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• How to check if redis master is OK?

  - by e-satis

  On the documentation, they advice the monitor command. But it has a 50% performance penalty for the whole system, and how should I do that ? Whatching the ouput using SSH until I don't see anything ? Let's say I have 3 servers: 1 with a redis master, 1 with a redis slave, and one with my website querying the redis master. How can I, from my website server, make cleany the decision to fallback to the slave by sending the SLAVEOF NO ONE command ? My first step would be to put some kind of timeout check with a simple ping, just to be sure the server is online. But for redis specifically, I have no clue.

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• heimdal error Decrypt integrity check failed for checksum type

  - by user880414

  when I try to authentication with heimdal-kdc ,I get this error in kdc log : (enctype aes256-cts-hmac-sha1-96) error Decrypt integrity check failed for checksum type hmac-sha1-96-aes256, key type aes256-cts-hmac-sha1-96 and authentication failed!!! but authentication with kinit is correct!! my kerb5.conf is [logging] default = FILE:/var/log/krb5libs.log kdc = FILE:/var/log/krb5kdc.log krb5 = FILE:/var/log/krb5.log [libdefaults] default_realm = AUTH.LANGHUA clockskew = 300 [realms] AUTH.LANGHUA = { kdc = AUTH.LANGHUA } [domain_realm] .langhua = AUTH.LANGHUA [kdc] and when add this line to krb5.conf (in kdc tag) require-preauth = no I get this error krb5_get_init_creds: Client have no reply key

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• Check the disk for problems on Debian Lenny

  - by Equ

  Hi guys! I just bought a VPS hosting with Debian Lenny (I'm new to all this world). I've managed to install and setup everthing I need pretty well. My testing website works fast as expected most of the time, but sometimes it is really slow (response time is about 5-10 seconds). I checked everything and seems that there are may be some disk issues. How can I check the disk for problems/performance? What else could possible cause such a behaviour? Thank you!

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• Is it better to check if file exists before deleting it

  - by Kevin Fegan

  Sometimes when I want to delete a file (from within a script), I will just delete it rather than checking if it exists first. So I do this: $ rm "temp.txt" 2>/dev/null Instead of this: [ -f "temp.txt" ] && rm "temp.txt" I just feel it's a waste of time to go and check if the file exists and return an exit code. So, perhaps it's quicker to do it the first way, especially if most of the time, the file is likely to be present. Are there any other advantages (or downsides) to do it one way or the other? Am I wrong to think it will ever be quicker?

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• Accurate way to check latency between Server ?

  - by Rick

  Hi, First of all, I hope my post are is posted in the right section . Below are something i got confused hope you one can help. My business partner 's IP server are in: Sanjose, CA , and I am looking for a datacenter which give the least latency to that IP. I found 2 . 1st datcenter is in San Francisco, CA . 2nd data center is in Newyork. Then I do the ping from each datacenter to the my partner's IP. 1st datcenter's result: 75ms 2nd datacenter's result: 2ms I 've done multiple time, 2nd datacenter always give better result. Now my question is: Isn't the 1st datacenter suppose to give better result, since their location are closer ? How come the result produce different, what is the accurate way to check latency ? Thanks

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• SQL-Server 2008 : Table Insert and Range Check ?

  - by LB .

  I'm using the Table Value constructor to insert a bunch of rows at a time. However if i'm using sql replication, I run into a range check constraint on the publisher on my id column managed automatically. The reason is the fact that the id range doesn't seem to be increased during an insert of several values, meaning that the max id is reached before the actual range expansion could occur (or the id threshold). It looks like this problem for which the solution is either running the merge agent or run the sp_adjustpublisheridentityrange stored procedure. I'm litteraly doing something like : INSERT INTO dbo.MyProducts (Name, ListPrice) VALUES ('Helmet', 25.50), ('Wheel', 30.00), ((SELECT Name FROM Production.Product WHERE ProductID = 720), (SELECT ListPrice FROM Production.Product WHERE ProductID = 720)); GO What are my options (if I don't want or can't adopt any of the proposed solution) ? Expand the range ? Decrease the threshold ? Can I programmatically modify my request to circumvent this problem ? thanks.

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• TFS 2010 Check-in Policies

  - by Liam

  Currently we have check-in policies that are implemented by installing the TFS 2010 Power Tools on each developer machine. I was wondering if there was a way we could store those policies centrally within the TFS Server itself and push them out to the Developer machines in a group policy fashion without having to install anything additional on the Developer machines as realistically we only want the Power Tools on a couple of people's machines. I can't seem to find any documentation on how to do this or if it's possible so if someone could point me in the right direction I'd be very grateful.

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• check two conditions in two different columns in excel and count the matches

  - by user1727103

  I've trying to create a Error Log to help me analyse my mistakes. So for simplicity, lets assume I have two columns "Type of Question" - with values SC,RC,CR and another column that indicates whether I got this question "right/wrong".Let's assume this is my table: Question No. | Right/Wrong | Question Type | Right | SC | Right | RC | Wrong | SC | Wrong | CR | Right | RC (Pardon my formatting skills). And I want an output table like this Type of Question | Right | Wrong | Total SC | 1 | 1 | 2 RC | 2 | 0 | 2 CR | 0 | 1 | 1 So basically what I want to do is check Column3 for SC using =COUNTIF(C1:C5,"SC"), and return the total number of SC questions, and then outta the SC , I need to find out which are Right.If I know the right and the total I can get the wrong. I have never written a macro so a formula based answer would suffice.

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• Using rspec to check creation of template

  - by Brian

  I am trying to use rspec with puppet to check the generation of a configuration file from an .erb file. However, I get the error 1) customizations should generate valid logstash.conf Failure/Error: content = catalogue.resource('file', 'logstash.conf').send(:parameters)[:content] ArgumentError: wrong number of arguments (0 for 1) # ./spec/classes/logstash_spec.rb:29:in `catalogue' # ./spec/classes/logstash_spec.rb:29 And the logstash_spec.rb: describe "customizations" do let(:params) { {:template => "profiles/logstash/output_broker.erb", :options => {'opt_a' => 'value_a' } } } it 'should generate valid logstash.conf' do content = catalogue.resource('file', 'logstash.conf').send(:parameters)[:content] content.should match('logstash') end end

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• Check SSD stability before returning it as broken?

  - by data_jepp

  I have the Transcend SSD 720 256GB 2,5" 7mm disk. And randomly I get disk IO in utorrent and large files copying to external will fail. I have removed it from my laptop since I need max stability. I use my laptop on exams. How can I really bench/make-it-sweat whilst connected to my desktop? I want to re-create some of the fails as I need proof if I am to return it. Firmware is updated. BIOS on laptop is updated. I could just completely nul the disk and then check for bad sectors, but is there anything else I could use for testing? Edit: It has 7 bad sector replacement operations. What does it mean?

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• nagios service check

  - by DRH

  I am new to nagios and we have a small issue I need to ask assistance with. Many of the machines that we monitor can go unresponsive for a bit when some very intensive cpu tasks are run. This makes nagios send warnings and alerts while these hosts are busy reporting things like 'ping timeout' or 'zombie processes' and even swap space warnings, but in actuality there is not a problem. Is there a way to configure nagios to not send such alerts, but check x number of times over a period of time and only then send an alert at the end of that time if the server in question has not recovered?. Looking at the commands.cfg file, I see entries like this: define command{ command_name check_local_swap command_line $USER1$/check_swap -w $ARG1$ -c $ARG2$ } How could I modify this example to accomplish what I want above. Thanks

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• RepositoryItemCheckEdit to get value

  - by cstan

  Hi I have a GridView that has a column with RepositoryItemCheckEdit as ColumnEdit. I want to go get the value "True" and "False" once user click on the check box. what event should i use and how to i get the value. please if anyone can help is urgent.

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• Ajax in UserControl

  - by nader

  Hi i have a signup page and i want to check username exists or not with ajax <%@ Control Language="C#" AutoEventWireup="true" CodeFile="Simple.ascx.cs" Inherits="UserControls_Simple" %> ??? ??????: ???? ???? i eant to show label if user exists how can i do that? tnx

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• Checking if subfolders exist linux

  - by laura

  I'm trying to check if a folder has any subfolders without iterating through its children, in Linux. The closest I've found so far is using ftw and stopping at the first subfolder - or using scandir and filtering through the results. Both, are, however, an overkill for my purposes, I simply want a yes/no. On Windows, this is done by calling SHGetFileInfo and then testing dwAttributes & SFGAO_HASSUBFOLDER on the returned structure. Is there such an option on Linux?

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• SQL Server Constraints Across Tables

  - by chama

  I have a SQL Server database with an Apartment table (which has columns FloorNum and BuildingID) and an ApartmentBuilding table (with column NumFloors). Is there any way to set up a constraint (using the SQL Server UI) to check that Apartment.FloorNum is greater than ApartmentBuilding.NumFloors? I tried this: FloorNum > ApartmentBuilding.NumFloors but now I realize that I somehow have to join the columns on the BuildingID, but I have no idea how to do that within a constraint. Thanks for your help!

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• Ensure Oracle row represents a unique timespan

  - by Dan F.

  I have to make a process in Oracle/PLSQL. I have to verify that the interval of time between start_date and end_date from a new row that I create must not intersect other start_dates and end_dates from other rows. Now I need to check each row for that condition and if it doesn't correspond the repetitive instruction should stop and after that to display a message such as "The interval of time given is not correct". I don't know how to make repetitive instructions in Oracle/PLSQL and I would appreciate if you would help me.

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• What happened to the CSS Checker tool?

  - by Kyle Sevenoaks

  I used it before, and was reminded of it when someone asked about a tool to strip unsused CSS from a stylsheet. I went back to the link, but it's gone, what happened to it? Is it gone forever or does anyone know of a backup? Or a similar tool that can still check your CSS against the HTML and strip orphan CSS. Thanks. Link (to broken site for reference).

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• Missing Password check

  - by AAA

  I am using the code below, it checks for empty fields and verifies email, but even if the password is correct it won't login. the password has been inserted with md5 protection, below is the code. I am new to this so please bare with me. Thanks! PHP: session_start(); //Checks if there is a login cookie if(isset($_COOKIE['ID_my_site'])) //if there is, it logs you in and directes you to the members page { $email = $_COOKIE['ID_my_site']; $pass = $_COOKIE['Key_my_site']; $check = mysql_query("SELECT * FROM accounts WHERE email = '$email'")or die(mysql_error()); while($info = mysql_fetch_array( $check )) { if ($pass != $info['password']) { } else { header("Location: home.php"); } } } //if the login form is submitted if (isset($_POST['submit'])) { // if form has been submitted // makes sure they filled it in if(!$_POST['email'] | !$_POST['password']) { die('You did not fill in a required field.'); } // checks it against the database if (!get_magic_quotes_gpc()) { $_POST['email'] = addslashes($_POST['email']); } $check = mysql_query("SELECT * FROM accounts WHERE email = '".$_POST['email']."'")or die(mysql_error()); //Gives error if user dosen't exist $check2 = mysql_num_rows($check); if ($check2 == 0) { die('That user does not exist in our database. <a href=add.php>Click Here to Register</a>'); } while($info = mysql_fetch_array( $check )) { $_POST['password'] = stripslashes($_POST['password']); $info['password'] = stripslashes($info['password']); $_POST['password'] = md5($_POST['password']); //gives error if the password is wrong if ($_POST['password'] != $info['password']) { die('Incorrect password, please try again.'); } else { // if login is ok then we add a cookie $_POST['email'] = stripslashes($_POST['email']); $hour = time() + 3600; setcookie(ID_my_site, $_POST['email'], $hour); setcookie(Key_my_site, $_POST['password'], $hour); //then redirect them to the members area header("Location: home.php"); } } } else { // if they are not logged in <form action="<?php echo $_SERVER['PHP_SELF']?>" method="post"> <table border="0"> <tr><td colspan=2><h1>Login</h1></td></tr> <tr><td>email:</td><td> <input type="text" name="email" maxlength="40"> </td></tr> <tr><td>Password:</td><td> <input type="password" name="password" maxlength="50"> </td></tr> <tr><td colspan="2" align="right"> <input type="submit" name="submit" value="Login"> </td></tr> </table> </form> } Here is the registration code: PHP: // here we encrypt the password and add slashes if needed $_POST['password'] = md5($_POST['password']); if (!get_magic_quotes_gpc()) { $_POST['password'] = mysql_escape_string($_POST['password']); $_POST['email'] = mysql_escape_string($_POST['email']); $_POST['full_name'] = mysql_escape_string($_POST['full_name']); $_POST['user_url'] = mysql_escape_string($_POST['user_url']); } // now we insert it into the database $insert = "INSERT INTO accounts (Uniquer, Full_name, Email, Password, User_url) VALUES ('".$uniquer."','".$_POST['full_name']."', '".$_POST['email']."','".$_POST['password']."', '".$_POST['user_url']."')"; $add_member = mysql_query($insert); After using ini_set function i got to see the error, i am getting this message but not sure what it means: Notice: Undefined index: password in /var/www/domain.com/htdocs/login.php on line 103 Notice: Use of undefined constant password - assumed 'password' in /var/www/domain.com/htdocs/login.php on line 11

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• LSI RAID monitor reports "Consistency Check inconsistency logging disabled"

  - by carlpett

  I have a server with a LSI MegaRAID 9261-8i controller. Recently I started getting alerts like this one: Controller ID: 1 Consistency Check inconsistency logging disabled, too many inconsistencies on VD: 0 Generated on:Sat May 12 04:06:40 2012 SYSTEM DETAILS--- IP Address: 192.168.1.29 OS Name: Windows 7 x64 OS Version: 6.01 Driver Name: megasas.sys Driver Version: 4.5.1.64 IMAGE DETAILS--- BIOS Version: 2.120.33-1197 Firmware Package Version: 12.12.0-0045 Firmware Version: 3.21.00_4.11.05.00_0x05000000 VD 0 is a RAID mirror containing the system disk. I have searched and read, but cannot find any trace of how to actually do anything about this. I tried running a scandisk but that did not find anything (as I expected, since scandisk reads the disks as exposed by the controller, right?). The MegaRAID Storage Manager does not as far as I can see have any options for checking or fixing physical disks. The program claims the VD is "healty", and both disks have Error count 0. Also a bit strange is the System details in the message... The IP address is associated with the RAS (dial in) interface, and the OS should be Windows Server 2011 SBS. Has anyone else experienced this before? What can be done?

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• Disable raid member check upon mount to mount damaged nvidia raid1 member

  - by Halfgaar

  Hi, A friend of mine destroyed his Nvidia RAID1 array somehow and in trying to fix it, he ended up with a non-working array. Because of the RAID metadata, the actual disk data was stored at an offset from the beginning. I was able to identify this offset with dd and a hexeditor and then I used losetup to create a loop device with the proper offset, so that I could mount the partition. It was then that I ran into problems, namely that mount says: "mount: unknown filesystem type 'nvidia_raid_member'". I also had this when trying to mount a Linux MD component the other day, and because I can remember that doing that in the past worked, I surmised that it may be some kind of protection. I therefore booted an old Sysrescue CD and tried it there, which worked (because of the older version of mount/libc/kernel/whatever). I still need to try to get more data, and because I don't want to keep using that SysrecueCD, I'd like to be able to mount the disk on my normal system. So, my question is: can the check for a disk being a raid member be disabled? I guess I could also zero out blocks that look like the raid block, but I'd rather not... I made an image of the disk with par2 data, so it's revertable, but still...

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• .htaccess Permission denied. Unable to check htaccess file

  - by Josh

  I have a strange problem when adding a sub-domain to our virtual server. I have done similar sub-domains before and they have worked fine. When I try to access the sub-domain I get an 403 Forbidden error. I checked the error logs and have the following error: pcfg_openfile: unable to check htaccess file, ensure it is readable I've searched Google and could only find solutions regarding file and folder permissions, that I have checked and the solution isn't solved. I also saw problems with Frontpage Extensions, but that's not installed on the server. Edit Forgot to say that there isn't a .htaccess file in the directory of the sub-domain Edit #2 Still not been able to find a solution on this. Only things I have been able to find out is: It doesn't seem to be a problem with any .htaccess files (I've tried creating blank ones, with correct user privileges). It doesn't seem to be a problem with any folder permissions as they are all set correct. There isn't a problem with the way the sub-domain has been set up, as I've tried pointing the DocumentRoot to another folder and it worked fine. I've also done sub-domains fine before with no problem. Edit #3 Find out more information. I don't think it can be a file permission problem now, because if I access it by going to the server ip and then the directory where the site is hosted it all works fine (minus the stylesheets & images, which is just down to how they are linked)

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• pam debugging "check pass; user unknown"

  - by lvc

  I am attempting to get Prosody authenticating with its auth_pam module. It is configured to use the pam service name xmpp. The pam.d/xmpp file is copied straight from the one configured for dovecot (originally taken from, I think, dovecot's documentation), which is known to be working: # cat /etc/pam.d/xmpp auth required pam_unix.so nullok debug account required pam_unix.so debug Logging in with dovecot works wonderfully. Logging in with prosody, with exactly the same username and password, causes Prosody to return 'Not authorized', and the following in journalctl -f: Oct 29 22:12:14 riscque.net prosody[9396]: c2s1d010b0: Client sent opening <stream:stream> to riscque.net Oct 29 22:12:14 riscque.net prosody[9396]: c2s1d010b0: Sent reply <stream:stream> to client Oct 29 22:12:14 riscque.net prosody[9396]: [178B blob data] Oct 29 22:12:14 riscque.net unix_chkpwd[9408]: check pass; user unknown Oct 29 22:12:14 riscque.net prosody[9396]: pam_unix(xmpp:auth): conversation failed Oct 29 22:12:14 riscque.net prosody[9396]: pam_unix(xmpp:auth): unable to obtain a password Oct 29 22:12:14 riscque.net prosody[9396]: pam_unix(xmpp:auth): auth could not identify password for [lvc] Oct 29 22:12:14 riscque.net prosody[9396]: riscque.net:saslauth: sasl reply: <failure xmlns='urn:ietf:params:xml:ns:xmpp-sasl'><not-authorized/><text>Unable to authorize you with the authentication credentials you&apos;ve sent.</text></failure> This series of errors seems mutually contradictory - first it says "user unknown", but then that it can't obtain the password for lvc - this username certainly exists on the system. What is likely going on here, and how would I debug this further?

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• Ubuntu 13.04 to 13.10: Filesystem check or mount failed [migrated]

  - by SamHuckaby

  I attempted to upgrade from Ubuntu 13.04 to 13.10 today, and mid upgrade the system started flaking out, and eventually locked up entirely. I was forced to restart the computer, and am now unable to get the computer to boot up at all. When I boot currently, it takes me to the GRUB menu, and I can choose to boot normally, or boot in an older version. I have tried several things, which I list below, but no matter what, when I try to finish booting into Ubuntu, I receive the following error: Filesystem check or mount failed. A maintenance shell will now be started. CONTROL-D will terminate this shell and continue booting after re-trying filesystems. Any further errors will be ignored root@ubuntu-computername:~# I have fun fsck -f and everything appears correct, no errors are reported. and it passes all 5 checks. If I run fdisk -l then I get the following information: Disk /dev/sda: 320.1 GB, 320072933376 bytes 255 heads, 63 sectors/track, 38913 cylinders, total 625142448 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 4096 bytes / 4096 bytes Disk identifier: 0x00010824 Device Boot Start End Blocks Id System /dev/sda1 * 2048 608456703 304227328 83 Linux /dev/sda2 608458750 625141759 8341505 5 Extended Partition 2 does not start on physical sector boundary. /dev/sda5 608458752 625141759 8341504 82 Linux swap / Solaris Disk /dev/sdb: 320.1 GB, 320072933376 bytes 255 heads, 63 sectors/track, 38913 cylinders, total 625142448 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x0fb4b7e8 Device Boot Start End Blocks Id System /dev/sdb1 8192 625139711 312565760 7 HPFS/NTFS/exFAT I am considering just installing a new OS on the other disk, that currently has nothing on it, and then just attempting to scrape my data off the old disk (thankfully I didn't encrypt the files). Really my question is this: Can I salvage this Ubuntu install, or should I give up and just reinstall?

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• How to check DVD integrity at max read speed of DVD writer

  - by ashishsony

  I need to check the integrity of burned DVDs so that I can be sure about my backed-up data. I use DL-DVDs to take the backup. Earlier I used VSO Inspector software for the same but the day I switched to DL-DVDs the VSO Inspector gives me errors upon checking. I think the errors are because the switching of layer writing involves some dummy data somewhere. Secondly, it's damned slow for checking. I believe if there is a utility that can read all files (not the disk surface) and report if some files are unreadable would do the job. But it should be quick! Nobody wants to sit for disk checking for 3-4 hours after a quick 30 min data burn! I am looking for such a utility on Windows or Linux. Even scripts (python, etc) will do. I just want to be assured that the data is safe. Can someone help me in this? Thanks.

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• pcfg_openfile: unable to check htaccess file, ensure it is readable

  - by rxt

  After moving a website folder on my local development machine to another drive, then moving it back, I got a 403 error. Most of this problem had probably to do with rights that got messed up. After deleting the code and restoring it from SVN, the rights seemed allright. The error stayed however. The setup is a bit complex, as follows: I have Ubuntu 10.4 as development machine, trying to mimic the server as much as possible We use Eclipse + SVN and I create all projects in a local folder under my user account In /var/www-vhosts I create folders for each vhost, like this one: test.localhost test.local/index.php: includes the index file of the project test.local/.htaccess is a dynamic link to the htaccess file in a project subfolder I get the following error in the apache error log: [Thu Jul 08 15:55:56 2010] [crit] [client 127.0.0.1] (13)Permission denied: /var/www-vhosts/test.localhost/.htaccess pcfg_openfile: unable to check htaccess file, ensure it is readable The problem seems to be the .htaccess file, or the link to it. When I empty the htaccess, nothing changes When I remove the link, the index-include produces some output (in the apache error log) When I remove the link and replace it with the actual file, I get another error: [Thu Jul 08 16:47:54 2010] [error] [client 127.0.0.1] Symbolic link not allowed or link target not accessible: /var/www-vhosts/test.localhost/test I'm lost here, don't know what to do next. Do you have any ideas what I can try? This setup has worked before, but I don't know what is different now.

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