bash for i in {0..10..1}; do echo -e "$i"'\c' echo -e "\n\r" sleep 1 done But it doesn't work. Purpose: like this, but without the ...
0
votes
0answers
96 views

Open Sakura in home directory [duplicate]

Possible Duplicate: Open Sakura in home directory I love XTerm but I would like to enable tabbing (multiple terminals in one window separated by tabs). The terminal Sakura is based on ...
2
votes
1answer
639 views

Open Sakura in home directory

I love XTerm but I would like to enable tabbing (multiple terminals in one window separated by tabs). The terminal Sakura is based on XTerm and tabbing is enabled. I can open XTerm in my home ...
0
votes
0answers
254 views

What is the difference between a terminal and a console in unix? [duplicate]

Possible Duplicate: What is the exact difference between a 'terminal', a 'shell', a 'tty' and a 'console'? What is the difference between a terminal and a ...
3
votes
2answers
3k views

Trying to print up down arrow keys

I have this: I read down arrow key abc@abc-ubuntu:~/bashpratice$ read -n 3 key ^[[Babc@abc-ubuntu:~/bashpratice$ I am able to grep for it abc@abc-ubuntu:~/bashpratice$ echo $key | grep '\[' [B ...
6
votes
1answer
2k views

Is there a way to show previous messages in screen?

When I use screen I can only see the current data on the terminal (commands, messages, etc.). Is there a way, apart from printing anything I want to a file, to see the previous messages (the same ...
2
votes
1answer
704 views

Setting only of background or text color back to default

Is it possible to only reset the background color or text color back to default (not both!) Example: echo -e "\033[32;41mFoo bar\033[30m baz" # Doesn't reset background color echo -e "\033[32;41mFoo ...
6
votes
2answers
6k views

xterm colors are too bright

I've just started using dwm a couple days ago and I'm using xterm (uxterm) as a terminal emulator. However, I'm noticing that certain applications (like vi/vim, ls, and others) that output in color ...
2
votes
2answers
904 views

How to temporarily disable the Escape key in a Terminal?

I am parsing keyboard input via read -n 1 and I haven't found a way to distinguish between an actual key-press of the Escape key and the first Escape character (byte) of a control sequence generated ...
16
votes
9answers
32k views

Best way to use a shell with Cygwin in Windows 7

I installed Cygwin, to be disappointed that bash by default runs within "cmd.exe". I googled around and found Console2. It's not a particularly well-designed application, as doing adjustments is ...
3
votes
1answer
807 views

Keyboard input not displayed on the screen?

We use the `exceed tool to connect to our UNIX servers, but sometimes the command-line behaves erratically. When I am typing some command on the command-line, nothing happens -- nothing is displayed ...
4
votes
3answers
1k views

clear command in Konsole

I know about the Linux clear command, but it just moves the previous output from the visible part of terminal window (KDE Konsole). I can still scroll up and see all previous text. Is there similar ...
4
votes
3answers
2k views

Read and process a string, char by char, yet allow user to simple line edit the input

I want to incrementally read a line of input from the terminal, and allow the user some basic line editing functionality; INS, DEL, RIGHT, LEFT HOME, END, BACKSPACE Each time the string is ...
6
votes
1answer
250 views

How can I output “temporarily” to the shell, like zsh tab completion does?

In zsh shell, when you hit Tab twice to get tab completion, your options are displayed below your prompt. But when you make a selection, the options disappear. I have a little script that outputs ...
7
votes
3answers
1k views

Bash history number not starting at 1?

I was customizing my bash prompt (I'm on OS X 10.7) when I came across something strange. Within my prompt I included !, which should give me the history number. However the history number always ...
11
votes
2answers
21k views

How can I switch between ttys without using screen?

So lets say you boot up your linux install all the way to the desktop. You start up a gnome-terminal/konsole/whatever so you have a tty to enter commands to. Now lets say I SSH into that same ...
2
votes
2answers
769 views

Computer terminal and virtual console [duplicate]

Possible Duplicate: What is the exact difference between a 'terminal', a 'shell', a 'tty' and a 'console'? I was wondering what relations and differences ...
2
votes
5answers
2k views

How can I run a process in a terminal window and then hide that window?

I want to run python ~/program/proxy.py in a terminal when I boot up. And then hide this terminal window (because it is just a proxy program, and I don't want to see the debug info). So how can I get ...
4
votes
1answer
1k views

urxvt transparent cursor

I've changed my .Xdefaults for a black background, white foreground, but my cursor is now opague. I can't see the letter I'm over, and worse, I can't see my screen hardstatus. Google is just pulling ...
20
votes
4answers
5k views

What happens to the output of a process that has been disowned and lost its terminal?

If I close the virtual terminal, where some process was started, does the output just go straight to /dev/null, or can it pollute memory somehow? Can I anyhow grab the output to continue reading it at ...
3
votes
1answer
484 views

Conditionally killing a process based on its output

I have a REPL (read-eval-print-loop) for the Clojure programming language listening on a network socket. I can send it code over the network and the code will be evaluated and the answer sent back to ...
6
votes
3answers
1k views

Why does Ctrl+Arrow make my terminal switch to a strange mode?

When i type Ctrl+Left or Ctrl+Right within Guake or gnome-terminal the last one's behaviour turns to a some kind of non-usual mode: - key acts like arrow up and + like arrow down, v runs Nano, etc. ...
6
votes
3answers
4k views

Launching application from terminal [duplicate]

Possible Duplicate: How can I close a terminal without killing the command running in it? How to launch a GUI application (e.g. gedit) from terminal and detach it from there in one step?
2
votes
3answers
15k views

Why use `sudo yum install <pkgs>` when I can use `yum install <pkgs>`?

The above question can also be rephrased to, what is the use of the sudo command? man pages for sudo in the bash shell has the following description. sudo, sudoedit - execute a command as another ...
3
votes
2answers
1k 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 ...
8
votes
1answer
10k 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 ...
0
votes
1answer
96 views

Ubuntu x86 10.10 terminal

I just downloaded a Ubuntu v10.10 vmware image for Windows. I'm trying to install a web application that can only run on Linux MySQL, Apache and PHP. How do I open a terminal in Ubuntu?
0
votes
3answers
398 views

What to change to place text in the centre of the screen [closed]

The following program will clear the screen #include <stdio.h> int main() { fputs("\033[2J", stdout); return 0; } So, what should I modify/add in the above code to put a text string ...
5
votes
2answers
7k views

How can I make PuTTY compatible with Solaris?

I'm connecting to a Solaris machine from WinXP using PuTTY. When I try to use the NumPad keys for editing a command in Bash (Home, End, Delete) a ~ character is instead printed to the console. ...
2
votes
1answer
603 views

How to resume multiple instances of Screen from command line with minimal steps?

I have about 15 instances of screen running on my linux server. They are each running processes I need to monitor. I had to close terminal (hence the reason I launched screen). Is there a way to ...
34
votes
2answers
38k views

How to signal the end of stdin input in bash

In Bash, I learned that the ending signal can be changed by here document. But by default how can I signal the end of stdin input? I happened to find that with cat and chardet, their stdin inputs can ...
13
votes
4answers
1k views

How did they manage to drive a Unix computer before mice and copy & paste?

Since Unix is 40 years old, Unix is older than the invention of the computer mouse. (actually only 3 years if Unix is from 1969 and the mouse from 1972) How in the world did a new user do anything ...
13
votes
2answers
3k views

Kernel Mode Setting vs. Framebuffer?

With KMS, the graphics drivers are moved into the kernel. Since the framebuffer was already in the kernel, I wouldn't expect this to affect framebuffer operation. Yet, I read that KMS supercedes the ...
19
votes
5answers
18k views

view stdout for another pts [duplicate]

Here is the situation. I left my pc at home doing an rsync from a 2TB hard drive to another 2TB hard drive (it's going to take a while since they are both USB 2.0). I am now at work and I have ssh-ed ...
27
votes
6answers
20k views

Removing control chars (including console codes / colours) from script output

I can use the "script" command to record an interactive session at the command line. However, this includes all control characters and colour codes. I can remove control characters (like backspace) ...
4
votes
2answers
1k views

Strange Character in my Bash prompt?

I'm somewhat new to Bash prompts, but I was finally able to get things somewhat working. However, I have a strange character at the beginning of my prompt: Here's my actual PS1 prompt: ...
44
votes
3answers
21k views

How can I break away from an SSH session that has crashed?

Many times I have an SSH session that doesn't respond anymore (for example, when I lose internet connection and then reconnect). Ctrl+C, Ctrl+D, Ctrl+Z and a zillion of key presses don't have any ...