Questions about using the command-line interface (CLI).

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How to turn off Logitech K810 keyboard back light automation

I could not find terminal command to turn off the back light of keyboard. For example the following commands do turn off my laptop keyboard back light : sudo chmod 777 ...
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1answer
37 views

Shell script to remove unity launcher(if present in Ubuntu 14.04 ) and/or the xfce panel (in the case of xubuntu)

Just want shell script to remove unity launcher(if present in Ubuntu 14.04 ) and/or the xfce panel (in the case of xubuntu). If anybody has idea about the same then please let me know. Thanks
1
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3answers
40 views

Remove whitespace from all array elements

I have a array called arrayvar . Which is being defined as arrayvar=( $(awk '/'"$vovar"'/,/}/ {gsub("'"$vovar"'"," "); gsub("}"," "); gsub("{"," ");gsub(","," ");print}' temp1 | tr -d '\n' | sed ...
1
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1answer
30 views

Storing some strings in a array

I have this sCSISmart1 TRAP-TYPE ENTERPRISE cyclone VARIABLES {cycHostAdapterNumber, cycHostAdapterID, cycManagerID} DESCRIPTION ...
1
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1answer
30 views

Why are these characters written to the terminal during clear?

I recently did a clear on my terminal and found that the following characters were printed on a the line above: [unknown character]3;J I did a clear | hexdump to look into this and found that the ...
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3answers
48 views

Can someone give me a rundown of the 'cat' command and what it's used for?

I'm an intermediate, possibly more on the beginner side, user of bash and the terminal. I've seen the cat command come up in some online stuff, and I was just curious as to what it did, and what it's ...
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3answers
226 views

How to remove domain part of each line from text file containing email addresses

I have a text file with one email address per line. How can I remove the domain part but not the TLD part of each line? In here, we would define TLD to be the last element of the string after the last ...
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0answers
10 views

vlc failed play rtsp video from command line

I am using Ubuntu and VLC for an application which needs a tiled-of 5X4 videos in the screen. The video source are ip Cameras and it transmit videos as RTSP streams. the sample URL to access the feed ...
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1answer
11 views

ECS not an option in AWS CLI?

I'm just getting started with Amazon EC2 Container Service and I'm trying to follow this guide: http://docs.aws.amazon.com/AmazonECS/latest/developerguide/ECS_AWSCLI.html I'm on puTTY (ubuntu) and I ...
1
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1answer
28 views

Command runs at ssh login, don't want it to

When I SSH into my ubuntu server, I get the normal system info splash thing, but then a command runs immediately after, and I can't seem to track it down. Last login: Tue Jun 30 15:20:22 2015 from ...
1
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1answer
24 views

How to use shell variables after doing sudo su

I am writing a script to fix a missing 'F' letter in a mail log file. The mail log file is continuously updating. I am getting a file name, after that I am doing 'sudo su' to get superuser access. ...
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2answers
29 views

install ibus-typing-booster on Ubuntu

I tried ibus-typing-booster software on fedora. Is this available for Ubuntu? This is really useful software that I will like to use. Update: I tried to install it using the following steps. But ...
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1answer
2k views

How to display random jokes from www.icndb.com in your terminal?

I already know that you can get some nice quotes/jokes using the fortune program. But I've found in this urwird script a new source of fun that I'd like to have when I open a new terminal. This time ...
8
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5answers
3k views

How to alias 'git' to 'g' so that bash-completion rules are preserved?

If I do this: alias g='git' I loose all completion rules (i.e. branches and remotes are no longer being automatically completed when I hit TAB after typing, for example g push o).
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0answers
28 views

Using sed to remove all lines containing special characters , numbers, and spaces

So I'm fairly new to using shell--bash specifically--and I'm in the process of writing a script which will translate files containing DNA sequences into a more useful format. Unfortunately, many of ...
13
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7answers
7k views

How to get a list of all the commands available for Ubuntu?

I want to start using the terminal more often, but I don't know what are the different commands available to me. Is there a way to list all the different commands that I can make use of?
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1answer
37 views

Cannnot run a .sh file in terminator [on hold]

I am having trouble running a .sh script file in Terminator, however I can run it perfectly fine in the default terminal Ubuntu comes with(gnome-terminal). This is what I get when trying to run it in ...
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1answer
45 views

How to create and exploit a zip bomb? [on hold]

I am trying to create a zip bomb using shell. In one of the previous answers on the site, I saw this: dd if=/dev/zero bs=1000 count=1000000 | gzip > test.gz How does the above command work ? I ...
176
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14answers
231k views

How do I fix my locale issue?

I am getting this message every time I do something like starting or stopping a service. perl: warning: Setting locale failed. perl: warning: Please check that your locale settings: ...
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4answers
57 views

What is the group id of this group name?

How to get the group ID GID giving the group name. The output would be for example: Group adm with GID=4
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1answer
24 views

core file size with ulimit

My question is probably not related to Ubuntu in particular, but since my desktop running this OS, I came to this forum. I am trying to change the core file size using ulimit -c command as follows: ...
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2answers
128 views

How do I write a Bash script for this scenario?

I have these files in the directory home/acs. TBBN027162G_38d8-2f08-0c40 TBBN027605G_38d8-2f08-1518 TBBN027941G_38d8-2f08-0d1c TBBN027923G_38d8-2f08-35e4 I want to read TBBN027162G as service_id ...
2
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2answers
178 views

How to cancel next job in order after rsync

If two jobs are entered into bash command line separated by semicolon: $ job 1; job 2; How do I cancel the second one? If I press CTRL+c, the first one will be canceled and 'job 2' would start, I ...
112
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14answers
257k views
2
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1answer
25 views

Passing Variable into awk gsub

I have this command Here vovar=OBJECTS prvar="$(awk '/'"$vovar"'/,/}/ {gsub("$vovar"," "); gsub("}",": %s,"); gsub("{"," ");gsub(",",": %s,");print}' temp1)" Contents of temp1 ...
148
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4answers
42k views

Why did the command “:(){ :|: & };:” make my system lag so badly I had to reboot?

DANGER! Do not run this command to 'test' it unless you are prepared for a crash and/or force-rebooting your system. I was in my Virtualbox running 12.04 trying to compile an app, and while ...
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2answers
27 views

Is there any command line to show tree view directory? [duplicate]

Many tutorials depict tree-view directory to show how they organize their files. Is there any command line to show such view? Is ls capable to do this?
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1answer
281 views

ls command not working in ubuntu 14.04

I was trying to use ls command in my ubuntu 14.04 but it keeps on showing the following error, ls: unrecognized option '--color=auto' BusyBox v1.21.1 (Ubuntu 1:1.21.0-1ubuntu1) multi-call binary. ...
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0answers
11 views

Navigating Directories [duplicate]

I am a new ubuntu user, and i am trying to figure out the terminal. I am using V. 13.10 and my problem is happening even in the begginning. I can't navigate to any directories from the base root of ...
6
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5answers
271 views

How do I delete everything after second occurrence of quotes using the command line?

I have this store in a variable sCellEventTrap-03-28 TRAP-TYPE -- CAC Code: 00 ENTERPRISE compaq VARIABLES { scellNameDateTime, scellSWComponent, ...
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0answers
22 views

Ubuntu 14.04 desktop goes to sleep when issued “poweroff” command while lid closed?

My ubuntu version is 14.04 LTS. I used the following command to shutdown the system after a certain process was completed (This process takes a long time to complete, so I needed a way to ...
7
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1answer
101 views

How can I send commands to specific terminal windows?

I'd like to write a script for opening multiple programs (servers) simultanously in separate terminals - doesn't matter which one - and assign different commands to different terminals with commands ...
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0answers
31 views

how to add opened filename to the title bar of a terminal?

I have tried hard googling changing the default display of the title bar of the Terminal by adding the following into my .bashrc file PROMPT_COMMAND='printf "\033]0;%s@%s:%s\007" "${USER}" ...
1
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1answer
49 views

How do I simply run an ubuntu touch app from the terminal?

I've got a qml file and I just want to ssh to the phone and do qmlscene myfile.qml Is it possible without doing all that stuff with SDK and packages? Just vim and some simple commands that can fit ...
0
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0answers
14 views

Getting Rid of Autojump

I just removed autojump and I still get this line whenever I access my command terminal: bash: /usr/share/autojump/autojump.sh: No such file or directory I used sudo rm -rf autojump as my primary ...
0
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2answers
47 views

create scatter plot

file (1. arg) will create (scatter plot) for n. column (x-axis, 2. arg) and m. column (y-axis, 3. arg) function is called myfun sourcefile 1 3 for scatter plot of 1. and 3. column from file ...
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2answers
30 views

emacs closes when terminal closes [duplicate]

I open a file with emacs through terminal just typing emacs file.txt and when I close terminal, emacs closes too, and when I try to execute another thing terminal doesn't let me becuase keeps ...
39
votes
7answers
18k views

How to copy a file to multiple folders using the command line?

I have tried to copy a file test.txt to multiple directories with one command: cp ~/test.txt ~/folder1 ~/folder2 But I didn't succeed. Is there a way to do that in one command so I can copy a file ...
0
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2answers
20 views

appends n-th line from the file x at the end of the file y

I have been asked to write a command that appends the n-th line (MYN) from a file (x)to another file (y). Here's what I've done so far: MYN=4 hey=$(awk 'NR==$MYN' x) echo "$hey" >> y But why ...
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0answers
20 views

error installing mongodb on trusty

I'm trying to install mongodb on the trusty tahr following this tutorial: http://docs.mongodb.org/manual/tutorial/install-mongodb-on-ubuntu/. When running the first command (sudo apt-key adv ...
2
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1answer
45 views

Print characters behind the digits

function/script, that for argument in format (alphas and digits) afa5hgt3tt, errerew9ax66w, prints characters behind the digits many times as value of digit, e.g. hgthgthgthgthgttttttt ...
0
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2answers
38 views

How to make a script delete a directory after checking for its existence?

How might one make a bash script which when run will check for the existence of a file/folder and if the file/folder is there remove it?
3
votes
2answers
56 views

How to execute a custom script when Internet reconnects?

My Internet gets disconnected every now and then. I'd like to run a Bash script every time the Internet reconnects. The script is quite simple: #!/bin/bash mplayer /home/user/sound.mp3 It's placed ...
6
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4answers
278 views

Sort by image resolution (dimensions)

Which program have a function to sort images by thier pixel size / resolution / dimensions. Very strange but even so powerfull DigiKam doesn't have so simple function. Any suggestions?
0
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1answer
77 views

How to run a command automatically after completing download?

I need a way that helps me to run a command automatically after a download completes. I want to create a directory beside the downloaded file automatically after I clicked on the integrated download ...
3
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1answer
27 views

How to execute bash aliases functions in the terminal?

I found out that many people have something like in their /etc/bash.bashrc as aliases: del_recursive() { find . | grep '$1' | xargs rm } process() { ps -ef | grep $1 } apache() { sudo ...
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0answers
21 views

Execute .sh file, neither in terminal or interface+graphics card issue

I've just installed Ubuntu 15.04 a few days ago, it runs pretty well so far. But I wanted to upgrade it a little and started to play around with tweaks and other stuff. Trying Cairo, I saw that ...
3
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2answers
48 views

pkexec command in a .desktop file

I made a .desktop file for Androxyde's Flashtool (utility for Sony Xperia devices that I have to open with an executable file in its folder) that requires root privileges to use fastboot utilities. I ...
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0answers
31 views

hcitool scan does not find my bluetooth device

I have a small device that has a bluetooth chip. I can see it through the GUI System Settings > Bluetooth, when adding and discovering a new bluetooth device nearby, but every time I try this command ...
1
vote
1answer
4k views

How to use put command in tftp

How to use put command in tftp to send file to server host in that articular directory remotely ,