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• Is it safe to disable nmi_watchdog?

  - by Rayne

  I'm using RHEL 6 (kernel 2.6.32-131) and I'm trying to start oprofile, but I keep getting an error. My oprofile version is 0.9.6-12. I was able to successfully do opcontrol --init But when I did a opcontrol --start --no-vmlinux I got the error Using default event: CPU_CLK_UNHALTED:100000:0:1:1 Error: counter 0 not available nmi_watchdog using this resource ? Try: opcontrol --deinit echo 0 > /proc/sys/kernel/nmi_watchdog I don't know if it's safe for me to do this? For what I googled, it seems that nmi_watchdog is used to reboot the system if it hangs, and that sounds like something I want. Also, grep NMI /proc/interrupts shows a bunch of numbers, which I guess indicates that nmi_watchdog is already running? How can I run both oprofile and nmi_watchdog?

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• Windows Media Player - Media library is corrupted

  - by Badr

  Error: "Windows Media Player cannot play the file because the required video codec is not installed on your computer." Solution applied: 1- "http://support.microsoft.com/kb/926373" 2- Media Library is CORRUPTED on Windows 7. "http://answers.microsoft.com/en-us/windows/forum/windows_7-windows_programs/media-library-is-corrupted-on-windows-7/2afcac17-984b-48fe-98fa-451aa5c085e6" 3- "Windows Media Player cannot play the file because the required video codec is not installed on your computer " 4- "Windows Media Player cannot play the file because the required video codec is not installed on your computer." 5- "How to Reset Windows Media Player to default settings." And non of them fixed the problem. Windows 7 Professional 64-bit - Windows media player 11. Any other solution to fix it?

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• SCCM Client Push FAIL - Win2000 box

  - by ajp

  Hello, When trying to install the SCCM client onto a Windows 2000 box, the install fails. The install script is run through a batch file (CONTENTS: \mdop\SCCM_client\ccmsetup.exe /mp:MDOP /logon smssitecode=MID smsslp=MDOP) hosted on a public area of the network. This script has worked for all machines (mostly Win2003 Server). I've tried enabling all the common services it requires (BITS, IIS Admin, Windows Installer), but it still only runs for a second or two then quits. Here's the piece of the log file where it errors out: [LOG[Couldn't get directory list for directory 'http://MDOP/CCM_Client/ClientPatch'. This directory may not exist.]LOG]! time="13:55:53.618+300" date="06-30-2009" component="ccmsetup" context="" type="0" thread="1676" file="ccmsetup.cpp:6054" Full Log: http://paste-it.net/public/gb11732/

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• Error while installing Xtrabackup

  - by Olin

  I'd like to install XtraBackup (rpm -i percona-xtrabackup-2.1.9-744.rhel6.x86_64.rpm). During the rpm install it told me that it misses a dependency. error: Failed dependencies: perl(DBD::mysql) is needed by percona-xtrabackup-2.1.9-744.rhel6.x86_64 perl(Time::HiRes) is needed by percona-xtrabackup-2.1.9-744.rhel6.x86_64 Then I run yum install perl-Time-HiRes, and yum install perl-DBD-MySQL. For install perl-TImes-Hires has successful but not for perl-DBD-MySQL. Error: file /usr/share/mysql/ukrainian/errmsg.sys from install of mysql-libs-5.1.73-3.el6_5.x86_64 conflicts with file from package MySQL-server-5.6.10-1.el6.x86_64. I also had try to install : yum install cpan cpan DBI cpan DBD::mysql But still get the same error. So I hope someone can explain me what the right fix is, to get XtraBackup running on MySQL.

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• redirection problem for my sites.

  - by redirect-p

  I have a site example.com and another one test.example.com. Both have different configuration file. But when I enter url test.example.com it will redirect to example.com. configuration file for example.com <VirtualHost *:80> ServerName example.com ServerAlias www.example.com DirectoryIndex index.html DocumentRoot my-document-path Options -Indexes ErrorDocument 404 /errors/404.html ErrorDocument 403 /errors/404.html <Location "/"> SetHandler python-program PythonHandler django.core.handlers.modpython PythonPath "['path', 'path'] + sys.path" SetEnv DJANGO_SETTINGS_MODULE example.settings PythonInterpreter example PythonAutoReload On PythonDebug On </Location> </VirtualHost>

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• Nvidia GeForce 410m

  - by user1789927

  I have a Lenovo v570 with a Nvidia GeForce 410m with cuda. It came with windows 7 and everything works well. However I just got bored of windows 7 and I'm yearning for xp. I installed xp and got everything to work except the Nvidia driver. In their website there is only the windows 7 nvidia driver available. I searched http://www.geforce.com/drivers/results/26388 and got a driver for the 400m series. I tried the software and it didn't work, message << THIS GRAPHICS DRIVER COULD NOT FIND COMPATIBLE GRAPHICS HARDWARE . I also tried : http://forums.laptopvideo2go.com/topic/29285-v29610-windows-xp-32bit-nvidia/ This time the error message 'REQUIRED FILES ARE MISSING' Any help will be grateful.

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• How to allow wget to overwrite files

  - by Gnanam

  Using wget command, how do I allow/instruct to overwrite my local file everytime, irrespective of how many times I invoke. Let's say, I want to download a file from the location: http://server/folder/file1.html Here, whenever I say wget http://server/folder/file1.html, I want this file1.html to be overwritten in my local system irrespective of the time it is changed, already downloaded, etc. My intention/use case here is that when I call wget, I'm very sure that I want to replace/overwrite the existing file. I've tried out the following options, but each option is intended/meant for some other purpose. -nc = --no-clobber -N = Turn on time-stamping -r = Turn on recursive retrieving

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• Unable to login to arch linux

  - by Ayodhya

  I am new to archlinux. I am using live usb for archlinux. When I booted it said not a COM32R image. I explored on Google, used Tab and choose have64 and then it booted. Now I am not able to login I used password root but it's not accepting. I also used startx but nothing happened. I am using archlinux-2014.06.01-dual iso downloaded from archlinux website. I see the the following Arch Linux Menu after boot-up Boot Arch Linux (x86_64)(NBD) Boot Arch Linux (x86_64)(NFS) Boot Arch Linux (x86_64)(HTTP) Boot Arch Linux (i686)(NBD) Boot Arch Linux (i686)(NFS) Boot Arch Linux (i686)(HTTP) Boot Existing OS I Choose First one and fourth one (NBD) for live boot and i am having the problem mentioned above.

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• Start script on network connect

  - by Nate Mara

  I am trying to get a GNU/Linux Bash script to run as soon as a network connection is established on my Raspberry Pi. I tried following the instructions on several pages: I have tried adding my script to /etc/network/if-up.d and running sudo chmod ugo+x on the file. I have tried adding the line post-up <path/to/script.sh> to /etc/network/interfaces I am really quite clueless here. More info: The script runs fine when manually run, here it is: http://pastebin.com/UJvt5HYU (I did remove my personal info (email addresses, passwords), but other than that, the script is unchanged. This script also uses the sendEmail program (can be found at http://caspian.dotconf.net/menu/Software/SendEmail/).

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• Apache virtual host proxy to nginx for ruby

  - by Kevin Brown

  I'm running a few php sites off apache and want to start rails dev. I've installed rvm/nginx and can get my ruby site by going to websiteroot.com:8000... How do I pass ruby.websiteroot.com to websiteroot.com:8000? What's the best way for me to route a subdomain for ruby dev?? I'd switch to nginx completely if it weren't for all my php sites--seems like it's easier to just proxy for ruby. Advice? My nginx config looks like this: server{ listen 8000; server_name website.com; root /home/me/sites/ruby_folder/public; ... } My apache config looks like this: <VirtualHost> ServerName ruby.website.com ProxyPreserveHost on ProxyPass / http://127.0.0.1:8000 ProxyPassReverse / http://127.0.0.1:8000 </VirtualHost>

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• Excel hyperlink not redirecting properly (bug?)

  - by Andrej

  I don't know is this is the right place to post this questions, but I have an excel hyperlink problem. Here's the thing. I click on let's say "A1", copy the link in it (http://www.godaddy.com/domains/searchresults.aspx?ci=54814), right click on hyperlink and copy that SAME URL as the link (if it is not automatically detected and changed). When I go to click on it, I am readirected to http://www.godaddy.com/domains/search.aspx?ci=53972. If I copy and paste the link directly into the browser, it works fine. Somebody knows what's going on? Thank you for your time. Andrej

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• Can't add a network printer - Windows 7

  - by r0ca

  Hi all, I have an HP 2600n installed on a SBS2003 server. This printer works fine when I print from the server itself and also from my Windows 7 computer #1. From my Windows 7 #2, it doesn't work. I get the error message that I need to install the driver. The error message is in french but here it the translation. No drivers has been found Windows is unable to find a driver for HP Color Laserjet 2600n on the network. To find a driver manually, click ok. If not, click on cancel and contact your sys adm. I reinstalled from scratch the printer, deleted the driver... Still no luck Any takers?

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• How to uninstall(remove) netintelligence completely?

  - by version hunter

  How to uninstall(remove) netintelligence completely? http://www.versionhunter.com/blog/how-to-uninstall-netintelligence-completely%ef%bc%9f/

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• Pfsense: Inbound Load Balancing https with sticky connection

  - by Zeux

  first of all I'm very sorry for my English... This is my scenario: Internet Firewall+LB: pfsense_1(Active) + pfsense_2(Passive) in CARP Pool servers: 3 x nginx(PHP5+HTTP+HTTPS) Pfsense 1 and 2 CARP configured with Virtual IP (pubblic). Nginx servers's ips are all private. I want to load balance inbound HTTP and HTTPS connections between the 3 nginx web servers. An importat thing is that the HTTPS connections must be "sticky connections": in HTTPS connections, after login by username and password, I setup a php session and therefore when a client starts a HTTPS connection it will be always redirected to the same nginx server, until it disconnects itself, it closes the page/browser or after a timeout (30minutes?) without activity. Is this possible whit the last release(2.0.1) of pfsense? thank you very much...

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• Does the Win XP/7 dual boot "missing restore points" problem apply to systems with separate hard disks for each O/S?

  - by Robert Oschler

  I'm in the process of installing Windows 7/64 on a system with Windows XP/32 on it. During my research, I read about a problem that occurs in the dual boot scenario where Windows XP deletes Windows 7's restore points when it accesses the Windows 7 volume: http://support.microsoft.com/kb/926185 I found a workaround but it seems pretty painful since it appears to involve using the registry to make the Windows 7 volume appear invisible or "offline" to Windows XP, making sharing disk data between the two O/S annoying since you have to use something like an external storage device to get it done: http://www.vistax64.com/tutorials/127417-system-restore-points-stop-xp-dual-boot-delete.html I was wondering if this problem only occurs with systems that have both O/S installed on the same physical hard drive (in different partitions)? In my case, I will have each O/S on a completely separate physical hard drive. Any other tips would be appreciated. -- roschler

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• Cannot access Tomcat application remotely, but can access Apache applications

  - by David Keaveny

  I am installing Atlassian's Confluence 4.2 on a clean Ubuntu 12.04 server. Confluence runs on Tomcat 6, and uses PostgreSQL 9.1 as its datastore. I've installed and configured phpPgAdmin to manage PostgreSQL, and Zentyal to manage the server generally. Both these applications use Apache. The problem that I am experiencing is that while I can access phpPgAdmin and Zentyal without problem from a remote PC, I can only access Confluence when running locally (either specified by localhost, IP address or host name). Instead I get an HTTP 502 Connection Failed error. By way of experimentation, I also installed Ajenti, which appears to use lighttpd rather than Apache or Tomcat, and it too works fine when connected to locally, but gives me the same HTTP 502 error when connected to remotely. So applications served from Apache work fine, but applications served from other services do not - does that ring a bell with anyone? It's been over 10 years since I last sysadmin'ed a Linux box, so I'm more than a little rusty!

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• setting up a basic mod_proxy virtual host

  - by SevenProxies

  I'm trying to set up a basic virtual host to proxy all requests to test.local to a WEBrick server I have running on 127.0.0.1:8080 while keeping all requests to localhost going to my static files in /var/www. I'm running Ubuntu 10.04. I have libapache2-mod-proxy-html installed and I have the module enabled with a2enmod proxy. I also have my virtual host enabled. However, whenever I go to test.local I always get a cryptic 500 server error and all my logs are telling me is: [Thu Mar 03 01:43:10 2011] [warn] proxy: No protocol handler was valid for the URL /. If you are using a DSO version of mod_proxy, make sure the proxy submodules are included in the configuration using LoadModule. Here's my virtual host: <VirtualHost test.local:80> LoadModule proxy_module /usr/lib/apache2/modules/mod_proxy.so ServerAdmin webmaster@localhost ServerName test.local ProxyPreserveHost On # prevents this folder from being proxied ProxyPass /static ! DocumentRoot /var/www <Directory /> Options FollowSymLinks AllowOverride None </Directory> <Directory /var/www/> Options Indexes FollowSymLinks MultiViews AllowOverride None Order allow,deny allow from all </Directory> <Proxy *> Order allow,deny Allow from all </Proxy> ProxyPass / http://localhost:8080/ ProxyPassReverse / http://localhost:8080/ ErrorLog /var/log/apache2/error.log # Possible values include: debug, info, notice, warn, error, crit, # alert, emerg. LogLevel warn CustomLog /var/log/apache2/access.log combined and here's my settings for mod_proxy: <IfModule mod_proxy.c> #turning ProxyRequests on and allowing proxying from all may allow #spammers to use your proxy to send email. ProxyRequests Off <Proxy *> # default settings #AddDefaultCharset off #Order deny,allow #Deny from all ##Allow from .example.com AddDefaultCharset off Order allow,deny Allow from all </Proxy> # Enable/disable the handling of HTTP/1.1 "Via:" headers. # ("Full" adds the server version; "Block" removes all outgoing Via: headers) # Set to one of: Off | On | Full | Block ProxyVia On </IfModule> Does anybody know what I'm doing wrong? Thanks

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• How to install plesk using YUM on centOS 5 ?

  - by Tom

  Hi, i have a vps running centOS 5.4 LAMP and i want to install Plesk panel, so i've installed ART packages using SSH like they said here : http://www.atomicorp.com/channels/plesk/ , i tried to execute : yum install plesk but i got : Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * addons: mirrors.netdna.com * atomic: www5.atomicorp.com * base: yum.singlehop.com * extras: mirror.steadfast.net * updates: www.gtlib.gatech.edu atomic | 1.9 kB 00:00 atomic/primary_db | 425 kB 00:00 Setting up Install Process No package plesk available. Nothing to do Means that no package called "plesk" found. the question is what's the command to install Plesk in my vps or is there another "easy" way to do it, because i'm not really pro in sys administration :) Thanks

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• How do I make kdump use a permissible range of memory for the crash kernel?

  - by Philip Durbin

  I've read the Red Hat Knowledgebase article "How do I configure kexec/kdump on Red Hat Enterprise Linux 5?" at http://kbase.redhat.com/faq/docs/DOC-6039 and http://prefetch.net/blog/index.php/2009/07/06/using-kdump-to-get-core-files-on-fedora-and-centos-hosts/ The crashkernel=128M@16M kernel parameter works fine for me in a RHEL 6.0 beta VM, but not on the RHEL 5.5 hosts I've tried. dmesg shows me: Memory for crash kernel (0x0 to 0x0) notwithin permissible range disabling kdump Here's the line from grub.conf: kernel /vmlinuz-2.6.18-194.3.1.el5 ro root=/dev/md2 console=ttyS0,115200 panic=15 rhgb quiet crashkernel=128M@16M How do I make kdump use a permissible range of memory for the crash kernel?

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• nginx terminates connection after 65k bytes

  - by David Wolever

  I've got nginx configured as a front-end to a Python application running under gunicorn, but nginx is terminating connections after about 65k of data have been sent. For example, I've got a view which looks like this: def debug_big_file(request): return HttpResponse("x" * 500000) But when I access that URL through nginx, I only get 65283 bytes: $ curl https://example.com/debug/big-file | wc … curl: (18) transfer closed with outstanding read data remaining 0 1 65283 Note that everything works as expected when accessing gunicorn directly: $ curl http://localhost:1234/debug/big-file | wc … 0 1 500000 The relevant nginx config: location / { proxy_pass http://localhost:1234/; proxy_redirect off; proxy_headers_hash_bucket_size 96; } And nginx version 1.7.0 Some other facts: The number of bytes is consistent from request to request, but it varies based on the content (I first noticed it with a large PNG file, which was cut off after 65,372 bytes, not 65,283) 110k bytes are sent correctly (ie, "x" * 110000 returns all 110,000 bytes), but 120k bytes are not tcpdump suggests that nginx is sending a RST packet to gunicorn:

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• slow network in centos5 VM with centos5 host running KVM

  - by dan

  I setup KVM following the guide here: http://www.cyberciti.biz/faq/centos-rhel-linux-kvm-virtulization-tutorial/ I setup a bridged network and it worked fine except that the transfer speed is 200KB/s instead of the gigabit speed that I get on the host machine by itself. I tried editing the guest network settings to set "model=virtio" http://wiki.libvirt.org/page/Virtio but this just moves ifconfig-eth0 to ifconfig-eth0.bak in the VM and networking doesn't work at all. I tried moving ifconfig-eth0 back and starting up eth0, which works, but now the transfer speed is ~ 60KB/s I have no idea what else to try. Any suggestions would be greatly appreciated.

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• How can I install things in Linux with *no yum* and *no wget*?

  - by e9t

  I'm a newbie to Linux (that mainly uses Windows and Mac OS X) needing some advice. I was trying to install git on a Linux machine today, and encountered some problems: Not knowing the version of the installed OS, I've opened the /proc/version file which said: Linux version 2.6.9-42.0.2.ELsmp ([email protected]) (gcc version 3.4.6 20060404 (Red Hat 3.4.6-3)) #1 SMP Thu Aug 17 17:57:31 EDT 2006 Then, as written in the git documents (http://git-scm.com/download/linux), I assumed I could use the yum install git command for Fedora, but got the following result. [root@myserver ~]# yum install git -bash: yum: command not found So I tried installing yum using wget, but wasn't so lucky. [root@myserver ~]# wget http://linux.duke.edu/projects/yum/download/2.0/yum-2.0.7.tar.gz -bash: wget: command not found I googled and found this page and this page, so tried installing yum with rpm, but only got a result full of question marks. (Possibly an encoding problem, hmm...) [root@myserver ~]# rpm -Uvh http://www.eomy.net/linux/install-yum-x86_64/wget-1.10.2-0.40E.x86_64.rpm http://www.eomy.net/linux/install-yum-x86_64/wget-1.10.2-0.40E.x86_64.rpm(??)?? ?????? ?: /var/tmp/rpm-xfer.TbuAOu: V3 DSA signature: NOKEY, key ID 443e1821 ???.. ########################################### [100%] wget-1.10.2-0.40E U???????g??????? wget-1.10.2-0.40E???? ??g??/usr/bin/wget ?? wget-1.10.2-0.40E U?????? ???? wget-1.10.2-0.40E???? ??g??/usr/share/man/man1/wget.1.gz ?? wget-1.10.2-0.40E U?????? ???? [root@myserver ~]# Finally, when I typed rpm --version in the terminal, I got the below results. [root@myserver ~]# rpm --version RPM ???? - 4.3.3 I would like to know what I can do or possibly try now. Is it not possible to wget or yum anything in my situation? Or is there any magical tool like homebrew (http://mxcl.github.com/homebrew/) that I can use? Any comments or advice would be appreciated. Thanks in advance!

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• Realtek audio AC 97 5.1 on Windows 7: Terrible subwoofer quality

  - by Edu

  I have a media center PC with on-board Realtek AC97 Audio. I have been using Windows XP for a couple of years with great audio quality. I just upgraded this PC with Windows 7 and installed the latest Realtek drivers from http://www.realtek.com.tw/downloads/ At the testing screen, all the speakers works correctly (including subwoofer). Despite that, while playing any movie or music, the subwoofer quality is terrible. From it it just comes noises, in the correct rhythm but quite low and quite out of tone. I compensated the loudness by putting the other speakers lower but the sound of the subwoofer is really terrible. Is there anyone facing the same problem? Does anyone have a workaround for that? PS.: I had gone past the steps given in Terrible noises from subwoofer of ACER Aspire 6930 with Realtek sound chip but still I have a bad quality of sound. My problem is very similar to the one in http://www.mp3car.com/car-audio/143796-realtek-hd-audio-is-robbing-my-subwoofer.html

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• Filezilla/Puttygen doesn't recognize private key file

  - by devzoner

  I have generated a key for an Ubuntu Virtual Machine running on Azure Cloud Services http://www.windowsazure.com/en-us/manage/linux/how-to-guides/ssh-into-linux/ openssl req -x509 -nodes -days 365 -newkey rsa:2048 -keyout myPrivateKey.key -out myCert.pem When loading the private key into Filezilla, it asks me to convert the format, however, when converting the key it fails, the same happens with puttygen from linux console, using this: puttygen myPrivateKey.key -o myKey.ppk In both cases I have the following error: puttygen: error loading `myPrivateKey.key': unrecognised key type By the way, this key doesn't have a passphrase. I found an old thread about it, but I'm using 0.6.3 version which is newer than what this thread recommends: http://fixunix.com/ssh/541874-puttygen-unable-import-openssh-key.html I've managed to solve this issue by using another gui client Fugu for Mac, but one of my co-worker uses windows and I still have to figure this out. Since Filezilla is the de-facto ftp client, I thought it would be easier to solve it there. Thanks

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• Gre Tunnel Cisco Linux traffic forwarding

  - by mezgani

  I setup a gre tunnel a cisco router and a Linux machine, the tunnel interface in the Linux box named pic. Well i have to forward traffic coming from cisco through the Linux box. the rules i've set in the Linux box is described as follow: echo "1" /proc/sys/net/ipv4/ip_forward iptables -A INPUT -p 47 -j ACCEPT iptables -A FORWARD -i ppp0 -j ACCEPT iptables -A FORWARD -i pic -o ppp0 -m state --state ESTABLISHED,RELATED -j ACCEPT iptables -A FORWARD -i ppp0 -o pic -m state --state ESTABLISHED,RELATED -j ACCEPT iptables -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT iptables -t nat -A POSTROUTING -o ppp0 -j MASQUERADE I see the traffic coming from tunnel and forwarded to internet but no reply from sent packet. May i miss something like a routing rule.

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