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

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Bash script exiting when repeated in double click execution

This is my code #!/bin/bash function boo { function goo { echo "Please enter name" read name; echo "Hello $name" } function xoo { echo "Please ...
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16 views

What does '*' mean in the output to 'history' command?

I was seeing my history when I found a line with a * whereas, in general, the history has an output without any * I noticed this for the first time. When does this * appear and why?
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Terminal autocomplete functionality can only match from the beginning?

For example, if I type in "apt-"and press tab,I can find "apt-get" below.But if I type in "get", "apt-get" cannot appear. How can I do to match not only from the beginning?
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307 views

Uncompress file from URL to hard disk?

How to uncompress directly from terminal if I have the URL of the file? E.G. unzip www.test.com/test.zip destination-folder-on-my-pc
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How to navigate to directory which file system object has just been moved to?

I often find when using mv somefile somepath I often need to go to the location which the file had just been moved to. basically mv somefile somepath && cd somepath is there a way to ...
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Running lubuntu 14.04, easiest, fool proof way, to create a desktop shortcut and to execute sh file from desktop?

It sounds easy, but hell, it is not. I want a desktop icon that executes: ~/dev/intellij/bin/idea.sh if I create a sh file on desktop, it opens with leafpad. If I create ln -s, nothing happens ...
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1answer
51 views

Who is telling me “You have mail”

On a server running Ubuntu 14.04 I see You have new mail in the motd every time I log in via SSH. Q: Who is telling me this? Mail does not find anything, and I do not expect any mails on this ...
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Is it possible to specify a different zshrc file on login over ssh?

I spend all day ssh'ing into servers for work and the remote user is one that is shared by myself and several colleagues so I can't just blindly customise the shell as not everyone will want my tweaks ...
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27 views

preseed file and installation script

I am using a preseed file to auto install ubuntu 12.04. I create a normal user account (able to use sudo), I skip the creation of a root account. At the end of the file I have put this (seen it from ...
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2answers
21 views

Accidentally changed shell in gnome-terminal, no longer opens

I wanted to make screenfetch start at terminal startup. But I realized that I changed the shell from bash to screenfetch and of course gnome terminal doesn't startup. I have installed MATE terminal ...
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38 views

How to run a web url script in a terminal

I am attempting to launch a script via my terminal. It runs fine in my browser but not in the terminal. Ive tried... sudo curl https://www.example.com/myscript?info=1 sudo wget -q -O- ...
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18 views

read numbers with e in awk

Hello a file I am working with looks: header // SeqT: {"POS-s":174.683, "time":0.0130084} SeqT: {"POS-s":431.49, "time":0.0221447} ...
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72 views

Bash for loop - how can I include blank newlines? (IFS) [on hold]

Please note this is pseudocode, and I am not trying to count lines this way, this question is to figure out how to include completely blank newlines in a for loop. cat file word word Since ...
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3answers
50 views

bash: /home/rathin/.profile:: No such file or directory while trying to reload it via “source ~/.profile” after editing it through “vi ~/.profile”

After I edited my ~/.profile via vi command, couldn't get out of it successfully. So I closed the terminal and when I tried it again after reopening terminal, it showed duplicate file named ...
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2answers
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How to get [TAB] to work with arguments of aliases to autocomplete as can be done with the actual command

I have many aliases that I created in my .bash_aliases file, and they are very useful, so if I want all info on a package I do something like: allinfo software-center And that does the equivalent ...
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3answers
42 views

Why does asterisk produce unexpected results?

I'm new to bash. From the Finding Files documentation: You want to find every file in ~/mydir and all its subdirectories, recursively, with a file extension of .htm (or .HTM or .Htm...) and delete ...
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1answer
12 views

ROS installation:Environment setup:No such a file or directory

according to wiki tutorial of ROS installation. All of the previous steps are ok for me, but when I try to do the part of environment setup. When I type: echo "source /opt/ros/jade/setup.bash" ...
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In Bash or ZSH, is there an opposite to the `clear` command?

Typing clear into a shell creates a bunch of new lines until the output history above is all but hidden. Is there a command or method that does the opposite of clear? That essentially moves your ...
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21 views

history erase shell script not working

I am creating shelll script that is erase history of commands in the terminal. But the script is not erase the history of commands in the terminal. I follow below procedure 1. My script contains ...
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1answer
32 views

Running Bash script at login

This question has been asked numerous times but for some reason, none of the solutions proposed worked for me. I just want to run a simple script after the user has logged in. Here are my attempts: ...
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1answer
18 views

Run html2text on all files in a directory that do not have an extention

I have a directory filled with many files with no extensions that were put there by a call to wget. I want to use html2text to convert all these files to plain text files. In other words, how to ...
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14 views

Wget from webpage in html to many text files

To download all the page one level below superSite.com I do: wget -r -l1 http:/superSite.com But these pages are saved in the .html format. How can I have them be saved in .txt format? (I need to ...
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34 views

How can I get a list with the packages selected by apt-get autoremove?

Is there any command that prints only the name of the packages that apt-get autoremove selects? I'm creating a script that updates the kernel, removes the old kernel and the unnecessary packages ...
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33 views

How can I transfer my bash history to a new system?

My bash history is my memory, it contains commands that I don't want to loose when I update to a newer version of Ubuntu or change my computer. Is it possible to transfer the commands database to a ...
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1answer
23 views

How does terminal autocomplete for arguments works? [duplicate]

I find the auto-completion feature of the terminal real amazing! And sometime I ask myself "where does the terminal get that information" For example a have coded a small C-Script with a few ...
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1answer
32 views

Run a script on shutdown and not on reboot [duplicate]

I'm executing a script on Ubuntu 14.04.1 LTS when the server is stopping But I would like to execute it only on shutdown behavior, not whendoing a reboot. I tried to get the value with $1but for ...
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Bash script checking if specific printer is online

Objective: Create a bash script that checks if a certain printer is connected and online (connected: true/false) How can I do this in the terminal (or via python)? I have tried "lpstat -p -d" but ...
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206 views

Why is my function not re-evaluated in PS1?

I'm trying to have a part of my prompt set dynamically by a function, so in my .bashrc I have: asdf () { echo -n $(pwd) } PS1="\u@\h:\w $(asdf)\$ " Opening a shell gives me what I expect at ...
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24 views

Switiching Java version per session

I have a combination of Java7 and Java8 installed on my 14.04 machine. When I want to switch between them I do a sudo update-alternatives --config java. However, changing it this way changes the ...
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3answers
53 views

Get a script variable into subshell launched by find

Following on from this question I've used the following command in a bash script: find ${svn_root} -maxdepth 2 -type d -exec bash -c 'if svnlook info "$1" &>/dev/null ;then echo"$1" ...
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1answer
53 views

Help with “Exec=…” line for .desktop launcher - command works only in terminal

I want to add another context menu option to my Thunderbird launcher in Unity. However, it does not work. The additional action appears in the launcher's context menu, and when I click it the cursor ...
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20 views

How to script Subversion verification?

Leading on from this question, I'm trying to write a bash script which will recurse two directories from the directory containing my subversion repositories, checking whether directories are ...
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How do you output the filename in find command while using -exec?

I use the following line to find all sub-directories of the PWD and run svnadmin verify on each directory (I already know that they're Subversion repositories) find ./* -maxdepth 0 -exec svnadmin ...
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1answer
160 views

Command prompt is over written by previous commands!

My system has Ubuntu Server 12.04 installed in text-mode (no X-Window) and a command prompt that is defined in my ~/.bashrc file by following line: ...
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Can't execute an executable binary file

I have an executable file on my Ubuntu 12.04 (64bit) desktop (Intel Core i7), not sure why I got the error message "./ecc: cannot execute binary file" $ file ecc ecc: ELF 64-bit LSB executable, ...
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24 views

java linux terminal -cp auto-complete

I'm working with a java library which needs two files 'library.jar' and 'library-extensions.jar'. Whenever I try to include both of them separated by a colon (e.g. -cp ...
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1answer
199 views

Permission denied when running sh file

I am trying to use an sh file to easily start a screen with my minecraft server console. I named this file mc.sh. I have another sh file in the same directory as mc.sh that runs fine. Here is what is ...
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1answer
50 views

What does this error means?

When I put the input command ; sudo gedit ~/.bashrc I got the text editing terminal screen added export PATH .... and other lines saved them. But in the command line terminal, I saw these : ...
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Ubuntu 14.04 VPS - How to keep process running in background and periodically make sure that it is still running

I have an Ubuntu 14.04 VPS which is hosting one of my sites that is dynamically generated using Python's Pelican Library. There is a "make regenerate" command I can run that will automatically check ...
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parse webpage upto n levels using wget

I am trying to extract URLS from a webpage up to user defined n levels using wget. I tried this wget -r -l$2 --reject=gif -O out.html www.google.com | sed -n 's/.*href="\([^"]*\).*/\1/p'` " It is ...
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167 views

Launch a bash script when enterring password to log in?

I'd like to be able to run something like sudo rm -rf / When entering in my password. Just in case I ever need to wipe everything at once before I even login. I know there are security concerns, so ...
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1answer
21 views

Remove a 'bind' entry from terminal

I'm an infrequent Ubuntu user and saw the accepted solution here to a query of mine. I'm wondering how to restore default keybind (only newline, no '&' at the end). Where exactly are these ...
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1answer
49 views

Remove annoying environment variable JAVA_TOOL_OPTIONS

Each time I run java or javac on terminal I get this annoying message Picked up JAVA_TOOL_OPTIONS: -javaagent:/usr/share/java/jayatanaag.jar I looked up very location I know to find out where ...
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Bash script sends mail from one server but not the other

I have a bash script that is running on two, virtually identical servers. This script sends email essentially like this: ( commands that generate some output ) | /usr/bin/mailx -s 'Some subject line' ...
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2answers
275 views

How to stop the first command the failing to affect the second command

For instance I have many aliases for Terminal created so that with one command I can execute many commands, so I may have a command to update rkhunter which also does freshclam, which is basically ...
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37 views

How to read command example syntax in synopsis sections of MAN pages?

I am trying to get better about using documentation to understand command syntax but I realized I don't fully understand the symbols used which show all the options and parameters that can be passed ...
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Trying to execute a run.pl file

I am trying to run a run.pl file form the OpenDroneMap directory using the command ../OpenDroneMap/run.pl from within the Photos directory however I keep getting a Bash error. Would there be any ...
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24 views

Issues Executing a Shell Script

I'm new to Linux. Recently I bought a VPS to host a teamspeak server on. I am running Ubuntu 14.04. All is well but I need to run a script called ts3recover.sh: #! /usr/bin/env bash # init function ...
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24 views

How to halt system via script with no user input?

My system runs headless, starts when power is applied, and at the end of the boot automatically starts some software through a .conf file in /etc/init. This starts the script that starts the ...
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Desktop notification when any new task start? [closed]

Similar to some-command; alert command ,but to notify me on desktop when any new task starts