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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Cat and Less give different output

I executed the following command # top > /home/user/top_output.txt Nothing Happened for a while and then i pressed Ctrl+C. When i checked the file that was created, it had the contents in it. So ...
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3answers
1k views

Why 'echo $0' gives different result for two different terminals?

I opened a terminal on Ubuntu using Ctrl+Alt+T and a different terminal by going to a directory and then right clicking and choosing "Open in Terminal". I did an echo $0 in both cases. In the ...
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2answers
70 views

Why the duplications in the command line output

Entering the following command prints duplicates as shown below. Not all lines print twice but some do. What gives? XXXX:~ XXXX$ man -k pid pid(ntcl) - Retrieve process identifiers ...
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1answer
76 views

What's the problem with terminals vs colors?

I'm a long time linux/unix user, as almost anyone working with this kind of OSs I use the terminal or a terminal emulator a lot, but I never understood why it's so hard for any GNU/Linux distribution ...
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4answers
205 views

Incrementing a variable each time the system boots up

The idea is to initialize a variable and set it to 0. Then create a script that executes on boot and increments that variable by 1 each time the system boots up again. Sounds simple enough right?
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3answers
764 views

How to merge two files with different number of rows in shell?

I have file1 like this: CHR SNP TEST A1 A2 GENO O(HET) E(HET) P 0 AFFX-SNP-000541 ALL 0 0 0/0/0 ...
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1answer
110 views

Bash script for copying text currently entered to prompt

I'm trying to minimize using of mouse. Copying text in terminal is the mostly inconvenient activity for mouse avoiding. Now, tmux helping me to obtain this purpose. However, I regularly needs to copy ...
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1answer
136 views

set tab color in a tabbed terminal emulator

I would like to set in my terminal emulator (i.e. gnome-terminal) the color of the tabs like in the osx's terminal emulator. Is there this feature in any of the linux terminal emulator plethora? ...
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1answer
55 views

Zenity refuses to work in background

I'm trying to create a background bash script which creates a popup in certain circumstances, however, my code only works when run manually in a terminal (e.g. not in the background). I've tried ...
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2answers
303 views

Is there a way to lock terminal's title?

Sometimes there're lots of different sessions opened in own terminal's tabs and it's rather desirable to have theirs initial titles (named by session name) locked since local title tweaks make those ...
2
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0answers
162 views

Create clickable links in terminal

It's possible to create grep-command results file names like a link - for open editor? I want click to filenames in grep result and open my editor with selected line $ grep "mServiceIntent" -R ./src/ ...
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2answers
79 views

Command to restore filesystem to state after installation of the OS

How can I wipe all the changes to the filesystem since installing the OS? It's not that I want to destroy the files because they contain sensitive data or anything like that; I just want to start over ...
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1answer
226 views

Why do we need so many terminal emulator packages and what is their use?

This is something that has been so confusing to me for a long time. I am using Linux but I have gaps in my understanding of certain aspects and one is about the terminal. As I came to understand it ...
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1answer
88 views

Host name on terminal changes when I connect internet : why?

[acme@localhost ~]$ su Password: [root@localhost acme]# Now I connect internet and I get the following: [root@localhost acme]# exit exit [root@localhost acme]# su [root@dhcppc9 acme]# Edit ...
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0answers
188 views

Passing escape sequences to shells within ansi-term in Emacs

In a regular terminal (e.g. iTerm2 on OS X) I can connect to a database, e.g. > psql .... and then, as I type my command in psql, e.g. $ select foo from bar I can move around (as I type psql ...
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1answer
23 views

How exactly is a Linux desktop/device/display expressed in a terminal?

My plan is to use vpxenc (video encoder) and flac (audio encoder) to record the screen/microphone, but I'm stopped short of entering the input (file) in the command line. How can I exactly address a ...
3
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4answers
833 views

Pipe all input and output of terminal to file

I do not know if this is even possible or not, but in an attempt to keep track of many changes I am about to make to my system I want to track all input I type and all output from a terminal I'm ...
2
votes
2answers
107 views

Show a sliding window of output from a program

I want to run a command (rsync -av) and only display 10 lines of output at any time. I have found a similar post, but I don't want to redirect it to a file. I want the output to be displayed ...
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1answer
182 views

UTF-8 in Terminator

I use the Terminator terminal emulator, and out of pure boredom, I installed and attempted to run this program: https://github.com/thiderman/doge However, it requires UTF-8 encoding to work. I opened ...
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3answers
789 views

Overriding the shade of color displayed

I have to work on systems which display some colors that are hard to read. I ssh into these systems, but don't have management permission to change the colors they display. Is there any way I can ...
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1answer
174 views

Include colouring in GNU ls time-style

I know, I can specify custom time format for ls like this ls -lAF --time-style="+ %Y-%b-%d %H:%M:%S" --color=always but I would like to "smuggle in" colors inside the time format. For example, I ...
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1answer
189 views

Mac 10.9.1 // Gerris installation //

I am trying to install Gerris . The website is : http://gfs.sourceforge.net/wiki/index.php/Mac_OSX_Installation I followed the instructions. But I could not install Gerris Dependencies. I installed ...
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2answers
1k views

Is it harmful to close a terminal window without properly exiting an application?

Using Ubuntu 12.04 LTS, my question is that if I started an application in a terminal window, then is there anything bad about just closing the terminal window without exiting the application properly ...
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63 views

Slow terminal print out

Just installed (netinstall) debian wheezy on a second machine newer machine however the terminal print out is noticeable slower than on the old machine although the new have faster CPU, RAM and HDD ...
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2answers
262 views

How do I get rid of the small nub in the bottom right corner of my terminal?

I'm setting up XMonad within Linux Mint, and I've been able to remove the menubar and the scrollbar from my terminal windows, but I can't get rid of the small resizing nub in the bottom right corner. ...
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241 views

How to change colors of all running urxvt instances?

I'm used to black background and light green text when working on my urxvt terminals. But sometimes, when I take my laptop outside, it becomes hard to read and I'd like to change the colors of all my ...
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21 views

remotely connecting to Unix from Mac to use Gerris simulation

I am trying to run a simple file on Gerris software (is like gnu) on a remote Unix machine. I moved the simulation file written in nano into remote machine say dps11. samires-mbp:~ samirebalta$ nano ...
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1answer
55 views

How to open a directory and save code in it Gerris in Linux?

I am new to this Unix and Gerris (software) world. I have to simulate. but I cannot open and type these codes below in vortivcity directory.I am using remote connection from mac to university machine. ...
3
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1answer
205 views

Using a variable inside a sequence of commands in bash to supplement an existing string - syntax error or flawed design?

I'm using the following sequence of commands in my .bashrc file to alter the appearance of my linux terminal. It fills the screen line by line with a pattern made out of characters. There is no ...
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2answers
349 views

Keeping xterm terminal alive on crunchbang linux debian wheezy

I like to keep a number of terminals open at different locations on my development VM. For this I use terminator because I got a big screen and I can divide the terminals anyway I want. But after ...
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1answer
181 views

How do I find out the keycodes for Ctrl+up and down arrow for TERM=screen?

I am using tmux a lot, and I have already managed to tune my OS X terminal to send the correct key codes for Ctrl+left and right arrow (\033b and \033f). I found those information on the web. However, ...
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172 views

Clear / erase a mistyped password in a terminal

One thing that annoys me using Linux's terminal is when I have to type a invisble password, like when you run ssh the terminal I was wondering if there's a way to clear/erase the invisible password ...
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926 views

Minimalistic terminal music player that can play all my files randomly

I'm looking for a terminal music player. mpg321/mpg123 is quite what I need, but it can't play all my music directory (which contains child directories). cmus seems to be a bit of an overkill, as ...
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2answers
318 views

Processes do not respond to my signals

I have a strange behavior on my system. When I invoke a command in the shell (bash version 4.2.45(1)-release), say top or cat, the running program (the process) does not respond to Ctrl+C. I even ...
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1answer
45 views

Different representation of bash in 'ps -f' command [duplicate]

I have two bash running; one is Terminal application that runs bash, the other one is xterm application that runs bash. With ps -f, I have -bash one, and bash at the other. What makes this ...
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1answer
74 views

Some garbage characters in Linux terminal

My embedded linux app sometimes outputs the text like this: root@variscite /mnt/nfs$ ./test GPIO_IMX6_C: i=1 cannot open GPIO device file /sys/class/gpio/gð½Å¢ ...
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2answers
93 views

Why does the bell character have a limit?

If I repeatedly execute echo -e "\a" it will only sound on regular intervals rather than every time I execute the command. I've tried shortening the duration using xset but this doesn't seem to ...
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0answers
33 views

Where to find the downloaded file after dragging a FTP URL to the terminal?

Usually, when I drag a link to the terminal, the link target is pasted in the terminal. However, when I just dragged a FTP link from Chromium to my Terminal (first result on Google for "ftp pdf", ...
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1answer
191 views

Saving terminal windows in mint

How can I save all the terminal tabs(with each current pwd in each tab) and terminal window positions.
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41 views

Convert command produces a small error [closed]

First off, I'm on a Mac, but I think this can be solved here. I'm converting a .gif animation to a series of .png's using. $ convert ex.gif my_png_files_%d.png I get a series of .png-figures but ...
2
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1answer
81 views

Why when I enter the command “hostname” it returns something other than my computers name?

I am using a macBook Pro I enter: new-host-2:~ Justin$ hostname And it returns: new-host-2.home Why is this when it says in setting/sharing my computers name is "Justin's macbook pro" and computers ...
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3answers
4k views

How do I run safecopy in terminal?

I'm very new to terminal and Linux so apologies! I have a crashed external hard drive that is spinning but wont appear on the desktop. I ran safecopy from terminal and this is what it said at the end ...
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5answers
11k views

delete line in vi

How can I delete a line in VI? Here what I am doing right now: Open up the terminal alt + ctrl + t vi a.txt I move my cursor to the line which I wan to delete, then what key-combination is should ...
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3answers
381 views

Shell script testing through terminal simulation

I am developing a generic bash script which could be executed in different distro. I have only a CentOS virtual machine and I would be interested to test my script on a virtual terminal (online or ...
16
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9answers
1k views

How to make sure that a command is not interrupted, even if terminal is closed? [duplicate]

In Linux. Say I want to run a command and it takes too long. I just want to ensure it's done. How?
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2answers
774 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 ...
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752 views

Rename file in Mac OS Terminal using Regex

Hundreds of images need to be renamed with a terminal command using regex on MacOS 10.9 Mavericks. The files are named this way: 0045AW489R3T(IPCAM)_0_20131124101245_931.jpg ...
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272 views

How to change background and text colors in Yakuake?

I like Yakuake, but I don't like the grey background color. I want to change the background and text colors of the Yakuake terminal. I checked the options, but the background color option is only ...
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22 views

Hotspot on Linux Not Working: Already in use?

I was following my own article, but after having activated the Hotspot as mentioned, I get the following error: Address already in use ...
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1answer
70 views

Installing Certain PPAs

I'm following my own article: Making a Wireless Hotspot When I put in sudo add-apt-repository ppa:nilarimogard/webupd I get the message Cannot access PPA ...