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  • How does Subnetting Work?

    - by Kyle Brandt
    How does Subnetting Work, and How do you do it by hand or in your head? Can someone explain both conceptually and with several examples? Server Fault gets lots of subnetting homework questions, so we could use an answer to point them to on Server Fault itself. What is classless routing and why is class-based routing obsolete? If I have a network, how do I figure out how to split it up? If I am given a netmask, how do I know what the network Range is for it? Sometimes there is a slash followed by a number, what is that number? Sometimes there is a subnet mask, but also a wildcard mask, they seem like the same thing but they are different? Someone mentioned something about knowing binary for this? Not looking for links to other sites (unless maybe you have one post with a bunch of good ones). I already know how to subnet, I just thought it would be nice if Server Fault had a generic subnetting answer.

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  • wget mirroring, subdomains and directories and cookies

    - by Jimmu
    Hi all, I have an account on a web page that is now "full" (ie I have used up all my allocated space) and I would like to make a mirror of that site. wget seems like the thing to use. The problem is that I would only like to mirror the sites the lie within this directory http://user.domain.com/room/2324343/transcript/ (and sub-directories). Whilst saving the correct stylesheets, javascripts and css etc which exist in different directories. There as also uploaded files that are linked to within the pages in the transcript directory (on different directories) that I would like to download/mirror (theses are in a variatey of formats .exe, .py, .png, .app (and many more)). There are also images that are on different severs that are on these pages. Also I would like it if the links (which are sometimes relative , sometimes absoulute (but to internal things), sometimes external ) worked correctly so that if they link to things that have been downloaded(mirrored) they work fine (without internet connection), but if they link to things that are external or havent been mirrored they link to the external site. Basically so they work as expected. Another problem is that you have to log in to acess the site. Can wget be used to acomplish this or is there a better way? either way how do I achive this? (I have asked this question at stackoverflow.com/questions/2190115/wget-mirroring-subdomains-and-directories-and-cookies but it was recommended that I try asking it here)

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  • VMware databursts to vCenter

    - by Erwin Blonk
    [edit Nov.16th 2009: Thank you for the responses. I'm no longer on this project so the problem is out of my hands. Be sure I will return with other problems :-) ] I have a strange occurence of regular databursts over my WAN links from 2 sites to a site with vCenter. What happens is that a vCenter server is managing local ESX 3.5 servers and 2 from 2 sites across a WAN link. Each server sends an approximately 3MB worth of TLS data (less than 10% of the time it varies to higher or lower) every 15 minutes (with a margin of 2 minutes). So far, I've not been able to single out a process that causes it. I looked through all applications on each site. So far, it seems to originate from one server on each site. Although it may be coincidence and therefore not relevant, I found that one server, with very few exceptions, does a burst at 00:00 on the hour. The other 3 during the hour are a bit off the 15 minute mark but back at the top of the hour, you can sync your watch on it. The other server follows 5 minutes after that with no such precision. But, as said, it never differs more than 2 minutes. Servers are ESX 3.5, vCenter is 2.5.

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  • Split horizon, route filtering, and having RIPv2 announce a non-attached route to host

    - by Paul
    Routers A, B & C live at 10.1.1.1, 10.1.1.2 and 10.1.1.3 on a /24 metro Ethernet subnet. Each router also has its own private subnet on another interface. Router B's private subnet links thru a firewall to a 10.20.20.0 network at another organization. Router B redistributes to A and C several static routes for hosts on 10.20.20.0. However, a new host 10.20.20.5/32 must be reached via a different path that goes through router C. I know that C can advertise this host-based route with no problem, but I'd like to keep all my 10.20.20.x static routes in one place. So, how can B tell A via RIPv2 to send packets for 10.20.20.5/32 to C? So far it looks like I need no ip split-horizon on router B's 10.1.1.2 interface, perhaps because B has already learned from C other routes with a next hop of 10.1.1.3. But how does RIPv2 split horizon with no auto-summary and network 10.0.0.0 really work? If B learns a route to ANY 10.x.x.x network or host from A or C, is that enough for split horizon to keep it from redistributing ip route 10.20.20.5 255.255.255.255 10.1.1.3? And if I want to suspend split horizon only for this one new host, how do I filter out the mess of regurgitated routes that B advertises when I try no ip split-horizon? Thanks much.

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  • Ubuntu 10.04: Unable to Start RabbitMQ Server Post-Installation

    - by Garland W. Binns
    After installing RabbitMQ on Ubuntu 10.04 I receive a failure message that the service was unable to start. Any insight into the issue would be greatly appreciated! Below are contents of startup_log and startup_err. Startup_log: {error_logger,{{2012,7,7},{15,50,31}},"Protocol: ~p: register error: ~p~n",["inet_tcp",{{badmatch,{error,etimedout}},[{inet_tcp_dist,listen,1},{net_kernel,start_protos,4},{net_kernel,start_protos,3},{net_kernel,init_node,2},{net_kernel,init,1},{gen_server,init_it,6},{proc_lib,init_p_do_apply,3}]}]} {error_logger,{{2012,7,7},{15,50,31}},crash_report,[[{initial_call,{net_kernel,init,['Argument__1']}},{pid,<0.20.0>},{registered_name,[]},{error_info,{exit,{error,badarg},[{gen_server,init_it,6},{proc_lib,init_p_do_apply,3}]}},{ancestors,[net_sup,kernel_sup,<0.9.0>]},{messages,[]},{links,[#Port<0.100>,<0.17.0>]},{dictionary,[{longnames,false}]},{trap_exit,true},{status,running},{heap_size,987},{stack_size,24},{reductions,512}],[]]} {error_logger,{{2012,7,7},{15,50,31}},supervisor_report,[{supervisor,{local,net_sup}},{errorContext,start_error},{reason,{'EXIT',nodistribution}},{offender,[{pid,undefined},{name,net_kernel},{mfa,{net_kernel,start_link,[[rabbitmqprelaunch877,shortnames]]}},{restart_type,permanent},{shutdown,2000},{child_type,worker}]}]} {error_logger,{{2012,7,7},{15,50,31}},supervisor_report,[{supervisor,{local,kernel_sup}},{errorContext,start_error},{reason,shutdown},{offender,[{pid,undefined},{name,net_sup},{mfa,{erl_distribution,start_link,[]}},{restart_type,permanent},{shutdown,infinity},{child_type,supervisor}]}]} {error_logger,{{2012,7,7},{15,50,31}},std_info,[{application,kernel},{exited,{shutdown,{kernel,start,[normal,[]]}}},{type,permanent}]} {"Kernel pid terminated",application_controller,"{application_start_failure,kernel,{shutdown,{kernel,start,[normal,[]]}}}"} Startup_err: Crash dump was written to: erl_crash.dump Kernel pid terminated (application_controller) ({application_start_failure,kernel,{shutdown,{kernel,start,[normal,[]]}}})

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  • Building new computer, turns on, but no post

    - by addybojangles
    Pardon my ignorance here, finally decided to put together a computer and egads. I purchased a new motherboard, power supply, processor, video card and memory. ASUS M4A79XTD EVO AM3 AMD 790X ATX AMD Motherboard OCZ Fatal1ty OCZ550FTY 550W ATX12V v2.2 / EPS12V SLI Ready 80 PLUS Certified Modular Active PFC Power Supply AMD Phenom II X4 965 Black Edition Deneb 3.4GHz 4 x 512KB L2 Cache 6MB L3 Cache Socket AM3 125W Quad-Core Processor XFX HD-577A-ZNFC Radeon HD 5770 (Juniper XT) 1GB 128-bit GDDR5 PCI Express 2.0 x16 HDCP Ready CrossFireX Support Video Card G.SKILL 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Dual Channel Kit Desktop Memory Model F3-12800CL9D-4GBNQ (originally had links for you guys, but I lack the rep, sorry!!) And I've got it all in the tower. I put in power supply, installed processor on motherboard, installed heatsink, put in ram, and I am using an older IDE hard disk. When I start the computer, the monitor tells me "check signal cable." As far as I can tell, the heatsink on the processor is spinning, the power supply is on (obviously), and the green LED on the motherboard is on. I originally only had the bigger output plugged in to the motherboard (what I saw in a YouTube vid as well as the mobo instructions), but after doing some research, it said plug in the other ATX power supply. Which I did. And trying to power the computer results in nothing. No beeps on startup, no post, anyone have any ideas? Your ideas and help is greatly appreciated.

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  • Running Mathematica-5 remotely

    - by oxinabox.ucc.asn.au
    I have Mathematica 5 - a powerful CAS. I have a cheap netbook (running Windows XP), wich not only is too slow to run mathmatica on, I doubt it has the harddrive space. I do however have remote access to a number of very powerful computers, (most of wich run variose Linuxes, but one of which is Windows Server 2008, though I'ld rather not use this one*). Mostly over SSH but other protocols can be arraged for some, I'm sure. So I'ld like to install Mathematica onto one of these machine and then run it remotely. Either from the command line via Putty or via some other method. I glanced through the mathematical documentation and read something about using some MathLink program, which links the front end installed on my computer to a remote kernel. Anyone have any experience with this? I'm not sure if this belongs here or in SuperUser. At the moment, it's being tinkered with, and when the tinkering stops it'll likely be used to run multiple thin terms. As compared to the Linux machines: I have access to a dual 2.4 Xeon with 3GB RAM, which the rest of the world seems to have completely forgotten about (runs freeBSD!).

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  • How much network latency is "typical" for east - west coast USA?

    - by Jeff Atwood
    At the moment we're trying to decide whether to move our datacenter from the west coast (Corvallis, OR) to the east coast (NY, NY). However, I am seeing some disturbing latency numbers from my location (Berkeley, CA) to the NYC host. Here's a sample result, retrieving a small .png logo file in Google Chrome and using the dev tools to see how long the request takes: Berkeley to NYC server: 215 ms latency, 46ms transfer time, 261ms total Berkeley to Corvallis server: 114ms latency, 41ms transfer time, 155ms total some URLs if you want to try yourself: http://careers.stackoverflow.com/content/cso/img/logo.png (NY, NY) http://serverfault.com/cache/logo.png (Corvallis, OR) It makes sense that Corvallis, OR is geographically closer to Berkeley, CA so I expect the connection to be a bit faster.. but I'm seeing an increase in latency of +100ms when I perform the same test to the NYC server. That seems .. excessive to me. Particularly since the time spent transferring the actual data only went up 10%, yet the latency went up ten times as much! That feels... wrong... to me. I found a few links here that were helpful (through Google no less!) ... http://serverfault.com/questions/63531/does-routing-distance-affect-performance-significantly http://serverfault.com/questions/61719/how-does-geography-affect-network-latency http://serverfault.com/questions/6210/latency-in-internet-connections-from-europe-to-usa ... but nothing authoritative. So, is this normal? It doesn't feel normal. What is the "typical" latency I should expect when moving network packets from the east coast <--> west coast of the USA?

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  • administrator user unable to login, suspicious user accounts "sky$", "admin$"

    - by mks
    I have a Windows 2008 R2 Standard (64 bit) running in a virtual machine. Suddenly from yesterday onwards I am not able to login as administrator. Nobody changed the password. Both in the console as well as using remote desktop I am unable to login. Whenever I login as Administrator I am getting this error: "The user name or password is incorrect" Nothing has changed in the machine and I have logged in the past successfully both through console and via remote desktop several time on the same machine. One strange behaviour I noticed is, I am seeing some additional user accounts if I try to login as other user. The suspicious user account are: sky$ admin$ SUPPORT_388945a0 Is it created by some malware/virus? Or is it some windows hidden account? Microsoft site says that SUPPORT_388945a0 is: The Support_388945a0 account enables Help and Support Service interoperability with signed scripts. This account is primarily used to control access to signed scripts that are accessible from within Help and Support Services. Administrators can use this account to delegate the ability for an ordinary user, who does not have administrative access over a computer, to run signed scripts from links embedded within Help and Support Services. These scripts can be programmed to use the Support_388945a0 account credentials instead of the user’s credentials to perform specific administrative operations on the local computer that otherwise would not be supported by the ordinary user’s account. When the delegated user clicks on a link in Help and Support Services, the script executes under the security context of the Support_388945a0 account. This account has limited access to the computer and is disabled by default. However I am not sure from where this "admin$" and "sky$" came. Anyone has similar experience?

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  • Windows Server 2008 Create Symbolic Link, updated Security Policy still gives privilege error

    - by Matt
    Windows Server 2008, RC2. I am trying to create a symbolic/soft link using the mklink command: mklink /D LinkName TargetDir e.g. c:\temp\>mklink /D foo bar This works fine if I run the command line as Administrator. However, I need it to work for regular users as well, because ultimately I need another program (executing as a user) to be able to do this. So, I updated the Local Security Policy via secpol.msc. Under "Local Policies" "User Rights Management" "Create symbolic links", I added "Users" to the security setting. I rebooted the machine. It still didn't work. So I added "Everyone" to the policy. Rebooted. And STILL it didn't work. What on earth am I doing wrong here? I think my user is even an Administrator on this box, and running plain command line even with this updated policy in place still gives me: You do not have sufficient privilege to perform this operation.

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  • Setup of HP ProCurve 2810-24G for iSCSI?

    - by 3molo
    Hi, I have a pair of ProCurve 2810-24G that I will use with a Dell Equallogic SAN and Vmware ESXi. Since ESXi does MPIO, I am a little uncertain on the configuration for links between the switches. Is a trunk the right way to go between the switches? I know that the ports for the SAN and the ESXi hosts should be untagged, so does that mean that I want tagged VLAN on the trunk ports? This is more or less the configuration: trunk 1-4 Trk1 Trunk snmp-server community "public" Unrestricted vlan 1 name "DEFAULT_VLAN" untagged 24,Trk1 ip address 10.180.3.1 255.255.255.0 no untagged 5-23 exit vlan 801 name "Storage" untagged 5-23 tagged Trk1 jumbo exit no fault-finder broadcast-storm stack commander "sanstack" spanning-tree spanning-tree Trk1 priority 4 spanning-tree force-version RSTP-operation The Equallogic PS4000 SAN has two controllers, with two network interfaces each. Dell recommends each controller to be connected to each of the switches. From vmware documentation, it seems creating one vmkernel per pNIC is recommended. With MPIO, this could allow for more than 1 Gbps throughput.

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  • Failed to open the Parallels networking module

    - by user49204
    I'm running Parallels Desktop 7 on OSX Lion and encounter the issue in the subject on every time I'm trying to launch Parallels VM. The error message contains a hint to restore to network configuration default which does not help. As been advised by some forums to ran the following script: sudo kextutil "/Library/Parallels/Parallels Service.app/Contents/Kexts/10.6/prl_hypervisor.kext" sudo kextutil "/Library/Parallels/Parallels Service.app/Contents/Kexts/10.6/prl_hid_hook.kext" sudo kextutil "/Library/Parallels/Parallels Service.app/Contents/Kexts/10.6/prl_usb_connect.kext" sudo kextutil "/Library/Parallels/Parallels Service.app/Contents/Kexts/10.6/prl_netbridge.kext" sudo kextutil "/Library/Parallels/Parallels Service.app/Contents/Kexts/10.6/prl_vnic.kext" The output of: sudo kextutil "/Library/Parallels/Parallels Service.app/Contents/Kexts/10.6/prl_netbridge.kext" is: Diagnostics for /Library/Parallels/Parallels Service.app/Contents/Kexts/10.6/prl_netbridge.kext: Warnings: The booter does not recognize symbolic links; confirm these files/directories aren't needed for startup: /Library/Parallels/Parallels Service.app/Contents/Kexts/10.6/prl_netbridge.kext/Contents/CodeDirectory /Library/Parallels/Parallels Service.app/Contents/Kexts/10.6/prl_netbridge.kext/Contents/CodeRequirements /Library/Parallels/Parallels Service.app/Contents/Kexts/10.6/prl_netbridge.kext/Contents/CodeResources /Library/Parallels/Parallels Service.app/Contents/Kexts/10.6/prl_netbridge.kext/Contents/CodeSignature Dependency Resolution Failures: No kexts found for these libraries: com.parallels.kext.prl_hypervisor I've noticed that prl_netbridge is not being loaded (when I'm trying to unload it, I'm notified it is not loaded). Am I doing something wrong? What can be the reason for such behaviour?

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  • Windows Server 2008 R2 SP1 Drivers Missing Would Not Install?

    - by bleepzter
    I am building my dev machine with WS2008R2SP1. I consider Windows Server as the best development environment for C# since I tend to focus on server-centric (integration) applications. The desktop flavor of Windows (7) doesn't play nicely with things like Commerce Server or BizTalk... so I to like stick to the environment I develop for. Previously I used to develop inside of VM's but I've found that it is super inefficient and tends to take a toll on the laptops. (I've gone through two of them in 6 months). Problem is that I multiple devices that do not want to be recognized by Windows: My machine is Dell Precision M4500: Intel Core i7-Q740, 1TB HDD, 8GB RAM, Dell re-branded Broadcom DW1501 802x11n Half-Mini Card, Dell re-branded Broadcom DW375 Bluetooh Module, Intel 82577LM Gigabit Network connection NVidia Quadro FX1800 Graphics The devices in question are the Dell rebranded broadcom network and bluetooth adapters: Broadcom USH: USB\VID_0A5C&PID_5800&REV_0101&MI_00 USB\VID_0A5C&PID_5800&MI_00 DW375 Bluetooth Module USB\VID_413C&PID_8187&REV_0517 USB\VID_413C&PID_8187 When I ran the broadcom installers I get "Operating System not supported" which I think is a big oversight on Broadcom's part. Why check for system version string? UGHGHGH Moreover if I try to manually force the driver in windows... I get an error: Driver Management concluded the process to install driver FileRepository\btwampsecfl.inf_amd64_neutral_d8fc2b85d035ed47\btwampsecfl.inf for Device Instance ID USB\VID_0A5C&PID_5800&MI_00\7&66DE6C9&0&0000 with the following status: 0xe0000217. '- or - Driver Management concluded the process to install driver FileRepository\btwampfl.inf_amd64_neutral_d4c4acf036c61299\btwampfl.inf for Device Instance ID USB\VID_413C&PID_8187\90004EEEF5A6 with the following status: 0xe0000217. I googled the 0xe0000217 error code and it says Bad service install section in the driver inf file... Any ideas on how to fix this? I also tried the post by BetaIQ on MSDN Forum, unfortunately the links to the driver package included in the post were dead :( PS. On a side note I also do mobile development for Android, iOS, and Windows Phone, and BB. Having the bluetooth is quite useful with mobile devices.

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  • Resolving "JBoss Web Console is Accessible to Unauthenticated Remote Users" vulnerability

    - by IAmJeff
    Our security team has determined there is a vulnerability in one of our systems. We are using version JBoss 5.1.0GA on RHEL 5.10. Vulnerability description: JBoss Web Console is Accessible to Unauthenticated Remote Users Yes, this looks familiar. Refer to Question 501417. I do not find the answer there complete. Can someone (or multiple someones) answer Does a newer version of JBoss fix this vulnerability? Are there links describing, in more detail, manual modification of JBoss configuration files to resolve the issue? Are there others options to remediate this vulnerability? Why don't I find the other answer complete? I'm not at all familiar with JBoss, so this answer seems a bit too simple. The web-console.war contains commented-out templates for basic security in its WEB-INF/web.xml as well as commented-out setup for a security domain in WEB-INF/jboss-web.xml. Just uncomment those basic security blocks and restart? Is there anything else I need to include? This seems generic. Do I need to include anything about my environment, such as absolute paths, etc.? Am I making this too complicated?

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  • Create new folder for new sender name and move message into new folder

    - by Dave Jarvis
    Background I'd like to have Outlook 2010 automatically move e-mails into folders designated by the person's name. For example: Click Rules Click Manage Rules & Alerts Click New Rule Select "Move messages from someone to a folder" Click Next The following dialog is shown: Problem The next part usually looks as follows: Click people or public group Select the desired person Click specified Select the desired folder Question How would you automate those problematic manual tasks? Here's the logic for the new rule I'd like to create: Receive a new message. Extract the name of the sender. If it does not exist, create a new folder under Inbox Move the new message into the folder assigned to that person's name I think this will require a VBA macro. Related Links http://www.experts-exchange.com/Software/Office_Productivity/Groupware/Outlook/A_420-Extending-Outlook-Rules-via-Scripting.html http://msdn.microsoft.com/en-us/library/office/ee814735.aspx http://msdn.microsoft.com/en-us/library/office/ee814736.aspx http://stackoverflow.com/questions/11263483/how-do-i-trigger-a-macro-to-run-after-a-new-mail-is-received-in-outlook http://en.kioskea.net/faq/6174-outlook-a-macro-to-create-folders http://blogs.iis.net/robert_mcmurray/archive/2010/02/25/outlook-macros-part-1-moving-emails-into-personal-folders.aspx Update #1 The code might resemble something like: Public WithEvents myOlApp As Outlook.Application Sub Initialize_handler() Set myOlApp = CreateObject("Outlook.Application") End Sub Private Sub myOlApp_NewMail() Dim myInbox As Outlook.MAPIFolder Dim myItem As Outlook.MailItem Set myInbox = myOlApp.GetNamespace("MAPI").GetDefaultFolder(olFolderInbox) Set mySenderName = myItem.SenderName On Error GoTo ErrorHandler Set myDestinationFolder = myInbox.Folders.Add(mySenderName, olFolderInbox) Set myItems = myInbox.Items Set myItem = myItems.Find("[SenderName] = " & mySenderName) myItem.Move myDestinationFolder ErrorHandler: Resume Next End Sub Update #2 Split the code as follows: Sent a test message and nothing happened. The instructions for actually triggering a message when a new message arrives are a little light on details (for example, no mention is made regarding ThisOutlookSession and how to use it). Thank you.

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  • Reviving a dead laptop battery

    - by Alex Ciminian
    Is there any way to revive a dead laptop battery? I have a three year old Dell Latitude laptop that I've been using pretty intensively. After a year or so, the battery dropped dead - if I plug the laptop out it goes into hibernation in a matter of seconds. Probably this was because I kept working on it plugged in all the time, but back then I didn't realize what effect it could have (this was my first laptop). Currently, I'm searching for a new laptop and I was thinking if there was something I could do to get the battery back working. I've found several links (sorry, I'm a new user so I can't post them) about freezing Li-ion batteries, but the opinions seem to mixed - some say that it worked for them, some not. If you've tried the freezing technique please let me know if it works. Or if you know another way to make a dead battery work again, please share here. I've already seen this thread, but I'm not very handy with soldering. If it's the only alternative I'll try it, but there's a big chance that I'll screw it up. Thanks!

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  • Can't boot flash drive on GIGABYTE motherboard

    - by Deltik
    Situation When I try to boot from my flash drive, my GIGABYTE 970A-UD3 motherboard returns this: Loading Operating System ... Boot error All other motherboards I've tried support booting from that flash drive (and a backup flash drive). The operating systems I tried on both flash drives were created with usb-creator-gtk (Ubuntu USB Startup Disk Creator). I know that the motherboard understands that there is an operating system on the flash drives because when I erase them, it complains in an ALL CAPS RAGE that there isn't an operating system, which is correct. How can I boot a flash drive that's bootable from other motherboards on this motherboard? Qualification This question is not a duplicate of this one because directly writing to the flash drive as an ISO 9660 (dd if=operating_system.iso of=/dev/sdb) still does not have the motherboard recognize the operating system. This question should be a duplicate of this one because I provide more information not provided by that poster. This forum thread has broken links and does not have a solution to my problem. Nobody knows what's going on in this forum thread.

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  • How can i link a oracle user to a business objects user

    - by Robert Speckmann
    I have a problem with linking the oracle user to a business objects user. I will try to explain it as detailed as possible; I have a Oracle database (10g) where a couple of users are defined. These users can query on information with application X. Those records will then be written into the oracle database. The records that is written into the database has a ID that links to the person that has run the query. I also have a active directory in wich a couple of users are made; testuser1, testuser2. When those users log on, and want to load a report in Business Objects XI i want them to see the information that was created when the report was activated by that same user that had runned the query before with application X. The name of the person in the active directory and the name in the oracle database are not the same but i dont think that would be a problem in this stage. So the steps i took: First, i run a report in application X (with a account prodpim_rs) wich fills my Oracle database with a record. The second step is logging on as testuser1 (from the AD) and then login on Business Objects XI with the account. Now i want to load a report with the information in my Oracle database. So the prodpim_rs user and the testuser must have a link between them. I am wondering how to forfill this. Can i link the account, wich is made in a Oracle database, with the user of BO wich is linked to my AD? Thank you in advance for your reply Robert

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  • Distributing a custom command line tool to enterprise servers

    - by Jeremy Baker
    I've been tasked with building a command line tool that we will be providing to our enterprise customers so that they can use the API to upload data to our platform. The API works with standard cURL requests, so I can do most of the basic functionality with simple bash scripting, although I would like to provide something that is solid and really makes it easy for them to use and I don't know what I don't know. It's been a good 8 years since I've really done any serious sysadmin work. Most of the good tools I use these days are written in Ruby or Python and have a standard distribution process (Gems, for example). However, I know rhel and other platforms have their own package managers. Finally, the question: In today's day and age, what language / distribution method should I consider in order to cover the widest range of platforms without having to build completely different versions for each platform? I'd also love any general feedback you have about building similar projects, or links to projects that you think do a good job of this now and have open source code that I could read. Thanks in advance!

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  • Blank desktop when logging into a Virtualized Windows 2008 Terminal Server?

    - by Rachel
    We have a Virtualized Terminal Server running Windows Server 2008. When the admin user logs in, everything is fine. When anyone else logs in, their desktop and start menu is blank (they have the taskbar, start button, and quick launch links though). If I go into Windows Explorer, I can see icons in their desktop folder (although the icon image is missing and it is just displaying the generic icon), but can't run any of them. If I login with a user that is part of the Administrator group in Active directory, I get the same behavior except I can launch the programs found in the Desktop Folder of Windows Explorer. I cannot drag these items out onto the desktop though - The cursor doesn't allow me to drop them. From Task Manager I can see that explorer.exe and dwm.exe are both running. The Authenticated Users and Interactive groups are both under the Users group, along with our network's Domain Users group. Does anyone know why this is happening and how I can fix it? Also, not sure if it's related but about 1 in every 3 logins just hangs at a completely blank blue screen (no start button, taskbar, or quick launch buttons) and needs to be disconnected / reset by an admin. Edit I just noticed that the desktop itself doesn't even respond to click events. It's almost like the entire desktop is missing. At first I thought it didn't respond to right-click events because of an AD policy, but then I noticed if you open the Start Menu and click the desktop, the start menu doesn't shut like it should

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  • Failed to bring up eth1 in a dual ips solution in ubuntu

    - by lxyu
    I'm using ubuntu 12.04. I tried to assign two ips to two ethernet cards in my server. The content of /etc/network/interfaces is like this: auto lo iface lo inet loopback auto eth0 iface eth0 inet static address 114.80.156.a netmask 255.255.255.224 gateway 114.80.156.b auto eth1 iface eth1 inet static address 114.80.156.c netmask 255.255.255.240 gateway 114.80.156.d a b c d have different values, which means the two ips are in different vlans. But I can only bring up eth0 with this command: $ /etc/init.d/networking restart RTNETLINK answers: File exists Failed to bring up eth1. ...done. I have checked the question here which shows the same problem like the one I encountered: Can only bring up one of two interfaces But it seems it's not really solved. And in my situation, I need the 2 ips to use 2 different gateways. So how to fix this problem? Edit1, changed the example config ip from 192.168.0.0/16 subnet to another 'real' subnet. Edit2, the purpose of doing this is fairly simple. Because the ip range I previous in don't have more room for new servers, and I have to move to another ip range. So I want to make the public servers bind to 2 ips for the transition period. I only have really limited knowledge about routing and subnet. @BillThor @rackandboneman, would you please give me some keywords or links on how to setup route for 2 ips? and @Mike Pennington, how do you know I speak chinese?

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  • laptop motherboard "shorts" when connected to adapter

    - by Bash
    Disclaimer: I'm sort of a noob, and this is a long post. Thank you all in advance! summary: completely dead laptop with no signs of life whatsoever (suddenly, for no apparent reason) Here's the deal: Lenovo Y470 (only a few months old with no water or shock damage). It stopped working suddenly (no lights, no sound, even when connecting adapter with or without battery). I tried a different adapter (same electrical rating), but no luck. I disassembled the thing completely, and tried plugging in the adapter and looking for signs of life with all different combinations of components installed (tried all combinations of RAM, CPU, USB power cords, screen, etc plugged in). no luck. Then, I noticed (as I was plugging in the adapter to try for the millionth time) that there was a "spark" for an instant when I first connect the adapter to the power jack. The adapter's LED would then flash (indicating it isn't working or charging). So, I thought the power jack has a short of some sort (due to bad soldering or something). Scanned virtually every single component on the motherboard, and tested the power jack connections with a multimeter. No shorts or damage to anything on the entire motherboard. Now I'm thinking I need to replace the motherboard. But, my actual question: What does this "shorting" when connecting the adapter signify? (btw, the voltage across the power connections and current through it drop to virtually zero when the adapter is connected and "sparks", and they stay that way). The bewildering thing is that there are no damaged components, and the voltage across adapter terminals returns to normal after I disconnect it (so it's not damaged). Please take a look at the pictures (of the motherboard's power connection and nearby components) and see if I'm missing something completely obvious... Links to pictures and laptop and motherboard model: pictures on DropBox Motherboard model: LA-6881P Laptop model: Lenovo IdeaPad Y470

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  • RSA keys - virtual hosts

    - by Bosworth99
    Pardon my noobness, but I just got started with VPS (linux) hosting; setting up passwordless ssh for multiple users has proved to be kind of a pain. Currently I'm the single user of this ubuntu 10.04 LTS VPS (linode.com). I was able to establish a single rsa passkey under my home/user/.ssh/authorized_keys location. Fine. PuTTy works as expected, and Filezilla (sftp) links up as required. I've been working on a single site that this user owns, and thats not been a problem. Now, I want to set up some other sites, and I've chosen Webmin with the VirtualMin plugin to make this work. I made another user (or, rather, virtualmin did), but I've been unable to get FileZilla to link up to this new user. Could anyone with experience here explain what the setup is supposed to look like? IE - can I use a single rsa key pair for all accounts (if, for example, I give ownership of files to the original user?). Or is it standard practice to create a separate key pair for each user, and establish a separate putty/filezilla login for each? I've spent enough time dinking around with this to be frustrated. "Sever rejected the provided key" error sucks after the fifth hour. I'm about to set up an ftp server and call it a day. Any thoughts would be most welcome -

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  • django, mod_wsgi, MySQL High CPU - Problems

    - by Red Rover
    Good Evening, and thank you for reading this post. I am having a problem with Django after migrating the dB from SQLlite to MySQL. Initially, for the first 48hours, all ran well. But now we are experiencing high cpu about every 30 minutes. This is a production ESX4i VM host, with 2 x 2.8 ghz CPUs and 12 GB ram. I have allocated 4 cpu's to this VM and 4 GB memory. Any insight into this configuration and help with the spikes in CPU would be appreciated. IT is configured to use the prefork MPM. Outlined are the config's for the different services: MySQL Server version: 5.1.61 Source distribution Django 1.3 mod_wsgi Apache/2.2.15 httpd.conf Timeout 120 KeepAlive Off MaxKeepAliveRequests 400 KeepAliveTimeout 3 prefork MPM StartServers 8 MinSpareServers 8 MaxSpareServers 16 ServerLimit 40 MaxClients 40 MaxRequestsPerChild 0 worker MPM StartServers 16 MaxClients 1024 MinSpareThreads 64 MaxSpareThreads 256 ThreadsPerChild 64 MaxRequestsPerChild 10240 MySQL my.conf [mysqld] datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock user=mysql symbolic-links=0 [mysqld_safe] log-error=/var/log/mysqld.log pid-file=/var/run/mysqld/mysqld.pid my.cnf wsgi.conf LoadModule wsgi_module modules/mod_wsgi.so /etc/httpd/conf.d/wsgi.conf WSGISocketPrefix /var/run/wsgi WSGIPythonEggs /var/tmp WSGIDaemonProcess SITE maximum-requests=10000 WSGIProcessGroup SITE

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  • AMD FX8350 CPU - CoolerMaster Silencio 650 Case - New Water Cooling System

    - by fat_mike
    Lately after a use of 6 months of my AMD FX8350 CPU I'm experiencing high temperatures and loud noise coming from the CPU fan(I set that in order to keep it cooler). I decided to replace the stock fan with a water cooling system in order to keep my CPU quite and cool and add one or two more case fans too. Here is my case's airflow diagram: http://www.coolermaster.com/microsite/silencio_650/Airflow.html My configuration now is: 2x120mm intake front(stock with case) 1x120mm exhaust rear(stock with case) 1 CPU stock I'm planning to buy Corsair Hydro Series H100i(www.corsair.com/en-us/hydro-series-h100i-extreme-performance-liquid-cpu-cooler) and place the radiator in the front of my case(intake) and add an 120mm bottom intake and/or an 140mm top exhaust fan. My CPU lies near the top of the MO. Is it a good practice to have a water-cooling system that takes air in? As you can see here the front of the case is made of aluminum. Can the fresh air go in? Does it even fit? If not, is it wiser to get Corsair Hydro Series H80i (www.corsair.com/en-us/hydro-series-h80i-high-performance-liquid-cpu-cooler) and place the radiator on top of my case(exhaust) and keep the front 2x120mm stock and add one more as intake on bottom. If you have any other idea let me know. Thank you. EDIT: The CPU fan running ~3000rpm and temp is around 40~43C on idle and save energy. When temp is going over 55C when running multiple programs and servers on localhost(tomcat, wamp) rpm is around 5500 and loud! I'm running Win8.1 CPU not overclocked PS: Due to my reputation i couldn't post the links that was necessary. I will edit ASAP.

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