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  • Server Clustering (Django, Apache, Nginx, Postgres)

    - by system-matrix
    I have a project deployed with django, Apache, Nginx and Postgres. The project has requirement of live data viewable to customers. The projects main points are: 1. Devices in field send data to server(devices are also like website users) after login. 2. There is background import process which imports the uploaded data in postgres. 3. The webusers of the system use this data and can send commands to the devices, which devices read when they login. 4. There are also background analysis routines running on the data. All the above mentioned setup and system is deployed on one amazon EC2 cloud machine. The project currently supports over 600 devices and 400 users. But as the number of devices are increasing with time the performance of the server is going down. We want to extend this project so that it can support more and more devices. My initial thinking is, We will create one more server like current one and divide the devices amongst these to servers. But Again We need a central user and device managment point though django admin. Any Ideas? What are the best possible ways to create a scalable architecture? How can I create a Postgres Cluster and Use it with Django, if possible?

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  • Motherboard Dying? AHCI Drive Init and boot loop intermittent failure

    - by Adam Heath
    My computer is now intermittently failing to boot up. For the last couple of days, when I turn it on it hangs on "AHCI Drive Init...", and when powered off and on again, it booted up fine. Today, it did the same but failed in a few other ways too, seemingly at random: Hangs on "AHCI Drive Init..." Boot loop (after "AHCI Drive Init..." appears for a split second (no drives listed)) Black screen (after "AHCI Drive Init..." appears for a split second, a black screen with all fans still running) The interesting part is that the above is not affected by what drives are connected, or what to. I have tried both disks, each disk individually and no disks (along with trying the primary and secondary SATA controllers), none of this has any effect on what happens. After about 20+ attempts of different combinations, it suddenly decided it would boot up into Windows, and I hadn't touched anything for about 2 cycles. Motherboard: Gigabyte GA-870A-USB3 Processor: Amd Phoenom II x6 1090T RAM: 8GB Corsair 1600 Primary Disk: Plextor 128GB SSD Secondary Disk: Western Digital Black 1TB OS: Windows 8.1 Is this my motherboard dying? Or could something else be the cause? Thanks!

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  • Apache Virtual Host with directory aliases

    - by brechtvhb
    I'm trying to set up a dynamic virtual host in apache with a directory alias pointing to a difirent path for every domain. Here's what I'm trying to achive. Say I have 2 domains: * www.domain1.com * www.domein2.com I want both to point to the same index.php file (C:/cms/index.php). Now the hard part ... I want directories or certain file types to point to a diffirent path for each domain. Example: * www.domain1.com/layout -> C:/store/www.domain1.com/layout * www.domain2.com/layout -> C:/store/www.domain2.com/layout * www.domain1.com/image.png -> C:/store/www.domain1.com/image.png * www.domain2.com/image.png -> C:/store/www.domain2.com/image.png However the admin directory should point to the same path again for all sites * www.domain1.com/admin -> C:/cms/admin * www.domain2.com/admin -> C:/cms/admin Is there a way to achieve this kind of behaviour in apache 2.2 without having to create a virtualhost entry for each new domain?

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  • VirtualBox management interface unreliability

    - by Arlen Cuss
    I'm using VirtualBox 3.2.8_OSE with 20 VMs running, and everything's going fine. I find that if I hammer the VBoxManage interface, all sorts of interesting things happen, usually necessitating either a restart of the VM in question, or of all VMs. For instance, if I use VBoxManage guestcontrol execute to run processes, after a few hours of using it maybe once or twice a minute on any given VM, it'll mysteriously start reporting VERR_NOT_IMPLEMENTED and refusing to do anything—sometimes trying to restart /usr/sbin/VBoxService on the VM itself will get it back in working order, but often it won't, and in the meantime, no data can be collected using VBoxManage. Such data includes the VM's IP, so if I hadn't recorded it earlier, I'm usually in trouble and have no option but to portscan the network for it, or kill the VM's process on the host manually and restart it. This one I haven't narrowed down yet, but it seems that even using VBoxManage guestproperty get (to retrieve a machine's IP) frequently and rapidly is enough to cause all VMs' management interfaces to die. The processes are still running fine, but VBoxManage reports them all as "powered off". In the meantime, another process somewhere in the system seems to have decided that their being powered off means they need to be powered on again, and suddenly I have 2x the number of VBoxHeadless processes running than I used to. Has anyone else seen behaviour like this? Is there any workaround? This is a serious impediment to my work, as I've had to resort to a lot of (hacky) caching of data and rate-limiting how often I call VBoxManage, just in case I accidentally bring 20 VMs to their knees.

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  • Converting PDF eBooks into a Kindle format

    - by Ender
    Over the past couple of years I've amassed quite a collection of guides, tutorials and ebooks in PDF format. A lot of these are quite useful for work, especially PDF documentation, and rather than have to be at a computer every time I want to read how to do something in Sitecore or to read through a software testing ebook I'd like to do it on my brand-spanking-new Kindle. However, even though there is now a native PDF reader on the Kindle due to the nature of PDF's they are practically unreadable. The text doesn't wrap due to how PDF's are sized and so far after a bunch of Google searches I've yet to find a viable solution to get my PDF's converted into a readable Kindle format. Sometimes these books have code or pictures/tables in them, but most of the time they're text-heavy and to be honest I'd be surprised if there wasn't a free tool to handle the converting of PDF to one of the (seemingly many) Kindle formats. So, can anyone help me out with this? EDIT: I've tried Calibre, and have checked their forums to play with some of the advanced settings, yet the solutions available seem to be extremely poor, especially if the book you're attempting to read contains equations, code, or anything outside of plain text. I've also tried Amazon's conversion service, which wasn't much help with such documents. The best way I have found so far is to build the entire thing over again in ePub or RTF format and convert to MOBI from there. This works for text-heavy books with tables, but anything technical still isn't covered. Can anyone help with this?

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  • SQL Server performance on VSphere 4.0

    - by Charles
    We are having a performance issue that we cannot explain with our VMWare environment and I am hoping someone here may be able to help. We have a web application that uses a databases backend. We have an SQL 2005 Cluster setup on Windows 2003 R2 between a physical node and a virtual node. Both physical servers are identical 2950's with 2x Xeaon x5460 Quad Core CPUs and 64GB of memory, 16GB allocated to the OS. We are utilizing an iSCSI San for all cluster disks. The problem is this, when utilizing the application under a repeated stress testing that adds CPUs to the cluster nodes, the Physical node scales from 1 pCPU to 8 pCPUs, meaning we see continued performance increases. When testing the node running Vsphere, we have the expected 12% performance hit for being virtual but we still scale from 1 vCPU to 4 vCPUs like the physical but beyond this performance drops off, by the time we get to 8 vCPUs we are seeing performance numbers worse than at 4 vCPUs. Again, both nodes are configured identically in terms of hardware, Guest OS, SQL Configurations etc and there is no traffic other than the testing on the system. There are no other VMs on the virtual server so there should be no competition for resources. We have contacted VMWare for help but they have not really been any suggesting things like setting SQL Processor Affinity which, while being helpful would have the same net effect on each box and should not change our results in the least. We have looked at all of VMWare's SQL Tuning guides with regards to VSphere with no benefit, please help!

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  • wget crawling search results of news website

    - by kiltek
    I am trying to crawl the search results of a news website using wget. The name of the website is www.voanews.com. After typing in my search keyword and clicking search, it proceeds to the results. Then i can specify a "to" and a "from"-date and hit search again. After this the URL becomes: http://www.voanews.com/search/?st=article&k=mykeyword&df=10%2F01%2F2013&dt=09%2F20%2F2013&ob=dt#article and the actual content of the results is what i want to download. To achieve this I created the following wget-command: wget --reject=js,txt,gif,jpeg,jpg \ --accept=html \ --user-agent=My-Browser \ --recursive --level=2 \ www.voanews.com/search/?st=article&k=germany&df=08%2F21%2F2013&dt=09%2F20%2F2013&ob=dt#article Unfortunately, the crawler doesn't download the search results. It only gets into the upper link bar, which contains the "Home,USA,Africa,Asia,..." links and saves the articles they link to. It seems like he crawler doesn't check the search result links at all. What am I doing wrong and how can I modify the wget command to download the results search list links (and of course the sites they link to) only ?

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  • tc u32 --- how to match L2 protocols in recent kernels?

    - by brownian
    I have a nice shaper, with hashed filtering, built at a linux bridge. In short, br0 connects external and internal physical interfaces, VLAN tagged packets are bridged "transparently" (I mean, no VLAN interfaces are there). Now, different kernels do it differently. I can be wrong with exact kernel verions ranges, please forgive me. Thanks. 2.6.26 So, in debian, 2.6.26 and up (up to 2.6.32, I believe) --- this works: tc filter add dev internal protocol 802.1q parent 1:0 prio 100 \ u32 ht 1:64 match ip dst 192.168.1.100 flowid 1:200 Here, "kernel" matches two bytes in "protocol" field with 0x8100, but counts the beginning of ip packet as a "zero position" (sorry for my English, if I'm a bit unclear). 2.6.32 Again, in debian (I've not built vanilla kernel), 2.6.32-5 --- this works: tc filter add dev internal protocol 802.1q parent 1:0 prio 100 \ u32 ht 1:64 match ip dst 192.168.1.100 at 20 flowid 1:200 Here, "kernel" matches the same for protocol, but counts offset from the beginning of this protocol's header --- I have to add 4 bytes to offset (20, not 16 for dst address). It's ok, seems more logical, as for me. 3.2.11, the latest stable now This works --- as if there is no 802.1q tag at all: tc filter add dev internal protocol ip parent 1:0 prio 100 \ u32 ht 1:64 match ip dst 192.168.1.100 flowid 1:200 The problem is that I couldn't find a way to match 802.1q tag so far. Matching 802.1q tag at past I could do this before as follows: tc filter add dev internal protocol 802.1q parent 1:0 prio 100 \ u32 match u16 0x0ed8 0x0fff at -4 flowid 1:300 Now I'm unable to match 802.1q tag with at 0, at -2, at -4, at -6 or like that. The main issue that I have zero hits count --- this filter is not being checked at all, "wrong protocol", in other words. Please, anyone, help me :-) Thanks!

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  • Copy all installed programs & files in a hard disk (which has 32 bit Windows 7) and clone/transfer it to another computer which has 64 bit Windows 7

    - by galacticninja
    I recently got a new PC which has a 64-bit Windows 7 installed. The current PC that I am using has a 32-bit Windows 7 installed. I would like to know if there is a software that can copy all my installed programs and files in the hard disk with the 32-bit Windows 7 PC and transfer it to the newer PC's hard disk which has a 64 bit version of Windows 7. This is essentially like "cloning" a hard disk but I would like to use a 64-bit OS in the target drive, instead of also using the 32-bit OS of the source drive. I would like to do this I can avoid reinstalling and reconfiguring my installed programs and files again on the new PC. If possible, I would like the new PC to work as it was in my previous PC, with the installed programs, configuration and files intact except that the OS is now 64-bit and the hard disk has a larger capacity. I have heard of programs that can clone a hard disk, but my concern is that the 32-bit Windows 7 OS will also be cloned to the new 64-bit PC. If it is not possible to transfer my installed programs and settings like the way I described, are there software that can make it easier to migrate my installed programs, their configurations and my files from a 32-bit Windows 7 PC to a 64-bit Windows 7 PC? Details: I have a SATA to USB connector/adapter to copy files in the current hard disk to the newer one. The two PCs are connected through LAN, so I can also transfer files through LAN. Both PCs only have one hard disk.

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  • Unable to connect to second name of Windows 2008 Server R2 machine from XP

    - by Tumba
    I used the command netdom computername /add:newname.domainname.com to add a second name to a server running Windows 2008 Server R2. After restarting the server, I had DNS "A" entries for both names. In addition, the second name was added to HKLM\SYSTEM\CurrentControlSet\services\LanmanServer\Parameters\OptionalNames, which I believe should have taken care of any NetBIOS resolution. From my Windows 7 workstation, I can ping both names and running net view on both names reveals the same list of resources. From Windows XP, I can ping both names, but net view only works on the first name. Running net view on the second name returns: System error 52 has occurred. You were not connected because a duplicate name exists on the network. Go to System in Control Panel to change the computer name and try again. What do I need to do to make the second name usable from XP clients? Update: I was able to resolve the problem by adding the REG_DWORD key DisableStrictNameChecking = 1 to HKLM\SYSTEM\CurrentControlSet\services\LanmanServer\Parameters, then restarting the Server service. However, I do not understand why this was necessary.

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  • Is reliability reputation of mechanical keyboards overblown?

    - by Rarst
    A while back I worked up to finally buying mechanical keyboard (~$100 range, "black" switches) and was initially quite content with purchase. However just outside first year (read it - as soon as warranty expired) it started to develop repeat issues (press once, get chain of letter repeated) on multiple keys. It doesn't react to generic cleaning (up to compressed air) and searching Internet shows noticeable amount of people with similar-to-identical issues, spanning years. This makes me severely hesitant to buy another mechanical keyboard, considering: every other keyboard I ever owned, including ultra-cheap crap managed to last longer than that typing experience is nice, but not lifechanging-fan-forever nice for me my choice of mechanical keyboards is severely limited not many brands represented in local market and primarily crazy looking gamer models russian (not to mention russian and ukrainian if possible) layout excludes international ordering price tag for a meek year of use I got our of it is plain demoralizing It is obvious mechanical keyboards have their fans, but shopping around for "best fit" or getting into multiple hundreds price tags is probably not something I am highly interested in. Considering my constraints and bad experience with reliability, is it practical for me to sink more money into buying mechanical keyboard(s) again? In other words - manufacturers are beaming about how crazy reliable mechanical keyboards are. Are active long time users of such keyboards confidently of same opinion?

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  • How can I prevent Apache from asking for credentials on non SSL site

    - by Scott
    I have a web server with several virtual hosts. Some of those hosts have an associated ssl site. I have a DirectoryMatch directive in my main config file which requires basic authentication to any directory with secured as part of the directory path. On sites that have an SSL site, I have a rewrite rule (located in the non ssl config for that site), that redirects to the SSL site, same uri. The problem is the http (80) site asks for credentials first, and then the https (443) site asks for credentials again. I would like to prevent the http site from asking and thus avoid the potential for someone entering credentials and having them sent in clear text. I know I could move the DirectoryMatch down to the specific site, and just put the auth statement in the SSL config, but that would introduce the possibility of forgetting to protect critical directories when creating new sites. Here are the pertinent declarations: httpd.conf (all sites): <DirectoryMatch "_secured_"> AuthType Basic AuthName "+ + + Restrcted Area on Server + + +" AuthUserFile /home/websvr/.auth/std.auth Require valid-user </DirectoryMatch> site.conf (specific to individual site) <DirectoryMatch "_secured_"> RewriteEngine On RewriteRule .*(_secured_.*) https://site.com/$1 </DirectoryMatch> Is there a way to leave DirectoryMatch in the main config file and prevent the request for authorization from the http site? Running Apache 2 on Ubuntu 10.04 server from the default package. I have AllowOverride set to none - I prefer to handle things in the config files instead of .htaccess.

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  • Is there any program (or code, any language) that will mute all of the microphones on my computer?

    - by Sean
    Is there any program (or code, any language) that will mute all of the microphones on my computer? If it is code, please make it as simple as possible, the only language I know is C# and I am still VERY new to it. I just want to setup some way to mute my microphones from a hotkey/shortcut, and if I can just find a program that can do, I will be set. As I said, I can also do a little bit if it is in C#, but the only code I have seen before for this, was miles long (atleast to me). My goal, is I just want a program that opens up, and toggles the mute on the microhpones (all of the system audio input) then closes. That is it, very simple. Thank you to anyone who trys to helps me! EDIT: Yes, I am using Windows. I am using Windows 7 32-bit. I already know that I can go into the volume mixer and do it that way, but I need to do this while running a full screen application, and it is a hassle to have to exit fullscreen, open the volume mixer, the click the mute icon, then go back into full screen and the the whole thing over again to unmute it. And I will be toggling back and forth quite often, so it just takes alot to do that so much.

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  • (Mac Intel) HP PS driver prints in B&W from Adobe Reader after installing Cannon PS driver

    - by John B
    I have a unique problem that leaves me at a loss as to where to start troubleshooting. We have three Macs we use for graphics, two of which are PowerPC and one which is Intel. They are set up to print to an HP 5500dn, but occasionally this printer gets tied up with a massive print job, so I installed the PS driver (iR-PSv1.81MacOSX) for the Cannon C3200 Printer/copier on each of the machines. Both of the PowerPC Macs installed without issue, but the Intel Mac exhibits strange behavior: I've confirmed that while the Cannon driver is installed (whether or not the Cannon is set up for printing in print settings), the HP 5500dn will print in color from Safari, but only prints in black and white from Adobe Reader. The Cannon printer itself has not exhibited any strange behavior As soon as the Cannon driver is uninstalled, the HP 5500dn prints in color from Adobe Reader again. We run a network of Windows PCs, and the 'Mac room' mostly takes care of itself, so we don't have any experienced Mac administrators onsite. The Cannon is capable of Appletalk, but the PS driver seemed easier to work with (and Appletalk is currently disable on the Cannon. I'm not against using the Appletalk compatible drivers, but I would rather use the PS driver if at all possible - I don't want to open up the proverbial can of worms. If someone has any clues or suggestions that would help troubleshoot this problem, I would be grateful. I've already done some googling, but due to the obscure nature of this problem, I haven't been very successful.

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  • Mysql connections hanging in login state

    - by Mark Rose
    Suddenly today, I had an issue with connections to mysql hanging when connecting by IP address (e.g. mysql -h 10.1.248.20), but I could still connection using localhost fine, regardless the user. mysql> show processlist; +----+----------------------+------------------+------+---------+------+-----------------------------------------------------------------------+------------------+ | Id | User | Host | db | Command | Time | State | Info | +----+----------------------+------------------+------+---------+------+-----------------------------------------------------------------------+------------------+ | 1 | system user | | NULL | Connect | 10 | Connecting to master | NULL | | 2 | system user | | NULL | Connect | 10 | Has read all relay log; waiting for the slave I/O thread to update it | NULL | | 37 | unauthenticated user | 10.1.248.3:36694 | NULL | Connect | NULL | login | NULL | | 38 | unauthenticated user | 10.1.248.3:36695 | NULL | Connect | NULL | login | NULL | | 39 | unauthenticated user | 10.1.248.3:36696 | NULL | Connect | NULL | login | NULL | | 40 | root | localhost | NULL | Query | 0 | NULL | show processlist | +----+----------------------+------------------+------+---------+------+-----------------------------------------------------------------------+------------------+ 6 rows in set (0.00 sec) Yes, I realize replication was broken in that output above; that was after I tried restart MySQL (it was an emergency). And as suddenly as things stopped working, they started working again. DNS was working fine at the time. Replication was still working. MySQL was responsive. Does anyone have any idea what would cause MySQL logins from remote IPs to hang suddenly?

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  • Dell Vostro Desktop error

    - by goldenmean
    Faced a strange situation at work today. We have people sitting at a table on opposite sides, with power cables underneath the table. This morning when the person sitting opposite to me banged his feet on ground, it disturbed the power cable to my PC and it turned-off. So when I turned it on, it says, "No boot device found" Press F1 to setup or F5 to perform test... There was no physical impact/crash/fall of the desktop cabinet, which could have crashed/damaged the hard disk physically. EDIT: The OS is Windows 7 So I tried to recognize it in the Bios setup, but even there it could not find the SATA disk that is connected to this machine. So then I opened the cabinet, removed the power supply and plugged it back again. Tried to reboot, same error, "Boot device not found" It is not recognizing the hard disk. Any ideas about what might be wrong? Hard-disk crash, OS Crash(But it doesn't even go to the point of loading the disk after the initial Bios execution, so doubt this...) Any pointers about how I should proceed to troubleshoot/solve this error are welcome.

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  • Why does my PC successfully boot only when unplugged for more than a few minutes?

    - by philg
    I have an HP Pavilion Elite desktop computer, model HPE-490t. I like it because it didn’t cost too much, boots itself from an SSD, came with 16 GB of RAM, and has 6 CPU cores for editing video and camera RAW images. It has one behavioral quirk that I cannot explain, however. The recent power interruptions here in the Northeast got the machine into a state where it could not be restarted. It would power up for a second or two, shut down, and then power up again, never being able to get to the point of showing anything on the monitor. I unplugged it for about 10 seconds and plugged it back in. Same behavior (fails to boot). I unplugged it and walked away for an hour, then plugged it back in and it worked perfectly! I think something similar happened after installing a second hard disk drive into this machine. So the question is why does the computer behave differently depending on how long it has been unplugged? Where is energy stored that affects the machine’s ability to boot? Capacitors in the power supply? Battery on the motherboard (there is one for the clock, but that wouldn’t be exhausted by being unplugged for an hour, I don’t think)?

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  • how to rewrite '%25' in url

    - by nn4l
    My website software replaces space characters with '+' characters in the URL, A proper link would look like 'http://www.schirmacher.de/display/INFO/How+to+reattach+a+disk+to+XenServer' for example. Some websites link to that article but somehow their embedded editor can't handle the encoding, so what I see in the httpd log files is actually GET /display/INFO/How%2525252bto%2525252breattach%2525252ba%2525252bdisk%2525252bto%2525252bXenServer which of course leads to a 404 error. It seems that the '+' character is encoded as '%2b' and then the '%' character is encoded as '%25' - several times. Since there are many such references to different pages from different websites, I would like to rewrite the url so that the visitors get the correct page. Here's my attempt which does not work: RewriteRule ^(.*)%25(.*)$ $1%$2 [R=301] What it is supposed to do is: take everything before the %25 string and everything after it, concat those strings with a '%' in between, then redirect. With the example input URL the rule should rewrite to /display/INFO/How%25252bto%2525252breattach%2525252ba%2525252bdisk%2525252bto%2525252bXenServer followed by a redirect, then it should rewrite to /display/INFO/How%252bto%2525252breattach%2525252ba%2525252bdisk%2525252bto%2525252bXenServer and again to /display/INFO/How%2bto%2525252breattach%2525252ba%2525252bdisk%2525252bto%2525252bXenServer and so on. Finally, after a lot of redirects I should have left /display/INFO/How%2bto%2breattach%2ba%2bdisk%2bto%2bXenServer which is a valid url equivalent to /display/INFO/How+to+reattach+a+disk+to+XenServer. My problem is that the expression does not match at all, so it does not even replace a single occurrence of %25. I understand that there is a limit in the number of redirects and I should really use the [N] flag however I don't even get the first step right.

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  • Remote Desktop fails after VPN connection

    - by Samet Sorgut
    The local computer (comp 1) is connected to a remote computer (comp 2) with Remote Desktop. On the remote computer (comp 2), I try to establish an VPN connection to a different remote computer (comp 3). Once I try to establish the VPN connection from the remote computer (comp 2) to the second remote computer (comp 3), Remote Desktop freezes on comp 1. It is not possible to connect to comp 2 again via Remote Desktop. What can be done to connect to this remote computer (comp 2) after it establishes a VPN connection? The only thing that comes to my mind is to install a second NIC and configure Remote Desktop to accept connection from this NIC while VPN is working from the other... What do you suggest? EDIT: I want to use the internet connection of the VPN, so all traffic should go over the VPN but still RDP working. My IP: 100.0.0.1 The IP where I'm connecting via RDP: 200.0.0.20 (Mask: 255.255.255.192, Gateway: 200.0.0.193) Where the 200.0.0.1 connects to VPN the IP of the VPN is: 65.254.61.250 Will routing like this help (Command is issued in 200.0.0.20, the RDP location): route ADD 65.254.61.250 MASK 255.255.255.192 200.0.0.193 Couldn't add gives the error: The route addition failed: The parameter is incorrect. I tried before connecting to VPN.

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  • Mongo daemon restarts after replica set issue

    - by Matt Beckman
    We had a recent election in our replica set (2 read nodes; 1 write node) that changed the primary node. Curious as to why this occurred, I started looking through the logs to find out what happened. It appears that mongoNode2 could not communicate with mongoNode3. When both nodes could not communicate, it appears that this caused the services on mongoNode2 and mongoNode3 to restart, eventually resulting in a new primary after the services had been started again. Thu Jun 23 08:27:28 [ReplSetHealthPollTask] DBClientCursor::init call() failed Thu Jun 23 08:27:28 [ReplSetHealthPollTask] replSet info mongoNode3:27017 is down (or \ slow to respond): DBClientBase::findOne: transport error: mongoNode3:27017 query: { \ replSetHeartbeat: "myReplSet", v: 3, pv: 1, checkEmpty: false, from: \ "mongoNode2:27017" } Thu Jun 23 08:27:29 got kill or ctrl c or hup signal 15 (Terminated), will \ terminate after current cmd ends Thu Jun 23 08:27:29 [interruptThread] now exiting Thu Jun 23 08:27:29 dbexit: Is there any reason that the mongo service would restart due to a DBClientCursor::init call() failure? Is this a known bug? It should be noted that mongoNode2 and mongoNode3 are VMs on the same VMware host. MongoNode1 is not on the same host, and it did not have any issues with the service. However, I did not have any other reports of issues with other VMs on the VMware host.

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  • Advice: USB Monitoring Programming

    - by Kashif
    I need an advice about USB programming in linux. i have to design a USB monitoring program that 'll keep checking usb ports of a linux cent os. as soon as a usb or external hard disk is connected, this program will shoot an email to some specific person about detail of usb (as size, mount on, time). when usb is disconnected, it will again shoot an email to some person with same kind of information. mean while this program will also write logs in syslog/messages with name of programing for easy tracking. Now I want ask that what is best way to develop this program. as I'm new to this field so i know nothing about it? either i should use perl, bash scripting or some other language? I have no idea what is right way to adopt coz this program will keep running all the time to keep a check on usb ports. I know few commands in like lsusb, fdisk (to check attached usb) and df -h (to get detail of usb) but dont know how i can achieve using these commands that i am thinking. also one more thing that in future i also need to modify this program for ubuntu and Citrix XenServer and it should be same everywhere.

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  • Reference entire excel 2007 sheet to another sheet

    - by Keikoku
    I have one sheet with 100 rows of data. I have a second sheet that will use the same data but with filters applied. In fact, I will have a dozen sheets, each with different filters. My goal is to have references from the every sheet to the first so that prior to filtering, they all contain exactly the same data. This way I only have to modify one sheet and all sheets will reflect the changes. The purpose is to create external links from word to excel to display specific rows, but there appears to be a limitation to linking where it displays absolutely everything that you see on the sheet itself (and each view must be different). I can manually reference the first cell and then drag the black box to easily expand it to the required number of rows, but that would require me to go into each sheet and drag the black box again whenever I add new entries to the master copy. Is there an easy way to do this? Note that the issue is the same as Easy way for users to update linked documents Excel 2007, except this time I am using a different approach. Solutions to both would be welcome.

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  • Hardware freeze during disk activity

    - by Thomi
    I built myself a linux-based NAS. It has several drives of various sizes and ages in an LVM configuration, with 800GB or so of data. The data is served using a simple samba server. This was working flawlessly, but after physically moving it, it has developed a strange fault: Whenever I do something on the server to cause disk activity, the entire machine freezes hard. This has the effect of killing any open network connections to the box, and generally making it useless. If I leave the machine for a few minutes it seems to come right again, but obviously this isn't really a solution. There are no error or warning messages in syslog, or the kernel logs. If I power the machine on, and leave it, it runs for several days without locking up. After that time I stopped testing. It doesn't freeze instantly - obviously it doesn't freeze while booting, and I can normally log in via SSH and start poking around in a few log files for a couple of minutes before it dies. My question is: What diagnostic tests can I run to determine the casuse?

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  • Windows XP / Outlook 2003 error messages

    - by AboutDev
    Can anyone help with this issue? I am trying to help someone and could use some expertise. Error Message #1: Microsoft Office Small Business Edition 2003 With CD icon "The feature you are trying to use is on a CD-ROM or other removable disk that is not available. Insert the 'Microsoft Office Small Business Edition 2003' disk and click OK. Use source: Microsoft Office Small Business Edition 2003" 1st got this message after CD was inserted to recover partial file STDP11N. Recovered STDP11N, however, still receiving pop up window with error message each time outlook opens. Had accidentally cleaned up old programs and suddenly this was missing. Reinstalled Microsoft Office Small Business Edition 2003 using install CD. Outlook worked buit keep getting error message pop up each time I open Outlook. Hit ok. Error Message #2: The path 'Microsoft Office Small Business Edition 2003' cannot be found. Verify that you have access to this location and try again, or try to find the installation package 'STDP11N.MSI' in a folder from which you can install the product Microsoft Office Small Business Edition 2003." Hit ok. Back to error message #1 Hit close window Error message #3: Error 1706. Setup cannot find the required files. Check your connection to the network, or CD-ROM drive. For other potential solutions to this problem, see C:\Program Files\Microsoft Office\ OFFICE11\1033\SETUP.CHM Error message #4 I'd created a file under D: drive on an external drive. "The path specified for the file D:...etc.. .pst is not valid. Hit ok. Brings up window to look in My Documents.

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  • How to increase the speed between two external hard drives on my laptop?

    - by Roman
    Hello, I own Sony Vaio Z laptop with two external USB ports. It's quite new and has USB 2.0 support. I'm using Vista x64 on it. I also have two external usb hard drives, Iomega 500GB and WD for 1TB. Every hard drive has USB 2.0 support. I connect two devices to my laptop and trying to copy date from one hard drive to another. But it takes a lot of time! The speed is about 15 Megabytes per second. I have to wait toooooo long to copy all the information from one hard drive to another. When I try to copy information from my internal (SSD) hard drive, it works fine for both external drives. The speed is very high and it shows me something about 100 Megabytes per second. It makes me feel that USB 2.0 is OK on both drives. But when I'm trying to copy from one external drive to another external, I still get very low speed. I checked out Device Manager and here is the settings I have: (sorry, can't upload image because of my rating, check this url: http://picbite.com/image/122073daljo/ ) I think it's because two of my external drives use the same USB 2.0 controller. Is there any way to make it work faster? Is it possible to move one of my USB ports to other USB 2.0 controller? Or is there any software which can help me to automate copying all the files thru my internal drive? I have only about 3 gigabytes free space on internal drive and it's quite difficult to move manually every file from one hard drive to internal and then again to another internal.

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