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• How to rescan and remount drives on Ubuntu Hardy or Jaunty?

  - by pts

  When I connect an USB drive to an Ununtu Hardy and Jaunty system, the system mounts the partitions found on the drive, and opens a Nautilus window for each mounted partitions. Within Nautilus, I am able to unmount partitions. What I need is a command or action which forces the system to rescan the available drives and partitions, and automount each not mounted partition, including those which I've manually unmounted from Nautilus. sudo /etc/init.d/udev restart or ... reload doesn't do this. As of now, I just unplug the USB drive, and commect it again, which will force a scan and a mount on that drive. But I want to do force the rescan and remount without unplugging anything, preferably without the user having the know device or drive names.

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• Windows 7 USB power lose after a few seconds / minutes

  - by Stefan Dunn

  My friend's computer has a problem where the USB ports causes problems with the power of some devices connected to the computer. The USB mouse has no problems, however the Wireless Adapter looses power after around 20 seconds of use and USB Flash Drives cause the computer to either freeze, lose power (and become unresponsive) or become disconnected (still shown in Device Manager, but not in My Computer) when trying to transfer any type of file to / from the computer. I have a suspicion it's the Motherboard but could it also be a Software problem? Tried a new case, RAM, CPU and GFX Card which had no effect. The problem occurs on both the Front USB and Back (Motherboard) USB Ports. UPDATE: Tried the USB devices with an Ubuntu Live CD and they work fine, could this mean it's a problem with Windows (x64)?

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• Call issue with Freeswitch

  - by gbraad

  I am testing the following with Freeswitch and different devices (nokia n900, nokia e60, ekiga) and have similar results between them. On the Freeswitch server (1.0.4 in multi-tenant mode) I have several user profiles for a domain, e.g. 1000, 1001 for host.com The user are authenticated correctly and calls can be placede. When I place a call from a device registered as [email protected] to [email protected] it will show up at the other end (1002) as [email protected] I would expect this call to show up as [email protected]. The IP address is the one of from the Freeswitch server. Because of this, the calls are no correctly recognized by the address book on certain devices. Can the he domain FQDN of the callers domain/acount be used, instead of the IP address of the server in the SIP uri?

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• Virtual fiber channel HBA in Solaris

  - by Phil

  We are trying to set up some virtual Fibre Channel HBA's in Solaris. This seems to be possible with NPIV. Creating NPIV's in a Solaris global zone works fine, but passing that NPIV to a zone didn't work at all. We tried to pass the NPIV as following: # zonecfg -z zone1 'info' zonename: studentz1 [...] device: match: /devices/pci@0,0/pci8086,25f9@6/pci8086,350c@0,3/pci1077,140@4/fp@1,0:devctl allow-partition not specified allow-raw-io not specified Wat we want to do is, set up an environment for SAN exercises. We don't have a physical host per student, so we try to virtualise that in some way (Solaris zones or VMware). It should be possible to display the WWN of the virtual HBA and mount the storage presented by the disk subsystem. Any ideas to pass the NPIV to a solaris zone or to virtualise this with vmware?

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• Connect wired-only devices to a remote wireless access point?

  - by billpg

  Hi everyone. In building A, I have a Netgear wireless access point using WPA2. Works great, no problems. In building B, I have some devices that only have wired Ethernet ports. They can't see my access point. What I need is a gizmo that connects over-the-air to my access point in building A, talks WPA2, and converts the packets to and from a wired Ethernet port. Netgear-access-point in building A      (WPA2 WiFi) Wireless bridge device          <-- Looking for this.      (Cat5 ethernet) My devices in building B. I've looked for devices on Amazon, but the descriptions are infuriatingly unclear. It says it supports WPA2, but does it support it as a client? Grrr... Any recommendations please?

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• Changing Network Path of Offline Files

  - by Adam

  Many of our users have their Home folder set as Available Offline. Their Windows 7 laptops will not be back on our network for a few weeks. In the mean time, we're setting up new servers and reorganizing our files, so the network path to the Home folder is going to be completely different. Based on some testing I did, when the users return, any files they've created or modified while offline will be gone, and the new Home folder will be there and not set to sync. The offline cache of the old Home folder is still accessible through the Sync Center, but they're not going to want to dig through that and try to find what's missing. Avoiding this would involve keeping the old server around and moving everyone to the new location in person, so we know for sure they're synced first. Is there any way to avoid this that isn't as tedious, like a quick registry edit or something that will point the old offline cache to the new location?

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• Xerox Workcentre 3119 and Linux

  - by Milan Babuškov

  I'm trying to get Xerox Workcentre 3119 printer to work on Linux. It's a multifunction device (printer and scanner). I run the CUPS web interface at: http://localhost:631/ and it recognizes it on USB port and even suggests Gutenprint driver from the list. When I try to print a test page, the printer goes through "warming up" process (i.e. lights blink and sound is heard) but does not print anything. There are no errors in /var/log/cups/error_log and access_log shows as if everything is ok. The printer works fine in Windows XP. Does anyone have any experience with this printer on Linux?

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• Hyper-V Cluster with failover - NETWORKING

  - by Adam

  Hi We are looking to setup a 3 node Hyper-V cluster with live migration and failover using: 3 x Dell R710's with dual quad core Xeon & 128 GB RAM & 6 NICs in each 1 x Dell MD 3220i SAN We will be running this setup from a data center and so co-locating our kit. Can anybody explain how we should setup the network connections to make the system redundant? We have looked into this great article but are not sure how to get a 3 server setup correctly and reliably: http://faultbucket.ca/2011/01/hyper-v-failover-cluster-setup/. I believe we need network connections for: live migration, heartbeat, management, hyper-v etc. I assume as we are running it from a DC all IPs will have to be public IPs? Are AD servers will be VMs. One on each Hyper-V server and setup not to be HA.

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• Experience with AMCC 3ware 9650se raid cards? Ours seems dead

  - by antiduh

  We have a 8-port 3ware 9650se raid card for our main disk array. We had to bring the server down for a pending power outage, and when we turned the machine back on, the raid card never started. This card has been in service for a couple years without problems, and was working up until the shutdown. Now, when we turn the machine on, the bios option rom that normally kicks in before the bootloader doesn't show up, none of the drives start, and when the OS tries to access the device, it just times out. The firmware on it has been upgraded in the past, so it's possible we've hit some sort of firmware bug. We're using it in a Silicon Mechanics R272 machine with gentoo for the OS. The OS eventually boots, but alas, without the card. We've ordered a new one, but I'm worried that if we replace the card it won't recognize the existing array. Has anybody performed a card swap before? Any help would be greatly appreciated.

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• LM Sensors always returning same (invalid) value for one temp sensor

  - by pkaeding

  I am trying to monitor the temp sensors on a server, and plot them using Cacti. I have lm-sensors installed and working correctly. For example, here is the output from sensors: % sensors acpitz-virtual-0 Adapter: Virtual device temp1: +26.8 C (crit = +100.0 C) temp2: +32.0 C (crit = +60.0 C) coretemp-isa-0000 Adapter: ISA adapter Core 0: +36.0 C (high = +105.0 C, crit = +105.0 C) coretemp-isa-0001 Adapter: ISA adapter Core 1: +42.0 C (high = +105.0 C, crit = +105.0 C) However, when I try to get this data via SNMP, I get only one sensor's temperature correctly, and another one always returns 100.000 C: % snmpwalk -Os -c public -v 1 10.8.0.18 -m ALL lmTempSensors lmTempSensorsIndex.1 = INTEGER: 0 lmTempSensorsIndex.2 = INTEGER: 1 lmTempSensorsDevice.1 = STRING: temp1 lmTempSensorsDevice.2 = STRING: temp1 lmTempSensorsValue.1 = Gauge32: 26800 lmTempSensorsValue.2 = Gauge32: 100000 So, my question is two-fold: Why is the second sensor that is returned by SNMP giving a value of 100 C (when it should be 32 C) Why are my CPU core sensors not being returned by SNMP?

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• SMTP port open - but not open

  - by Frederik Nielsen

  As some of you might know, I am setting up an exchange server. Now I ran into another problem: I cannot connect to the SMTP service from outside the server! The ports are opened in the gateway device (a ZyXEL USG50), Windows firewall is off. I see the packets travekl through the ZyXEL firewall, and I can also see the packets with wireshark on the server, so I know they are getting all the way in to the server. I also know it receives them, and sends out the reply - and this is where things go bad! Analyzing with wireshark, I get these errors in the return packets: Header checksum: 0x0000 [incorrect, should be 0x0779 (may be caused by "IP checksum offload"?)] And: Acknowledgment Number: 0x8e3337d1 [should be 0x00000000 because ACK flag is not set] What the (sorry my French) hell is going on? I really cant figure it out.. Thanks in advance.

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• 2 routers, both DHCP, no IP assigned

  - by piobyz

  I can't get DHCP to assign IP to my wireless devices. My network config is as follows: Nanostation5 Linksys WRT350N, which is connected with Nanostation via its INTERNET port. Nanostation: LAN IP Address: 192.168.1.20 WLAN IP Address: 192.168.0.79 Network Mode: Router and is getting its IP via DHCP from my ISP Netmask: 255.255.255.0 Gateway IP: 192.168.1.1 LAN Network settings: IP Address: 192.168.1.20 Netmask: 255.255.255.0 Enable NAT: YES ENABLE DHCP Server: YES Range 192.168.1.100 ~ 250 Netmask: 255.255.255.0 Enable DNS Proxy: YES Linksys: Internet Connection Type: DHCP Router IP: 192.168.2.1 Subnet Mask: 255.255.255.0 DHCP: Enabled Start IP: 192.168.2.100 ~ 120 Advanced Routing: NAT: Enabled What I can do is connecting manually with this config: IP: 192.168.2.101 Subnet Mask: 255.255.255.0 Router: 192.168.2.1 DNS: 192.168.1.20 Search domains: WRT350N I want to be able to connect to both routers independently(now its 192.168.1.20 for Nanostation, and 192.168.2.1 for Linksys) and connect any wireless device using DHCP. What should be IP ranges, masks, etc. on both devices?

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• Using MythTV to Stream Satellite Signal to multiple users

  - by Ammar

  I'm planning on setting up a small media center to achieve the following: I have multiple users who want to watch satellite channels I want them to be able to change the channel remotely I'm going to buy an external DVB to capture the signal Use some software to stream the channel that is selected I want to have 2 different channels at the same time, I assume I will need two DVB cards Users use VLC or Windows Media Player or whatever to view the channels How can I achieve this? I heard MythTV can do it? I tried to do some research I couldn't find enough information. Note: There's no copyright issue here. I'm streaming Free-To-Air (FTA) channels.

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• Where does power consumption go in a computer?

  - by Johannes Rössel

  Today we had a weird discussion over lunch: What exactly causes power consumption in a computer, particularly in the CPU? Figures you usually see indicate that only a percentage (albeit a large one) of the power consumption ends up in heat. However, what exactly does happen with the rest? A CPU isn't (anymore) a device that mechanically moves parts, emits light or uses other ways of transforming energy. Conservation of energy dictates that all energy going in has to go out somewhere and for something like a CPU I seriously can't imagine that output being anything but heat. Us being computer science instead of electrical engineering students certainly didn't help in accurately answering the question.

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• Backing up Initial and Running configurations for Nortel Baystack 325-24G

  - by i.h4d35

  I recently came across a Nortel Baystack 325-24G switch. This is the first time I've come across a Nortel device of any sort, so I am a little intimidated. My problem is that I have been trying to get the startup and running configurations via both the CLI and the Menus but its become quite apparent that it isn't like the Cisco Switches/Routers. I've searched online but have only found Configuration Guides by Avaya. Also I'd like to know - is there a way to take backups regularly (something like tftp)? Pardon me but I'm a n00b when it comes to routers and switches. Thanks in advance.. EDIT: Still havent found a way to get the running config via the CLI

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• What are the challenges when my enterprise desires to move the processing component of an applicatio

  - by Berkay

  Assume that i have an enterprise accounting application that consists of a front-end interface, a processing tier, and a back-end database. This is an application that contains private business data, and thus is traditionally run in a secure private network environment within the enterprise. What are the challenges that appear when my enterprise desires to move the processing component of this application to a cloud computing data center in order to achieve greater scalability or to reduce IT costs ? Pls note: do i have to make significant changes to my own infrastructure to enable external access to formerly private resources? do i have to modify the application code to handle new network topology ? thanks, if you give your answers in a simple manner, really appreciated.

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• Hardware asset management systems

  - by Dave

  I need to track a bunch of specialized testing tools, They are hardware devices used for testing other equipement. Each device has a serial number and is sent out for use in testing. Occasionally they break and have to be sent to the manufacture for repair. I'm looking for an open source application (preferably a webapp) to help manage them. Right now we're using Excel and it's not scaling as we get more tools. They aren't computers so all the standard IT asset management systems don't really fit the bill. I found h-harmony, but that project seems dead?

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• Formatted USB flash drive with Disk Utility on Mac and now it is not recognized on any Mac or Windows machine

  - by Željko Filipin

  I have formatted Canyon CN-MP4A USB flash drive with Disk Utility on Mac and now it is not recognized on any Mac or Windows machine. I have formatted with Disk Utility > drive > Erease > Format > MS-DOS (FAT). Now when I plug it in any Mac or Windows machine, nothing happens. Like nothing is plugged in. It has a screen, and I was able to format it directly from the device before, but now when I turn it on, welcome screen appears, but nothing else. I can not get to the menu. Is there a way I can format it? I am looking for the answer on the internet, but no luck so far.

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• [Ubuntu] How can i log-in to Ubuntu using USB-serial console (rs232) ?

  - by marc

  Welcome, How can enable remote terminal login into Ubuntu 9.10 using usb-serial terminal ? I got created device ttyUSB0 and i want allow to log-in using hyper-terminal. I found some resources but they are related to real! hardware rs232 ports, i can't find any information about USB converter. Right now i have established connection between that usb-serial port and my laptop (i can send text writing to port cp sometext.txt /dev/ttyUSB0 and read using hyperterminal). Any idea ? Regards

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• background copy large files to a laptop?

  - by Roy Pardee

  Hey All, I like to watch windows media center recorded TV files on my laptop in bed. I find thought that when the programs are in HD I have a lot of stuttering and delays--no doubt b/c of the amount of data being transferred. I actually have a fair amount of space on the laptop's hdd, and wouldn't mind moving the files onto that hard drive, where no doubt my problem would go away. But that requires some planning & time for the files to move. Is there a utility out there that would kind of 'trickle' the files over to the laptop over a long period of time, w/out soaking its bandwidth? Something like ms' BITS tech? Both machines are running win7. Many thanks! -Roy

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• Ubuntu 12 Server messing up my hard disk

  - by Jeroen Jacobs

  I'm installing Ubuntu server on a disk with 12GB available. During the setup, I choose the default LVM-based partition layout. However for some reason, Ubuntu decides that it only wants to use 4GB of this disk. How do I reclaim the remaining space of the hard disk? "lvextent" doesn't work btw... output of df -h: Filesystem Size Used Avail Use% Mounted on /dev/mapper/ubuntu-root 4.3G 3.4G 754M 82% / udev 3.9G 4.0K 3.9G 1% /dev tmpfs 1.6G 756K 1.6G 1% /run none 5.0M 0 5.0M 0% /run/lock none 3.9G 0 3.9G 0% /run/shm /dev/sda1 228M 25M 192M 12% /boot output of pvdisplay: --- Physical volume --- PV Name /dev/sda5 VG Name ubuntu PV Size 12.32 GiB / not usable 2.00 MiB Allocatable yes PE Size 4.00 MiB Total PE 3154 Free PE 8 Allocated PE 3146 PV UUID dD06RZ-kGcL-1tTX-Ruds-XIDG-ssMd-FIUkzZ my partitions: Device Boot Start End Blocks Id System /dev/sda1 * 2048 499711 248832 83 Linux /dev/sda2 501758 26343423 12920833 5 Extended /dev/sda5 501760 26343423 12920832 8e Linux LVM when I try lvextent, it says there is not enough diskspace.

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• Amazon mount EBS

  - by William

  I'm trying to mount /vol to a EBS volume on an Amazon EC2 instance. I'm formatting the device to xfs, adding "/dev/sdh /vol xfs noatime 0 0" to my /etc/fstab file, making the /vol dir and mounting it and whenever I try to do anything with that volume (create a file in /vol, cd, ls, anything) or I try to run df the server just freezes. Anyone have any idea what this might be? It's driving me crazy. Edit: It seems to freeze after I mount, has nothing to do with doing any commands to the volume it's self.

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• virtual box cannot detect webcam in ubuntu

  - by user23950

  I have installed virtual box for ubuntu 9.10. I installed a windows xp inside it. And I don't know why it does not make the webcam available for the yahoo messenger installed in xp. When I click on the device in the interface of virtual box. I can see the webcam but it is grayed out. And I don't know why. It is also not available when I use wine to execute yahoo messenger. And I know that it is working because I can see its working when I use skype for ubuntu. Any suggestions?Its an acer aspire laptop, the webcam is built in.

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• How can I login to Ubuntu using a USB serial port?

  - by marc

  How can enable remote terminal login into Ubuntu 9.10 using a USB serial port? I created device /dev/ttyUSB0 and i want to allow logins using Hyper-Terminal. I found some resources but they are related to real hardware rs232 ports. I can't find any information about USB converter. So far I have established connection between that USB-serial port and my laptop. I can send text to the port (cp sometext.txt /dev/ttyUSB0) and read it using hyperterminal. What do I need to do to enable logins on this port?

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• PPP connection between PalmOS and Ubuntu (over ttyUSB0?) without crashy "visor" kernel module

  - by Chris Boyle

  I have a Palm Treo 680 which I'd like to use as a media remote, using Palm MPC. Almost the exact instructions on that page used to work perfectly for establishing a PPP connection over the USB cable; I think I last tried it in Ubuntu 9.04 (Jaunty). In Karmic, I find that /dev/ttyUSB{0,1} are not present by default, and when I modprobe visor to get them, the Palm immediately crashes and reboots, as seen in Ubuntu bug 522753 (it reboots again as long as the module is still loaded and USB is still connected). The usbserial module has the same result. From reading that bug and elsewhere, it appears that the visor module is abandoned, and jpilot and friends use some other approach to talk to PalmOS over USB these days, which might not even involve a ttyUSB device. My question is, therefore: How do I create a PPP connection between PalmOS and Karmic without crashing the Palm?

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