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  • Performance Comparison of Shell Scripts vs high level interpreted langs (C#/Java/etc.)

    - by dferraro
    Hi all, First - This is not meant to be a 'which is better, ignorant nonionic war thread'... But rather, I generally need help in making an architecture decision / argument to put forward to my boss. Skipping the details - I simply just would love to know and find the results of anyone who has done some performance comparisons of Shell vs [Insert General Purpose Programming Language (interpreted) here), such as C# or Java... Surprisingly, I have spent some time on Google on searching here to not find any of this data. Has anyone ever done these comparisons, in different use-cases; hitting a database like in a XYX # of loops doing different types of SQL (Oracle pref, but MSSQL would do) queries such as any of the CRUD ops - and also not hitting database and just regular 50k loop type comparison doing different types of calculations, and things of that nature? In particular - for right now, I need to a comparison of hitting an Oracle DB from a shell script vs, lets say C# (again, any GPPL thats interpreted would be fine, even the higher level ones like Python). But I also need to know about standard programming calculations / instructions/etc... Before you ask 'why not just write a quick test yourself? The answer is: I've been a Windows developer my whole life/career and have very limited knowledge of Shell scripting - not to mention *nix as a whole.... So asking the question on here from the more experienced guys would be grealty beneficial, not to mention time saving as we are in near perputual deadline crunch as it is ;). Thanks so much in advance,

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  • How-to get the binding for a tab in the Dynamic Tab Shell Template

    - by Frank Nimphius
    The Dynamic Tab Shell template does expose a method on the Tab.java class that allows you to get access to the ADF binding container for a tab. At least in theory this works, because in practice this call always returns a null value (a bug is filed for this). To work around the problem, you can use code similar to the following to get the ADF binding for a specific tab DCBindingContainer currentBinding = (DCBindingContainer) BindingContext.getCurrent().getCurrentBindingsEntry(); DCBindingContainer templateBinding = (DCBindingContainer)currentBinding.get("ptb1"); DCBindingContainer tabBinding= (DCBindingContainer)templateBinding.get("r"+0);  In the code line above, the tabBinding variable will hold the binding reference to the first tab in the dynamic tab shell template. Note that the tab doesn't need to be visible for this (which has to do with how the template works).  "ptb1" is the template reference name in the PageDef file (Executable section) of the template consumer view. Check this string in your page before using this code. If it differs, change it also in the code above. "r0" is the binding reference of the first tab in the template. Te last tab is referenced by "r14".  

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  • Gnome3 shell video corruption with ATI Radeon HD 4850 on 11.10 Oneiric

    - by AndyAtTheWebists
    I have a problem similar to what's been mentioned in a few other questions, namely: Ati incompatible with Gnome-shell? Gnome Shell Glitched Top Bar Ubuntu 11.10 I have read a number of other posts here and on other forums and have tried a bunch of different solutions. The Problem The problem manifests itself only in Gnome3. I have tried KDE, Unity and KFCE and all are fine. The graphics corruption is visible only on gnome panels (see images below). Everything works fine with the free ATI drivers, but they just lack power. The problem occurs with the proprietary ones from AMD/ATI. I have installed version 11.11 and 12.1 as per the instructions on wiki.cchtml.com/index.php/Ubuntu_Oneiric_Installation_Guide. I have the same exact problem in both cases. I have tried this on clean installs of Ubuntu 11.10 Oneiric Ocelot (x64 and x86) and on Linux Mint 12 (x64) with the same results. Also, it looks like after some time of not using it, the PC just freezes. Maybe an overheat? Will look into it. Things I've Tried I have tried the following fixes: Different versions of drivers from ATI including the latest - this worked for some, not for me. Installing Oneiric specific package generated from driver, as well as the default install Removed the Unity Global menu Disabled file manager handling desktop Disabled Compiz "detect refresh rate" Sync to VBlank in Compiz on and off Please help! This is the first time in 10 years that I've finally had the chance to switch my primary desktop to Linux (stopped doing .NET dev work), and this is really getting me down. This is what the problem looks like: And:

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  • Beginning with shell scripting

    - by Kevin Wyman
    I am fresh into Ubuntu and one of my goals is shell scripting for personal (and maybe public) use. I'm a novice, though I do understand some of the basics (e.g. what a variable, string, loop, etc... is) but to get the most of scripting I need to learn in-depth. I figure the best way to do that is to jump right into scripting and ask questions only pertinent to the stage I am at in my attempted script. Scenario: I have edited my sudoers file to allow my non-root user to run sudo commands without being prompted for a password. Question: In vim, what would be the best code to use for a function that checks whether this condition is [true], If not, prompt the user if they want the script to edit and save the sudoers file to make this condition [true]? Layout - If condition is true, carry-on with rest of script. If condition is not true, the script silently edits/adds the line: %sudo ALL=(ALL:ALL) NOPASSWD: ALL in the sudoers file, saves and then continues on with the next part of the script. Any help with this would be greatly appreciated and assist me in my journey to writing shell scripts.

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  • Why does Ubuntu keep trying to connect to a WiFi network while plugged into an ethernet

    - by labarna
    My desk is situated at the edge of the range of a wireless signal which I use occasionally (when away from my desk) and is therefore saved in network manager. At my desk, however, I plug into the ethernet cable. While I'm working the computer is constantly trying to join the wireless network and usually failing this results in two annoying behaviors. 1: In gnome shell the network connect and disconnect notices keep popping up at the bottom of the screen and I have to click them to make them disappear (I assume it's been fixed in the next version of gnome). 2: (the worst!) Occasionally the wifi password dialog will pop up and ask for the password to this network (which is already saved). An additionally annoyance is that in gnome shell I'll get two copies of the dialog that I have to cancel, one is gnome shell themed (no window border etc...) and the other is just normal gnome themed. (Sometimes if I've been away from the computer for a while I will have multiple copies of this dialog up as its been trying to connect for a while resulting in at times 20 dialogs to cancel). Note, all the while I've been happily connected to the ethernet and have full network access. This is incredibly annoying and distracting, why doesn't ubuntu stop trying to connect to wifi if I'm on the ethernet (unless I want to broadcast my own network, but that's different)?

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  • How to input data into user defined variables into MySql query

    - by user292791
    Simple Shell script echo "Enter 1 for month of March" echo "Enter 2 for month of April" echo "Enter 3 for month of May" read Month case "$Month" in 1) echo "enter establishment name" read a; mysql -u root -p $a < "March.sql";; 2) echo "enter establishment name" read b; mysql -u root -p $b < "April.sql";; 3) echo "enter establishment name" read c; mysql -u root -p $c < "May.sql";; esac done In this i have three other query files March.sql, April.sql, May.sql. i'm linking this in shell script . Example of .sql file: SELECT DISTINCT substr( a.case_no, 3, 2 ), b.case_type, b.type_name, a.case_no into outfile '/tmp/April.csv' FIELDS TERMINATED BY ',' ENCLOSED BY '"' LINES TERMINATED BY '\r\n' FROM Civil_t AS a, Case_type_t AS b, disposal_proc AS c WHERE substr( a.case_no, 3, 2 ) = b.case_type AND a.date_of_decision BETWEEN '2014-04-01' AND '2014-04-30' AND a.case_no = c.case_no AND a.court_no =1; I have to alter the .sql script every time. Is there any method to read the variables from shell script and use it in mysql. For example:- echo "enter date" read a #input date Now i have read a "date" and i want to use it in March.sql query in where clause. Is there is any method of using this variable in .sql query.

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  • How to restart Gnome Shell after a crash short of killing X?

    - by wintercorn
    How can I restart Gnome Shell after a crash? Alt+F2 and restart won't work as the prompt crashed with the shell. Since windows focus is gone along with the shell as well, I can't type gnome-shell --replace in a terminal, either. The Ctr+Alt+F1 command line can't open the X display. So I'm left with killing X, thus loosing all open applications. Is there a keyboard shortcut for restarting Gnome Shell?

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  • How to start Rails from a shell script on Debian?

    - by dsp_099
    I don't really have any need to mess with passenger or capistrano at the moment. I simply want to run rails on boot on port 3000. I've attempted to replicate this tutorial for node as much as I could to run rails: I've a railsup script in /etc/init.d/ that goes something like: #!/bin/sh export PATH=$PATH:/usr/local/bin case "$1" in start) cd /root/rails_app; /usr/local/rvm/gems/ruby-2.0.0-p247/bin/rails server -d -p 3005 ;; # starting other stuff *) I've also included it with update-rc.d I got it to work, but only if I run the script manually - it doesn't seem to run on boot. Is there any reason why ../bin/rails is unavailable on boot? I imagine there's something about ruby path \ rvm \ rails that I'm unaware of? Is there a way to use crontab's @reboot for this?

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  • How to rename a file inside a folder using a shell command?

    - by Leonid Shevtsov
    I have a file at some/long/path/to/file/myfiel.txt. I want to rename it to some/long/path/to/file/myfile.txt. Currently I do it by mv some/long/path/to/file/myfiel.txt some/long/path/to/file/myfile.txt , but typing the path twice isn't terribly effective (even with tab completion). How can I do this faster? (I think I can write a function to change the filename segment only, but that's plan B).

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  • How to make a Shell Script create a copy and terminate itself?

    - by ricedragon
    So far I used trap " call function" 2 fucntion { ./test.sh exit } but it never reaches the exit line and a whole bunch of process piles up any one got any idea? I tried & (bg) but i need to be able to keep doing it , the bg only allows me to do it once The point of it is when i type ctrl C it should terminate the original test.sh but it should also call itself before terminating hence create a new process.

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  • Gnome shell online accounts fails connection

    - by user74364
    i'm using ubuntu 12.04 (gnome shell) and i just setup the "online accounts" with my gmail. problem is, everytime i reboot my computer, it popups " connection to [email protected] has failed". A friend of mine talked to me in google chat and i got notified, so i guess the only part "broken" is the email. Anything i can do to fix it? would be very nice to receive mail notification there. thanks :)

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  • Enabling unattended-upgrades from a shell script

    - by Grant Watson
    I have a shell script to automatically configure new Ubuntu virtual machines for my purposes. I would like this script to install and enable unattended-upgrades, but I cannot figure out how to do so without user interaction. The usual way to enable upgrades is dpkg-reconfigure unattended-upgrades, but of course that is interactive. The noninteractive front end avoids asking any questions at all, and the text front end seems bound and determined to do its I/O with the tty and not with stdin/stdout.

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  • Gnome Shell Thunderbird Mail Notification

    - by Nerdfest
    Does anyone know of a way to get persistent Gnome 3 panel notifications in Gnome 3 in Oneiric? It's one of the few things holding me back from using Gnome 3 regularly. I've actually found a way of moving the notifications from the (usually) hidden bottom bar to the top, but it does not move the Thunderbird icon. The icon also only tends to appear the first time mail is received. I'm very surprised this basic piece of functionality doesn't exist for Gnome Shell.

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  • Desktop Fun: Ghost in the Shell Wallpaper Collection

    - by Asian Angel
    Motoko Kusanagi, Batou, and the rest of Section 9 usually have their hands full keeping Japan safe from those who would wreak havoc upon it and its citizens. Step into the Japan of tomorrow and add some spirit to your favorite machine with our Ghost in the Shell Wallpaper collection. How to Stress Test the Hard Drives in Your PC or Server How To Customize Your Android Lock Screen with WidgetLocker The Best Free Portable Apps for Your Flash Drive Toolkit

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  • Weird graphical issues with Gnome Shell in 12.10

    - by Chintan Parikh
    I finally got Gnome Shell working on Ubuntu 12.10, but there are some weird graphical issues. It seems as if the text is corrupted or something. Here's a screenshot of what I'm talking about: http://i.imgur.com/OqGyl.png It happens on a bunch of different applications, but not when I'm using Ubuntu. Does anyone know why or how to fix it? My graphics card is an AMD Radeon HD 6540G2, and I'm using the open source drivers (fglrx doesn't work with 12.10 yet).

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  • read file in shell script

    - by moata_u
    how can i read file in shell script , then assign each line to an variable that i can use later ,,,(am thinking in way to load an default setting from file) i already try : process (){ } FILE='' read -p "Please enter name of default file : " FILE if [ ! -f $FILE ]; then echo "$FILE : does not exists " exit 1 elif [ ! -r $FILE ]; then echo "$FILE : can not read " fi exec 0<"$FILE" n=0 while read -r line do (assign each line to an variable) done

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  • Is there an Eclipse plugin to run system shell in the Console?

    - by Fernando
    Do you know of any Eclipse plugin to run a system shell in the included console? It would be awesome. Dolphin, KDE's file navigator, has this feature, you can press F4 and a console shows located on the directory you are standing. It would be awesome to have a similar feature on Eclipse, with the shell located on the directory of the project/file you are working on. Does this plugin exist? If not, would it be too complicated to code such a plugin? I have no idea about eclipse plugin development (yet).

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  • In a process using lots of memory, how can I spawn a shell without a memory-hungry fork()?

    - by kdt
    On an embedded platform (with no swap partition), I have an application whose main process occupies most of the available physical memory. The problem is that I want to launch an external shell script from my application, but using fork() requires that there be enough memory for 2x my original process before the child process (which will ultimately execl itself to something much smaller) can be created. So is there any way to invoke a shell script from a C program without incurring the memory overhead of a fork()? I've considered workarounds such as having a secondary smaller process which is responsible for creating shells, or having a "watcher" script which I signal by touching a file or somesuch, but I'd much rather have something simpler.

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  • Export environment variable from PHP, for use by exec()'d shell command?

    - by anonymous coward
    Somewhat similar to http://stackoverflow.com/questions/2002970/export-a-variable-from-php-to-shell, but my problem is different. I am forced to work with a program that gets an important location variable from an Environment Variable (Linux), rather than a config or, better, a command line option. I have to call this program from within PHP, and currently am doing it like so: shell_exec('/path/to/program option1 option2'); I need to be able to set/override the environment variable that program will be looking for. As an example, this does not work: shell_exec('VAR1=foo /path/to/program option1 option2'); nor does: shell_exec('VAR1=foo; export foo; /path/to/program option1 option2'); for good measure. Both of the above command lines work "as expected" from the shell. Is it possible to override environment variables for programs called via exec, shell_exec, etc?

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