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• Windows 7 + Bind on Ubuntu - DNS keeps stopping

  - by fistameeny

  I have a Bind DNS server running from Ubuntu 12.04 LTS Server 64 bit. In there, I've setup some local A records for internal websites, e.g. wiki.domain.local. Everything works fine, except that every so often (a few times a day), the DNS stops responding on client machines (running Windows 7). The only way I've found to fix it is to stop/start the dnscache service on the Windows machine. Sometimes if I just wait for a few minutes, the DNS will start to work again. I've checked the Windows event log and can't see anything relevant. I've also had a look in the Bind logs and can't see anything there. Has anyone experienced this before?

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• CentOS 5.5 Package documentation

  - by fthinker

  Usually when I install a common package like PostgreSQL or MySQL or Python etc using Yum it installs the files held within those packages into locations specific to CentOS itself. It may also install scripts specific to CentOS only. These paths may not be the same as the defaults found within the source distributions found on the PostgreSQL, MySQL, Python etc project websites and the scripts are usually unique to CentOS. Recently when I installed PostgreSQL under Ubuntu I found some very nice distribution specific information about how the install was organized and how to use the package in a Ubuntu way. I found this information in /usr/share/doc/ Is there any such information included within CentOS?

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• Debug unstable Apache server under Debian

  - by almo

  Since yesterday my Apache server that runs on a Debian machine runs very unstable. Sometiems my websites load and sometimes not. I think it has to do with the memory since my Apache log is full of Out of memory (allocated 262144) (tried to allocate 4480 bytes). I also attached a screenshot of the memory graph. A server restart resolves the problem temporarily. I looked at the processes that are using memory but the biggest one is MySQL with 6.5%. Where else can look for the problem? Edit: I did a free -m right after rebooting and one about 2 hours later. I think the trend is visible: root@xxx:~# free -m total used free shared buffers cached Mem: 4016 731 3284 0 80 200 -/+ buffers/cache: 449 3566 Swap: 459 0 459 root@xxx:~# free -m total used free shared buffers cached Mem: 4016 2466 1550 0 92 473 -/+ buffers/cache: 1900 2115 Swap: 459 0 459

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• Which simple server virtualization solution to use?

  - by vvanscherpenseel

  For one part of our hosting platform we are currently using VMware Server 2 to create two virtual machines on one physical machine. One VM is used for hosting of small websites, the other VM is used as a staging environment. Both the host OS and guest OSes run CentOS Linux. Support for VMWare Server 2 has been discontinued and we are currently looking for a replacement. We only use basic functionality (we don't use snapshots, moving around VMs to different physical machines, or other 'advanced' functionality'). Just a box, with two VMs. We are looking for a virtualization solution that has long-term support, is stable and allows configuration/management from Mac OSx (I understood that Xen only has a Windows client). What would be the right solution for us?

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• How do i set a (open_)basedir with php using fastcgi/nginx?

  - by acidzombie24

  Essentially i found out you can limit the folders each user has access to by using php's basedir/open_basedir. I'd like to have each php only access its own files. So i wrote fastcgi_param open_basedir $document_root; in hopes that it would work. It didnt. I googled and only found results saying you cant do it via fastcgi or nginx. Is this true or can i not do it? PS: I -do- spawn php as its own user (rather then www-data) so it doesnt wreak havoc on my nonphp websites. But i still like to prevent one php script on a php site from accessing other directories (if i have a wordpress install on yourface.com its pretty obvious a valid php path is /var/www/yourface/<wordpress scripts>

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• How can I tell if my live web-server is overloaded?

  - by Nick G

  We have a live webserver which doesn't seem to be performing all that well. It's a Dell PowerEdge machine, a few years old (dual core, 4GB) which is hosting about 20 low-traffic websites. However it doesn't seem to be as fast as it used to be. How can we determine the cause of this? If it's website traffic, I would be expecting high CPU but CPU usage is quite low and hovers around the 15-30% mark except for very brief periods. I'm wondering perhaps, if rather than CPU performance being a problem, perhaps it's disk thrashing due to the constant read/writes of all the small web files and database queries. It has 4x 7200 RPM SATA drives in RAID 5. So is there a way to check that it's not disk thrashing?

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• APC has no system cache entries

  - by lazzio

  I have 2 web servers to provide PHP websites. One server is : Apache + PHP-FPM + APC The other : Apache with MPM-itk + APC. For both of these servers, APC has no cache system entries but only users cache entries as you can see on the screenshot. APC with only users cache entries APC configuration is : apc.cache_by_default 1 apc.canonicalize 1 apc.coredump_unmap 0 apc.enable_cli 0 apc.enabled 1 apc.file_md5 0 apc.file_update_protection 2 apc.filters apc.gc_ttl 3600 apc.include_once_override 0 apc.lazy_classes 0 apc.lazy_functions 0 apc.max_file_size 2 apc.mmap_file_mask apc.num_files_hint 1000 apc.preload_path apc.report_autofilter 0 apc.rfc1867 0 apc.rfc1867_freq 0 apc.rfc1867_name APC_UPLOAD_PROGRESS apc.rfc1867_prefix upload_ apc.rfc1867_ttl 3600 apc.shm_segments 1 apc.shm_size 256 apc.stat 1 apc.stat_ctime 0 apc.ttl 7200 apc.use_request_time 1 apc.user_entries_hint 4096 apc.user_ttl 7200 apc.write_lock 1 Does anyone know why APC acts like this and how to make it work well ? Thank you for your help!

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• IIRF - Redirecting all traffic to the http equivalent

  - by GordonB

  I'm using IIRF and having some trouble getting it to redirect all traffic to the secure version of my sites. So... I have a website with about 20 apps in virtual directories in IIS6. The website takes 80 and 443 traffic. I want to use IIRF to redirect all port 80 traffic EG; http://myserver/app1/page1/param1 http://myserver/app2/ http://myserver To the secure equivalent (https). Here's my config so far; # Iirf.ini # # ini file for IIRF # RewriteLogLevel 1 RewriteLog D:\Websites\Apptemetry\IirfLogs RewriteEngine ON StatusInquiry ON IterationLimit 5 RewriteLogLevel 3 RewriteCond %{HTTPS} off RewriteCond %{SERVER_PORT} ^80$ RedirectRule ^http(.*)$ https$1 Can anyone advise the correct configuration to use, to redirect all traffic?

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• When load balancing, must all copies of static web page be exactly the same?

  - by Gilles Blanchette

  I am used to get answers for everything on the web, but not this time... Yesterday I enable Amazon DNS weight functionally to load balance 7 websites between two different IP addresses (split 50%-50%). Both servers run IIS 8.5, sites runs well on both sides. Today I found out that Google WebMasterTools is reporting fails error with file robots.txt, all close to 50% of access try errors. The robots.txt file is ok and accessible (even via Google testing URL page) on both servers. Lets say current version of static web pages are on the first computer and the updated version of the same web pages are on the second computer. Can it be the problem? When load balancing, can static web pages be slightly different from one host server to the other? Thank you for your help

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• How can I figure out which PHP extensions aren't being used?

  - by Tom Marthenal

  I manage a server (running Ubuntu) which hosts our client's sites with a few dozen different PHP-based websites, mostly small sites but also some installations of CMSes and forums. I used the get_loaded_extensions() method to see what extensions I have loaded. To help streamline the server (remove unnecessary extensions to make upgrading easier and marginally improve speed), I'd like to remove extensions that aren't being used by any of the sites. I currently have 54 different extensions loaded. I can easily eliminate some of these from the list which I know are used, but others I am less sure about. Is there some way that I can see extensions which have not been used recently?

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• Firefox: How to get my home page in new tabs, instead of the recent sites 'tiles' thing :(

  - by Sheldon Pinkman

  In Firefox 25 (running on Windows 7), I have the following Startup settings: When Firefox starts = 'Show my home page' Home Page = (URL of the site I want) So when I click on the Home button, I get the right page. That's all good. However, when I open a new tab, I get the 'recently visited websites tiles' screen, i.e. this: Screenshot. How do I get Firefox to show my Home Page in new tabs as well?? Note: when I open a new Window, it works OK. I'm getting the Home Page there. The problem is just with New Tab!

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• Parallels: How to see a Mac-hosted website from Windows?

  - by Jim Miller

  I'm traveling at the moment, and have moved one of the websites I'm working on to my MBP so I can work on it without a network connection. I've made an addition to the Mac's /etc/hosts file pointing the domain name to 127.0.0.1, and all's well. I now want to get into Parallels and check the site from Windows browsers. How do I get things so that the Windows browser will understand the domain name and access the site? The Windows image obviously doesn't recognize / can't find the Mac's /etc/hosts file, and references to 127.0.0.1 in the Windows hosts file just as obviously point to Windows, not the Mac. Any advice out there? Thanks!

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• Postfix appears to ignore domain's MX records

  - by DisgruntledGoat

  On my dedicated server, I have Postfix installed for sending email through the websites. One of my clients hosts their email with a third party so we have MX records set up on the domain. However, when sending any Postfix emails from the server, they do not get the emails. I think since the domain is pointing at the server itself, it tries to send mail to itself, but there is nothing on the server to handle the email for that domain. (There are mail accounts for other domain which are working fine.) How do I get Postfix to use the domain's MX records to send email? Server is Ubuntu 8.10 with standard LAMP stack. I have Webmin installed, and a control panel called "Matrix" provided by the host.

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• Browser keeps being really rude to me today

  - by j-t-s

  Hi All I've had this problem only once before, years ago. I bought a new computer the other day and last night I visited a website which Google Chrome suspected was an insecure site. So I proceeded to view the page anyway (Stupid, I know... But I was curious), and all of a sudden the window closed and ever since, every few minutes either Google chrome or Internet Explorer keeps popping up with random websites, most of which are porn-related sites. I have downloaded ZoneAlarm, IOBit 360, Eset Smart Security and none of them reported any problems. I still have the rube browser problem. Can somebody please suggest any software/ways to fix this? (Other than to reformat please :)) Thank you :)

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• How can I prevent frame breaking in Chrome from Google image searches, etc.?

  - by Nick T

  More often than not, websites with any number of images will use frame breaking scripts to lose Google Image Search's results frame (e.g. this relatively benign case). While I somewhat understand the reasons for doing so (as ineloquently put forth by these people), more often than not, such breakout/redirects dump me to a useless page that doesn't have the image I was looking for, plus it makes going "back" rather irritating as you need to click twice or more (some pages jam you through several redirects it seems) in rapid succession. Other than having reflexes to copy the 'Full-size image' hyperlink quicker than loading the breakout script, is there a way to get my actual result?

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• Duplicating keepass files instead of creating a new file

  - by BlakBat

  I'm currently using KeePass 2 and syncing them via dropbox. I have a few KeePass files (one for websites, one to store software licenses, etc...) Every time I need a new KeePass file, I just create a copy of the kbdx file, open it, remove all existing entries, change the key transformation rounds to another pseudo-random value. I do not change the master password. I want to know if this was unsafe practice, or was a security risk, compared to just creating a new KeePass file via the "File-New" menu. The reason I don't use the menu: i'm lazy enough to not want to reconfigure "database settings" every time.

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• exim sending mail to wrong mail server

  - by Chris Bull

  I have recently taken over management of a server running centos and whm. It has several websites and domains running under reseller accounts. Email has always been on a server at our actual office. I have recently changed our email from our local email server to gapps for business (our local email server was pretty archaic). However, when any email is sent from the web server (such as wordpress etc) to our domain - it still routes it to the IP of our old email server. I am not very familiar with WHM or exim so don't really know how to address this. Email to other domains works fine and the gapps is working perfectly. Any help is much appreciated.

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• Remote Desktop Solution without VPN, with locked PC

  - by ujjain

  Sometimes I work from home and I use either of these 2 methods: Teamviewer VPN + Remote desktop When I connect with VPN I am however unable to browse any websites on my own computer, which can be very inconvenient when I am basically waiting an hour for somebody else to finish his job to do a 5 minute job. It would be nice if I could still continue browsing. A solution for this is Teamviewer. With Teamviewer I can manage the other computer, without suffering the restrictions of using the VPN. Everybody in the working area however, can see me using my computer remotely and this is not a good situation either, especially during work hours. I would like a solution that allows me to continue browsing normally and still control my remote workstation, without other people seeing every move I make on the workstation.

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• Migrating users and IIS settings from a workgroup win2k3 machine to a new win2k8r2

  - by amber

  I am retiring my old Windows Server 2003 Standard 32bit machine to a new machine with Windows Server 2008 R2 Standard. The two sticking points are migrating user accounts (and there are a lot of them) and IIS settings/websites (again, there are a lot). The new machine has not been provisioned yet. I'm at that point where I'm about install the OS on it. The old machibe is configured with a mirrored set for its OS and data partitions. I have broken the mirror set, replicated all of the data to an external drive, and then rebuilt the mirror set. In short, I have an image of the old machine to play with while safely leaving it up and running. Thanks!

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• Script to run chown on all folders and setting the owner as the folder name minus the trailing /

  - by Shikoki

  Some numpty ran chown -R username. in the /home folder on our webserver thinking he was in the desired folder. Needless to say the server is throwing a lot of wobbelys. We have over 200 websites and I don't want to chown them all individually so I'm trying to make a script that will change the owner of all the folders to the folder name, without the trailing /. This is all I have so far, once I can remove the / it will be fine, but I'd also like to check if the file contains a . in it, and if it doesn't then run the command, otherwise go to the next one. #!/bin/bash for f in * do test=$f; #manipluate the test variable chown -R $test $f done Any help would be great! Thanks in advance!

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• HP Pavillion dv6 laptop - 15 beeps on startup and a black screen?

  - by dunc

  Usual story - girlfriend's step-brother's laptop is broken. I don't know a huge amount about what occurred before it broke, but I do know the following: When you try to turn the laptop on, it beeps 15 times exactly. The screen remains black. The LED on the Caps Lock key flashes continuously. If left on, the laptop never boots - as far as I can see. If left on, on a stable surface with decent ventilation for a relatively short period of time, the laptop (below keyboard, but not where the RAM/HDD are) gets very hot. I've tried doing what most websites appear to recommend for similar problems, which is to disconnect AC and battery then hold the power button down for a minute before reconnecting the AC and trying to turn the laptop on - no difference. EDIT I've also tried re-seating the RAM, to no avail. Any ideas? Thanks in advance,

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• solr administration

  - by devrick0

  Does anyone have any notes for an sysadmin supporting solr? I'm looking for anything that might be useful for monitoring & metrics as well as troubleshooting. Some useful links I have found are: /solr/admin/stats.jsp and /solr/admin/analysis.jsp In the logs I have noticed, other than the query, "hits", "status" and "QTime" values. The documentation on what these mean is sparse at least based on the 100+ websites I have checked. QTime appears to be the query time response in milliseconds. Hits is some form of results but I'm not sure exactly what makes that up and I'm not sure about status. Typically I see status come back as "0" but I have seen other numbers such as "5", so my thoughts that it could be either HTTP status codes or a 0 or 1 (good or bad) methodology isn't accurate. All of the documentation I have come across is intended for developers. Any sysadmin-centric documentation would be a big help.

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• How to export a list of addresses that email in my spam folder was sent to? [migrated]

  - by Hugo

  With a Gmail [email protected] address, you'll also receive email sent to [email protected] addresses, very handy for creating filters. I often [email protected] when signing up to websites, so if I end up getting lots of spam sent to that address, I know who to blame. But what's a good way to find a list of all username+anything@ addresses in my Gmail spam folder? I'd prefer to do this within the web client if possible. Next best is using external client such as Outlook or Opera mail but without having to download lots of mail if possible. I don't really want to download spam emails.

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• Stop moving page title in Firefox?

  - by lilydjwg

  Some websites I'm using always make the web title move or blink when, for example, a new mail has just arrived. It is really disturbing as it's not an emergency and usually I'm busy browsing other pages. I can't stand it any longer, but I have to use those services. I want to stop this kind of behavior either by installing a new extension or writing a Greasemonkey script. But I can't find one and have no idea about how to detect and stop the JavaScript code. What is the solution?

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• How to point subdomain to a nameserver?

  - by vonconrad

  I've got an old crusty WHM/cPanel server which I'm trying to get rid of. I've got a new setup on shared hosting which is much cheaper in the long run. The problem is that there are a bunch of websites on the server whose domains I don't have access to. They're currently pointing to name servers of my domain (ns.mydomain.com), but the new provider has their own name servers (ns.provider.com) which I have to use instead. My initial idea was to set up a CNAME to point my name server to my provider's: ns.mydomain.com CNAME ns.provider.com, but I read in this question that this would be a bad idea. The accepted answer suggests using an A record instead, and I want to make sure how this would work. Assuming ns.provider.com has an IP address of 123.123.123.123, is it just a matter of doing ns.mydomain.com A 123.123.123.123? Is there any way the provider could block those requests as the name server domain technically doesn't belong to them?

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