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  • Korn shell wraparound

    - by allenratcliff
    Okay, I'm sure this is simple but it is driving me nuts. I recently went to work on a program where I've had to step back in time a bit and use Redhat 9. When I'm typing on the command line from a standard xterm running Korn shell, when I reach the end of the line the screen slides to the right (cutting off the left side of my command) instead of wrapping the text around to a new line. This makes things difficult for me because I can't easily copy and paste from the previous command straight from the command line. I have to look at the history and paste the command from there. In case you're wondering, I do a lot of command-line awk scripts that cause the line to get quite long. Is there a way to force the command line to wrap instead of shifting visibility to the right side of the command I'm typing? I've poured through man page options with no luck. I'm running XFree86 4.2.99.903(174) and KSH 5.2.14. Thanks.

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  • Linux - How do i know the block map of the given file and/or the free space map of the partition.

    - by Inso Reiges
    Hello, I am on Linux and need to know either of the two things: 1) If i have a regular file on some file system on a partition under Linux is there a way to know the set of the physical blocks that this file occupies on the drive from user space? Or at least the set of the file system's clusters? 2) Is there a way to get the same information about the whole free space of the given file system? In both cases i understand that if there is any possible way to extract this info it will probably be totally unsafe and racy (anything could happen to these set of blocks between the time i see them and act on them somehow). I also really don't want an implementation that will have to know a lot about every filesystem.

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  • How to stop the execution of Java program from Command line?

    - by Aakash
    My main field is .Net but recently I have got something to do with Java. I have to create a shell utility in Java that could run in background reading few database records after specified duration and do further processing. It's a kind of scheduler. Now I have few concerns: How to make this work as a service. I want to execute it through a shell script and the utility should start running. Off course the control should get back to the calling script. Secondly, eventually i may want to stop this process from running. How to achieve this? I understand these are basic question but I really have no idea where to begin and what options are best for me. Any help / advise please?

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  • C++ Beginner - Best way to read 3 consecutive values from the command line?

    - by Francisco P.
    Hello everyone, I am writing a text-based Scrabble implementation for a college project. The specification states that the user's position input must be read from single line, like this: Coordinates of the word's first letter and orientation (<A – P> <1 – 15> <H ou V>): G 5 H G 5 H is the user's input for that particular example. The order, as shown, must be char int char. What is the best way to read the user's input? cin >> row >> column >> orientation will cause crashes if the user screws up. A getline and a subsequent string parser are a valid solution, but represent a bit of work. Is there another, better, way to do this, that I am missing? Thanks for your time!

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  • How to make System command calls in Java/Groovy?

    - by Zombies
    What I want to do is invoke maven from a groovy script. The groovy script in question is used as a maven wrapper to build J2EE projects by downloading a tag and invoking maven on what was downloaded. How should I accomplish invoking maven to build/package the EAR (the groovy script is already capable of downloading the tag from SCM).

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  • How do I compile on linux to share with all distributions?

    - by Andrew M
    I compiled a PHP extension on Fedora Core 12, but when I send it to someone using CentOS they get the error: "ELF file OS ABI invalid" I'm not sure what causes this running file provides the following info: ELF 64-bit LSB shared object, AMD x86-64, version 1 (GNU/Linux), not stripped An extension that loads fine provides the following from file: ELF 64-bit LSB shared object, AMD x86-64, version 1 (SYSV), not stripped So it seems I need to generate a SYSV type file for some distributions, instead of a GNU/LINUX file, no idea how though. Any pointers? Also should I be statically linking?

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  • Having trouble reading XML file from Windows server. Works on Linux

    - by DuFF14
    I'm parsing an XML file in an android app. My success varies depending upon where the file is hosted. After hosting the file on 4 different servers (2 Linux, 2 Windows), I discovered that when the xml is hosted on a Linux server, the app works. When it's hosted on a Windows server, I am unable to parse correctly. Instead of reading the expected xml tags, it reads HTML tags (, , , etc). I'm not sure why it doesn't work on Windows servers, or if that is even the issue and not just a coincidence. Any help is appreciated. Thanks. Here is my code: private void getXmlData() { HttpClient httpclient = new DefaultHttpClient(); String url = XML_URL; HttpPost httppost = new HttpPost(url); HttpResponse response = httpclient.execute(httppost); SaxParser saxParser = new SaxParser(response); parsedXML = saxParser.parse(); }

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  • Linux binary built for 2.0 kernel wouldn't execute on 2.6.x kernel.

    - by lorin
    I was installing a binary Linux application on Ubuntu 9.10 x86_64. The app shipped with an old version of gzip (1.2.4), that was compiled for a much older kernel: $ file gzip gzip: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.0.0, stripped I wasn't able to execute this program. If I tried, this happened: $ ./gzip -bash: ./gzip: No such file or directory ldd was similarly unhappy with this binary: $ ldd gzip not a dynamic executable This isn't a showstopper for me, since my installation has a working version of gzip I can use. But I'm curious: What's the most likely source of this problem? A corrupted file? Or a binary incompatibility due to being built for a much older {kernel,libc,...}?

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  • How do you debug c/c++ source code in linux using emacs?

    - by vmihai
    Hello all, I am using emacs and autotools, to write and compile c/c++ sources on linux. I am using gdb via GUD in emacs. I have defined for convenience: F7:compile, F10:gud-next, F11:gud-step, F5:gud-cont, F9:gud-tbreak, F8:gud-until, F4:gud-print. I am mainly interested in debugging c/c++ source code on linux from emacs and I would like to get the most gdb can give. Unfortunately I am using only F4 which prints the variable under cursor. So my question is how do you guys debug the source code ? What programs do you use ? What key bindings (functionality) do you use mostly ? What do you need the debugger to do for you ? If you do weird stuff it doesn't matter. I would like to know everything to boost my speed a bit here. Thanks in advance. Mihai

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  • Is there a way to set up a Linux pipe to non-buffering or line-buffering?

    - by ern0
    My program is controlling an external application on Linux, passing in input commands via a pipe to the external applications stdin, and reading output result via a pipe from the external applications stdout. The problem is that writes to pipes are buffered by block, and not by line, and therefore delays occur before my app receives data output by the external application. The external application cannot be altered to add explicit fflush() calls. When I set the external application to /bin/cat -n (it echoes back the input, with line numbers added), it works correctly, it seems, cat flushes after each line. The only way to force the external application to flush, is sending exit command to it; as it receives the command, it flushes, and all the answers appears on the stdout, just before exiting. I'm pretty sure, that Unix pipes are appropiate solution for that kind of interprocess communication (pseudo server-client), but maybe I'm wrong. (I've just copied some text from a similar question: Force another program's standard output to be unbuffered using Python)

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  • Is there a single Git command to get the current tag, branch and commit?

    - by Koraktor
    I'm currently using a collection of three commands to get the current tag, branch and the date and SHA1 of the most recent commit. git describe --always --tag git log -1 --format="%H%n%aD" git rev-parse --abbrev-ref HEAD Which will output something like: 1.2.3-gdeadbeef deadbeef3b8d90071c24f51ac8f26ce97a72727b Wed, 19 May 2010 09:12:34 +0200 master To be honest, I'm totally fine with this. But I'm using these commands from Maven and anyone who'd used Maven before, knows how much things like external commands bloat the POM. I just want to slim down my pom.xml and maybe reduce execution time a bit.

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  • How do I convert this cURL command to PHP (libcurl)?

    - by Daddy Warbox
    In continuation off of this question, what are the PHP statements I need to accomplish this: curl -is -F 'J:A-login=BTDT::Action::Login' -F 'J:A:F-address-login=EMAILADDRESS' -F 'J:A:F-password-login=PASSWORD' http://hiveminder.com/splash | grep -o 'JIFTY_SID_HIVEMINDER=[0-9a-f]\+' The flags and fields are still mysterious, and I've not the time presently to swim through docs to figure out how this translates. I do at least understand the | grep ... portion, though.

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  • h2 & linux. how to start the database?

    - by David
    sorry im rather new to linux ubuntu. i have an application that i made that runs with tomcat and connects to an h2 database. it all works fine on my windows laptop. im now moving it onto my linux computer to run all the time. but im having trouble with starting the database. i have downloaded h2 from their website. and its sitting on my desktop. the question is. how to start the database. and is their any other commands i need to know to run and operate it. thankyous

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  • How can I make a GUI frontend to a command line tool in OSX?

    - by bfred.it
    I'm dying to know how I can make a GUI for ffmpeg and jhead in OSX. I've been looking for a solution for a while and thought you, stackoverflow's users, could help me. Maybe you know some document I haven't come across of or, better, a tutorial to make a GUI. I love those two tools but I like the simplicity of drag/drop operations. Note: I don't need a GUI for them, I want to make one.

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  • What is your single most favorite command-line trick using Bash?

    - by hoyhoy
    We all know how to use <ctrl>-R to reverse search through history, but did you know you can use <ctrl>-S to forward search if you set stty stop ""? Also, have you ever tried running bind -p to see all of your keyboard shortcuts listed? There are over 455 on Mac OS X by default. What is your single most favorite obscure trick, keyboard shortcut or shopt configuration using bash?

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  • How can I enable a debugging mode via a command-line switch for my Perl program?

    - by Michael Mao
    I am learning Perl in a "head-first" manner. I am absolutely a newbie in this language: I am trying to have a debug_mode switch from CLI which can be used to control how my script works, by switching certain subroutines "on and off". And below is what I've got so far: #!/usr/bin/perl -s -w # purpose : make subroutine execution optional, # which is depending on a CLI switch flag use strict; use warnings; use constant DEBUG_VERBOSE => "v"; use constant DEBUG_SUPPRESS_ERROR_MSGS => "s"; use constant DEBUG_IGNORE_VALIDATION => "i"; use constant DEBUG_SETPPING_COMPUTATION => "c"; our ($debug_mode); mainMethod(); sub mainMethod # () { if(!$debug_mode) { print "debug_mode is OFF\n"; } elsif($debug_mode) { print "debug_mode is ON\n"; } else { print "OMG!\n"; exit -1; } checkArgv(); printErrorMsg("Error_Code_123", "Parsing Error at..."); verbose(); } sub checkArgv #() { print ("Number of ARGV : ".(1 + $#ARGV)."\n"); } sub printErrorMsg # ($error_code, $error_msg, ..) { if(defined($debug_mode) && !($debug_mode =~ DEBUG_SUPPRESS_ERROR_MSGS)) { print "You can only see me if -debug_mode is NOT set". " to DEBUG_SUPPRESS_ERROR_MSGS\n"; die("terminated prematurely...\n") and exit -1; } } sub verbose # () { if(defined($debug_mode) && ($debug_mode =~ DEBUG_VERBOSE)) { print "Blah blah blah...\n"; } } So far as I can tell, at least it works...: the -debug_mode switch doesn't interfere with normal ARGV the following commandlines work: ./optional.pl ./optional.pl -debug_mode ./optional.pl -debug_mode=v ./optional.pl -debug_mode=s However, I am puzzled when multiple debug_modes are "mixed", such as: ./optional.pl -debug_mode=sv ./optional.pl -debug_mode=vs I don't understand why the above lines of code "magically works". I see both of the "DEBUG_VERBOS" and "DEBUG_SUPPRESS_ERROR_MSGS" apply to the script, which is fine in this case. However, if there are some "conflicting" debug modes, I am not sure how to set the "precedence of debug_modes"? Also, I am not certain if my approach is good enough to Perlists and I hope I am getting my feet in the right direction. One biggest problem is that I now put if statements inside most of my subroutines for controlling their behavior under different modes. Is this okay? Is there a more elegant way? I know there must be a debug module from CPAN or elsewhere, but I want a real minimal solution that doesn't depend on any other module than the "default". And I cannot have any control on the environment where this script will be executed...

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  • How do I simulate a progress counter in a command line application in Python?

    - by CRP
    My Python program does a series of things and prints some diagnostic output. I would also like to have a progress counter like this: Percentage done: 25% where the number increases "in place". If I use only string statements I can write separate numbers, but that would clutter the screen. Is there some way to achieve this, for example using some escape char for backspace in order to clear a number and write the next one? Thanks

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  • How do I erase printed characters in a console application(Linux)?

    - by Binny V A
    Hi all, I am creating a small console app that needs a progress bar. Something like... Conversion: 175/348 Seconds |========== | 50% My question is, how do you erase characters already printed to the console? When I reach the 51st percentage, I have to erase this line from the console and insert a new line. In my current solution, this is what happens... Conversion: 175/348 Seconds |========== | 50% Conversion: 179/348 Seconds |========== | 52% Conversion: 183/348 Seconds |========== | 54% Conversion: 187/348 Seconds |=========== | 56% Code I use is... print "Conversion: $converted_seconds/$total_time Seconds $progress_bar $converted_percentage%\n"; I am doing this in Linux using PHP(only I will use the app - so please excuse the language choice). So, the solution should work on the Linux platform - but if you have a solution that's cross platform, that would be preferable.

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  • why number 9 in kill -9 command in unix?

    - by Alby
    I understand it's off topic, I couldn't find anywhere online and I was thinking maybe programming gurus in the community might know this. I usually use kill -9 pid to kill the job. I always wondered the origin of 9. I looked it up online, and it says "9 Means KILL signal that is not catchable or ignorable. In other words it would signal process (some running application) to quit immediately" (source: http://wiki.answers.com/Q/What_does_kill_-9_do_in_unix_in_its_entirety) But, why 9? and what about the other numbers? is there any historical significance or because of the architecture of Unix? Thanks!

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  • Ask the Readers: Do You Use the Command Line?

    - by Asian Angel
    Most people have heard of it but not everyone is familiar or comfortable with how to use this bastion of geekdom. This week we would like to know if you use the command line or not. The command line…the bastion of ultimate geekery in many peoples’ eyes. You often hear people referring to doing things using the command line, so there must be something to it, right? For some people using the command line is the best, most efficient, and easiest way to do things on their systems. These are the people that many of us wish we were like. Next you have those who are proficient at using the command line but do not rely on it for everything they do on their systems. Then there are people who know how to perform some tasks or hacks using the command line but may not be as comfortable or knowledgeable as they wish to be using it. Moving on you find those who are interested in learning how to use the command line and just need a small push to get started.  Perhaps you feel too intimidated to learn it and just need the right opportunity to come along. And maybe you do not care one way or the other so long as you get done what you want to do on your system. Or you may prefer to simply use a graphical interface since that is quicker and easier for you (along with being familiar). You can find the whole range of people when it comes to using the command line… This week we would like to know if you use the command line or not. What command line category do you fit into? Power user? Casual usage? Totally lost? Let us know in the comments! How-To Geek Polls require Javascript. Please Click Here to View the Poll. Latest Features How-To Geek ETC The How-To Geek Holiday Gift Guide (Geeky Stuff We Like) LCD? LED? Plasma? The How-To Geek Guide to HDTV Technology The How-To Geek Guide to Learning Photoshop, Part 8: Filters Improve Digital Photography by Calibrating Your Monitor Our Favorite Tech: What We’re Thankful For at How-To Geek The How-To Geek Guide to Learning Photoshop, Part 7: Design and Typography Fun and Colorful Firefox Theme for Windows 7 Happy Snow Bears Theme for Chrome and Iron [Holiday] Download Full Command and Conquer: Tiberian Sun Game for Free Scorched Cometary Planet Wallpaper Quick Fix: Add the RSS Button Back to the Firefox Awesome Bar Dropbox Desktop Client 1.0.0 RC for Windows, Linux, and Mac Released

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  • Display particular data into a file

    - by Avinash K G
    I'm new to Ubuntu and have been using it for a couple of weeks now. Recently I encountered a problem where in I had to display a particular data on to a file. Here is the output displayed on the terminal. Potential vulnerability found (CVE-2009-4028) CVSS Score is 6.8 Full vulnerability match (incl. edition/language) File "/usr/sbin/mysqld" (CPE = cpe:/a:mysql:mysql:5.1:::) on host glynis-desktop (key glynis-desktop) Potential vulnerability found (CVE-2009-4030) CVSS Score is 4.4 Full vulnerability match (incl. edition/language) File "/usr/sbin/mysqld" (CPE = cpe:/a:mysql:mysql:5.1:::) on host glynis-desktop (key glynis-desktop) Potential vulnerability found (CVE-2009-5026) CVSS Score is 6.8 Full vulnerability match (incl. edition/language) File "/usr/sbin/mysqld" (CPE = cpe:/a:mysql:mysql:5.1:::) on host glynis-desktop (key glynis-desktop) Potential vulnerability found (CVE-2012-0075) CVSS Score is 1.7 Full vulnerability match (incl. edition/language) File "/usr/sbin/mysqld" (CPE = cpe:/a:mysql:mysql:5.1:::) on host glynis-desktop (key glynis-desktop) Potential vulnerability found (CVE-2012-0087) CVSS Score is 4.0 Full vulnerability match (incl. edition/language) File "/usr/sbin/mysqld" (CPE = cpe:/a:mysql:mysql:5.1:::) on host glynis-desktop (key glynis-desktop) Potential vulnerability found (CVE-2012-0101) CVSS Score is 4.0 Full vulnerability match (incl. edition/language) File "/usr/sbin/mysqld" (CPE = cpe:/a:mysql:mysql:5.1:::) on host glynis-desktop (key glynis-desktop) Potential vulnerability found (CVE-2012-0102) CVSS Score is 4.0 Full vulnerability match (incl. edition/language) File "/usr/sbin/mysqld" (CPE = cpe:/a:mysql:mysql:5.1:::) on host glynis-desktop (key glynis-desktop) Potential vulnerability found (CVE-2012-0112) CVSS Score is 3.5 Full vulnerability match (incl. edition/language) File "/usr/sbin/mysqld" (CPE = cpe:/a:mysql:mysql:5.1:::) on host glynis-desktop (key glynis-desktop) Potential vulnerability found (CVE-2012-0113) CVSS Score is 5.5 Full vulnerability match (incl. edition/language) File "/usr/sbin/mysqld" (CPE = cpe:/a:mysql:mysql:5.1:::) on host glynis-desktop (key glynis-desktop) Potential vulnerability found (CVE-2012-0114) CVSS Score is 3.0 Full vulnerability match (incl. edition/language) File "/usr/sbin/mysqld" (CPE = cpe:/a:mysql:mysql:5.1:::) on host glynis-desktop (key glynis-desktop) Potential vulnerability found (CVE-2012-0115) CVSS Score is 4.0 Full vulnerability match (incl. edition/language) File "/usr/sbin/mysqld" (CPE = cpe:/a:mysql:mysql:5.1:::) on host glynis-desktop (key glynis-desktop) Potential vulnerability found (CVE-2012-0116) CVSS Score is 4.9 Full vulnerability match (incl. edition/language) File "/usr/sbin/mysqld" (CPE = cpe:/a:mysql:mysql:5.1:::) on host glynis-desktop (key glynis-desktop) Potential vulnerability found (CVE-2012-0118) CVSS Score is 4.9 Full vulnerability match (incl. edition/language) File "/usr/sbin/mysqld" (CPE = cpe:/a:mysql:mysql:5.1:::) on host glynis-desktop (key glynis-desktop) Potential vulnerability found (CVE-2012-0119) CVSS Score is 4.0 Full vulnerability match (incl. edition/language) File "/usr/sbin/mysqld" (CPE = cpe:/a:mysql:mysql:5.1:::) on host glynis-desktop (key glynis-desktop) Potential vulnerability found (CVE-2012-0120) CVSS Score is 4.0 Full vulnerability match (incl. edition/language) File "/usr/sbin/mysqld" (CPE = cpe:/a:mysql:mysql:5.1:::) on host glynis-desktop (key glynis-desktop) Potential vulnerability found (CVE-2012-0484) CVSS Score is 4.0 Full vulnerability match (incl. edition/language) File "/usr/sbin/mysqld" (CPE = cpe:/a:mysql:mysql:5.1:::) on host glynis-desktop (key glynis-desktop) Potential vulnerability found (CVE-2012-0485) CVSS Score is 4.0 Full vulnerability match (incl. edition/language) File "/usr/sbin/mysqld" (CPE = cpe:/a:mysql:mysql:5.1:::) on host glynis-desktop (key glynis-desktop) Potential vulnerability found (CVE-2012-0490) CVSS Score is 4.0 Full vulnerability match (incl. edition/language) File "/usr/sbin/mysqld" (CPE = cpe:/a:mysql:mysql:5.1:::) on host glynis-desktop (key glynis-desktop) Potential vulnerability found (CVE-2012-0492) CVSS Score is 2.1 Full vulnerability match (incl. edition/language) File "/usr/sbin/mysqld" (CPE = cpe:/a:mysql:mysql:5.1:::) on host glynis-desktop (key glynis-desktop) Potential vulnerability found (CVE-2012-0540) CVSS Score is 4.0 Full vulnerability match (incl. edition/language) File "/usr/sbin/mysqld" (CPE = cpe:/a:mysql:mysql:5.1:::) on host glynis-desktop (key glynis-desktop) Potential vulnerability found (CVE-2012-0553) CVSS Score is 7.5 Full vulnerability match (incl. edition/language) File "/usr/sbin/mysqld" (CPE = cpe:/a:mysql:mysql:5.1:::) on host glynis-desktop (key glynis-desktop) Potential vulnerability found (CVE-2012-0574) CVSS Score is 4.0 Full vulnerability match (incl. edition/language) File "/usr/sbin/mysqld" (CPE = cpe:/a:mysql:mysql:5.1:::) on host glynis-desktop (key glynis-desktop) Potential vulnerability found (CVE-2012-0583) CVSS Score is 4.0 Full vulnerability match (incl. edition/language) File "/usr/sbin/mysqld" (CPE = cpe:/a:mysql:mysql:5.1:::) on host glynis-desktop (key glynis-desktop) Potential vulnerability found (CVE-2013-1492) CVSS Score is 7.5 Full vulnerability match (incl. edition/language) File "/usr/sbin/mysqld" (CPE = cpe:/a:mysql:mysql:5.1:::) on host glynis-desktop (key glynis-desktop) Potential vulnerability found (CVE-2013-1506) CVSS Score is 2.8 Full vulnerability match (incl. edition/language) File "/usr/sbin/mysqld" (CPE = cpe:/a:mysql:mysql:5.1:::) on host glynis-desktop (key glynis-desktop) Potential vulnerability found (CVE-2013-1521) CVSS Score is 6.5 Full vulnerability match (incl. edition/language) File "/usr/sbin/mysqld" (CPE = cpe:/a:mysql:mysql:5.1:::) on host glynis-desktop (key glynis-desktop) I intend to display the Potential vulnerability found field and the corresponding score alone. There seems to be about 9995 entries and I would like to display all of them. I have been using this command as of now awk '/CVSS Score is/ < /Potential vulnerability found/' output.txt but this seems to display only the name of the vulnerability or the score. How do I display this in file(text,excel) such that all the vulnerability and the corresponding score willbe displayed. Any help would be appreciated Thank you.

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