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• How to get access to console to reset Cisco 3750?

  - by genehack

  I acquired two Cisco 3750 switches from another part of my organization. I was able to complete the standard password/config reset procedure on one without any issues -- boot it, put it into express config mode, telnet in, reset the passwords, etc. The second one doesn't ever boot to the point where it displays anything on the console. When power cycled, the 'SYST' light flashes green a few times, then comes on a solid green and stays lit. None of the other lights ever flash or light up. Holding down the 'MODE' button for up to 30 seconds produces no noticeable effects. Nothing ever comes out on the console. Since I was able to configure the first one without any problems, I know my connectinon is good -- console port configured right, good cable, etc. Is this just a hardware problem with the switch? Is there any way I can recover from this and get the switch back into a state where I can configure it?

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• What are the mandatory Linux kernel modules to run inside of ESXi

  - by Marcin

  I'm used to rolling my own kernels for servers, as it nicely minimizes the number of exploits (and the resulting patches) to take care of. In a traditional (bare metal) world, the whole process is about knowing what you have (hardware), and what you need (Ethernet, IPv4, iptables, etc.) In a virtualized environment, some things stay the same (still need Ethernet and IPv4), some things go away (power management), and then there are some new needs (vxnet3, or vmware-tools, even though that's compiled outside of the kernel). So my question mostly concerns itself with the last two categories: what can I remove completely, and what new stuff do I want? For example, what IO scheduler do I want, if all my disk operations are going through another filesystem/scheduler/cache to get to the virtual disk? Do I need hyper-threading enabled, or is the VM going to show them to me anyway as a CPU anyway? Do I need Large Receive Offload turned on, or is that something that the hypervisor's network drivers are going to do for me?

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• Moving mails from SBS 2008 to SBS 2011

  - by starchx

  we are going to upgrade server from SBS 2008 to a new hardware server with SBS 2011. Due to non-experience in Server Migration (eg, answer file), we have decided to choose Clean Install. We have 12 users so that's not too bad. The most challenge problem is to move over all the emails for each user, some user have 5GB inbox. The one method I know is to login to each user account and export the emails to PST file using Outlook 2007. Then connect to new SBS 2011 and import the PST into new inbox. Do we have any other better/quicker ways? Thanks

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• Windows Firewall failing after 9-12 hours?

  - by routeNpingme

  I have 2 VM servers in the exact same NIC configuration: Server 2003 R2, one NIC connected to private (hardware firewall) network in a 10.x private address space, and one NIC connected straight to public internet. Windows Firewall is enabled for the Public Internet NIC only. Now, what doesn't make sense - this fails generally after 9-12 hours. It's not exact, but once or twice a day, traffic will just stop on the Internet NIC. No event log entries when it happens, and restarting the Windows Firewall service as well as stopping or restarting IPSec Services (just for fun) has no effect. Once the server is rebooted, everything is fine again for another 1/2 day. Any suggestions?

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• TextMate - completion using an external file or file contained in project?

  - by Neil Baldwin

  Does anyone know how to get TextMate to search an external file (or even the files contained in a TextMate "project") with which to perform word completion? I'm coding some stuff on the C64 (using TextMate to write the code) and I have an external file containing labels for all of the hardware registers/kernal routines e.g VIC2InteruptStatus = $D019 It would be really handy to be able to type, say, 'VIC2I' then press the key for word completion and have TextMate find matches in the external library file. Rather than how I'm having to do it at the moment by opening the library file and copy-paste the register names into my code.

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• Is there a way to enable metro on a 1024x600 netbook?

  - by scatmoi

  Windows 8 Consumer Preview works great on my 1024x600 netbook but, for some strange reason, Microsoft decided to provide its Metro interface only to 1024x768 and up screens. "Strange" because Android can work with as little as 240x320 screens, and I know that Microsoft is presumably targeting smartphones, too, in its upcoming Windows 8. The interface itself is there with all the panels etc. but when one of the rectangles is pressed, Windows 8 just refuses to launch any application (even Internet Explorer), except for Windows Explorer. Looks to me like this isn't a real hardware limitation but some arbitrary flag set in the registry. Is there any way or tweak to enable the Metro interface on 1024x600 screen?

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• Are there significant performance difference between chipsets?

  - by Let_Me_Be

  I wanted to build a single PC to fit all my needs, but since hardware virtualization support (Vt-d specifically) is a huge problem, I decided to build multiple single-use oriented computers. In this scenario I want these computers to be as minimal as possible. So the core of my question is: "Are there significant performance difference between chipsets?" I'm considering Sandy-Bridge i7 or i5 for my "game console" computer. And since I will use only one graphic card, one or two HDD, 4-8GB RAM and nothing else, I would be fine with a micro-ATX board with a Q67 (or some other low-end chipset).

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• Debian Linux server hangs after a week or so

  - by Alex Flo

  I have 2 Debian Linux 6.0.4 servers that have a strange behaviour: after 5-7-10 days they hang. By this I mean the servers need to be restarted and before that ping won't answer. I've been struggling with this problem for a couple of months now and here's some thoughts/what I tried without being able to solve the problem. I changed the RAM on a server. Being 2 different servers I doubt that it could be something related to hardware as a 3rd identical server won't have this problem. I logged the server load and when it crashes the load is fine (quite low) I cannot find anything in the server logs, logs are fine till the server freezes. I don't have access to console unfortunately. While I have years of admin experience I have never encountered such an issue and right now I have no idea where else to investigate. If you have an idea of what I could try in order to fix the problem please share it with me:-)

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• How can I use a computer as a router and send all client traffic through anonymous proxies?

  - by Terrapin

  Is there a way that I can setup a spare box as a router on my network, and route client traffic through a proxy in order to hide my location? Specifically, I would like internet traffic to/from my Roku Box to be routed via proxy, but there is no proxy support built in to the Roku. So I would like wire my Roku directly my computer's second NIC, and force all traffic through a proxy. What kind of software and hardware setup will I need? Also, which anonymous proxy service are best for this purpose? I'm not interesting in full anonymity or encryption. I simply want to mask my location while providing the best possible throughput.

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• mount dev, proc, sys in a chroot environment?

  - by Patrick

  I'm trying to create a Linux image with custom picked packages. I followed the guide here http://www.olpcnews.com/forum/index.php?topic=4766.0 However, when I tried to install some packages, it failed to configure due to missing the proc, sys, dev directories. So, I learned from other places that I need to "mount" the host proc, ... directories to my chroot environment. Though, I saw two syntax and am not sure which one to use. In host machine: mount --bind /proc <chroot dir>/proc and another syntax (in chroot envrionment): mount -t proc none /proc Which one should I use, and what are the difference? Edit: What I'm trying to do is to hand craft the packages I'm going to use on an XO laptop, because compiling packages takes really long time on the real XO hardware, if I can build all the packages I need and just flash the image to the XO, I can save time and space.

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• How do I troubleshoot CanoScan LIDE20 on Ubuntu 9.10 in VirtualBox?

  - by kara-marfia

  This may be a VirtualBox question more than anything else. The host OS is Win7, which sees the scanner, but has no drivers for it. VirtualBox sees & recognizes the scanner as "Cannon Scan" and shows "state captured" when I hover over USB devices. Searching gives me many happy reports of this particular scanner being well supported, and that SANE should work with it immediately (also listedin the Supported Hardware List. I get "no devices available" from XSane... and I'm not sure where else I can check. I'd like to see if VirtualBox is telling the truth and find out if the USB port is actually being fed into the virtual OS. Can anyone point me in the right direction of where/how to do that in Ubuntu? Or other bright ideas. I'm starting with a little project to add some zing to my beginner linux studies - I'm sure I haven't checked some obvious things, because I don't know them yet. ;)

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• XenServer/Center: Shared SRs for hosts not in same pool?

  - by 3molo

  I would like to use the same SRs on XenServer hosts that are not able to be part of the same pool (because of not having the exact same cpu feature set, if I understand it correctly) in order to share templates, being able to (manually) start a host on another node, backing up running hosts on other hardware etc etc. The technology for SR can be any of iSCSI, NFS or CIFS, iSCSI would obviously be preferred. Trying to add an iSCSI volume renders a "This LUN is already in use as SR iSCSI - Shared Storage on pool xxxxxx.". Adding a NFS share on one XS host, creating a template there and then checking another XS host reveals they don't agree on used space etc. Coming from a vSphere world this is quite baffling, but if these are limitations then I will have to rethink some of the concepts for this low budget project.

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• Monitor turns off about 1 second after turning it on

  - by r0ca

  Hi all! I have a hardware issue with some of the LCD monitors we have in our office. My problems is not related to video cards or anything else with the computer itself. I have 2 Dell 17" LCD screens that goes off (blank) after 1 or 2 seconds. The light remains green so it's not idling or sleeping. Just this morning, I had to replace one that goes off on 2 workstations and also on my laptop. Nothing to do with it. I tried the VGA and DVI connection w/out luck. I strongly think that this is something with a capacitor or something inside the screen but I can't figure out what it is... Is anybody heard of that kind of issue before? Regards, David.

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• Can't find generic USB audio driver for a Samson COU1 USB microphone

  - by user10321

  I am unable to use a Samson USB CO1U microphone on a PC running XP, SP3. When I plug it into the USB port, Windows generates the sound indicating that it has found new hardware, and the green LED on the mic lights. But, it does not work, and the device manager reports that it cannot find a driver after searching. The same mic works on a Vista machine. Samson has no driver on their Web site, and insists that the generic audio driver in Windows should work. (http://www.samsontech.com/PRODUCTS/productpage.cfm?prodID=1810). I cannot find a generic USB audio driver at Microsoft.com. Can anyone help? Larry

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• How do UEFI and virtual machines relate to each other?

  - by Iterator

  I am trying to get my head around UEFI (Unified Extensible Firmware Interface) and it's not entirely clear to me how this affects virtual machines. Thus, there are three parts to this question: Is UEFI an advance in hardware support for virtualization? All other things being equal, would a machine with UEFI be more likely to run a virtual machine more efficiently than one without, or does UEFI cause any performance hits that negate any speed improvements from a virtual machine? Would the difference in execution be visible to code running in a virtual machine? (In theory, it shouldn't, but in practice?)

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• MBP becomes very hot after using Xcode

  - by Globalhawk

  Hardware: MBP early 2011 version OS: Mountain lion App: Xcode 4.5.2 Problem: Every time when I start Xcode, 2 or 3 processes called "git" start running. But when I quit Xcode the "git" process won't quit and are still using a lot of CPU. Then the computer becomes quite hot and the battery gets drained very quickly. If I manually kill these processes the problem is gone. I tried to reinstall Xcode several times but the problem comes back every time. It drives me crazy. Any help will be appreciated!

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• Configuration Tuning for PostgreSQL 9.1 PostGIS 1.5 Ubuntu 12.04 Server

  - by Martin

  My server performance is poor. At times SSH, top, and other features or commands are very slow to respond, taking several seconds or more. A query that normally takes 5 minutes can sometimes take 30 minutes. The database is mostly being used to do a spatial query (grid and summarize) on approximately 500GB of stored data spread between 4 tables. Restarting the server works as a temporary fix, but cannot be used as a long term solution. Any suggestions for how to diagnose and solve my performance issues? Hardware and Configuration: 3.3 GHz Intel quad core i5 16 GB DDR3 RAM 6 TB software RAID 10 (6 x 2 TB drives) Ubuntu 12.04 64-bit Postgres 9.1 PostGIS 1.5

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• How to play games in widescreen in Windows 7, Dell Studio 1555

  - by blasteralfred

  I have a dell studio 1555 laptop with a GPU inside. The details are below; Hardware details Software details I can play games in widescreen in Vista, but not in 7. I am using Windows 7 Home Premium. I have the latest Catalyst Control Center. Instead of widescreen, the games are running in a classic style, say 1024x768 ratio. When I play need for speed underground, the maximum possible resolution is 1024x768 (all other games are like this). I have no problem with HD videos and anything else. How can I fix this? Thanks in advance...:)

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• Quad Core host with hyper-threading, how many processors to configure in VirtualBox?

  - by Anthony

  I have a quad-core i7 processor with hyperthreading (8 logical cores), when I configured a virtual machine to use 8 processors, VirtualBox gave me a warning saying that I only have four cores (which is true) and that this may cause a performance issue. But hyper-threading is a hardware feature, so the OS sees 8 cores and it sends instructions to all 8. What if setting it to 4 caused the VM to use 2 cores (4 threads) instead of 4 simultaneous threads (on all 4 cores)? Does the warning I got take into account that my machine has hyper-threading?

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• Dual-WAN router

  - by aix

  I am looking for a router that would fit the following requirements: Two WAN interfaces: the primary is PPPoE, the secondary will link to a GigE port on another router (a 100Mbps link will suffice); Two (ideally four) GigE LAN ports; No requirement for a firewall; No requirement for Wi-Fi; Inexpensive. The plan for the two WAN interfaces is as follows. All outbound traffic will go to the primary, with exceptions based on destination IP/subnet or possibly on src+dest IPs/subnets. Such exceptions should be routed to the secondary. It would be very nice if, should the primary go down, the secondary would automatically take over for all outbound traffic. I am reasonably sure that I can put something together based on dd-wrt. However, I'd like to hear from you what alternatives are out there (especially something easier to set up for my use case, even if it means paying more for the hardware.)

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• Difference between tc qdisc and netdev_max_backlog

  - by Mediocre Gopher

  I'm wondering what the difference between these two things on linux is. According to the docs tc qdisc can be used to set the queue size for egress and ingress packets coming in and out of the NIC (or that's how I understood it). But from what I understand netdev_max_backlog can also be used to set this. If I were to set both of them which would be used? Or are there actually two queues that are being manipulated in this case? If there are two queues, which queue is above the other (if the application is at the top and the hardware at the bottom)?

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• MSTSC Not working, disconnects shortly after connecting

  - by F4r-20

  I'm currently having a problem connecting remotely to a server. It is a brand new build Windows 2008 R2, remote users are enabled. I'm trying to connect from a Windows 7 machine. Everytime I remotely connect to the server it will stay connected for a matter of seconds (maybe 3-5) and then disconnect and I get the standard old cannot connect and list of reasons it could be. Then I cannot connect again and get this prompt until I restart the server. As soon as it's finished restarting, it happens all over again. The network and hardware configuration between the two machines is completely reliable. Does anybody know what else I could try? Thanks.

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• How do I create a Windows 7 USB installer with preinstalled software?

  - by Marcel

  I was wondering if it was possible to make a bootlable image of a Windows 7 Pro OEM Installation CD that I have and put it on an USB stick for faster/easier installation. I am asking because we have a couple of PC´s where I´d have to install the OS using the same key (MAK). Also is it possible to kind of populate that image with software that would have to be installed anyways on all machines (like Chrome, Outlook, etc)? It would be really helpful to just install a Windows 7 image with customized software already installed. I would just make an image of an OS and use that, but the hardware of the machines differ.

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• Security tips for adding wireless AP to domain network?

  - by Cy

  I am researching best-practices for adding wireless to our existing domain network. My DHCP server is running Windows Server 03 Standard (not sure if thats useful). I am familiar with simple home networking but I thought I'd get some expert advice for the more advanced stuff. Any tips and / or best-practices? Is this Cisco Wireless Access Point a good option? Are there any additional hardware recommendations? Thank you in advance for your help.

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• TV video constantly skips 1/2 second, plays 1 second; green on bottom

  - by Robert

  I just got DirecTV. It worked for a day, but now the TV video constantly skips 1/2 second, then plays 1 second. Also, the bottom 5th of the screen is solid green. The audio does not skip. I tried to do "Set up TV signal" (in Media Center) - but I get an error. See the post I just made here titled "Error - “IR Hardware not detected” - but it’s installed/working." Thanks for your help.

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