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• Active Directory remote versus local computer logon

  - by Jake

  Hi, Hope some one can help a network/server noob understand how domains work in AD. I am in an organisation with 2 AD servers in 2 different countries, e.g. US and UK, and they set up the US and UK domains respectively. the accounts are set up such that all employees in both countries have a US\user and UK\user account. What is the difference if a UK user logon with US\user from a local UK computer, versus RDP (remote desktop) into a US server with US\user? Thanks for your help.

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• LIfebook lh531 inbuilt card reader not working

  - by chandrasekar

  Inbuilt card reader (SD/PRO/SDHC) not working. When I insert the memory card the indicator comes for a milli second and nothing happens. When I do lspci it gives the out put which is pasted below: I use Ubuntu 11.10. Pl help pro-hq@prohq-LIFEBOOK-LH531:~$ lspci 00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09) 00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) 00:16.0 Communication controller: Intel Corporation 6 Series/C200 Series Chipset Family MEI Controller #1 (rev 04) 00:1a.0 USB Controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2 (rev 05) 00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 05) 00:1c.0 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 1 (rev b5) 00:1c.2 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 3 (rev b5) 00:1d.0 USB Controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #1 (rev 05) 00:1f.0 ISA bridge: Intel Corporation HM65 Express Chipset Family LPC Controller (rev 05) 00:1f.2 SATA controller: Intel Corporation 6 Series/C200 Series Chipset Family 6 port SATA AHCI Controller (rev 05) 00:1f.3 SMBus: Intel Corporation 6 Series/C200 Series Chipset Family SMBus Controller (rev 05) 01:00.0 Network controller: Intel Corporation Centrino Advanced-N 6205 (rev 34) 02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 06) pro-hq@prohq-LIFEBOOK-LH531:~$

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• Workflow: suggest a versioning and file control for Designer and Developer

  - by Pennf0lio

  Our company are having hard time managing project files and managing versions of PSD, HTML, PHP, and CSS files. Can anyone recommend a good software or workflow to handle files and versions. Here's my common scenario: I work for a project in my computer, it could be a Website mockup or a coding project. I then save all the files locally in my workstation. I'll then upload all the project files in the server connected in our network to have a backup. In my files, I usually append a "r1" for revisions, like "WebsiteMockup_r1" or "WebsiteMockup_r2". I need somehow to synchronize all my local files to the server and have some versions options.

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• vps like [load] graphs

  - by foober

  I investigated a couple of tools but they were really annoying and not polished. kSar for exampe is supposed to graph sar output, but it doesn't work. There's a perl script around (sar2rrd) that's supposed to convert sar output in rrd format and generate graphs. Doesn't work. (at least it doesn't like the output of "atsar" as per debian/ubuntu package). Tried munin but it wants to mess with http servers, and for some reason it didn't really work, too. It displayed errors in the webpage generated by the http server it put on port 4949. So, is there a simple install and forget tool to generate daily load,cpu,memory,network graphs? It seems strange to me that this problem has not been solved, maybe I'm looking in the wrong places

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• One NIC going to sleep on Centos system

  - by sbleon

  I have two Dell boxes with two ethernet ports a piece. I have a cable directly connecting two of these ports, creating a tiny LAN with 10.3.3.x addresses. The other port on each box is hooked up to a switch and has a DHCP-supplied address to talk to the outside world. I've noticed that when scp'ing large files from one box to the other over the private LAN, the transfers sometimes stall. It appears that any other network activity on either box will cause the transfer to resume. Wake-on-LAN is disabled on all interfaces according to ethtool. What else could be causing these stalled transfers?

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• Providing high availability and failover using MySQL on EC2

  - by crb

  I would like to have a highly-available MySQL system, with automatic failover, running on Amazon EC2 instances. The standard approach to solving this is problem Heartbeat + DRBD, but I've found a lot of posts suggesting DRBD doesn't work on EC2, though none saying exactly why. Obviously, a serial heartbeat or distinct network is out of the question in the virtualised environment. It would also be good to have the different servers be in different availability zones, but we're getting into a much harder problem there. What are peoples' opinion on having a high uptime solution in "the cloud"? Note: This question was asked before RDS with multi-AZ was announced, which is the nice automatic answer for today's modern IT professional. :)

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• The Importance of Fully Specifying a Problem

  - by Alan

  I had a customer call this week where we were provided a forced crashdump and asked to determine why the system was hung. Normally when you are looking at a hung system, you will find a lot of threads blocked on various locks, and most likely very little actually running on the system (unless it's threads spinning on busy wait type locks). This vmcore showed none of that. In fact we were seeing hundreds of threads actively on cpu in the second before the dump was forced. This prompted the question back to the customer: What exactly were you seeing that made you believe that the system was hung? It took a few days to get a response, but the response that I got back was that they were not able to ssh into the system and when they tried to login to the console, they got the login prompt, but after typing "root" and hitting return, the console was no longer responsive. This description puts a whole new light on the "hang". You immediately start thinking "name services". Looking at the crashdump, yes the sshds are all in door calls to nscd, and nscd is idle waiting on responses from the network. Looking at the connections I see a lot of connections to the secure ldap port in CLOSE_WAIT, but more interestingly I am seeing a few connections over the non-secure ldap port to a different LDAP server just sitting open. My feeling at this point is that we have an either non-responding LDAP server, or one that is responding slowly, the resolution being to investigate that server. Moral When you log a service ticket for a "system hang", it's great to get the forced crashdump first up, but it's even better to get a description of what you observed to make to believe that the system was hung.

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• how to detect device type from connected device to router?

  - by molly

  i have a att router and there is an unknown device connected to my network. i cant seem to kick it off because of how att's router settings are created which is kind of dumb. i am able to see its local ip and mac address. i am on a mac with snow leopard. how can i get more information on the device with the information that i have? i want to see what kind of device it is, i have checked all deviced that are connected to the router and non seem to match the local ip that is connected. i have wpa encryption setup with a strong password.

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• How to set the IP address in a customized OpenWRT compilation

  - by Berdus

  I have been struggling today customizing OpenWRT. I checkout the stable using SVN, "make menuconfig" to customize the image, "make" it and run it on a router. Almost all my modifications work, except for the (Seemingly trivial) task of changing the default 192.168.1.1 address. I tried numerous files (scripts as well as config files) but I can't seem to change it (I can change it for a brief moment after boot using the "preinit" file, but after a few seconds it reverts to default). I suspect I should be setting it in the /etc/network file, but modifications there seem to be overwritten during boot. Maybe it has something to do with the br-lan interface? Does anybody have some thoughts on the subject? Thanks!

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• Monitoring host and app parameters in real-time

  - by devopsdude42

  I have a bunch of VMs that I need to monitor in real-time. For all nodes I need to watch host parameters like load, network usage and free memory; and for some I need app-specific metrics too, like redis (some vars from the output of INFO command) and nginx (like requests/sec, avg. request time). Ideally I'd also like to track some parameters from the custom apps that run on these node too. These parameters should get tracked as a bunch of line charts on a dashboard. I checked out graphite and it looks suitable (although the UX and aesthetics looks like it needs some love). But setting up and maintaining graphite looks to be a pain, esp. since we don't have a full-time person just for this. Are there any alternatives? Or at least something that is simpler to setup and will scale? Reasonable paid services are also ok.

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• Connecting switch to switch to router

  - by elated

  Hello, Not sure if this is the right place to ask this question. But I have a router which connects to the internet. Now I have a switch connected to this router. I added a lot more computers so I added another switch and connected it to the first switch using a cross-over cable. As soon as I connect it to the first switch, my lights in first switch start blinking like crazy and my entire network simply stops working. The minute I remove the second switch's wire, its all fine again. What could be the problem?

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• how're routing tables populated?

  - by Robbie Mckennie

  i've been reading "tcp/ip illustrated" and i started reading about ip forwarding. all about how you can receive a datagram and work out where to send it next based on the desination ip and your routing table. but what confused me is how (in a home network setting) the table itself is populated. is there a lower layer protocol at work here? does it come along with dhcp? or is it simply based on the ip address and netmask of each interface? i do know (from other books) that in the early days of ethernet one had to set up routing tables by hand, but i know i didn't do that.

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• Hurry! See the uncensored OOW videos before they get edited!

  - by rickramsey

  source Uploaded so far: Which Oracle Solaris 11 Technologies Have Sysadmins Been Using Most? Director's Cut - Uncensored - Markus Flierl, VP Solaris Core Engineering, describes how Oracle Solaris 11 customers are taking advantage of the Image Packaging System and the snapshot capability of ZFS to run more frequent updates of not only the OS, but also the applications (agile development, anyone?), and how they're using the network virtualization capabilities in Oracle Solaris 11 to isolate applications and manage workloads on the cloud. Watch How Hybrid Columnar Compression Saves Storage Space Director's Cut - Uncensored - Art Licht shows how hyprid columnar compression (HCC) compresses data 30x without slowing down other queries that the database is performing. First he shows what happens when he runs database queries without HCC, then he shows what happens when he runs the queries with HCC. Security Capabilities and Design in Oracle Solaris 11 Director's Cut - Uncensored - Compliance reporting. Extended policy. Immutable zones. Three of the best minds in Oracle Solaris security explain what they are, what customers are doing with them, and how they were engineered. Filmed at Oracle Open World 2012. Why DTrace and Ksplice Have Made Oracle Linux 6 Popular with Sysadmins Use the DTrace scripts you wrote for Oracle Solaris on Oracle Linux without modification. Wim Coekaerts, VP of Engineering for Oracle Linux, explains how this capability of DTrace, the zero downtime updates enabled by KSplice, and other performance and stability enhancements have made Oracle Linux 6 popular with sysadmins. Why Solaris 11 Is Being Adopted Faster Than Solaris 10 Sneak Preview - Uncut Version - Lynn Rohrer, Director of Oracle Solaris Product Management explains why customers are adopting Oracle Solaris 11 at a faster rate than Oracle Solaris 10, and proves why you should never challenge a Montana woman to a test of strength. What Forsythe Corp Is Helping Its Customers Do With Oracle Solaris 11 Director's Cut - Unedited - Lee Diamante, Solutions Architect for Forsythe Corp, an Oracle Solaris Partner, explains why Forsythe has been recommending Oracle Solaris to its customers, and what those customers have been doing with it. Lots more to come ... - Rick Website Newsletter Facebook Twitter

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• Restarted computer, now wireless and Visual Studio is broken

  - by Earlz

  I installed the new update for TortoiseSVN which requires a restart. Upon restarting a lot of things broke. I'm currently running a virus scan, but what would cause this? Among the things that no longer work is Visual Studio. It now says "Invalid License Data. A reinstall is required" and my wireless internet does not work. When I go to connect to my network it will say "Can not connect" and then when I diagnose the problem it says "The connection to accesspoint-name was cancelled" (and yes, canceled is misspelt like that) What could have caused this? My computer did not install any updates or anything like that upon restarting and it was running fine before I restarted it.

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• Lost WiFi after 12.10 upgrade

  - by Steven Guillory

  I received my new Dell Vostro 2420 last week, and just got around to upgrading from 11.10 to 12.10. Unfortunately, like many others (after researching the issue), I no longer have WiFi. I have tried every sudo command given that worked for others, and still can't get my wireless to function. I am new to Linux, so any and all help is appreciated. Thanks in advance! Edit: I can connect via ethernet, just not via wifi. As a matter of fact, when I use Fn + F2 to turn on wifi, only my bluetooth comes on. lspci 00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09) 00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) 00:16.0 Communication controller: Intel Corporation Panther Point MEI Controller #1 (rev 04) 00:1a.0 USB controller: Intel Corporation Panther Point USB Enhanced Host Controller #2 (rev 04) 00:1b.0 Audio device: Intel Corporation Panther Point High Definition Audio Controller (rev 04) 00:1c.0 PCI bridge: Intel Corporation Panther Point PCI Express Root Port 1 (rev c4) 00:1c.3 PCI bridge: Intel Corporation Panther Point PCI Express Root Port 4 (rev c4) 00:1c.5 PCI bridge: Intel Corporation Panther Point PCI Express Root Port 6 (rev c4) 00:1d.0 USB controller: Intel Corporation Panther Point USB Enhanced Host Controller #1 (rev 04) 00:1f.0 ISA bridge: Intel Corporation Panther Point LPC Controller (rev 04) 00:1f.2 SATA controller: Intel Corporation Panther Point 6 port SATA Controller [AHCI mode] (rev 04) 00:1f.3 SMBus: Intel Corporation Panther Point SMBus Controller (rev 04) 07:00.0 Network controller: Broadcom Corporation Device 4365 (rev 01) 09:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 07) This is what I am getting... dpkg: error: --install needs at least one package archive file argument Type dpkg --help for help about installing and deinstalling packages [*]; Use dselect or aptitude for user-friendly package management; Type dpkg -Dhelp for a list of dpkg debug flag values; Type dpkg --force-help for a list of forcing options; Type dpkg-deb --help for help about manipulating *.deb files; Options marked [*] produce a lot of output - pipe it through less or more !

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• how do i automatically add a new route to the routing table?

  - by Robbie Mckennie

  I'm looking at linking two networks with a long range Ethernet bridge. I know I can connect my two networks with a router, but my problem is how will my computers know where to send packets if I don't add the route manually? I COULD add them manually, but it seems like a hassle. I have very very limited knowledge of RIP (I know it has something to do with routing), but I don't know how to use it. edit: My vision for the network would be the 2 networks (which are currently independent home networks), connected by a microwave Ethernet link. I assumed i'd need a router on one end of the bridge, to handle communication between the 2 networks.

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• where do i find the drivers for a F5D7000 Belkin wireless adapter?

  - by neubert

  So I plugged an F5D7000 Belkin desktop wireless adapter into my desktop. Here is a picture of it: I did a Google search and found the drivers. I installed the latest version - (F5D7000 - Driver - Version 8xxx), and the NIC is still unrecognized as per the next screenshot: Does anyone have any ideas on how to get this working? I'm running Windows XP SP3 32-bit. (I have taken a screenshot but without network connectivity I can't email it or post it anywhere and I don't have a USB stick.)

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• Is it a bad idea to make roaming profile share available offline?

  - by Bryan

  This is regarding a Windows 2008 R2 domain. The Documents, Desktop, Application Data folders are all redirected to users' home directory (mapped as Z:). The users home directory is configured to be offline for mobile users. User profiles are configured as roaming, and located on a separate share (not mapped as a network drive), just accessed via an UNC path. Would it be a good or idea to make the roaming profile share available offline for mobile users using the caching option "All files and programs that users open from the share will be automatically available offline"?

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• OpenVZ multiple networks on CTs

  - by user6733

  I have Hardware Node (HN) which has 2 physical interfaces (eth0, eth1). I'm playing with OpenVZ and want to let my containers (CTs) have access to both of those interfaces. I'm using basic configuration - venet. CTs are fine to access eth0 (public interface). But I can't get CTs to get access to eth1 (private network). I tried: # on HN vzctl set 101 --ipadd 192.168.1.101 --save vzctl enter 101 ping 192.168.1.2 # no response here ifconfig # on CT returns lo (127.0.0.1), venet0 (127.0.0.1), venet0:0 (95.168.xxx.xxx), venet0:1 (192.168.1.101) I believe that the main problem is that all packets flows through eth0 on HN (figured out using tcpdump). So the problem might be in routes on HN. Or is my logic here all wrong? I just need access to both interfaces (networks) on HN from CTs. Nothing complicated.

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• Can Windows 7 restore itself from image to a smaller HDD than original?

  - by Borek

  I've created a full system image using the built-in Win7 utility, it was from a 300GB drive but there is only about 50GB of data. I then swapped disks in my notebook, the new one being 80GB SSD and now when I boot to the system restore applet, go through all of the settings (finding the backed up image on a network share, confirming that I'm willing to repartition my disk etc.), I get this: The system image restore failed. No disk that can be used for recovering the system disk can be found. [Details] Is this because I'm trying to restore to a smaller disk? (Even though the data should fit without any problems, there being only 50GB of it.)

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• Getting error code -41 when copying files to external drive

  - by diego

  I'm having trouble copying some files from my mac to an external hard drive: I keep getting the nondescript "error code -41". I noticed some of the files with an additional "@" permission bit had the "com.apple.quarantine" flag set. I used the "xattr" command from this article What should I do about com.apple.quarantine? to take care of the quarantine flag and sort that out (these files were copied over from another mac on my network, so I guess OS X flagged them as quarantine). That took care of the problem for those files but I still have some that I can't manually copy over to the external drive. The only other thing I've noticed is that some of these files have a an extra permission bit: "drwxr-xr-x+" which I haven't been successful in googling. Aside from that I don't see anything else. Also, Disk Utility says everything's fine. Any help would be greatly appreciated.

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• Windows Login Failure

  - by Chris Bateson

  I'm getting an error in the Event Viewer, which is also generating a lot of Logon Failure messages on our syslog server. Pretty much stuck on how to resolve. EventID: 536 Logon Type: 3 Reason: The NetLogon component is not active This is for a Windows Server 2003 system. I have checked here We're using Shavlik Protect 9 to scan and deploy patches. Shavlik stores the credentials for the systems and uses those stored credentials to deploy patches. This system is able to scan and deploy to other systems on the network using those credentials and no errors are generated. When installing to the local system that Shavlik is physically on then this error is generated. Whats interesting is that it doesn't generate during a scan, and the patches install fine. We've contacted Shavlik to get the response that they are unable to help since it's a Microsoft error. Has anyone seen this?

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• How to remove the dlinksearch browser search hijack

  - by Bish

  Hi Gang, For the last few weeks all the machines on my home network are having the same problem whilst browsing the internet. When the user enters an invalid URL in the browser address bar, instead of the default browser behaviour, the request is sent to http://www1.dlinksearch.com/. As far as I can tell this is all machines and all browsers. It is so consistent I am wondering whether it has anything to do with our router. We use a DLink DIR-655 router so maybe the clue is in the name :) Anyhow, I cannot figure out how to disable/remove the offending behaviour. I've checked hosts files, spyware, AV etc. etc. Anybody have any ideas? Paul P.S. Apologies if this is not the right place to ask this type of question. I'm a bit stuck

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• How can I register a custom protocol with xdg?

  - by julien

  I've been struggling this morning trying to associate an application with a custom protocol, namely emacsclient and org-protocol. I'm calling this protocol from a webbrowser bookmarklet, and I get the following behaviour : In chromium, the "Launch Application" dialog comes up, and calls xdg-open org-protocol://... which ends up firing a new chromium frame. In firefox, I've tried setting network.protocol-handler.app.org-protocol to an empty string or my emacsclient path, anyhow I get the following error message : "Firefox doesn't know how to open this address, because the protocol (org-protocol) isn't associated with any program" without even showing any external application selection dialog. I'm not using any desktop environment, so I need to make this work strictly with xdg, however, despite reading the shared mime info spec etc, I still can't fathom a working configuration.

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• Advice for migrating email server

  - by Chris Adams

  Hi there, I'm planning to migrate a Zimbra server with about 200gb of data from a server hosted in an office into a datacentre, to increase uptime (we've had a couple of outages when our network here started flaking out, and we have people in other countries relying on this server too). However, I'm not sure how best to migrate the data into the data centre without rendering the connection unusable during office hours, because there's far too much to send in over night over the two meg upstream connection we have here. I'm familiar with using tools like nice to stop a long running process degrading machine performance - is there a simple way to throttle a connection between office hours, so the long running transfer doesn't block the pipe, but then opens up outside of office hours to make the most of the bandwidth? I'm aware the alternative here is to simply mail a hard drive to the data centre, but I'd like to avoid doing that if I could. We're using Centos Linux for our servers, in the office and the datacentre, so extra points for an open source linux answer.

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