Bash is the shell used in Ubuntu's command-line interface.

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Get file created by a program launched by a bash script

I have the next scripts: | base_dir/ | - test.sh | | tests/ | | - elaborato.sh test.sh run elaborato.sh elaborato.sh could create a file (not always it create a file). I need : to know the ...
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1answer
556 views

How to get PID of shell running in a terminal window under mouse?

Though similar questions asked before in this forum here , here and here, my question is different. I want to get PID of a running bash process in gnome terminal. Note: Suggested link which posted ...
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2answers
171 views

Autostart program whenever a file is added to a folder

I have Lubuntu 14.04 LTS on my laptop for a few weeks now. I have been working on customizing the OS and such quite a bit, as well as installing everything that I need for daily usage. One thing I did ...
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1answer
192 views

Writing a bash script to execute/automate install of drivers

i'm trying to write a script to automate the install of TV card drivers (for some reason i have to re-install after each ubuntu update). Would this work? I've tried it but it doesn't look like it's ...
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18 views

Problem during the usage of up and down keys for checking up and down arrows

I am facing an issue during the usage of up and down on gnome-terminal. Lets say my previous commands are vi pos_of_rightmost_setbit.cpp gcc -o harsha pos_of_rightmost_setbit.cpp At this point ...
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1answer
86 views

Desktop shortcut doesn't work for script but script work fine

#!/bin/bash/ ls -1 *.mp3 > playlist.m3u for (( ; ; )) do mplayer -playlist playlist.m3u; sleep 0.1; done This is the script and it works ! [Desktop Entry] Version=1.0 Type=Application Name=Play ...
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97 views

bash: Permission Denied when I move my CPP file to another location

I crafted a test CPP programme. It created a file in the home directory. It compiled with ease, and I could run it by typing ./rocketfire in the Terminal. Now, I did these: abhimanyu@AbhimanyuPC:~$ ...
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2answers
379 views

How do I get `tr` command to ignore newline?

I want to replace multiple spaces by a single space. I am using tr to do this. But it is also replacing new line with a space. How can I avoid it? Code: tr -s [:space:] ' ' Input: He llo Wor ld ...
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2answers
419 views

Why do I get different outputs in case of sh and bash?

I have the following simple script: #!/bin/bash echo "Bash version ${BASH_VERSION}..." for i in {1..99..2} do echo $i done Output in case I run with sh file.sh: Bash version ... {1..99..2} ...
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1answer
111 views

BASH script for extracting archives - how to make the script ask for folder destination?

I've started using the bash script below, for unpacking archives. How would I go about making the script ask if I would like to specify a folder, or just use the default folder to extract to? I'd ...
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2answers
714 views

Changing environment variables

I just changed my /etc/environment file to: M2_HOME=/usr/local/apache-maven/apache-maven-3.1.1 M2=$M2_HOME/bin ...
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1k views

How to get a colored bash?

How to get the bash colored like this?
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2answers
51 views

in a file match a stringa and print lines matching another stringb

Basically , i have a large file with more than 5000 lines in the following format Below snip given two blocks of the entire file. What i need is to search for given String name (eg: abcd etc) , and ...
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1answer
38 views

Redirect input from file

I'm writing a script (TEST.sh) that must run another script (TASK.sh)... Task.sh need two input... so I was thinking to redirect input from a file (I need to automize everything)... So, I was using ...
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1answer
145 views

Way of receiving alerts on login attempts, whether successful or not?

I believe my linux machine to be reasonably protected from external login. But since I am mildy paranoid, I would like to be alerted when there is a login attempt made to the server, whether ...
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2answers
182 views

Automatic screen capture script

I'm looking to accomlish exactly what Anwar Shah describes here Bash script to take screenshot and save the image - Ubuntu with the added functionality of setting a time increment for the script to ...
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1answer
67 views

Convert fb2 to txt

There are still a lot of devices that can't read fb2 and able to read txt. Also, txt version could take much less space compared to uncompressed fb2.
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1answer
121 views

Is sim a shell script command?

I was creating a sym-link for practice in Ubuntu 14.04. I meant to use this command: ln -s ../fun dir1/fun-sym It was taken from a book I am using. Except I used sim at the end by mistake. So the ...
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2answers
518 views

setting up a script to rotate scren Lenovo Yoga Thinkpad S1

I am trying to set up a Lenovo Yoga Thinkpad S1 to rotate the screen with the touch of a button but I am having a little trouble with the script that actually does the work. I have found the scripts ...
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1answer
240 views

How to disable notifications sound while XBMC is runnig?

I would like to know if it's possible to disable notification using XBMC (mails, network etc). I'm using Kubuntu 14.04.1. I've found this command but the script doesn't work, the sound is re-enabled ...
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366 views

Slow bash tab completion

My bash shell's tab completion is very slow, usually taking 1-2 seconds per completion. This only seems to happen when I'm using my laptop from work. Tab completion is very speedy when using my laptop ...
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1answer
205 views

Simple bash script not working

I'm pretty new to bash scripting. I'm trying to make a script to export the http_proxy variables. This is what I do from the terminal: $export http_proxy=http://proxy21.iitd.ernet.in:3128/ $export ...
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1answer
659 views

run bash script from another script and redirect its output

Hi everyone I have to do a program.. I'll be really concise to explain it... And hat I've already done and what i have to do... Simply, I have to do a "simulator" in Bash that run exercises of ...
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2answers
42 views

End script and restart it with the same options and arguments

Usually !! repeats the last given command. But it doesn’t seem to work in a bash script. Is there a way to end a script and repeat it with the exact same options and arguments given the last time? ...
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42 views

problem occuring while creating .exe file

I'm trying to run test problem in the mfix but got struck with an error sh: 0: Can't open ../../model/make_mfix. bhaskar@admin2-Precision-T7600:~/mfix/run/tests/Added_Mass$ sh ../../model/make_mfix ...
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870 views

Run terminal command (python command) at start up [duplicate]

New to Ubuntu, but have looked everywhere to get this question answered. Found no solution so far. Basically I need to run two terminal commands on startup, which follow each other directly. This will ...
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31 views

Same program, different version, in different locations…how to specify which to use?

Hi all I'm trying to run a program called cufflinks on my machine, however there appears to be a version of this in multiple places on my existing system. For example when I typed whereis cufflinks ...
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1answer
385 views

Home files and folders permissions could not be determined

I was trying to create a default configuration file for activemq with the command sudo ./activemq setup [ /etc/default/activemq | /home/leo/.activemqrc ]` Then recieved this message: INFO: ...
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152 views

How do I open an URL from a bash script?

I have a simple script to start a node.js webserver and open the URL in a browser. However the last part doesn't seem to work, it wont open the URL in a browser (or anywhere else). This is the code I ...
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8k views

How to compare two files

So basically what I want to do is compare two file by line by column 2. How could I accomplish this? File_1.txt: User1 US User2 US User3 US File_2.txt: User1 US User2 US User3 NG Output_File: ...
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29 views

How to rename various file extension into an extension [duplicate]

I have many files in a directory with various extension (files.txt, files.html, files.jpg, etc). I need to change all the extension of these files into an extension (files.ext.backup). So, I will ...
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1answer
1k views

Terminal flashing between current and previous screen

I just upgraded from Ubuntu 12.04 to 14.04. After upgrading the terminal will sometimes, but not always, flash between the current screen and the previous screen. Here are some examples: The output ...
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245 views

Terminal closing itself after 14.04 upgrade

All was fine in 12.04, in this case I'm using virtualbox in Windows. The upgrading process ran ok, no errors, no warnings. After rebooting the errors started to happen. Just after booting up there ...
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150 views

no such package beginner tutorials

I'm using Hydro. I am new to this. I was reading the book "A Gentle Intro to ROS" by Jason M. O'Kane. I got up to the section "Creating a package". I was following the "create a workspace" and ...
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1answer
31 views

Backup function

I am attempting to make a function that you provide it a file name, it then make a back up of the file and slaps on a time stamp to mark the file. Once it time stamps the file it prints out all files ...
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2answers
50 views

How can I make DNSMASQ bindings in human readable format?

I want to setup an alias or a script that will allow me show the DHCP bindings dnsmasq has. $ cat /var/lib/misc/dnsmasq.leases 1411349054 08:11:96:e9:52:ec 192.168.1.96 W11837894 * 1411413528 ...
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1answer
3k views

when building u-boot /bin/bash: arm-none-linux-gnueabi-gcc: command not found

I am currently running Ubuntu 12.0.4 on a 64 bit machine. I have an AM335X development board. Along with the kit came the compressed kernel (linux 3,2), rootfs, u-boot, and ARM cross compiler ...
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1answer
44 views

bashrc script not accepting space in directory name

I have added a variable at the end of my ~/.basrc file : export xyz = /home/faizal/DEV/ADT workspace/xyz But if i open a new terminal, i get the error : bash: export: 'workspace/xyz': not a valid ...
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1answer
58 views

Make password appear censored in bash script

I am going to make this short and simple. I am making a bash script where the user needs to enter their root password using the read command and it will be stored in a variable. What I don't like is ...
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2answers
102 views

What is wrong with this script?

So I got this script from this guide: www.tldp.org/LDP/abs/abs-guide.pdf LOG_DIR=/var/log ROOT_UID=0 LINES=50 E_XCD=86 E_NOTROOT=87 if [ "$UID" != "$ROOT_UID" ] then echo "Must be root to run this ...
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4answers
9k views

What does /dev/null mean in a shell script?

I've started learning bash scripting by using this guide: http://www.tldp.org/LDP/abs/abs-guide.pdf However I got stuck at the first script: cd /var/log cat /dev/null > messages cat /dev/null ...
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1answer
56 views

How to find a Window which should be visible on Ubuntu 14.04

In Ubuntu 14.04 I have Keepass2 in my Launchbar. I do execute Keepass and I can see it is executing by a small arrow. With statement : ps - fu bernard | grep keepass2 results into : bernard 2433 ...
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46 views

File Mod Date in ISO?

I want to return a file modification date in a BASH script, in ISO format (YYYY-MM-DD) What shell command will get the modification timestamp, similar to how filemtime does in PHP?
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3answers
79 views

How do I manage changing users in a charm?

I'm writing a charm in which I need to change user to install some packages. When I start juju-deploy all this running as root... So, I try to change my user and is not possible. If anyone has any ...
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1answer
930 views

Running a .bash file in Eclipse

I know this is really an Eclipse issue but I can't seem to login in their forum. I am running eclipse juno for some c/c++ development.However, I wrote a .bash script that initiate the entire ...
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1answer
52 views

Bash searches for inexistent directories upon opening terminal

I tried to install IRAF a couple weeks ago but I couldn't get it to work so I ended up uninstalling the whole thing. Ever since, whenever I open my terminal I get this: bash: ...
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disable all hotkeys with dconf-editor

I'm building a deb package that will create a kiosk user account. When you login to this account, the browser automatically starts and navigates to a pre-given website. Also all the hotkeys should be ...
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3answers
543 views

What is the $BASH_COMMAND variable good for?

According to the Bash manual, the environment variable BASH_COMMAND contains The command currently being executed or about to be executed, unless the shell is executing a command as the result of ...
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1answer
120 views

Is there a way to mirror directory changes in Terminator?

I'm on Ubuntu 12.04 and am using Terminator as my primary terminal. I like it because it lets me keep a python interpreter and bash terminal open at the same time, in the same view. What is annoying ...
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1answer
327 views

how to concatenate two strings in shell script in 3.13.0-34-generic kernel

I want to concatenate two strings for the shell file im getting error when i have created the shell file in following manner could you please suggest how to get it set export ...