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• Are speakers wasting power when they are not in use?

  - by Dennis Cheung

  I guess all of you have a pair/set of speakers for your MP3s. I am just interesting to how do they do when they are not playing? How actually the power spent by the speaker? Does any the below cases matter? Idle / Silence input When you computer is off / not connected Raise the volume by hardware (turn/push the button on the speaker) Raise the volume by software (do it with your mouse) BTW, to save the world. I am here to suggest you to unplug it when you leave your PC.

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• Go frame-by-frame through a movie with a precise timer

  - by Matchu

  Hello, world: I have a video I made for physics class, which I intend to use to measure just how long an event took to take place. I can find the start frame and end frame easily using VLC's frame-by-frame feature. However, VLC's timer seems only to be precise to a single second, giving me no more precise an answer than "5 seconds." Is there a way in VLC, or any other program, to identify at precisely what time a particular frame in a video takes place? I have easy access to Ubuntu and Windows, and acquire a Mac if need be. If precise timer is not available, what number frame I am on will also work, since I know the framerate.

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• Throughput = BS * IOPS?

  - by Marvin

  I've seen in many places that throughput = bs * iops should be true. For example writing at 128k block size to a SAS disk that can support 190 IOPS should give a throughput of ~23 MBps - 23.75(MBs) = 128(BS)*190(SAS-15 IOPS)/1024. Now when I tested it in a VM against a monster NetApp filer I got theses results: # dd if=/dev/zero of=/tmp/dd.out bs=4k count=2097152 8589934592 bytes (8.6 GB) copied, 61.5996 seconds, 139 MB/s To view the IO rate of the VM I used iostat and esxtop, and they both showed around 250 IOPS. So to my understanding the throughput was supposed to be ~1000k: 1000(KBs) = 4(BS)*250(IOPS). dd of 8GB is twice the size of RAM of course, so no page caching here. What am I missing? Thanks!

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• Firewalling gateways and IDS's

  - by Scott Davies

  Hi, For IDS, I plan to have a Win 2008 server running on the gateway with the majority of roles disabled. I plan to firewall the Internet connection, but I'd also like to install Snort to work as an IDS. However, I am guessing that regardless of the Snort install of the promiscuous Winpcap driver, I won't be able to monitor ports that the firewall blocks. My thinking is that chain of flow is: Internet-Firewall on Win 2008-Winpcap-Snort-internal network Is there a way to still monitor services that the firewall will block (i.e. TCP 445 SMB) ? Perhaps run the data through Snort and then through the firewall ? Thanks

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• Port forwarding for VNC on Dynalink RTA1335 not working

  - by Curyous

  I've vnc-java running on an Ubuntu box, with the IP address 192.168.1.68, using port 5800 (because port 5900 is being used for normal VNC). If I connect to 192.168.1.68:5800 using another computer on the network, I can use VNC fine. Using www.whatismyip.com, I find out what my IP address from the outside world is, and if I go directly to that, I get to access my modem/router. If I try to navigate to that IP address, with ':5800' on the end, I get a "This web page is not available." error. I have port forwarding set up in the router as follows: Application Name External Packet Internal Host IP Address Protocol Port IP Address Port VNC ALL TCP/UDP 5800 192.168.1.68 5800 What else do I need to do to get this to work?

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• Help with running crontab from root

  - by user242065

  Im using OSX and having trouble getting a cron job to run. I type the following: $ sudo -i $ crontab -e I then enter: * * * * * root ifconfig en0 down > /dev/null 0 19 * * * root ifconfig en0 down > /dev/null 0 7 * * * root ifconfig en0 up > /dev/null and no success, the first line is for testing. I want it to shut off my internet. The next two lines I plan to leave in, once I get this working. If I type this in to the terminal the internet goes off ifconfig en0 down Why is my cron job not shutting down the internet? FYI: This is a follow up question from http://stackoverflow.com/questions/3027362/how-can-i-write-a-cron-job-that-will-block-my-internet-from-7pm-to-7am-so-i-can most of the comments there are people making fun of me. And a few attempts to solve the problem with out cron jobs.

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• Recommended website performance monitoring services? [closed]

  - by Dennis G.

  I'm looking for a good performance monitoring service for websites. I know about some of the available general monitoring services that check for uptime and notify you about unavailable services. But I'm specifically looking for a service with an emphasis on performance. I.e., I would like to see reports with detailed performance statistics from multiple locations world-wide, with a break-down on how long it took to fetch the different website resources, including third-party scripts such as Google Analytics and so on (the report should contain similar details such as the FireBug Net tab). Are there any such services and if so, which one is the best?

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• How would I / could I obtain an reasonably comprehensive list of domain names?

  - by Simon

  I know that domain names are constantly changing, and I know there are a lot of them, but there is clearly a region of the domain name space which is stable. How would I go about getting a list, even a very big one? Such a thing must logically exist, even if it is in a distributed form, because the web's DNS servers resolve names to IP addresses. So in theory if I could poll all the DNS servers in the world at a moment in time I would have the complete list of mapped names. Is there a practical way of doing that? As an aside, does anyone have any good estimates of how many domain names exist at the moment?

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• Max ping response time?

  - by DougN

  I'm wondering what a maximum (practical) ping response time might be. As far as I know, there isn't a max defined anywhere (TTL, but that's hops, not time). As I think about it, I'm not sure I've ever seen a ping response time of more than a second or so. But as far as I know, there is nothing to stop a remote host from waiting (or being really busy) and not sending the response back for a few seconds. As a simple data point, I just pinged a number of servers around the world and the worst time I could find was 350ms.

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• X-ming, Ubuntu apps - getting the Ubuntu style/theme to load

  - by user5402

  I am running X-ming on Windows 7 and using putty to ssh into an Ubuntu system. On the Ubuntu system I use the command: $ gnome-terminal & to display a terminal back on the Windows box. When I do this I don't get the standard Ubuntu style, i.e. dark purple background, Mono font, solid cursor (which I've configured in the Gnome Control Center.) Instead I get a very plain style - white background, blinking cursor, very small font. However, if I run gnome-control-center and then click on, say, the Keyboard icon, the terminal window will be reconfigured with the Ubuntu style with my customizations (e.g. block cursor vs. blinking cursor.) Just starting one of the control applets seems to trigger this style change. My question is: How can I trigger this style change more directly - without having to launch the Gnome Control center and launching one of the configuration applets?

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• How do I get Dreamweaver to deploy syntax highlighting for full script CFC's?

  - by Mel

  Is there a way to get Dreamweaver CS4 to use syntax highlighting when writing full script CFCs? If the document type is .cfc and they syntax is fullscript, there is no syntax highlighting; the code will be in black text... For example, the following block of code will appear without syntax highlighting: component extends="whatever" output="false" { public void foo() { } } While the tag equivalent would be highlighted normally: <cfcomponent extends="whatever" output="false"> <cffunction name="foo" returnType="void" access="public"> </cffunction> </cfcomponent>

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• Set default expand/colapse state on pivot tables

  - by CLockeWork

  The Setup I have a pivot table in tabular form pulling data from an Analysis Services Cube. I want to calculate the number of days between two dates, but the setup will only allow me to pull in all date elements, not just the date. I’ve been able to deal with this easily enough by just grouping all the columns: The Problem The default state for the expand/collapse buttons in the image above is often collapsed, but that means the dates I need aren’t there and you have to open the group and manually expand them. This also happens in some random ways (as shown in the image) where only some rows expand. The Question I need a way to set these sections to always be expanded, so that the user never has to open the group to expand the rows. Ideally I’d like to avoid VBA because our end users often block it, but if that’s what’s needed then so be it. Is there a way to set my pivot table to never collapse it’s predefined groups? Note the end user is using Excel 2010

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• Reduce Windows DNS Service caching on Window

  - by Nick G

  I'm struggling with DNS caching issues on a Windows based LAN. I've noticed that if I change a DNS record on a domain hosted by a 3rd party nameserver, that I always seem to be the very last person to see the change happen. I can often query the domain using a service which checks propagation around the world like www.whatsmydns.net but I usually find that all other DNS servers are correct and it's only my own server which has the old IP - even 8-12 hours later. This is an issue for us as we're website developers and often making changes to DNS records so these huge delays are frustrating. It seems to be because our primary domain controller server (+Active Directory & DNS) on our LAN (which is also our local DNS server) caches records for AGES (Way beyond it's published TTL). How can I stop the Windows DNS server from caching, or reduce the caching to only an hour or so?

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• Converting date format in formulas in Excel

  - by Casebash

  I have a column of dates in the following format ddd mmm dd hh m:s "EST" yyyy. In another cell in another sheet, I wish to have the dates in the format dd/m/y. How can I do this? I already tried the DATEVALUE function. Seeing as the positions are fixed, I started using the RIGHT and MID functions to extract components to put into the DATE function. Unfortunately, I don't know of a way of converting the three letter string to a month without writing a huge if block. UPDATE: I managed to convert the string using MONTH(1&THREE_LETTER_DATE). I am still curious if there is a better solution though

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• Proxmox 31 + KVM routing + IP subnet + csf

  - by KeyJey

  We have proxmox 3.1 server in netzner with routuing network and IP subnet block. We want to implement csf firewall without interfering the traffic of the KVM VMs, what would be the easiest way? We readed that we should add this lines to /etc/csf/csfpost.sh: iptables -A FORWARD -d 144.76.223.155 -j ACCEPT iptables -A FORWARD -d 144.76.223.156 -j ACCEPT iptables -A FORWARD -d 144.76.223.157 -j ACCEPT iptables -A FORWARD -d 144.76.223.158 -j ACCEPT iptables -A FORWARD -d 144.76.223.159 -j ACCEPT iptables -A FORWARD -d 144.99.183.323 -j ACCEPT But when we enable csf the ping breaks, this is the network config (IPs are modified): auto lo iface lo inet loopback # device: eth0 auto eth0 iface eth0 inet static address 144.76.166.100 netmask 255.255.255.255 pointopoint 144.76.183.97 gateway 144.76.183.97 # for single IPs auto vmbr0 iface vmbr0 inet static address 144.76.166.100 netmask 255.255.255.255 bridge_ports none bridge_stp off bridge_fd 0 up ip route add 144.99.183.323/32 dev vmbr0 # for a subnet auto vmbr1 iface vmbr1 inet static address 144.76.166.100 netmask 255.255.255.248 bridge_ports none bridge_stp off bridge_fd 0 Thanks in advanced ! :)

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• reiserfsck --rebuild-tree failed: Not enough allocable blocks

  - by mojo

  I have a reiserfs volume that required a --rebuild-tree, but is currently failing to complete when I pass it --rebuild-tree. Here is the output that I receive when running it: reiserfsck 3.6.19 (2003 www.namesys.com) # reiserfsck --rebuild-tree started at Mon Oct 26 13:22:16 2009 # Pass 0: # Pass 0 The whole partition (7864320 blocks) is to be scanned Skipping 8450 blocks (super block, journal, bitmaps) 7855870 blocks will be read 0%....20%....40%....60%....80%....100% left 0, 9408 /sec 287884 directory entries were hashed with "r5" hash. "r5" hash is selected Flushing..finished Read blocks (but not data blocks) 7855870 Leaves among those 6105606 Objectids found 287892 Pass 1 (will try to insert 6105606 leaves): # Pass 1 Looking for allocable blocks .. finished 0%....20%....40%....60%....80%....Not enough allocable blocks, checking bitmap...there are 1 allocable blocks, btw out of disk space Aborted I can't mount it, and I can't fsck it. I've tried extending the volume, but that hasn't helped either.

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• Setting the Timezone with an automated script

  - by Tom

  I'm writing scripts to automate setting up new slicehost installations. In a perfect world, after I started the script, it would just run, with no attention from me. I have succeeded, with one exception. How do I set the timezone, in a permanent (survive reboot) and sane (adjust for standard and daylight savings time, so no just forcing the date) ... manner that doesn't require input from me? Currently, I'm using dpkg-reconfigure tzdata This doesn't seem to have any way to force parameters into it. It demands user input. EDIT: I'm editing here, rather than commenting, since comments don't seem to allow code blocks. Here's the actual code I ended up with, based on Rudedog's comment below. I also noticed that this doesn't update /etc/timezone. I'm not certain who uses that, but in case anybody does, I'm setting that too. TIMEZONE="America/Los_Angeles" echo $TIMEZONE > /etc/timezone cp /usr/share/zoneinfo/${TIMEZONE} /etc/localtime # This sets the time

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• Applocker custom extension (Java, CPL, MSC etc.)

  - by test1839

  We have a Terminal server and want to prevent users from running inappropriate software. Previously we used Software Restriction Policies for this purpose. Now, Microsoft seems to recommend Applocker instead. However we found no possibilities to add custom extensions like JAR, CPL, MSC etc. which was possible in Software Restriction Policies. Do you know how to add custom extensions to the Applocker policies in Windows 2008? Or how can we block custom script interpreters like Perl etc.?

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• Two timer applets in notification area

  - by 1passenger

  Hi, after installig Ubuntu 10.04 Remix I can see two timer applets in the notification area. When I click on the first one, I can see the current date and the menues "Open Calendar", "Set Time and Date". When I click on the second one, I can see a small calendar of the current month and a small world map with my defined locations. I just want to have only one timer to safe some space in the notification area. How to disable one of the two applets? To click "Remove from Panel" isn't possible in the Remix edition!

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• Can't launch Oneiric x64 instance on Eucalyptus

  - by Bruno Reis

  EDIT: after many hours, I've found out that the problem has nothing to do with Eucalyptus. It looks like the image is buggy. Very, very buggy. More details in the end. I didn't manage to fix it, and I will file a bug. EDIT 2: I managed to fix it, it apparently works. I have a 4-machine cluster running Ubuntu Server Natty (11.04) x64. I've installed "Ubuntu Enterprise Cloud" from the installtion CD (then updated it) on each of these machines. The cloud seems to work fine, I have lots of virtual machines running Natty servers on them. Now I'd like to run Oneiric in a virtual machine, but somehow I can't. I downloaded Oneiric's (x64) image from http://cloud-images.ubuntu.com/oneiric/current/, published it (uec-publish-tarball oneiric-server-cloudimg-amd64.tar.gz oneiric-server-cloudimg-amd64) exactly as I did with Natty, then tried to launch an instance (euca-run-instances -n 1 -k my-key -t m1.small -z my-cloud emi-XXXXXXXX) using Oneiric's image, but the instance is not able to boot. With euca-get-console-output I get the following: [ 0.461269] VFS: Cannot open root device "sda1" or unknown-block(0,0) [ 0.462388] Please append a correct "root=" boot option; here are the available partitions: [ 0.463855] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) [ 0.465331] Pid: 1, comm: swapper Not tainted 3.0.0-13-generic #22-Ubuntu [ 0.466526] Call Trace: [ 0.466989] [<ffffffff815d3ee5>] panic+0x91/0x194 [ 0.467860] [<ffffffff81ad1031>] mount_block_root+0xdc/0x18e [ 0.468891] [<ffffffff81ad126a>] mount_root+0x54/0x59 [ 0.469829] [<ffffffff81ad13dc>] prepare_namespace+0x16d/0x1a7 [ 0.470883] [<ffffffff81ad0d76>] kernel_init+0x140/0x145 [ 0.471837] [<ffffffff815f38e4>] kernel_thread_helper+0x4/0x10 [ 0.472889] [<ffffffff81ad0c36>] ? start_kernel+0x3df/0x3df [ 0.473884] [<ffffffff815f38e0>] ? gs_change+0x13/0x13 The filesystem is labeled "cloudimg-rootfs", inside the image both /etc/fstab and /boot/grub/grub.cfg always refer to the image by the label, everything seems to be correct, yet the kernel says it can't find the root file system. I've spent many hours googling, but nothing came out. I've asked on #ubuntu-server, but nobody knew what to do. I've asked on #eucalyptus but got no answer at all. Any ideas on why this is happening and how to solve it? Thanks EDIT: after many hours, I've found out that the problem has nothing to do with Eucalyptus. It looks like the image is buggy. Very, very buggy. The first problem is that the Kernel in the image is a -generic kernel, while I suppose it should be a -virtual one. I chrooted into the image, removed the -generic packages, replaced it with the -virtual ones. Then I extracted the new kernel (and replaced the original one (-generic) that came with the tarball) because I need it when I publish and launch an image with Eucalyptus. The problem described above was solved. But then, the console started showing this: mount: mount point ext4 does not exist If you check the /etc/fstab file in the image, it says: LABEL=cloudimg-rootfs ext4 defaults 0 1 Damnt, where's my mount point? Note that it is missing /proc as well. Well, when you think it is over, you will notice that your instance will have no network connectivity. Let's check /etc/network/interface: # interfaces(5) file used by ifup(8) and ifdown(8) auto lo iface lo inet loopback Oh my! It is missing eth0... here I stopped. I can't take no more. I give up. Looks like Canonical has just forgotten to properly set up this image. At first, I though: "have I downloaded a server image by mistake?", but no, I double checked. It is really the cloud image, it has even "cloud-init" installed (which is not, by default, on server images). They just forgot to prepare it. I will file a bug (and reference it here once this is done), and hope they fix it soon! EDIT 2: it looks like the network configuration was the last thing missing. I decided to test it with the fixes above, and it booted properly! However, I haven't got the slightest idea if the image is now good to go...

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• Archive Recorded Show from DVR

  - by BillN

  IF I have an AT&T U-Verse DVR, is there a way to copy the information off the DVR to an PC for Archiving/burning to a DVD? I know that I could connect the A/V outs on the DVR to the A/V inputs on a DVD Recorder, or to a capture card on a PC, and Play the show, and record in real-time on the DVD or PC, but if the show is say a World Cup Game, this would take 2-3 hours per. My thought is that the DVR is just a HardDrive, and the files have to be stored in an digital format, it should be possible to do a copy of some sort. I'm currently recording all of the WC games, but if I don't watch them right away, I'm concerned that I will push other programming that the rest of the family has recorded out, making me unpopular at home. Note, I'm talking about archiving for personal use, not redistribution or anything.

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• Cisco login on-failure using syslog doesn't show username on failure?

  - by Jim

  interesting issue I am running into. I am trying to get syslog rmeote logging working with a Cisco switch. i have it working and logging for both on-success and on-failure. However when it is a failed login attempt it does not show the user name that tried to log in in the logs? Here is what the log looks like after a failed login: %SEC_LOGIN-4-LOGIN_FAILED: Login failed [user: ] [Source: 10.0. 0.6] [localport: 23] [Reason: Login Authentication Failed] Here is what I ahve in the sh run: login block-for 60 attempts 3 within 60 login delay 1 login on-failure log login on-success log archive log config logging enable notify syslog contenttype plaintext logging trap notifications logging facility local4 logging 10.0.0.8 aaa new-model aaa authentication login default local group tacacs+ aaa authorization config-commands aaa authorization exec default local group tacacs+

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• What WYSIWYG software can I use to create a web page?

  - by Roman

  I always made web pages by writing HTML code but now I would like to try to use some WYSIWYG approach. Can anybody recommend me a program which I can use for that? I mean a program in which you can move buttons, tables, pictures by mouse. You can change size and shape by mouse. You can use nice templates for "block of text", buttons, background and so on. I am using Windows 7. May be I already have something pre-installed?

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• Windows Server 2012 Essentials - Trying to setup "Anywhere Access" but the "Computer Access" list for users is blank

  - by tetranz

  I have a new installation of Windows Server 2012 Essentials and I'm trying to setup "Anywhere Access" for both VPN and remote desktop. The basic setup is all working. Shared folders is working but remote desktop has no computers available. On the server, if I edit a user with the Essentials Dashboard and go to "Computer access", the list is empty. The desktop computers have been joined to the domain. I can see them in AD under "Computers". I think our mistake was that we didn't use the connector tool to join the domain. We moved from a previous domain and went to Computer / Properties, changed the domain and started with a new profile. Is there something I can do now to make these desktops available for remote desktop? I can access a desktop directly no problem by going directly to it with the RDP client on port 3389. I do that from the outside world through an SSH tunnel.

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• Outlook 2007 - Monospace/preformatted quickstyle

  - by joelarson

  In Outlook 2003 I could set a block of text as preformatted, which was mighty handing for emailing code snippets. This prevented line wrapping, and specified that a monospace font be used in whatever email client recieved my email. Now in Outlook 2007, there are at least three problems: 'Plain Text' style (apparently the closest thing to 'preformatted' as a style) is buried beneath about five clicks, and adding it to the quick style gallery and saving the gallery seems to be forgotten (bug?) It uses some fancy Microsoft font 'Consolas' that is not on some of my coworkers machines that use thunderbird It does not appear that there is any way to get it flagged as a monospace font so that other email clients will display it properly. Does anybody know how to quickly set text to 'preformatted' as Outlook 2003, meaning A) use a monospace font B) flag it as monospace for other clients C) avoid hard line breaks?

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