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• ./rtnet start rteth0-mac: unknown interface: No such device ioctl: No such device

  - by Anisha Kaul

  I have installed the RTnet over Xenomai. RTnet compiled well, and I also tested loopback on the single machine and was able to ping. However I noticed ./rtnet start showing the following output: What should I interpret when all it says is "no such device"? What more info should I provide here for you to help me in getting rid of this error? linux-y3pi:/usr/local/rtnet/sbin # ./rtnet start rteth0: unknown interface: No such device rteth0-mac: unknown interface: No such device ioctl: No such device ioctl: No such device ioctl: No such device ioctl: No such device ioctl (add): No such device vnic0: unknown interface: No such device SIOCSIFADDR: No such device vnic0: unknown interface: No such device SIOCSIFNETMASK: No such device Waiting for all slaves...ioctl: No such device ioctl: No such device linux-y3pi:/usr/local/rtnet/sbin # lsmod: linux-y3pi:/usr/local/rtnet/sbin # lsmod Module Size Used by tdma 18281 0 rtmac 9274 1 tdma rtcfg 49485 0 rtcap 7216 0 rt_loopback 1563 2 rtpacket 5517 0 rtudp 10655 0 rt_8139too 11374 0 rtipv4 22842 2 rtcfg,rtudp rtnet 42130 9 tdma,rtmac,rtcfg,rtcap,rt_loopback,rtpacket,rtudp,rt_8139too,rtipv4 ip6t_LOG 8480 6 xt_tcpudp 3540 2 xt_pkttype 1176 3 ipt_LOG 8201 6 xt_limit 2159 12 snd_pcm_oss 44878 0 snd_mixer_oss 15151 1 snd_pcm_oss snd_seq 55731 0 s nd_seq_device 6698 1 snd_seq edd 8407 0 ip6t_REJECT 4306 3 nf_conntrack_ipv6 8186 4 nf_defrag_ipv6 10128 1 nf_conntrack_ipv6 ip6table_raw 1451 1 xt_NOTRACK 1112 4 ipt_REJECT 2397 3 xt_state 1314 8 iptable_raw 1478 1 iptable_filter 1706 1 ip6table_mangle 1756 0 nf_conntrack_netbios_ns 1678 0 nf_conntrack_ipv4 8957 4 nf_conntrack 80411 5 nf_conntrack_ipv6,xt_NOTRACK,xt_state,nf_conntrack_netbios_ns,nf_conntrack_ipv4 nf_defrag_ipv4 1561 1 nf_conntrack_ipv4 ip_tables 18872 2 iptable_raw,iptable_filter ip6table_filter 1679 1 ip6_tables 19066 4 ip6t_LOG,ip6table_raw,ip6table_mangle,ip6table_filter x_tables 24094 16 ip6t_LOG,xt_tcpudp,xt_pkttype,ipt_LOG,xt_limit,ip6t_REJECT,ip6table_raw,xt_NOTRACK,ipt_REJECT,xt_state,iptable_raw,iptable_filter,ip6table_mangle,ip_tables,ip6table_filter,ip6_tables fuse 69279 3 loop 17417 0 dm_mod 71671 0 snd_hda_codec_via 57768 1 snd_hda_intel 24871 2 snd_hda_codec 95006 2 snd_hda_codec_via,snd_hda_intel snd_hwdep 6540 1 snd_hda_codec snd_pcm 90716 3 snd_pcm_oss,snd_hda_intel,snd_hda_codec snd_timer 22050 2 snd_seq,snd_pcm snd 71410 14 snd_pcm_oss,snd_mixer_oss,snd_seq,snd_seq_device,snd_hda_codec_via,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_timer soundcore 7854 1 snd iTCO_wdt 11716 0 iTCO_vendor_support 2942 1 iTCO_wdt snd_page_alloc 8324 2 snd_hda_intel,snd_pcm sr_mod 13186 0 cdrom 37628 1 sr_mod i2c_i801 9677 0 pcspkr 1950 0 sg 28847 0 serio_raw 4534 0 ext4 361361 2 jbd2 82943 1 ext4 crc16 1699 1 ext4 i915 500199 2 drm_kms_helper 33537 1 i915 drm 211193 3 i915,drm_kms_helper sd_mod 33977 5 i2c_algo_bit 5625 1 i915 intel_agp 11529 1 i915 intel_gtt 16397 3 i915,intel_agp ata_generic 3787 0 ata_piix 22875 4 ahci 20097 0 libahci 22089 1 ahci libata 194812 4 ata_generic,ata_piix,ahci,libahci scsi_mod 204709 4 sr_mod,sg,sd_mod,libata linux-y3pi:/usr/local/rtnet/sbin #

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• How to achieve zero down time

  - by Hiral Lakdavala

  For an application we want to achieve zero database and application down time using Active Active configuration. Our dB is Oracle Following are my questions: How can we achieve active active configuration in Oracle? Will introducing Cassandra/HBase(or any other No SQL dbs) cloud help in zero downtime or it is only for fast retrieval of data in a large db? Any other options? Thanks and Regards, Hiral

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• ManicTime Alternative for Mac OS X

  - by Calcgod

  Is there software like ManicTime for Windows that can track of everything I do in Mac OS X?

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• Why Does Wireless Gear Degrade Over Time?

  - by bahamat

  I saw this originally posted on slashdot, but their comment format is not conducive to actually getting a correct answer. Having directly experienced this phenomenon myself, I'm now asking here where I think I can actually get an educated answer. Here's the original question verbatim: Lately I have replaced several home wireless routers because the signal strength has been found to be degraded. These devices, when new (2+ years ago) would cover an entire house. Over the years, the strength seems to decrease to a point where it might only cover one or two rooms. Of the three that I have replaced for friends, I have not found a common brand, age, etc. It just seems that after time, the signal strength decreases. I know that routers are cheap and easy to replace but I'm curious what actually causes this. I would have assumed that the components would either work or not work; we would either have a full signal or have no signal. I am not an electrical engineer and I can't find the answer online so I'm reaching out to you. Can someone explain how a transmitter can slowly go bad? Common (incorrect, but repeated) answers from slashdot include: Back then your neighbors didn't have wifi, now they do. They drowning you out. I don't think this is likely because replacing the access point with a new one and using the same frequencies solves the problem. Older devices had low transmit power. Crank that baby. As mentioned by a FreeBSD wireless developer this violates regulations and can physically damage the equipment. It was also mentioned that higher power in one direction is not necessarily reciprocated. This shows higher bars, but not necessarily a better connection. Manufacturers make cheap crap designed to wear out. This one actually may be legitimate although it is overly broad. What specifically causes damage over time? Heat? Excessive power? So can anyone provide an informed answer on this? Is there any way to fix these older access points?

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• Adeos's role w.r.t Linux

  - by Anisha Kaul

  The event pipeline The fundamental Adeos structure one must keep in mind is the chain of client domains asking for event control. A domain is a kernelbased software component which can ask the Adeos layer to be notified of: · Every incoming external interrupt, or autogenerated virtual interrupt; · Every system call issued by Linux applications, · Other system events triggered by the kernel code (e.g. Linux task switching, signal notification, Linux task exits etc.). From: Life with Adeos: http://www.xenomai.org/documentation/xenomai-2.4/pdf/Life-with-Adeos-rev-B.pdf Question: Adeos is supposed to be between the hardware and the Linux kernel, I can understand about Adeos telling the Linux about hardware interrupts but Why should Adeos know about the "system call" issued by Linux?

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• how to create real-time echo while singing on PC

  - by anto8421

  Does anyone know how i can create echo in real-time while singing on PC. Lets i want to sing to audience over IM and i want an echo/delay effect while i sing. Is there any software available?

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• Excel 2007 - How can I write "use this cell" or IF BLANK "use this cell"?

  - by Mike

  I am trying to show the Days between NOW() and the dates (dd/mm/yy) in, either Column B or Column C - depending which one is NOT blank A B C 29/03/10 01/04/10 29/03/10 02/04/10 29/03/10 30/04/10 29/03/10 31/03/10 29/03/10 03/04/10 I currently have the formaul below and then drag it down, but it obviously means I need to go back and amend the 'errors'. =DAYS360(A1,B1) I always forget how to nest this type of NULL/BLANK thing so any help, or pointers to remember would be appreciated. Thanks Mike

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• Disabling Windows 7 UAC on an older legacy program (pops up every time I start it)

  - by Daisetsu

  Every time I run this legacy program I get the UAC popping up. It's really anoying, is there a way to disable it just for this one program rather than my whole system? I need the UAC to be active for most programs because I do development and testing on this system.

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• Improving Manageability of Virtual Environments

  - by Jeff Victor

  Boot Environments for Solaris 10 Branded Zones Until recently, Solaris 10 Branded Zones on Solaris 11 suffered one notable regression: Live Upgrade did not work. The individual packaging and patching tools work correctly, but the ability to upgrade Solaris while the production workload continued running did not exist. A recent Solaris 11 SRU (Solaris 11.1 SRU 6.4) restored most of that functionality, although with a slightly different concept, different commands, and without all of the feature details. This new method gives you the ability to create and manage multiple boot environments (BEs) for a Solaris 10 Branded Zone, and modify the active or any inactive BE, and to do so while the production workload continues to run. Background In case you are new to Solaris: Solaris includes a set of features that enables you to create a bootable Solaris image, called a Boot Environment (BE). This newly created image can be modified while the original BE is still running your workload(s). There are many benefits, including improved uptime and the ability to reboot into (or downgrade to) an older BE if a newer one has a problem. In Solaris 10 this set of features was named Live Upgrade. Solaris 11 applies the same basic concepts to the new packaging system (IPS) but there isn't a specific name for the feature set. The features are simply part of IPS. Solaris 11 Boot Environments are not discussed in this blog entry. Although a Solaris 10 system can have multiple BEs, until recently a Solaris 10 Branded Zone (BZ) in a Solaris 11 system did not have this ability. This limitation was addressed recently, and that enhancement is the subject of this blog entry. This new implementation uses two concepts. The first is the use of a ZFS clone for each BE. This makes it very easy to create a BE, or many BEs. This is a distinct advantage over the Live Upgrade feature set in Solaris 10, which had a practical limitation of two BEs on a system, when using UFS. The second new concept is a very simple mechanism to indicate the BE that should be booted: a ZFS property. The new ZFS property is named com.oracle.zones.solaris10:activebe (isn't that creative? ). It's important to note that the property is inherited from the original BE's file system to any BEs you create. In other words, all BEs in one zone have the same value for that property. When the (Solaris 11) global zone boots the Solaris 10 BZ, it boots the BE that has the name that is stored in the activebe property. Here is a quick summary of the actions you can use to manage these BEs: To create a BE: Create a ZFS clone of the zone's root dataset To activate a BE: Set the ZFS property of the root dataset to indicate the BE To add a package or patch to an inactive BE: Mount the inactive BE Add packages or patches to it Unmount the inactive BE To list the available BEs: Use the "zfs list" command. To destroy a BE: Use the "zfs destroy" command. Preparation Before you can use the new features, you will need a Solaris 10 BZ on a Solaris 11 system. You can use these three steps - on a real Solaris 11.1 server or in a VirtualBox guest running Solaris 11.1 - to create a Solaris 10 BZ. The Solaris 11.1 environment must be at SRU 6.4 or newer. Create a flash archive on the Solaris 10 system s10# flarcreate -n s10-system /net/zones/archives/s10-system.flar Configure the Solaris 10 BZ on the Solaris 11 system s11# zonecfg -z s10z Use 'create' to begin configuring a new zone. zonecfg:s10z create -t SYSsolaris10 zonecfg:s10z set zonepath=/zones/s10z zonecfg:s10z exit s11# zoneadm list -cv ID NAME STATUS PATH BRAND IP 0 global running / solaris shared - s10z configured /zones/s10z solaris10 excl Install the zone from the flash archive s11# zoneadm -z s10z install -a /net/zones/archives/s10-system.flar -p You can find more information about the migration of Solaris 10 environments to Solaris 10 Branded Zones in the documentation. The rest of this blog entry demonstrates the commands you can use to accomplish the aforementioned actions related to BEs. New features in action Note that the demonstration of the commands occurs in the Solaris 10 BZ, as indicated by the shell prompt "s10z# ". Many of these commands can be performed in the global zone instead, if you prefer. If you perform them in the global zone, you must change the ZFS file system names. Create The only complicated action is the creation of a BE. In the Solaris 10 BZ, create a new "boot environment" - a ZFS clone. You can assign any name to the final portion of the clone's name, as long as it meets the requirements for a ZFS file system name. s10z# zfs snapshot rpool/ROOT/zbe-0@snap s10z# zfs clone -o mountpoint=/ -o canmount=noauto rpool/ROOT/zbe-0@snap rpool/ROOT/newBE cannot mount 'rpool/ROOT/newBE' on '/': directory is not empty filesystem successfully created, but not mounted You can safely ignore that message: we already know that / is not empty! We have merely told ZFS that the default mountpoint for the clone is the root directory. List the available BEs and active BE Because each BE is represented by a clone of the rpool/ROOT dataset, listing the BEs is as simple as listing the clones. s10z# zfs list -r rpool/ROOT NAME USED AVAIL REFER MOUNTPOINT rpool/ROOT 3.55G 42.9G 31K legacy rpool/ROOT/zbe-0 1K 42.9G 3.55G / rpool/ROOT/newBE 3.55G 42.9G 3.55G / The output shows that two BEs exist. Their names are "zbe-0" and "newBE". You can tell Solaris that one particular BE should be used when the zone next boots by using a ZFS property. Its name is com.oracle.zones.solaris10:activebe. The value of that property is the name of the clone that contains the BE that should be booted. s10z# zfs get com.oracle.zones.solaris10:activebe rpool/ROOT NAME PROPERTY VALUE SOURCE rpool/ROOT com.oracle.zones.solaris10:activebe zbe-0 local Change the active BE When you want to change the BE that will be booted next time, you can just change the activebe property on the rpool/ROOT dataset. s10z# zfs get com.oracle.zones.solaris10:activebe rpool/ROOT NAME PROPERTY VALUE SOURCE rpool/ROOT com.oracle.zones.solaris10:activebe zbe-0 local s10z# zfs set com.oracle.zones.solaris10:activebe=newBE rpool/ROOT s10z# zfs get com.oracle.zones.solaris10:activebe rpool/ROOT NAME PROPERTY VALUE SOURCE rpool/ROOT com.oracle.zones.solaris10:activebe newBE local s10z# shutdown -y -g0 -i6 After the zone has rebooted: s10z# zfs get com.oracle.zones.solaris10:activebe rpool/ROOT rpool/ROOT com.oracle.zones.solaris10:activebe newBE local s10z# zfs mount rpool/ROOT/newBE / rpool/export /export rpool/export/home /export/home rpool /rpool Mount the original BE to see that it's still there. s10z# zfs mount -o mountpoint=/mnt rpool/ROOT/zbe-0 s10z# ls /mnt Desktop export platform Documents export.backup.20130607T214951Z proc S10Flar home rpool TT_DB kernel sbin bin lib system boot lost+found tmp cdrom mnt usr dev net var etc opt Patch an inactive BE At this point, you can modify the original BE. If you would prefer to modify the new BE, you can restore the original value to the activebe property and reboot, and then mount the new BE to /mnt (or another empty directory) and modify it. Let's mount the original BE so we can modify it. (The first command is only needed if you haven't already mounted that BE.) s10z# zfs mount -o mountpoint=/mnt rpool/ROOT/zbe-0 s10z# patchadd -R /mnt -M /var/sadm/spool 104945-02 Note that the typical usage will be: Create a BE Mount the new (inactive) BE Use the package and patch tools to update the new BE Unmount the new BE Reboot Delete an inactive BE ZFS clones are children of their parent file systems. In order to destroy the parent, you must first "promote" the child. This reverses the parent-child relationship. (For more information on this, see the documentation.) The original rpool/ROOT file system is the parent of the clones that you create as BEs. In order to destroy an earlier BE that is that parent of other BEs, you must first promote one of the child BEs to be the ZFS parent. Only then can you destroy the original BE. Fortunately, this is easier to do than to explain: s10z# zfs promote rpool/ROOT/newBE s10z# zfs destroy rpool/ROOT/zbe-0 s10z# zfs list -r rpool/ROOT NAME USED AVAIL REFER MOUNTPOINT rpool/ROOT 3.56G 269G 31K legacy rpool/ROOT/newBE 3.56G 269G 3.55G / Documentation This feature is so new, it is not yet described in the Solaris 11 documentation. However, MOS note 1558773.1 offers some details. Conclusion With this new feature, you can add and patch packages to boot environments of a Solaris 10 Branded Zone. This ability improves the manageability of these zones, and makes their use more practical. It also means that you can use the existing P2V tools with earlier Solaris 10 updates, and modify the environments after they become Solaris 10 Branded Zones.

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• "Must have" "Launcher" applications?

  - by levi rosol

  What applications do you use for quickly launching applications, websites, folder paths, etc? Post one application per response, and include a URL.

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• Java run time environment mac

  - by Gatura

  I am trying to install an application on a MAC 10.6.4, however i get an installation error that no java runtime environment. However on the java website, the mac section indicates that MAC provides its own java and should use the software update software to get the latest java application. I have done this and gotten the latest java however I still get the same error no java run time is there something am missing?

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• Automatically close program at a scheduled time each day

  - by user8407

  Is there a way to automagically determine if a program is running and close it at scheduled time, say 3 am every day? Maybe use task scheduler to close said application? if this is possible any direction would be appreciated. Vista or Win7

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• DHCP Lease time

  - by DanSpd

  Hello, I have computer connected to internet directly. But once very hour IP changes and I do not want that for sure. How can I set IP lease time for like a year or so? Thank you

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• dell laptop's screen goes to screen saver after a very short time

  - by homestead

  Not sure why, but recently my dell laptop (inspiron 1720) screen goes black after a very short time of unuuse. e.g. if I am watching a video, the screen goes all black, I have to move the mouse cursor to get it back. what could be the issue?

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• VPN/AFP server for centralized TimeMachine backups

  - by Keith Johnson

  I am a sysadmin for a small group of about 7 people who prefer Apple machines for their work. These machines are currently either a) not backed up at all, or b) backed up using Retrospect(Which I'm not very fond of). I don't really have the budget for anything fancy, and I'd like to keep it as user friendly as possible. Ideally I am thinking of a VPN server they can connect to(to keep the traffic secure, and because they work from home frequently) along with an AFP server for use with TimeMachine. The goal would be to get better backup coverage, along with user-initiated restores and overall ease of use. Does this seem like a reasonable idea? Has anyone done this before? Are there any obvious problems I've overlooked?

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• DIG Command = What Parameters are required to retrieve the zone file version?

  - by jens

  Hello, What Parameters are required to retrieve the zone file version, when using the linux "dig" command (of any of the "Root DNS" servers/zonefiles like versign etc...)? Thanks jens

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• single level paging memory manager ...time it takes to access the memory

  - by Avon

  If I have a system with a single level paging memory manager ( without TLB).. How much time is needed for this system to access the memory ? I've been reading twice as long without the memory manager .. Is this true ? If not how long without a memory manager ( give or take ) would it be.

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• Acrobat Reader 9 Crashes Every Time

  - by Jess Sightler

  I have an XP machine on which Adobe Acrobat Reader crashes every time as soon as it starts. I've tried reinstalling 9 and it doesn't help at all. If I use it to open a PDF, it displays the first page, and can be scrolled for about 3 seconds before it crashes. Is there some way to debug this?

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• Real-time sound levelling applications for OS X?

  - by Phillip Oldham

  Are there any real-time sound levelling applications for OS X? Something that can even-out the loud and quiet scenes of movies so that I don't have to keep reaching for the remote? I don't want to re-encode or permanently change any video/audio files, however.

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• Nedd a Linux command that takes much time

  - by user19455

  Don't ask why, but I would like to know a linux command, besides "la -laR", since that could not take that long according to where you are in the folder structure, that takes much time to complete. Thanks for your help.

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• How to estimate laptop sleeping time on battery ?

  - by ldigas

  In simple terms, if battery time is approximately known, how can one estimate how long a laptop can "hold on" in sleep mode, before battery goes dead ? Apart from literally taking a watch and measuring it ?

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• Factors affecting internet response time in online gaming

  - by cornjuliox

  I frequently play games like Urban Terror and True Combat Elite, and I was wondering what factors come into play when calculating response time? Is it simply the distance between you and the server? Or does bandwidth fit in here somehow?

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• How to make TimeMachine back up contents of any path or mounted volume

  - by Olfan

  I keep different types of data in different encrypted sparsebundle images (say, one for each client) which automatically mount upon login but can't be opened by anybody other than myself. So, after login I have a number of virtual volumes in /Volumes/ which keeps my client data both secure and organized. How do I include data inside these virtual Volumes in TimeMachine's backups, or data residing in any path on any partition/volume? I found a promising solution description at blog.eurocomp.info involving editing the com.apple.TimeMachine.plist but all I can get TimeMachine to do is backing up the sparsebundle files themselves. I want it to back up the files inside the mounted image, though - something like adding /Volumes/Client_abc/ to TimeMachine's search path. Please do not redirect my to this previous question as it doesn't solve the problem at all. Please also refrain from telling me why you think I should not want this answer as that will not solve anything either. Please lastly don't say "it can't be done" unless you can technically prove that claim.

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• Burn the CD or DVD for one time use

  - by kumar

  I want to burn the CD or DVD for one-time use, that is - CD or DVD copy protection, like CD to CD or CD to hard disc copy protection. The CD has a setup. After setup process is finished the setup file will destroy automatically or disable the CD contents. How to create like this. Please give me some ideas

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• Spreadsheet functions to query route planner for travel time/distance

  - by Rich

  I would like to achieve something whereby I have a spreadsheet such that the columns are: Column A - place name Column B - place name Column C - distance by road between places in columns A and B Column D - travel time by road between places in columns A and B I thought it might be possible using Google Docs' spreadsheet and its 'Google' functions, but I've not found any that might do the trick. In the end I could knock up an app to do it using the Google Maps API but would rather avoid it if I can.

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