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• Slow transfer speed between two servers

  - by Linux Guy

  I have two servers both network cards speed is 10Gbps The inbound bandwidth between two servers is 10Gbps , the outbound bandwidth internet bandwidth is 500Mpbs Both servers using public ip addresses in public and private network Both servers transfer and connection on nginx port , and the server B used for streaming media , like youtube stream videos I check the transfer speed using iperf utility From Server A to Server B # iperf -c 0.0.0.1 -p 8777 ------------------------------------------------------------ Client connecting to 0.0.0.1, TCP port 8777 TCP window size: 85.3 KByte (default) ------------------------------------------------------------ [ 3] local 0.0.0.0 port 38895 connected with 0.0.0.1 port 8777 [ ID] Interval Transfer Bandwidth [ 3] 0.0-10.8 sec 528 KBytes 399 Kbits/sec My Current Connections in Server B # netstat -an|grep ":8777"|awk '/tcp/ {print $6}'|sort -nr| uniq -c 2072 TIME_WAIT 28 SYN_RECV 1 LISTEN 189 LAST_ACK 139 FIN_WAIT2 373 FIN_WAIT1 3381 ESTABLISHED 34 CLOSING Server A Network Card Information Settings for eth0: Supported ports: [ TP ] Supported link modes: 100baseT/Full 1000baseT/Full 10000baseT/Full Supported pause frame use: No Supports auto-negotiation: Yes Advertised link modes: 10000baseT/Full Advertised pause frame use: No Advertised auto-negotiation: Yes Speed: 10000Mb/s Duplex: Full Port: Twisted Pair PHYAD: 0 Transceiver: external Auto-negotiation: on MDI-X: Unknown Supports Wake-on: d Wake-on: d Current message level: 0x00000007 (7) drv probe link Link detected: yes Server B Network Card Information Settings for eth2: Supported ports: [ FIBRE ] Supported link modes: 10000baseT/Full Supported pause frame use: No Supports auto-negotiation: No Advertised link modes: 10000baseT/Full Advertised pause frame use: No Advertised auto-negotiation: No Speed: 10000Mb/s Duplex: Full Port: Direct Attach Copper PHYAD: 0 Transceiver: external Auto-negotiation: off Supports Wake-on: d Wake-on: d Current message level: 0x00000007 (7) drv probe link Link detected: yes The problem is : as you can see from iperf utility, the transfer speed from server A to server B slow when i restart network service the connection will be ok , after 2 minutes , it's getting slow How could i troubleshoot slow speed issue and fix it in server B ? Notice : if there any other commands i should execute in servers for more information, so it might help resolve the problem , let me know in comments

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• General logging won't work in MySQL

  - by leonstr

  I saw on SF that there's an option in MySQL to log all queries. So, in my version (mysql-server-5.0.45-7.el5 on CentOS 5.2) this appears to be a case of enabling the 'log' option, so I edited /etc/my.cnf to add this: [mysqld] datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock user=mysql old_passwords= log=/var/log/mysql-general.log [mysqld_safe] log-error=/var/log/mysqld.log pid-file=/var/run/mysqld/mysqld.pid I then created the file and set permissions: # touch /var/log/mysql-general.log # chown mysql. /var/log/mysql-general.log # ls -l /var/log/mysql-general.log -rw-r--r-- 1 mysql mysql 0 Jan 18 15:22 /var/log/mysql-general.log But when I start mysqld I get: 120118 15:24:18 mysqld started ^G/usr/libexec/mysqld: File '/var/log/mysql-general.log' not found (Errcode: 13) 120118 15:24:18 [ERROR] Could not use /var/log/mysql-general.log for logging (error 13). Turning logging off for the whole duration of the MySQL server process. To turn it on again: fix the cause, shutdown the MySQL server and restart it. 120118 15:24:18 InnoDB: Started; log sequence number 0 182917764 120118 15:24:18 [Note] /usr/libexec/mysqld: ready for connections. Can anyone suggest why this isn't working?

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• Computer does not switch on after power outage

  - by cristian

  VOLTAGE DROP OFF FOR PC does not restart The other day my pc was turned off due to power outage. Since that time the computer would not turn on again, no sign of life, it seems dead. I did several tests, changed the power outlet and disconnect the wires ... also I have reseated the cards ... but the result is that nothing changes. What can I do? Could there may be damage to the hardware due to the power outage? Note: the voltage drop is not due to a lightning storm and so is not due to damaged components (burnt card etc ...) Original Text: l'altro giorno il pc mi si è spento improvvisamente per calo tensione.... da quel momento non si è piu' riacceso...nessun segnale di vita...sembra proprio morto. Ho fatto diverse prove, cambio presa di alimentazione, scollegare i fili...insomma ho "mischiato le carte"...ma il risultato è che non cambia nulla. Cosa posso fare? cosa puo' essere successo? Possono esserci danni hardware per il calo di tensione? NB: il calo di tensione non e' dovuto ad una saetta e quindi escluderei danni causa temporale (bruciature scheda ecc...) Grazie mille

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• WHS - Windows Update Failure

  - by Kyle B.

  Clicking "Update Now..." inside my EX470 control panel for Windows Update produces the following error message: "Windows Home Server updates installation can not complete. Please try again later. If the problem persists, please restart the server." I have rebooted the server numerous times, and I have also used remote desktop to connect to the machine to perform the update this way, however the browser is unable to pull up http://windowsupdate.microsoft.com. This is very strange behavior because I am able to access all other sites (gmail.com, serverfault.com, etc). Would it be possible for someone to explain to me how I can check to see what is blocking the connection of this device, which apparently has a valid internet connection, to the Microsoft Windows Update site? note #1 Using the shortcut: %SystemRoot%\system32\wupdmgr.exe does not work either. It says "Connecting to 65.55.200.155..." but nothing ever happens. This is strange because all other sites seem fine. Also, I can connect to windowsupdate.microsoft.com on my local desktop so I know this is running as well

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• Limit Apache 2 Memory Usage

  - by UltraNurd

  I am running a hobby webserver off of an ancient Blue & White G3/300 running Debian PPC Squeeze 2.6.30. The performance is okay for a while after a restart, but it eventually gets more and more bogged down. Right now it's at 76 days uptime, and the main culprit seems to be the memory usage of 10+ apache2 processes. I think I need to lower the values for StartServers, MinSpareServers, and/or MaxSpareServers, but I'm not sure which one to adjust, and there are three sections for each depending on which mpm module is in use. How do I tell which of the following sections I need to change, and what are some reasonable values given that the box has 448 MB physical memory (weird upgrade history of one each 64, 128, and 256 sticks)? <IfModule mpm_prefork_module> StartServers 5 MinSpareServers 5 MaxSpareServers 10 MaxClients 150 MaxRequestsPerChild 0 </IfModule> <IfModule mpm_worker_module> StartServers 2 MinSpareThreads 25 MaxSpareThreads 75 ThreadLimit 64 ThreadsPerChild 25 MaxClients 150 MaxRequestsPerChild 0 </IfModule> <IfModule mpm_event_module> StartServers 2 MaxClients 150 MinSpareThreads 25 MaxSpareThreads 75 ThreadLimit 64 ThreadsPerChild 25 MaxRequestsPerChild 0 </IfModule> There aren't any other instances of StartServers in my apache2.conf, but none of those mpm modules appear in mods-available or mods-enabled. Ideas? Thanks!

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• Windows 8 auto-hibernate from sleep not working on Retina MacBook Pro

  - by frenchglen

  I have a similar question to this one. Only my context is the 15" Retina MacBook Pro - and Windows 8. I have just the original Mac OS X Mountain Lion on there, then Windows 8 via Bootcamp. no rEFIt installed. (I just press ALT every time I restart windows, actually as a security measure to stop tech-unsavvy thugs, who, if the laptop is stolen, think it's only a mac and don't discover my Windows as quickly as they would've, and by that time I remotely activate various anti-theft mac apps and nab them that way). SO: like the related question asks, why isn't it behaving like it should? The Windows 7 FAQ states: Will sleep eventually drain my laptop battery? If your laptop battery charge gets critically low while the computer is asleep, Windows automatically puts the laptop into hibernation mode. But this is just not happening - on my rMBP Windows 8. It seems EVERY time I set the laptop to sleep (when it reaches 10%), then arriving home and plugging it in and hoping to simply resume my work, it does NOT save the session to disk and I lose ALL my work. Who's fault is it? Win 8's (a bug, grr)? Or Apple's EFI system (maybe fixable via editing EFI options/do I have to install refit to make it work perhaps?) Or maybe changing windows power options can somehow fix the problem? Thanks for your help.

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• Windows file locks allowing multiple users to write to open file over network

  - by JPbuntu

  I have 6 windows computers (xp,vista,7) that need to access a samba share (Ubuntu 12.04). I am trying to make it so only one client can open a file at a given time. I thought this was pretty standard behavior of file locks, but I can't get it to work. The way it is right now a file can be open by two users, and changed and saved by either one of them. The last file saved overwrites what ever changes the other user made. At first I thought this was a Samba configuration problem, but I get this behavior even between two windows machines. So far I have only tested: Windows Xp Windows Vista Windows XP Samba << Windows Vista and both give the same behavior. When I tested the Samba configuration, I had set strict locking = yes and get errors logged like this: close_remove_share_mode: Could not get share mode lock for file _prod/part_number_list_COPY.xlsx Eventually all of the files are going to be moved onto the Samba share, so that is the configuration I am most concerned about fixing. Any ideas? Thanks in advance. EDIT: I tested an excel file again, and it is now working properly in both above mentioned cases, I am also no longer getting the above mentioned error. I don't know what happened, perhaps a restart fixed it? (also works with strict locking = no) Although I still need to find a solution for the CAD/CAM files we use, the software is Vector and it does not seem to be using file locks. Is there any software that I can use to manage these files, so two people can't open/edit them at a time? Maybe a windows application that forces file locks? Or a dirt simple version control system? (the only ones I have seen at are too complicated for our needs).

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• compose-key mappings differ between gtk and qt apps

  - by intuited

  I'm noticing that there is an inconsistency in the output of one of the compose-key combos. When I type ( [Compose] . . ) under Chrome, gedit, gnome-terminal, or roxterm I get the character '?'. This is a small raised dot: $ echo -n '?' | xxd 0000000: cb99 .. When I type the same combo under konsole, yakuake, or kate, I get the character '…'. This is an ellipsis: $ echo -n '…' | xxd 0000000: e280 a6 ... This is not a font issue: if I copy-paste the characters from an app using one toolkit to an app using the other, its appearance is maintained. I use a few other combos pretty regularly and they seem to work consistently across toolkits. I think this is a pretty recent phenomenon. I upgraded from Ubuntu 8.10 to 9.10 fairly recently so this might be related. I'm not sure if this will reoccur if I restart X, and I'd rather not find out. Can someone explain how this is possible, and what I can do to resolve it? I'd like to have the ellipsis appear in all apps when that combo is entered.

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• localhost won't load after adding config data to httpd

  - by OldWest

  I am not very experienced with configuring httpd, and I am following a tutorial to view my site w/ domain name under localhost. My localhost just blanks out and my apache services won't restart. I checked all of my paths and they are correct. I am editing the w*indows/system32/drivers/etc/host*s file and my apache httpd file. This is what I am putting in my hosts file: 127.0.0.1 www.cars_v1.0.com.localhost And in the footer of my httpd file I am putting this: <VirtualHost 127.0.0.1:80> ServerName www.cars_v1.0.com.localhost DocumentRoot "C:\wamp\www\symfony\cars_v1.0\web" DirectoryIndex index.php <Directory "C:\wamp\www\symfony\cars_v1.0\web"> AllowOverride All Allow from All </Directory> Alias /sf C:\wamp\www\symfony\cars_v1.0\lib\vendor\symfony-1.4.8\data\web\sf <Directory "C:\wamp\www\symfony\cars_v1.0\lib\vendor\symfony-1.4.8\data\web\sf"> AllowOverride All Allow from All </Directory> </VirtualHost>

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• Get details / solve issue with a kernel panic?

  - by Joseph

  I have a Lenovo T430 running Linux Mint 13 (MATE): joseph:~$ uname -a Linux joseph-T430-LM 3.2.0-23-generic #36-Ubuntu SMP Tue Apr 10 20:39:51 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux I installed Mint immediately after getting the laptop about two weeks ago, and have noticed that about once a day, the computer will completely freeze up- I can't use Ctrl+Alt+Backspace to restart X, I can't use Ctrl+Alt+F1 to get a text only terminal, can't move mouse, can't type, and if any music was playing it just gets stuck in about a 1-second loop. There is a Windows partition, but I haven't had any issues in Windows. I couldn't find a common thread between the freezes, they were seemingly random (sometimes right after I clicked the mouse, sometimes not; sometimes with Pandora/flash being used, sometimes not, etc). I assume they're kernel panics since it completely locks up, but the laptop doesn't have a capslock or scroll lock LED. It is on a dock and I do have a USB keyboard, but the scroll lock/capslock lights do not flash when it happens (not sure if this is indicating its not a kernel panic, or if the kernel panic just wouldn't illuminate the LEDs on a usb keyboard attached to a laptop dock). This was annoying but not terrible. However, I've found a way to reproduce it. I have a particular CSV file that when I open up in LibreOffice Calc and scroll around, the same thing happens- complete lock up. I really need to use this file, so I'd like to fix the issue, but at the least it's given me a test case to work with. So, having a case where I can cause this issue, what can I do to better find out what's going on? I've looked in /var/log/syslog but haven't found anything seemingly useful. Any thoughts?

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• MS SQL Server slows down over time?

  - by Dave Holland

  Have any of you experienced the following, and have you found a solution: A large part of our website's back-end is MS SQL Server 2005. Every week or two weeks the site begins running slower - and I see queries taking longer and longer to complete in SQL. I have a query that I like to use: USE master select text,wait_time,blocking_session_id AS "Block", percent_complete, * from sys.dm_exec_requests CROSS APPLY sys.dm_exec_sql_text(sql_handle) AS s2 order by start_time asc Which is fairly useful... it gives a snapshot of everything that's running right at that moment against your SQL server. What's nice is that even if your CPU is pegged at 100% for some reason and Activity Monitor is refusing to load (I'm sure some of you have been there) this query still returns and you can see what query is killing your DB. When I run this, or Activity Monitor during the times that SQL has begun to slow down I don't see any specific queries causing the issue - they are ALL running slower across the board. If I restart the MS SQL Service then everything is fine, it speeds right up - for a week or two until it happens again. Nothing that I can think of has changed, but this just started a few months ago... Ideas? --Added Please note that when this database slowdown happens it doesn't matter if we are getting 100K page views an hour (busier time of day) or 10K page views an hour (slow time) the queries all take a longer time to complete than normal. The server isn't really under stress - the CPU isn't high, the disk usage doesn't seem to be out of control... it feels like index fragmentation or something of the sort but that doesn't seem to be the case. As far as pasting results of the query I pasted above I really can't do that. The Query above lists the login of the user performing the task, the entire query, etc etc.. and I'd really not like to hand out the names of my databases, tables, columns and the logins online :)... I can tell you that the queries running at that time are normal, standard queries for our site that run all the time, nothing out of the norm.

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• Apache2 MPM-prefork MPM-worker multiple instances on same Ubuntu host machine possible?

  - by user60985

  I have a live Apache2/MPM-Worker instance running Django. I want to also run an Apache2/MPM-prefork instance to run some Drupal6 applications on the same host machine and utilize a vast selection of PHP modules that run on the prefork model. I plan to use my MPM-worker instance to reverse proxy to the Apache2-prefork instance for URLS starting with myhost.com/drupal6/. It seems theoretically doable/configurable by having the second Apache2-prefork instance configured to listen on an internal port, say 127.0.0.1:8080 and having my current Apache2-worker configured to proxy pass and reverse pass to it for the 'drupal6' URLs. However, how do I compile or install the apache2-prefork version so it has a different executable name than /usr/sbin/apache2, for example /usr/sbin/apache2p, and so apache2ctl has a different name, say apache2pctl, and that apache2pctl invokes the /usr/sbin/apache2p instead of /usr/sbin/apache2... and so on down the line (eg /etc/apache2p) so I can start and restart my two instances independently? As I understand it, no one executable of 'apache2' can be compiled with both the MPM-prefork and MPM-worker modules, so it seems I need two separate versions of the apache2 MPM flavors. But then I need to invoke and control them by separate names, I assume. I looked at the configuration options for apache2 and I am a bit queasy about compiling a second apache2 version with prefork because I am not sure I can set all the options so that none of my current apache2 files is overwritten. Is there a way? Is there a standard solution to separately installing and controlling prefork and worker apache2 executables on the same machine without them stepping on each other during installation or operation?

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• Black Screen and System Hang - Possibly CPU overheating

  - by Mahesh

  I have this old computer - P4 2.0ghz, 1.2GB RAM and onboard graphics(no external card), 80GBHDD. It has xubuntu installed on it and it regularly hangs when it takes more system resources for say like graphical programs, too many tabs on firefox etc. It just either hangs the system or shows black screen. Tested if it was issue of HD but it wasn't because i have used linux livecd and problem is still the same even if I have removed the HD. I have also tested with USB linux (puppy linux and ubuntu linux on 8gb drives). Tested windows XP as well on this HD and results are the same. Tested another HD on this machine, results are still the same with it. System hangs or goes black screen and requires restart. I thought later it could be thermal heat issue and then applied thermal paste on heatsink but still it fails to work for me. It continues to show symptoms. Another thing which was yet to be tested is changing of CPU fan which was not done because I have not found any fan for old pentium 4 machine in the market. I have to hit online stores (but i am in india and it's hard to find it in online shops which can deliver it to me). So far I don't see this as HD or Monitor or OS issue because I have tested with other HD and results are the same. So it could be either CPU fan or motherboard? What could be possible issue with the hardware?

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• I must clear my cmos to be able to boot

  - by Fredou

  I have this Asus p7p55d-e pro for about 8 months(got it last July) and for this last 3-4 days I cannot boot without clearing my CMOS what I have is: Seasonic M12D 750W ASUS P7P55D-E Pro Intel Core i5 760 Quad Core Processor Lynnfield LGA1156 XFX GeForce® 8800 GT Alpha Dog 512MB DDR3 Standard (PV-T88P-YDF4) 2x Corsair XMS3 CMX4GX3M2A1600C7 4GB DDR3 2X2GB DDR3-1600 CL 7-8-7-20 I tried to remove all the unnecessary stuff: HD/dvd/pci card/usb cable/etc I tried with only 1 dimm filled, instead of my 4, each one individually it didn't work I tried changing the battery, here goes a few dollars to nowhere, didn't work if I don't reset the CMOS it sometime stock on RAM led, sometime on BOOT DEVICE led, when this happen, it stuck on CPU speed detection when I boot right after the reset, i MUST click on the F2 option (boot with default bios setting) if i go into the bios and save/restart, i have to reset it again when booted, everything is rock solid stable, tried memtest, cpu stress, etc, etc. without issue what should be my next step? trying a new psu? (i need to find one..) doing rma? (i need this mb since it's my only computer...) something else?

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• Windows 7: Windows Firewall: Logging/Notifying on Outgoing Request Attempts

  - by Maxim Z.

  I'm trying to configure Windows Firewall with Advanced Security to log and tell me when programs are trying to make outbound requests. I previously tried installing ZoneAlarm, which worked wonders for me with this in XP, but now, I'm unable to install ZA on Win7. My question is, is it possible to somehow monitor a log or get notifications when a program tries to do that if I set all outbound connections to auto-block, so that I can then create a specific rule for the program and block it.? Thanks! UPDATE: I've enabled all the logging options available through the Properties windows of the Windows Firewall with Advanced Security Console, but I am only seeing logs in the %systemroot%\system32\LogFiles\Firewall\pfirewall.log file, not in the Event Viewer, as the first answer suggested. However, the logs that I can see only tell me the request's or response's destination IP and whether the connection was allowed or blocked, but it doesn't tell me what executable it comes from. I want to find out the file path of the executable that each blocked request comes from. So far, I haven't been able to.

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• Plesk 10 - creating and using vhost.conf

  - by MrFidge

  I'm having some issues setting up and using a vhost.conf for one of my domains. So far none of the domains have required any extra configuration but now I need to use a PEAR module, so I'm looking to include /usr/share/pear in the PHP settings for the domain. vhost file created in /var/www/vhosts/domain.com/conf/vhost.conf <Directory /var/www/vhosts/domain.com/httpdocs> php_admin_value include_path ".:/usr/share/pear" </Directory> I then restart Plesk using: /usr/local/psa/admin/sbin/websrvmng --reconfigure-vhost --vhost-name=domain.com Or as plesk says that command is obsolete in Plesk 10 I've tried using /usr/local/psa/admin/sbin/httpdmng --reconfigure-domain domain.com And for good luck I've restarted apache too each time. Net result - none of the PEAR includes work unless I edit the include_path in /etc/php.ini! Any tips on how to get this MOFO working? I've had a look through the documentation but TBH I just don't have time to read 40 pages of Plesk manual for one line of code, this can't be that hard, surely! Thanks for any pointers, H

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• Windows xp mapped drives disconnect from Windows 7 on Peer to Peer network

  - by Kathryn Codo

  I have a 5 user peer to peer network. 2-XP machines, 3- Windows 7 machines and a Windows 7 machine acting as the file server. I have NO issues with the Windows 7 machines staying connected via the mapped drives to the "server". However, once a day the 2 XP machines will not connect to the Windows 7 machine "server" via the mapped drives. I must restart the "server" in order to see the server and access the files via the mapped drives or Explorer. I have tried the persistent : yes command in NET USE, on the XP machines and also setting a static IP address on the "server". I've turned the firewall off on the "server:, no difference so I turned the firewall back on. No interruption occurs with the internet when this happens, just can't see the server. Again, the Windows 7 users are unaffected. I have gone into the advanced network settings on the "server" and added read/write permissions for Everyone as well as the users of the XP machines. I have double checked that we are all on the same WORKGROUP. I'm at a loss. It seems to happen around mid-day and I've not been able to find any activity that is happening at this time (Like someone plugging in a thumbdrive). Any suggestions would be greatly appreciated as my client is running old XP software he no longer has the disks for and needs for his engineering firm.

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• Server 2008 R2 DNS Lockup / Stops Resolving Internet Names

  - by Richard Maynard

  We've deployed our first 2008 R2 server on a client site which has replaced their existing 2003 DC. This server provides DNS resolution services to all client machines on that site for general internet usage. Since using the 2008 R2 DNS services we have noticed every couple of days the DNS server starts timing out when requests to certain sites are made (google is the only example I can provide at this time although it seems to be larger sites with problems rather than small - CDN compatiblity issue?). When you restart the DNS Server service then resolution returns to normal... just only for a day or so. Is anybody aware of any significant changes to the DNS server architecture or configuration out of the box in R2 that may explain this intermittent behaviour? I have already tried the fix listed here to no avail: http://weblogs.asp.net/owscott/archive/2009/09/15/windows-server-2008-r2-dns-issues.aspx The following PS command prompt info illustrates the issue: PS C:\Users\Administrator.UK> nslookup Default Server: s8209001.uk.kingdomfaith.com Address: 10.1.3.4 > www.google.com Server: s8209001.uk.kingdomfaith.com Address: 10.1.3.4 Non-authoritative answer: Name: www.l.google.com Addresses: 66.102.9.99 66.102.9.104 66.102.9.105 66.102.9.103 66.102.9.147 Aliases: www.google.com > www.google.co.uk Server: s8209001.uk.kingdomfaith.com Address: 10.1.3.4 * s8209001.uk.kingdomfaith.com can't find www.google.co.uk: Server failed

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• Random Hard Freeze of Windows 7 (is Kaspersky to be blamed for this?)

  - by Christian Ivicevic

  The last few weeks I experienced a new strange behavior of my computer. Sometimes Windows 7 just freezes with no real reason at all. While listening to music for example the playback hangs and you can hear a very nasty sound. Neither mouse nor keyboard input is handled and everything is just stuck. Using Ubuntu this does not happen, so I think it is just a matter of driver issues or a Windows 7 bug. Furthermore I am really suspicious about Kaspersky (Internet Security 11) and so I let it perform a complete virus scan while no other app is running. At about 50% it happened again and I needed to restart the computer by holding the power button the bad way... A really weird thing is that playing Skyrim this happened once, however music playback did not stop. Only the framerate dropped to 0 and sometimes for a few seconds I am able to move. Therefore I am really confused as furthermore no bluescreen pops up. Memtest told me that everything seems to be alright... Can anyone explain me which data you need about my hardware and software (and which tools tools to use to gather the informatik) to be able to provide any help on my problem?

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• Windows 2008 Standard upgrade to Windows 2008 Enterprise failure

  - by Archit Baweja

  Sidestory, I was in the process of setting up a second Exchange 2010 server for DAG support, when I realized that my box needed Windows 2008 Enterprise edition. The box currently has Windows 2008 Standard Windows update including SP2 Exchange 2010 with CAS, HT, Mailbox roles Domain Services role File Services role. When I try to upgrade to Windows 2008 Enterprise, I initially got a "your current version of windows is more recent than the intallation media", something to that effect. My first guess was it may be SP2 related, so I uninstalled SP2, restarted and tried again. This time it gave me an error to the effect Windows could not configure one or more windows components. Please restart and try the update again. This was at the last stage of the Windows 2008 Enterprise install when it says "Completing installation". So I removed Domain Services role (including demoting it as a DC). However I get the same error again. Anyone see something like this before and have any suggestions? Also , is there a log file the windows upgrade program spits out that I can consult to see what component exactly is interfering? Update 1 Based on some googling I finally found the setup log file, and it seems that Windows setup had an issue determining the .Net 3.0 "feature" being installed or uninstalled. So based of of a win7/vista technet article I'm going to retry the upgrade after removing the .Net 3.0 feature.

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• System hangs while rebooting on Debian...

  - by Usman

  Hi, I have Debian (Kernel 2.6.26-2-686) installed on two computers. On one of them it reboots quite finely but I am having following problem with rebooting Debian on my second computer. When i type reboot at the Linux prompt, following messages appear and system hangs up after saying "Restarting System": Broadcast message from root@myname (tty1) (Sun Jan 17 11:23:26 2010) The system is going down for reboot NOW! INIT: Switching to runlevel: 6 INIT: Sending processes the TERM signal Saving system clock Stopping enhanced syslog: rsyslogd. Asking all remaining processes to terminate...done. Deconfiguring network interfaces...done. Cleaning up ifupdown.... Deactivating swap...done. [ 31.789103] Restarting System. _ Normally when the sytem is busy "" sign blinks but "" at the last line above does not blink which shows, the system hanged up. I tried all keys but the screen is still frozen at the same point. The difference that I noted between my two computers is that I don't have ACPI support in the BIOS of the system which is giving me this error whereas the BIOS of my first computer do have ACPI support on which Debain do not give this restart-hanging problem. I have also disabled running the acpid script by running update-rc.d -f acpid remove but the problem still persists on the second computer. Any ideas to solve or get around this problem?

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• Cisco SA520 to Adtran 1234 no DHCP transfer

  - by Grico

  I am trying to set up a Cisco SA520 to run DHCP on my network. I have a vendor provided switch, the Adtran 1234, and it provides DHCP for our phone systems on VLAN 200. I do not have access to the Adtran, but the vendor gave me a IP on port 1 for WAN and said port 2 should be for the "trust" side should go. I did setup a mini lab where, Adtran 1 went to SA520 WAN port, and SA520 trust 1 went to my laptop. Everything worked fine, I could ping and get internet using the DHCP scope I put on the SA520. I then unplugged my computer from SA520 trust 1 and plugged it into Adtran 2. I plugged my computer into Adtran 23 and I dont get DHCP or even a link light. If I restart my machine, I get a brief link and then it dies once the machine boots. I have tried several ports on the Adtran and none seem to work. Different cables as well. However, when I plug a phone into the Adtran, the phone boot immediately and shows link. Thoughts?

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• Process killing trouble

  - by Aditya Singh

  I am trying to program a server software which involves a lot of testing on java / scala platform. Whenever i compile and execute the code. It starts listening on port 80. Sometimes i need to terminate it by Ctrl+C when it hangs. In that case, ubuntu is not freeing the port. So in order to run the process, i have to restart the machine. I see this at ps aux root 1924 0.0 0.0 5796 1660 pts/0 T 05:44 0:00 sudo scala - root 1925 0.2 1.5 491448 40796 pts/0 Tl 05:44 0:03 java -Xmx256M -Xms16M So process 1924 and 1925. I did sudo kill on both these. But then they keep on persisting even after a long time. sudo nmap -T Aggressive -A -v 127.0.0.1 -p 1-65000 Scanning localhost (127.0.0.1) [65000 ports] Discovered open port 80/tcp on 127.0.0.1 It means its still there ! sudo netstat --tcp --udp --listening --program tcp6 0 0 [::]:www [::]:* LISTEN 1925/java tcp6 0 0 ip6-localhost:ipp [::]:* LISTEN 1185/cupsd This means its 1925 - java How to kill it.

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• Magento Apache Config & Memory Issues

  - by cheshirepine

  I have a Magento installation on a VPS that is giving me a headache. This particular VPS has a reasonable spec - 2gb Memory and 50gb storage. It runs a single domain, with a single Magento install - and nothing else. About 5 months ago we started having issues. Every so often (about once every 2 or 3 weeks) the VPS would crash - all processes stopped and the only way to restart the container is via Virtuozzo. Now, however its 2 or 3 times a week. My VPS hosts confirm I am breaching the 2gb memory limit, at which point all VPS processes are killed to stop it bringing the entire node down. I have not made any config changes to it at all - I was running New Relic on it for a short while, but have removed that in case it was contributing to the issues. I can see nothing in the logs which indicates an issue and we have no CRON jobs running at the time the crashes happen. The site generates steady, but not huge amounts of traffic (averaging usually less than 100 visits per day) Is there anything in particular I should have done to the Apache or PHP configs to help? Im not a massivley experienced Apache admin, but know more than enough to solve most problems... Failing that, any other ideas that might help? Can't afford for this site to be down this much.

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• What is the correct iptables rule when NATing multiple private subnets?

  - by Jose Mendez

  I have a Centos minimal 6.5 acting as a router. eth0 is connected to a Cisco switch trunk port, allowing VLANs 200-213. I have several VLAN interfaces just as this link suggests: https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Deployment_Guide/s2-networkscripts-interfaces_802.1q-vlan-tagging.html And have IPv4 forwarding, so all my network devices from any of the networks 200-213 can communicate with each other using this linux box as their router. Problem is, I need them to access the Internet, so I added the following rule: iptables -t nat -A POSTROUTING -s 192.168.0.0/16 -j SNAT --to 1.1.1.56 1.1.1.56 is the "outside" address. This works fine, devices connected to the internal networks can ping Intertnet addresses BUT, they stop being able to talk to each other across subnets, so 192.168.211.55 can ping 8.8.8.8, but can't talk to 192.168.213.5. As soon as I do a service iptables restart to remove the rule, I can start talking across internal subnets again. What would be the correct way to set up NAT for multiple private subnets? Or maybe the correct way to set up forwarding?

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