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  • nf_conntrack complaints in dmesg

    - by Alexander Gladysh
    While investigating complains on bad HTTP server performance, I've discovered these lines in dmesg of my Xen XCP host that contains a guest OS with said server: [11458852.811070] net_ratelimit: 321 callbacks suppressed [11458852.811075] nf_conntrack: table full, dropping packet. [11458852.819957] nf_conntrack: table full, dropping packet. [11458852.821083] nf_conntrack: table full, dropping packet. [11458852.822195] nf_conntrack: table full, dropping packet. [11458852.824987] nf_conntrack: table full, dropping packet. [11458852.825298] nf_conntrack: table full, dropping packet. [11458852.825891] nf_conntrack: table full, dropping packet. [11458852.826225] nf_conntrack: table full, dropping packet. [11458852.826234] nf_conntrack: table full, dropping packet. [11458852.826814] nf_conntrack: table full, dropping packet. Complains are repeated every five seconds (number of suppressed callbacks is different each time). What can these sympthoms mean? Is that bad? Any hints? (Note that the question is more narrow than "how to solve specific case of bad HTTP server performance", so I do not give more details on that.) Additional info: $ uname -a Linux MYHOST 3.2.0-24-generic #37-Ubuntu SMP Wed Apr 25 08:43:22 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux $ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 12.04 LTS Release: 12.04 Codename: precise $ cat /proc/sys/net/netfilter/nf_conntrack_max 1548576 The server is under about 10M hits / day load.

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  • How do I get excel to close completely after creating a macro in a personal workbook?

    - by Greg B
    I am using Microsoft Excel 2007 and have several macros in my personal.xlsb workbook, which I use often, so it is very convenient that Excel opens them automatically when it starts. What I don't like is when I click on the "X" in the upper right corner of the window Excel does not exit when I close the last visible workbook. I think that this is because personal.xlsb is still open (though hidden). There are several other questions here on Superuser that have people remove personal.xlsb or move it so it doesn't open on startup (question 65297) or change settings to have only one window show in the taskbar (question 86989). (Sorry there are no hyperlinks--apparently I need more reputation to add additional hyperlinks.) I would like to have personal.xlsb open when I open Excel, have each Excel window show in the taskbar but have Excel exit when I click the "X" on the last workbook that isn't personal.xlsb. Any thoughts on how to achieve this?

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  • Why is the usable memory on my Macbook pro shown as 2.74 Gb when there is 4GB installed with 32bit Windows 7? [closed]

    - by Bobby Alexander
    Possible Duplicate: Windows XP and RAM 3.5GB+ Installed RAM : 4 GB but 2.96GB Usable......why? I have a Macbook Pro with 4GB of installed RAM. I have installed Windows 7 on it which shows the usable memory as 2.74GB. Why is this? Don't tell me the 32 bit story; I program for a living. The maximum addressible memory on a 32 bit system is 4 GB not 3 GB. Need proof? MSDN: Memory Limits for Windows Releases

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  • PHP & IIS 6 Encoding problem

    - by Alexander
    The server is running Windows 2003 with IIS 6.0.3790.1830 x86 (iis.dll). My database server is Microsoft SQL Server 2000. My PHP version is 5.3. The original application is hosted on appserv1 and it's database is on dbserv1. It's working fine, everything is tuned up, running great. It was needed to place the same application (different modules) on another server, for other uses, so I copied the database on dbserv2, configured appserv2 to host the application, so I achieved 2 almost identical copies. Both dbserv1 and dbserv2 use the same encoding, both appserv1 and appserv2 are on IIS6 with the same PHP configurations. I also tried my best to have the same settings in the IIS. I also made sure that I pass the encoding information both in the HTTP headers and in the meta tags with http-equiv. Both applications use utf-8. The Problem is that the copy of the application doesn't display the non-ASCII characters normally in the browser, even if the browser detects correctly the UTF-8 encoding of the page. First I thought it was a database issue, given the fact that MSSQL 2000 doesn't support UTF-8, and instead it uses UCS-2, but when I redirected the application on appserv2 to work with the database on dbserv1, it had the same encoding problems. This is why I am asking in what way I can make it work. thank you for reading.

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  • Can I set up multiple accounts on DD-WRT? [closed]

    - by Greg Ros
    Possible Duplicate: Can I set up multiple accounts on DD-WRT? I want to set up multiple accounts on DD-WRT (accounts meaning, username-password pairs). Specifically, I want one to be used primarily for remote web management (though there is no reason to restrict the account to such). Is this possible? If so, how do I go about it? I'm running: Router Model TP-Link TL-WR1043ND Firmware Version DD-WRT v24-sp2 (08/07/10) std - build 14896

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  • How can I tell which page is creating a high-CPU-load httpd process?

    - by Greg
    I have a LAMP server (CentOS-based MediaTemple (DV) Extreme with 2GB RAM) running a customized Wordpress+bbPress combination . At about 30k pageviews per day the server is starting to groan. It stumbled earlier today for about 5 minutes when there was an influx of traffic. Even under normal conditions I can see that the virtual server is sometimes at 90%+ CPU load. Using Top I can often see 5-7 httpd processes that are each using 15-30% (and sometimes even 50%) CPU. Before we do a big optimization pass (our use of MySQL is probably the culprit) I would love to find the pages that are the main offenders and deal with them first. Is there a way that I can find out which specific requests were responsible for the most CPU-hungry httpd processes? I have found a lot of info on optimization in general, but nothing on this specific question. Secondly, I know there are a million variables, but if you have any insight on whether we should be at the boundaries of performance with a single dedicated virtual server with a site of this size, then I would love to hear your opinion. Should we be thinking about moving to a more powerful server, or should we be focused on optimization on the current server?

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  • Save certificate to use with lftp

    - by Greg C
    How can I save a certificate for use with lftp? The certificate in question is not accepted by lftp when downloaded from the server. I tried openssl s_client -connect {HOSTNAME}:21 -showcerts from How to save a remote server SSL certificate locally as a file but this returns CONNECTED(00000003) 3074045628:error:140770FC:SSL routines:SSL23_GET_SERVER_HELLO:unknown protocol:s23_clnt.c:766: no peer certificate available I am connecting with lftp -p 21 -u {USER} {HOSTNAME} and receive ls: Fatal error: Certificate verification: Not trusted

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  • Is this a graphics card failure?

    - by Alexander Lozada
    I own an older 32-bit Dell XPS 410 that I intended to use for gaming. Currently, I have a ATI Radeon 4000 series card installed, along with a Core 2 Duo and Ubuntu 12.10. I'm fairly certain that my problem is a GPU failure - but before I spend money on a new one, I want to make sure other components aren't the problem/if it would be cheaper just to buy a new PC. Here are my symptoms: Computer power button remains orange (usually green when successfully started.) A fan gets increasingly faster until powered off. Monitor remains black when started, receiving no signal. When powered on, the computer will power itself off near instantly, and then turn on again. If startup is successful, sometimes the screen will become jittered and unusable unless restarted. Is this just a GPU failure, or something more extensive like the motherboard?

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  • Redis 2.0.3 would not let go of deleted appendonly.aof file after BGREWRITEAOF

    - by Alexander Gladysh
    Ubuntu 10.04.2, Redis 2.0.3 (more details at the end of the question). My AOF file for Redis is getting too large, to the point where it soon would threaten to take whole free disk space on my small-HDD VPS box: $ df -h Filesystem Size Used Avail Use% Mounted on /dev/xvda 32G 24G 6.7G 78% / $ ls -la total 3866688 drwxr-xr-x 2 redis redis 4096 2011-03-02 00:11 . drwxr-xr-x 29 root root 4096 2011-01-24 15:58 .. -rw-r----- 1 redis redis 3923246988 2011-03-02 00:14 appendonly.aof -rw-rw---- 1 redis redis 32356467 2011-03-02 00:11 dump.rdb When I run BGREWRITEAOF, the AOF file shrinks, but disk space is not freed: $ ls -la total 95440 drwxr-xr-x 2 redis redis 4096 2011-03-02 00:17 . drwxr-xr-x 29 root root 4096 2011-01-24 15:58 .. -rw-rw---- 1 redis redis 65137639 2011-03-02 00:17 appendonly.aof -rw-rw---- 1 redis redis 32476167 2011-03-02 00:17 dump.rdb $ df -h Filesystem Size Used Avail Use% Mounted on /dev/xvda 32G 24G 6.7G 78% / Sure enough, Redis is still holding the deleted file: $ sudo lsof -p6916 COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME ... redis-ser 6916 redis 7r REG 202,0 3923957317 918129 /var/lib/redis/appendonly.aof (deleted) ... redis-ser 6916 redis 10w REG 202,0 66952615 917507 /var/lib/redis/appendonly.aof ... How can I workaround this issue? I can restart Redis this time, but I would really like to avoid doing this on a regular basis. Note that I can not upgrade to 2.2 (upgrade to 2.0.4 is feasible though). More information on my system: $ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 10.04.2 LTS Release: 10.04 Codename: lucid $ uname -a Linux my.box 2.6.32.16-linode28 #1 SMP Sun Jul 25 21:32:42 UTC 2010 i686 GNU/Linux $ redis-cli info redis_version:2.0.3 redis_git_sha1:00000000 redis_git_dirty:0 arch_bits:32 multiplexing_api:epoll process_id:6916 uptime_in_seconds:632728 uptime_in_days:7 connected_clients:2 connected_slaves:0 blocked_clients:0 used_memory:65714632 used_memory_human:62.67M changes_since_last_save:8398 bgsave_in_progress:0 last_save_time:1299014574 bgrewriteaof_in_progress:0 total_connections_received:17 total_commands_processed:55748609 expired_keys:0 hash_max_zipmap_entries:64 hash_max_zipmap_value:512 pubsub_channels:0 pubsub_patterns:0 vm_enabled:0 role:master db0:keys=1,expires=0 db1:keys=18,expires=0

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  • Is the field BusID necessary in XF86Config?

    - by Greg
    Hello, I am using a cluster of machines running on Ubuntu 10.04 LTS which are supposed to be homogeneous, but apparently they are not. In particular, I am configuring the X server on these machines, and I pushed a /etc/X11/XF86Config that includes the following section: Section "Device" Identifier "Device0" Driver "nvidia" VendorName "NVIDIA Corporation" BusID "PCI:5:0:0" EndSection The problem is that the BusID of the graphic card is PCI:5:0:0 for some machines, and PCI:3:0:0 for others. Is there a way that the X server automatically detects the appropriate Device (based on the name for instance)? Thanks,

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  • Possible to create a shortcut in Windows 7 to a mounted network drive in XP Mode?

    - by Greg R.
    I'm using an application that mounts a remotely hosted directory as a drive in Windows. Unfortunately, it doesn't run under 64-bit Windows 7. Using Windows 7's "XP Mode," though, the app works just fine in this virtualized 32-bit environment. The mounted drive displays and is accessible in XP Mode's virtualized XP environment. However, what I would really like is to open the mounted network drive in XP Mode directly from Windows 7 (even if I can't drag and drop). XP Mode allows you to launch applications installed in the virtualized XP environment from shortcuts in Windows 7. However, I can't find a way to launch Windows Explorer or specific mapped drives on the virtualized XP environment from shortcuts in Windows 7. Can anyone provide instructions to create a shortcut in Windows 7 to a network drive mapped in the virtualized XP environment of XP Mode?

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  • Is my Windows partition too far down on the disk?

    - by Trevor Alexander
    I have /boot/ on /dev/sda1 (1GB), followed by my Linux root LVM on /dev/sda2 (1.3GB). Finally, I installed Windows 7 on /dev/sda3 in the remaining 700GB of space. When I select Windows 7 in the grub menu, I get something like the following error and am thrown to grub4dos: find --set-root --ignore-floppies --ignore-cd /bootmgr Error 15: file not found Unable to locate necessary tables for adjustment. None of the options in grub4dos return anything but the above error. I heard that 1TB is the upper limit for locating Windows 7 partitions; is this true? How can I fix the above?

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  • IIS 404 custom error

    - by Greg B
    I've deployed an ASP.NET 3.5 app to a 64bit Windows 2003 R2 server. In the web.config I have the following <customErrors mode="RemoteOnly" defaultRedirect="/404/"> <error statusCode="404" redirect="/404/"/> <error statusCode="500" redirect="/500/"/> </customErrors> In the website properties in IIS Manager I have set the 404 and 500 errors to Type = "URL" and the same URLs as in the web.config. I have a wildcard application map to the .NET 2.0 aspnet_isapi.dll with "Verify file exists" turned off. If I try to hit a fake .aspx file I successfully get sent to the 404 page. I belive this is because there is an explicit mapping for .aspx to the .NET DLL. If I try to access a fake directory I simply recieve a plain text response saying: The system cannot find the file specified. It would appear that these requests for directories are not being routed through the .NET pipeline, which is what I would expect (and need) to happen becuase of the wildcard application mapping. Any ideas?

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  • Close all Mac Terminal windows, but the one running a script

    - by Greg Brown
    I am trying to create a shell script that runs a python simulation programing in 4 terminal windows. I have the script that launches the program four times in four separate terminal windows(total of 5 windows, 4 for the python programs, and one to control the other terminal windows). I want to now create a script that I can run in the control terminal window that closes and kills the programs of the other four terminal windows, but still have the control one open. What I have so far is something like this #!/bin/sh osascript -e 'tell app "Terminal" do script "killall python" end tell' osascript -e 'tell app "Terminal" to quit' osascript -e 'tell app "Terminal" to open' The problem is that the last line doesn't work because it closes all the windows including the one the script is executing in. I am not really familiar with shell or apple script so any help would be welcomed. I posted on Stack, but I think this might be a better place for an automation type question. Thanks

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  • Install php-fpm + php-mysql + MariaDB on Centos from repos

    - by Alexander
    I try to take CentOS 6.4 x64 and install nginx w/ php-fpm on it (and that's easy part, no problem at all), then add php-mysql package and MariaDB as a mysql drop-in replacement. And here I face the hang... I've added epel, nginx and remi repos, add priority=10 line to its .repo files, and now as I install MariaDB-server the dependency also brings me MariaDB's "common" package. Then, as I try to install php-mysql, I see file /usr/share/mysql/french/errmsg.sys from install of MariaDB-server-5.5.27-1.x86_64 conflicts with file from package mysql-libs-5.5.28-1.el6.remi.x86_64 warnings. If I deinstall MariaDB server, I'm able to install mysql-libs and php-mysql, but it won't allow me to install MariaDB later. Is there any way to escape that (infinite) loop? I believe the solution is simple but still can't see it. Please help to install php-fpm + php-mysql and MariaDB as DB server!

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  • Hyper-V Manager right clicking on remote VM causes MMC error

    - by Greg Bray
    I have a Windows 2008 R2 Enterprise Server with SP1 that I log into and use to manage virtual machines running on multiple HyperV servers on our domain. Sometimes when I right click on a remote VM the HyperV Manager will crash and display the following error message: If I use the Actions menu on the lower right it works just fine, but for some reason right clicking cause MMC to stop working. Is there any way to fix this issue? Here are the full details of the error message. Description: Stopped working Problem signature: Problem Event Name: CLR20r3 Problem Signature 01: mmc.exe Problem Signature 02: 6.1.7600.16385 Problem Signature 03: 4a5bc808 Problem Signature 04: Microsoft.Virtualization.Client Problem Signature 05: 6.1.0.0 Problem Signature 06: 4ce7c9e3 Problem Signature 07: 342 Problem Signature 08: 1f Problem Signature 09: System.OverflowException OS Version: 6.1.7601.2.1.0.274.10 Locale ID: 1033 Read our privacy statement online: http://go.microsoft.com/fwlink/?linkid=104288&clcid=0x0409 If the online privacy statement is not available, please read our privacy statement offline: C:\Windows\system32\en-US\erofflps.txt

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  • Force Windows 7 to pin a file with no extension to the Jump List for Notepad

    - by Greg Bray
    I want to add the "C:\Windows\System32\drivers\etc\hosts" file to the Jump List for notepad.exe on a Windows 7 machine, but since the file does not have an extension there is no default program associated with it. This means it never shows up in the recent list and you also cannot drag it to the task bar to manually pin it to the start list. I've had problems with jump lists before, and there are ways to use the Registry or File system to change how Jump Lists work, but I haven't seen anything to manually edit a jump list yet. Is there any way to force an item to be pinned to the jump list when that item does not have a program associated with it?

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  • How to connect to a Virtualbox guest from the host when network cable unplugged

    - by Greg K
    I'd like to work offline (I'm flying to the US twice this month), to do this I need access to a linux development server. When I work from home I boot a VirtualBox VM and that acts as my dev server for the day (providing Apache, PHP & MySQL to run my server side code). However, I'd like to work with my VM when I'm not connected to a network. I have my Ubuntu VM guest set up with a bridge connection so it can serve HTTP and provide SSH access from inside my local network. I've tried to manually configure my network settings on both Mac OSX (the host) and Ubuntu (the guest) but I can't even ping my own NIC address (127.0.0.1 can, 192.168.21.x I can't) in OS X when I unplug the cable. Manual network settings: $ ifconfig en0 en0: flags=8963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500 ether 00:xx:xx:xx:xx:xx inet 192.168.21.5 netmask 0xffffff00 broadcast 192.168.21.255 media: autoselect (100baseTX <full-duplex,flow-control>) status: active I can ping localhost fine, as well as my VM (.20) and SSH too. $ ping 192.168.21.5 PING 192.168.21.5 (192.168.21.5): 56 data bytes 64 bytes from 192.168.21.5: icmp_seq=0 ttl=64 time=0.085 ms 64 bytes from 192.168.21.5: icmp_seq=1 ttl=64 time=0.102 ms 64 bytes from 192.168.21.5: icmp_seq=2 ttl=64 time=0.100 ms 64 bytes from 192.168.21.5: icmp_seq=3 ttl=64 time=0.094 ms $ ping 192.168.21.20 PING 192.168.21.20 (192.168.21.20): 56 data bytes 64 bytes from 192.168.21.20: icmp_seq=0 ttl=64 time=0.910 ms 64 bytes from 192.168.21.20: icmp_seq=1 ttl=64 time=1.181 ms 64 bytes from 192.168.21.20: icmp_seq=2 ttl=64 time=1.159 ms 64 bytes from 192.168.21.20: icmp_seq=3 ttl=64 time=1.320 ms Network cable unplugged: $ ifconfig en0 en0: flags=8963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500 ether 00:xx:xx:xx:xx:xx media: autoselect status: inactive $ ping 192.168.21.5 PING 192.168.21.5 (192.168.21.5): 56 data bytes ping: sendto: No route to host ping: sendto: No route to host Request timeout for icmp_seq 0 ping: sendto: No route to host Request timeout for icmp_seq 1 Does OS X disable the NIC when the network cable is unplugged? Any way to stop it doing this?

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  • Copying email with qmail and Plesk

    - by Greg
    I need to keep a copy of all outgoing and incoming email (for a single domain if possible) using qmail or Plesk. I can't recompile qmail, so qmailtap is out of the question, as is setting QUEUE_EXTRA in extra.h. I'm pretty sure it should be possible with Plesk's mailmng utility, aka Mail Handlers but I'm having trouble getting them to work. I've registered 2 hooks: incoming hook ./mailmng --add-handler --handler-name=incoming --recipient-domain=example.com --executable=/xxx/incoming.sh --context=/xxx/incoming/ --hook=before-local incoming.sh #!/bin/bash # The email is passed on stdin - grab it to a variable e=`cat -` # $1 = context (/xxx/incoming) # $3 = recipient ([email protected]) # Create /xxx/incoming/[email protected] mkdir -p $1$3 # Save the email to /xxx/incoming/[email protected]/0123456789.txt echo "$e" > $1$3/`date +%s%N`.txt # Echo PASS to stderr echo 'PASS' >&2 # Echo the email to stdout echo "$e" outgoing hook # ./mailmng --add-handler --handler-name=outgoing --sender-domain=holidaysplease.com --executable=/xxx/outgoing.sh --context=/xxx/outgoing/ --hook=before-remote The outgoing.sh file is the same as incoming.sh, except replace $3 (recipient) with $2 (sender). The incoming hook does work, but saves 2 copies of each email - one before and one after SpamAssassin has run. The outgoing hook doesn't seem to get called at all. So finally, my questions are: How can I make the incoming hook save only a single copy (preferably after SpamAssassin has run)? How can I get the outgoing hook to work?

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  • Windows PowerShell ISE doesn't import PSCX 2.0 module

    - by Alexander
    Hi, i am using Powershell 2.0 with the PSCX 2.0 module. When writing PS scripts inside Windows PowerShell ISE no Cmdlets from the PSCX module are availible. For example running "Get-DriveInfo" from Windows PowerShell ISE would cause an error. Running "Get-DriveInfo" from Powershell works fine. I guess Windows PowerShell ISE doesn't load my PS profile (this would be mad). Does anyone know why and what to do to get it work?

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  • sharepoint list permissions

    - by Alexander Pavluchenko
    please help with following task: i have sharepoint list, all participants see only own records (they are can create, modify and read only own records), i need to give permissions for two users for editing each other records only, and not allow to see other users records. is ir possible to do with Sharepoint?

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