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• Can a USB/IDE/SATA adapter be flaky?

  - by Ward

  I use USB/IDE/SATA converters a lot and on the two that I have now, I sometimes get errors copying files to drives. It only happens when I'm copying big files to the drive (big can mean as little as 100MB, I think it happens more often with bigger files - 300MB or more), and basically the copy will fail and I'll get one or more error messages about "Delayed write failed." But if I disconnect the drive and re-connect it, I'll usually be able to continue. (The file that was being copied will be corrupt, but otherwise the drive is fine.) I just noticed a new type of flakiness: the data transfer rate can vary widely. I copied one set of files (5x300MB files) and it took 10+minutes, then I copied another set (approx. the same sizes) and it took less than a minute. I haven't done systematic testing, the other things I'm doing on my laptop at the same time might have some impact, and I haven't cross-checked the two adapters I have and the 3 hard drives I'm working with to see if there's a pattern. I'm more wondering if anyone else has seen anything like this.

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• How to force the start and end date of a task in Microsoft Project to be on the same day?

  - by Hauke P.

  I have a task called "Interview person A about topic X". The task's duration is set to 2 hours. The start date of the task should automatically be calculated taking dependencies and resource availabilities into account. My question boils down to: How can I force this task to start and end on the same date? Background: In my case, Microsoft Project sets the start date to a Friday at 5pm. As my working hours are set to 8am to 12am and 1pm to 6pm (Mon-Fri), Microsoft Project "splits up" the task at 6pm on Friday and plans to continue it at 8am on the following Monday. However, it does not make any sense to stop the interview on a Friday and restart it on Monday. Therefore the automatic suggestion is not helpful in this case. That's why I'm looking for a way way to force the task to start and end on the very same day. (In my example, I'd like Microsoft Project to delay the start date of the task until Monday 8am as this is the first time slot in which the task "fits in completely".) By the way: I have lots of such cases... for that reason it would be really great if there was a solution that doesn't just deal with this single special case.

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• Can't access shared folder of win8/win7 machine - Error code: 0x80004005. Unspecified Error

  - by ruslan

  It's ironic that I, software engineer with 12 years of experience, continue to have this problem from one version of Windows to another without being able to achive consistent result (sometimes it works). Here it goes again. I have a machine with Win8 Consumer Preview. It doesn't really matter that it's win8. I had same issue with win7 before. On given machine I created local admin user with same name and password I have on second PC (the machine I'm typing this from now). I have two questions to you guys. Why I'm not able to access C$ share of win8 machine from another Win7 machine? I get error that C$ doesn't exist even though it does. Why I'm not able to access share named "test" in Win8 for which Permission set to Full for Everyone. When I attempt to access it from Win7 machine I'm asked to enter username and password. After entering administrator credentials I get error "Windows cannot access \192.168.1.123\test. Error code: 0x80004005. Unspecified Error". Windows Firewall is disabled on Win8 machine for both Private and Public networks. Guest account is disabled. Built-in admin account is enabled. Machine is pingable from other machines.

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• VMware guest pauses when the host is idle - how do I keep it running?

  - by EMP

  I'm running VMWare Worstation 7 with Windows 7 x64 as guest, Windows XP x64 as host. Inside the guest I run a long-running console application, which prints out progress messages with timestamps on them. Sometimes I leave it running for several hours while I lock the host OS and don't touch the computer at all. When I come back I find that some time after I left it seems to have paused and automatically resumed: the console app hasn't made much progress and there's a large time gap in its progress messages. There's nothing relevant in the host event log, but in the guest Application event log I can see these messages around the time I left: A request to disable the Desktop Window Manager was made by process (VMware Tools Service) The Desktop Window Manager was unable to start because composition was disabled by a running application And later, around the time I returned, this shows up in the System log: The system time has changed to ?2012?-?01?-?12T06:36:46.921000000Z from ?2012?-?01?-?12T03:18:19.953079000Z. That seems to support my theory that it's VMware doing something and not Windows itself. The question is: how do I stop it doing that? I want my application to continue running. By the way, the power options are set to never sleep in both guest and host.

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• Find which files an apache process is writing to?

  - by Haluk

  We have this apache process which becomes io-bound time to time. Using atop, we can see it is a write operation. Using lsof -p <PID> we can see a list of files open by the httpd process. First we thought "log" files must be the problem. So we turned them off just to test. However write operations still continues. We will continue testing a few other things. For instance we use php session variables a lot. Maybe php session files are getting all the writing. But is there a way to quickly identify files which get written to by the httpd process? This way we can focus our efforts on those files. UPDATE: We used the strace command as suggested. Here are two lines from the output. write(23, "\27\0\0\0\3SET CHARACTER SET utf8", 27) = 27 write(23, "\17\0\0\0\3SET NAMES utf8", 19) = 19 We do not have a mysql process on this server. So is strace also showing what is being written to an ethernet port? UPDATE2: During high io load, the process which consumes most of the write resources gives the following output to strace -e trace=write -p <PID>: --- SIGCHLD (Child exited) @ 0 (0) --- write(9, "!", 1) = 1 write(19, "OPTIONS * HTTP/1.0\r\nUser-Agent: Apache (internal dummy connection)\r\n\r\n", 70) = 70 However I cannot figure out where these are being written to.

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• How to configure a Web.Config file to allow custom 404 handling while still displaying on-page 500 error detail?

  - by Mark

  To customize 404 handling and based on the hosting company's suggestion, we are currently using the following web.config setup. However, we quickly realized that with this configuration, any page error (500 error) are also getting redirected to this custom error page. How can I modify this config file so we can continue to handle 404 with custom file while still able to view on-page error? <?xml version="1.0" encoding="utf-8" ?> <configuration> <system.webServer> <httpErrors errorMode="DetailedLocalOnly" defaultPath="/Custom404.html" defaultResponseMode="ExecuteURL"> <remove statusCode="404" subStatusCode="-1" /> <error statusCode="404" prefixLanguageFilePath="" path="/Custom404.html" responseMode="ExecuteURL" /> </httpErrors> </system.webServer> <system.web> <customErrors mode="On"> <error statusCode="404" redirect="/Custom404.html" /> </customErrors> </system.web> </configuration>

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• computer freezes but music continues

  - by Danny

  Recently I have had a problem where my computer will freeze completely but if I happen to be streaming Pandora in a tab that will continue playing. If I wait about 2-5 minutes it will eventually come back and start working normally. I also noticed that during the period that it is unresponsive that the HDD activity light stays lit the whole time, not flashing. I've ran memtest86+ and a diagnostic from Western Digital for my HDD model and none of them reported any errors. The specs for my computer are 1 x ASRock H55M/USB3 R2.0 LGA 1156 Intel H55 HDMI USB 3.0 Micro ATX Intel Motherboard 1 x CORSAIR Enthusiast Series CMPSU-550VX 550W ATX12V V2.2 SLI Ready CrossFire Ready 80 PLUS Certified Active PFC Compatible with Core i7 Power Supply 1 x Intel Core i3-540 Clarkdale 3.06GHz LGA 1156 73W Dual-Core Desktop Processor Intel HD Graphics BX80616I3540 1 x G.SKILL 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Dual Channel Kit Desktop Memory Model F3-12800CL9D-4GBNQ 1 x ASUS PCE-N13 PCI Express 150/300Mbps Transfer/Receive Rate Wireless Adapter 1 x EVGA 01G-P3-1556-KR GeForce GTX 550 Ti (Fermi) FPB 1GB 192-bit GDDR5 PCI Express 2.0 x16 HDCP Ready SLI Support Video Card I can't imagine what would be causing these problems.

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• Using the full width of an Excel chart with two Y-axes

  - by Jørn Schou-Rode

  I am trying to create a line chart in MicrosoftExcel 2007 with two data series, each with their own Y-axis. First, I create a simple chart by selecting the two data series, and choosing Insert > Charts > Line from the Ribbon. I now see the following chart in my workbook: I then continue my quest by right clicking one of the data series (lines) and choosing Format data series > Series Options > Secondary Axis. My chart is now looks like this: This is almost what I want. I did not expect to see the gap between the last X-axis tick point (x = 5) and the secondary (right most) Y-axis. Why does Excel introduce this gap? Is there anything I can do to avoid it? I have tried right clicking the X-axis and seleting Format Axis > Axis Options > Position Axis: Between tick marks, but that only introduces a similar gap on by the primary (left most) Y-axis.

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• Windows 7 mouse multi selection on windows explorer with CTRL and point to select / single click to open

  - by bortao

  This is something that have annoyed me since i changed to Windows 7. I don't do double click for a long time now since windows introduced 1 click selection (Folder Options Click items as follows Single click to open an item). The problem is, when i click Control and hover over the items, they select/deselect automatically every small amount of mouse movement i make. What i want is to select/deselect the items only when i enter/exit them. So to deselect an item im hovering, i have to move the mouse out of it, and then back in. I'm using Intellimouse Explorer official drivers. (edit) Here's another related annoyance: When you are hovering something and move the mouse inside other item (Holding Ctrl) The new item may or may not be selected. If you continue moving the mouse it gets selected/deselected as you move. (more edit) I have found that the parameter HKCU\Control Panel\Mouse\MouseHoverHeight / MouseHoverWidth have some influence here. If it's set to 2, the item select/deselect really quickly as you move the mouse. When set to larger numbers, its slower. But setting to 20 or 200 don't seem to be much different.

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• ddwrt client brigde acces point lost

  - by llazzaro

  Ok I have an AP with ddwrt firm (i know its not the best, but continue reading!) AP is configured to work like a wifi "transparent" brigde, also it had a virtual wifi network card to expand radius of wifi signal in that same AP. The brigde is working, computers behind AP gets ips from main routers which shares internet....BUT! I cant access webgui of the bridge AP... Main problem : AP is lost, but its working as brigde. I cant find it in the network (it didnt have any ip!) so I cant change any configuration... First solution : Reset AP, but it cannot be done. Reset button dont works due to a bug in ddwrt micro firm that mi linksys WAP54g had installed (I really hate this firmware I like more openwrt that my main router has) Second Solution : arp -a from main router , from computers behind AP...It dont appears in the list. Any more ideas, the router at some level must be there, the brigde is working. I know its possible that the AP is with an ip like 192.168.100.2 , my subnect actually is 172.16.X.X. :) thanks!

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• How to perform this Windows 7 permissions change on many files via GUI or command line

  - by hippietrail

  After using my external hard drive on another Windows 7 computer to tweak photos with Windows Live Photo Gallery then upload them to Facebook I found the modified images were now not visible on the original Windows 7 computer. I'm not sure if the things I tried to get it working subsequently changed anything, but I do know this is the sequence of actions that makes the permissions of the modified files match those of the unmodified files: Right click on broken image file, select "Properties" On the "Security" tab press the "Advanced" button In the "Permissions" tab press the "Continue" button with the shield icon on it Tick the box marked "Include inheritable permissions from this object's parent Click the "Remove" button to remove the only current entry "Type: Allow, Name: Administrators (XYZ\Administrators), Permission: Full control, Inherited From: OK on the "Permissions" tab. OK on the "Security" tab. Now this same procedure does not work at the folder level. It results in "access denied" dialogs. I'm looking for some way to perform this exact modification on all the images I edited on the other computer. I'm happy to use the Windows GUI in Explorer or any other included tools. I'm happy to use the Windows command line. I'd prefer not to use a third-party tool since I'd have to be satisfied it's not doing anything else. I'm not looking for a different way to change permissions to other settings to make an external drive full of photos editable on multiple computers. At least not in this question.

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• How to write rules for persistent net names?

  - by ndemou

  I know that a process generates persistent network card names based on rules found in /lib/udev/rules.d/75-persistent-net-generator.rules. I also know how to completely disable this process with a simple echo '#' > /etc/udev/rules.d/75-persistent-net-generator.rules but I've read that I "could also write my own rules file to give the interface a name — the persistent rules generator ignores the interface if a name has already been set" (/etc/udev/rules.d/README confirms that this is possible). Do you have any pointers to documentation about how to write such rules? (I mostly care about Debian/Ubuntu and a bit less for CentOS) As a specific example of why I want to write custom rules: I have two identical servers with one onboard LAN and one PCI LAN. In case of HW failure I want to be able to move disks from HW#1 to HW#2 and it's important for eth0 to continue pointing to the onboard card and eth1 to the PCI card (no one wants to mess with cabling in the middle of a HW failure panic). My current workaround works but is a lot of work[1] so I wonder if writing custom rules would allow me to express something simple like this: cards with MAC A or B should be named eth0 cards with MAC C or D should be named eth1 follow default naming scheme for anything else [1] install the OS in HW#1 and keep a copy of /etc/udev/rules.d/70-persistent-net.rules. Move the disks to HW#2 and keep a second copy of the same file. Concatenate the two copies and manually edit the NAME="ethX" part. Replace /etc/udev/rules.d/70-persistent-net.rules with my version. Finally disable auto-creation of a new 70-persistent-net.rules using echo '#' > /etc/udev/rules.d/75-persistent-net-generator.rules

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• NGINX returning 404 error on a valid url

  - by Harrison

  We have a site that runs PHP-FPM and NGINX. The application sends invitations to site members that are keyed with 40 character random strings (alphanumerics only -- example below). Today for the first time we ran into an issue with this approach. The following url: http://oursite.com/notices/response/approve/1960/OzH0pedV3rJhefFlMezDuoOQSomlUVdhJUliAhjS is returning a 404 error. This url format has been working for 6 months now without an issue, and other urls following this exact format continue to resolve properly. We have a very basic config with a simple redirect to a front controller, and everything else has been running fine for a while now. Also, if we change the last character from an "S" to anything other than a lower-case "s", no 404 error and the site handles the request properly, so I'm wondering if there's some security module that might see something wrong with this specific string... Not sure if that makes any sense. We are not sure where to look to find out what specifically is causing the issue, so any direction would be greatly appreciated. Thanks! Update: Adding a slash to the end of the url allowed it to be handled properly... Would still like to get to the bottom of the issue though. Solved: The problem was caused by part of my configuration... Realized I should have posted, but was headed out of town and didn't have a chance. Any url that ended in say "css" or "js" and not necessarily preceded by a dot (so, for example, http://site.com/response/somerandomestringcss ) was interpreted as a request for a file and the request was not routed through the front controller. The problem was my regex for disabling logging and setting expiration headers on jpgs, gifs, icos, etc. I replaced this: location ~* ^.+(jpg|jpeg|gif|css|png|js|ico)$ { with this: location ~* \.(jpg|jpeg|gif|css|png|js|ico)$ { And now urls ending in css, js, png, etc, are properly routed through the front controller. Hopefully that helps someone else out.

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• WINDOWS: Your computer hangs. You can windows + R (run dialog) but performance is so halted taskMGR

  - by John Sullivan

  The question is, what process are available to try to recover from total system instability before pulling the plug when we can do nothing but programs or batches in the path from the run dialog (windows + r key), and performance is so dead that taskMGR / procEXP / other programs with visual guis are not usable? I am not a windows expert, but ideally someone out there has written a program that does more or less stuff like this: Immediately set (or perhaps I can set from the run prompt) its priority to extremely high, evaluate performance bottlenecks. E.g. is CPU 100%? If so identify offending program(s) or problems. Attempt / log fixes, then provide crude feedback asking the user if his performance has stabilized enough to abort, wait a few seconds, if no feedback continue, etc. etc. Eventually try to do any "system cleanup" if the program decides it cannot recover and perhaps finally provide a series of beeps to the user, or what have you, to say "OK, I give up, time to pull the plug". Ideally create a log, when able. These kinds of horrible hangs are a situation where surely trying something, anything, is better than nothing -- as long as that something is intelligent -- when the alternative is ripping out the power coord. Again, I am not a windows expert, so perhaps there is a much more elegant "hands on" approach I am not aware of.

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• With puppet, can you have the client ask to be a certain set of roles?

  - by Aitch

  I've recently got my puppetmaster and client up and running and have had the client correctly signed, then requested and applied simple changes, all good. I have a growing number of machines (100). They are not consistently named (historical reasons). They fall into a handful of categories (think of it like: dataserver_type1, dataserver_type2, webserver_type1, webserver_type2....). New instances of these types of machines are added weekly. I don't understand (yet) or cannot see how I can declare a "generic" node of (say) "dataserver_type1" that contains whatever modules it needs, and set something in the client puppet.conf that says "I am a dataserver_type1" without using the hostname/FQDN If I set the node name in the catalog as (say) "my-data-server-type1" - the certified hostname - it picks it up and works. I know you can use patterns for hostnames but as I said, my server names are not consistent, and I can't change them. This seems disingenuous to have to edit a file and manually add a node for each server, when they continue to grow. Edit: Digging deeper, it seems roles may be what I want. But there still seems to be an element whereby the master has contain a list of roles that a specific named server should do. Perhaps what I am asking is, how can a client say "I want to be this role", without the server having to be updated?

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• Multiple SSL certificates on Apache using multiple public IPs - not working

  - by St. Even

  I need configure multiple SSL certificates on a single Apache server. I already know that I need multiple external IP addresses as I cannot use SNI (only running Apache 2.2.3 on this server). I assumed that I had everything configured correctly, unfortunately things are not working as they should (or maybe I should say, as I expected them to work)... In my httpd.conf I have: NameVirtualHost *:80 NameVirtualHost *:443 Lets say my public IP is 12.0.0.1 and my private IP is 192.168.0.1. When I use the public IP in my vhost my default website is being shown instead the one defined in my vhost, e.g.: <VirtualHost 12.0.0.1:443> ServerAdmin [email protected] ServerName blablabla.site.com DocumentRoot /data/sites/blablabla.site.com ErrorLog /data/sites/blablabla.site.com-error.log #CustomLog /data/sites/blablabla.site.com-access.log common SSLEngine On SSLCertificateFile /etc/httpd/conf/ssl/blablabla.site.com.crt SSLCertificateKeyFile /etc/httpd/conf/ssl/blablabla.site.com.key SSLCertificateChainFile /etc/httpd/conf/ssl/blablabla.site.com.ca-bundle <Location /> SSLRequireSSL On SSLVerifyDepth 1 SSLOptions +StdEnvVars +StrictRequire </Location> </VirtualHost> When I use the private IP in my vhost everything works as it should (the website defined in my vhost is being shown), e.g.: <VirtualHost 192.168.0.1:443> ...same as above... </VirtualHost> My server is listening on all interfaces: [root@grbictwebp02 httpd]# netstat -tulpn | grep :443 tcp 0 0 0.0.0.0:443 0.0.0.0:* LISTEN 5585/httpd What am I doing wrong? If I cannot get this to work I cannot continue to add the second SSL certificate on the other public IP... If more information is required just let me know!

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• SQL Server Replication Backup

  - by user18039

  Hi We have a new system that runs on SQL Server 2008 r2 64-bit. There is a primary on-line transactional processing (OLTP) database that accepts a high volume of updates from several thousand Point of Sale systems at stores around the country. In order to protect this vital function, I have decided to introduce a dedicated reporting database server - from which multiple users will run some pretty complex reports. I realise that there were a number of choices but I decided to use Transaction Replication as the mechanism for copying the data from the OLTP database to the new reporting database - one way replication. The solution has worked well in test. I'm now being asked what changes need to be made to the backup policy to cover the architectural changes. I have read pages such as MSDN:Strategies for Backing Up and Restoring Snapshot and Transactional Replication but I think these are overkill for my solution. In fact, my current thinking is that we simply need to continue making backups of the OLTP data and logs. If the Reporting db or any of the system replication (eg distribution) databases fail then it's no big deal - we can clear all down then re-create the replication. I realise that taking a complete snapshot of the OLTP would be time consuming (approx 5 hours) but I'd be more relaxed about this that trying to restore backups of the various data and log files in the correct sequence. My view is that the complex strategies set out in the MSDN article would only be the way to go for a more complex replication solution than I have, eg if there were multiple subscribers with 2-way replication. Would you agree? I'd be grateful for any advice. Many thanks, Rob.,

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• Vista: window focus problem

  - by GateKiller

  Sorry for the vague title but this one is hard to explain so bear with me please. I'm using Windows Vista at work for web development and sometimes when I Click or Alt-Tab to background window, the window will get focus but it will not be brought to the front. In order to bring the window to the front, I have to click on the applications border (when the resize cursor appears) and the window will then jump to the front. I've had this problem for about a year now and it happens at least a dozen times a day, but it doesn't do this all the time - seems random. I hope I have explained the issue fully (and you've understood it) and would appreciate any constructive answers or comments to solve this problem. Example: If I Alt-Tab from Google Chrome to Notepad and this problem randomly occurs, Google Chrome will remain in front of Notepad, however, I will be able to type text into Notepad while the window is behind Google Chrome. Clicking on Notepad's content area will not bring it to the front but clicking it's window border will. Video Exampe http://vimeo.com/19388998 In this video, I clicked from Google Chome to UltraEdit and chrome stayed in font, but as you can see, I can still type in UltraEdit. I'm starting to believe that this could be a bug in Google Chrome so I'll continue to watch if this between other applications.

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• can't install anything anymore with apt-get

  - by Aymane Shuichi

  Welcome this is the log I have when trying to install anything (php5-fpm after removing it) apt-get install php5-fpm Reading package lists... Done Building dependency tree Reading state information... Done php5-fpm is already the newest version. 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded. 1 not fully installed or removed. After this operation, 0 B of additional disk space will be used. Do you want to continue [Y/n]? y Setting up php5-fpm (5.4.4-14+deb7u10) ... insserv: warning: script 'S55IptabLes' missing LSB tags and overrides insserv: warning: script 'S55IptabLex' missing LSB tags and overrides insserv: There is a loop between service IptabLes and mountnfs if started insserv: loop involving service mountnfs at depth 8 insserv: loop involving service networking at depth 7 insserv: loop involving service mountnfs-bootclean at depth 10 insserv: There is a loop between service rc.local and mountall if started insserv: loop involving service mountall at depth 6 insserv: loop involving service checkfs at depth 5 insserv: loop involving service kbd at depth 11 insserv: There is a loop between service rc.local and mountall-bootclean if started insserv: loop involving service mountall-bootclean at depth 7 insserv: loop involving service urandom at depth 9 insserv: There is a loop between service IptabLes and mountdevsubfs if started insserv: loop involving service mountdevsubfs at depth 2 insserv: loop involving service udev at depth 1 insserv: There is a loop at service rc.local if started insserv: There is a loop at service IptabLes if started insserv: Starting IptabLes depends on rc.local and therefore on system facility `$all' which can not be true! (x99 times repeated ) insserv: Max recursions depth 99 reached insserv: loop involving service postfix at depth 2 insserv: There is a loop between service IptabLes and udev if started insserv: loop involving service mountkernfs at depth 1 insserv: loop involving service IptabLes at depth 1 Now here is the error i get insserv: exiting now without changing boot order! update-rc.d: error: insserv rejected the script header dpkg: error processing php5-fpm (--configure): subprocess installed post-installation script returned error exit status 1 Errors were encountered while processing: php5-fpm E: Sub-process /usr/bin/dpkg returned an error code (1) The biggest operation I held before this was updating nginx from 1.2 to 1.6 and it was thanks to this site : here is the link : How to upgrade nginx from 1.2 to 1.6 on debian 7 Please help !

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• Difference between all servers in one cluster and more than one cluster with servers?

  - by silla

  Not sure I understand what´s the difference or how it works when servers a running in one cluster or if there are more than one clusters with servers in it - regard High availability & Load Balancing. For me they are somehow the same, there is not really a big difference. Let´s make a simple example: 2 Servers in 1 Cluster 2 Clusters with each 1 Server - 1. If one Server failure, the other one is able to continue the work. The same for Load Balancing, these two Servers are able to balance the work together. - 2. The same thing! If one Server failure... The only thing that could be a problem with point 1. is if the Cluster fails (then both of the Server are dead). But is this even possible? I was reading stuff about clustering and high availability but I think I do not get this really. Probably I did not really understand how a cluster is working. Are these 2 points with 1 Cluster and 2 Clusters somehow the same or are there really some big differences? What should I know about it? Thank you

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• File corruption (bad checksums) in large files copied to VMware guest

  - by AllanA

  In setting up a development lab, I've got a desktop system running ESXi 4.1.0 (free license) on SATA RAID 0 (already purchased and configured when I started this job; I'm open to hardware input as it pertains to my problem.) Its guests so far include two Win2008 Server R2 64-bit VMs and on Ubuntu 10.04 64-bit VM. I'm installing onto the Windows servers. We've been copying off some fairly large files (over a gigabyte) for an installation, hoping to install more quickly from a (virtual) hard drive than from the network for from BD-ROM. The problem is that they keep coming up with different checksums from the originals. The file sizes are the same, but md5sum reports different numbers (and so does the installer, as it refuses to continue when the checksums don't match.) I've tried copying directly from the BD-ROM (attaching the OS drive to the host system's physical drive). I've tried copying the large files onto a co-worker's Windows machine from his Blu-Ray drive; when I do that, the checksums match. But when I copy from his machine to the VM guest over a network share, the checksums no longer match. Thinking this meant a corrupt destination drive, I deleted it in vSphere and added another freshly created drive. The problem persists. I'm not sure what to try next.

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• Active Directory server down, recovering without reinstalling

  - by whatever

  My Windows 2003 server suddenly ceased to function as a DC (this server is the only DC of the domain). All AD related services are down. The only way I can login to the AD is physically to the machine. Everytime I access an AD-related service (e.g. "AD users and computers") I get the below error: Naming information cannot be located because: The specified directory service attribute or value does not exist. Contact your system administrator to verify that your domain is properly configured and is currently online. I found the below system event which matches the time when the issue started, this re-occurs everytime I reboot the server. NTDS General | Global Catalog | Active Directory was unable to establish a connection with the global catalog. Additional Data Error value: 1355 The specified domain either does not exist or could not be contacted. Internal ID: 3200d33 I started the troubleshooting with DNS. Netdiag throws the below error although I think this is simply a consequence of not being able to access the Global Catalog. The procedure entry point DnsGetPrimaryDomainName_UTF8 could not be located in the dynamic link library DNSAPI.dll. Anyway DNS seems OK because I can ping the DC FQDN from the DC itself. I found the below solution which is supposed to help by doing some cleanup of the metadata: http://support.microsoft.com/kb/216498 If I follow procedure 1 here is what I get at step 9: no current site Domain - DC=<mydomain>,DC=<com> no current server no current naming context I can continue the procedure until step 14. I haven't tested step 15 as my understanding is that I will have to reinstall the whole AD again. Is there any way I can recover my AD from there without having to reinstall the whole thing? Update: Yes, the server was powered off/on because reboot would take forever (not because I thought power cycling the unit would fix it more than a reboot).

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• Oracle Linux screen freezes during installation

  - by Fearless

  I was installing Oracle Linux 6.4 on a server, and the screen suddenly froze. Here were the previous steps: I put in the disk, clicked install, checked the disk (no errors), did pre-install setup (clock, root password, host+domain name, etc.), configured two 40GB hard drives in a RAID1 array (no swap, 3100mb encrypted raid partitions, ~100mb ext4 partition mounting to /boot, encrypted ext4 RAID device with mounting to /), selected packages, hit continue. The system did its short preinstall processes, then when to the main installation screen with the long status bar. The installer proceeded like always, but around package 250 out of ~1000, the screen suddenly went black with a text cursor in the upper left corner of the screen and the mouse cursor in its previous place. Neither cursor moved and the only thing that triggered a response was a ctrl-alt-delete that rebooted it. I have run this in VMs before without this issue. Memtest hasn't reported anything, and the media check went smoothly. The machine has supported Ubuntu server without issues before. Any ideas? I have tried booting after that, but the grub bootloader tries to find fd0 for some reason (I have no idea why it would search for the floppy disk). UPDATE My server successfully installed, but won't boot up. I think that, for some reason, it is still using the old bootloader from the previous installation. Any ideas on how to fix that?

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• Vim move cursor one character in insert mode without arrow keys

  - by bolov

  This might seem a little too overboard, but I switched to vim and I so happy about the workflow now. I try to discipline myself not to use the arrow keys, as keeping the hands on the alfa-keys all the time is such a big thing when writing. So when I need to navigate I get out of insert mode, move in normal mode and get back in insert mode. There is an exception where this is actually more disrupting: I use clang complete with snippets and super tab which is great. Except every time I get a function auto completed after I fill in the parameters I am left with the cursor before ) so to continue I have to move the cursor one character to the right. As you can imagine this happens very often. The only options I have (as far as I know) are : Escla or ?, and I am not happy about neither of them. The first one makes me hit 3 keys for just a simple 1 character cursor move, the second one makes me move my hand to the arrow keys. A third option would be to map CTRL-L or smth to ?. So what is the best way of doing this? //snippets (clang complete + supertab): foo($`param1`, $`param2`) //after completion: foo(var1, var2|) ^ ^ | | I am here | Need to be here | denotes cursor position

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• If I ssh to a domain provided by dyndns, does my password go through them?

  - by D Connors

  I'm running Ubuntu on my work PC, and my work place provides me with a static IP address but not with a domain. It's sometimes useful for me to connect to that PC through ssh, but it's not common enough for me to instantly remember the IP number. So I set um a dyndns account, and associated a short and intuitive domain name to that IP. Here's my question, when I try to ssh to the domain, it asks me $ ssh [email protected] The authenticity of host 'something.there.foo (xx.xx.xx.xx)' can't be established. RSA key fingerprint is 'ALPHANUMERIC STRING' Are you sure you want to continue connecting (yes/no)? That surprised me a little bit. I have already registered the RSA fingerprint by connecting directly to the IP address. I thought the domain name was simply a convenient way of pointing me in the right direction (i. e. the ip address), but that message makes me think my data is actually going through their servers or something. Which one is it? Am I sending my password through someone else's server? Or is ssh just really really careful, thus warning me even if the final destination is a know host? The ssh server I'm using is the openssh-server package.

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