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  • Using multiple USB webcams in Linux

    - by rachelderp
    Running more than one USB webcam in Debian/Linux results in the the following error: libv4l2: error turning on stream: No space left on device VIDIOC_STREAMON: No space left on device What initially seemed to be a programming issue in OpenCV turned into a quest for a mysterious hardware/software problem after the same errors were produced by running cheese and xawtv. Apparently it's caused by webcams requesting all the available bandwidth on the USB host controller. With that in mind I decided to run wireshark and capinfos to see just how much bandwidth a single camera used. 4 megabits per second at 320x240 14 megabits per second at 640x480 32 megabits per second at 1920x1080 Interesting! That might explain why two cameras at 320x240 work but any higher resolution fails. It's as if my USB controller is only operating at USB 1 speeds, yet lsusb shows both webcams belonging to a device which supposedly supports 480 megabits per second. One solution proposed forcing the webcams to calculate their bandwidth usage instead of requesting their maximum by running the following commands: sudo rmmod uvcvideo sudo modprobe uvcvideo quirks=128 Unfortunately that made no difference, so I decided to try another solution. A post on StackOverflow suggested telling my webcams to use a lower FPS or compressed video format like MJPEG, but after running v4lctl list it doesn't appear either of my webcams support changing their video mode. And that's where I'm stuck. Why would two webcams operating well below the maximum speed of USB 2 would produce this error? ps: It's not a disk space issue, df displays no change when the webcams are started. pps: If it makes a difference, here's the output of lsusb

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  • delete multiple files on linux with spaces in file names

    - by raido
    I have a directory on my Linux box with over 10000 files that I have to delete. Running... sudo rm -rf /var/tmp/* Gives the error message... sudo: unable to execute /bin/rm: Argument list too long The solution to this is to run sudo find /var/tmp | xargs sudo rm This only works for files with no spaces in the file name. However, some of the files have names with spaces in them and they are not deleted. For example, if a file is named 'A File With Spaces in the Name.dat', Running the command gives me errors like this.... rm: cannot remove `/var/tmp/A': No such file or directory rm: cannot remove `File': No such file or directory rm: cannot remove `With': No such file or directory rm: cannot remove `Spaces': No such file or directory rm: cannot remove `in': No such file or directory rm: cannot remove `the': No such file or directory rm: cannot remove `Name.dat': No such file or directory How do I pass the complete file path to xargs sudo rm without breaking up the file name.

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  • Set an Excel cell's color based on multiple other cells' colors

    - by Lord Torgamus
    I have an Excel 2007 spreadsheet for a list of products and a bunch of factors to rate each one on, and I'm using Conditional Formatting to set the color of the cells in the individual attribute columns. It looks something like this: I want to fill in the rating column for each item with a color, based on the color ratings of its individual attributes. Examples of ways to determine this: the color of the category in which the item scored worst the statistical mode of the category colors the average of the category ratings, where each color is assigned a numerical value How can I implement any or all of the above rules? (I'm really just asking for a quick overview of the relevant Excel feature; I don't need step-by-step instructions for each rule.)

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  • Exchange 2010 mail routing with Hub Transport in multiple sites

    - by jmreicha
    I have two separate physical sites, Site A and Site B. In site A, I have following: 2 CAS servers 2 Hub Transport servers 2 Mailbox servers 2 Edge servers In site B, I have the following: 1 CAS 1 Hub 1 Mailbox 1 Edge Currently everything is working out of site A. That is, all users are housed on mailboxes that are in site A and all inbound mail flow is pointing to site A. I would eventually like to be able to move some of the mailboxes to site B without causing a disruption for resliency and redundancy purposes but I am not quite sure how to go about setting this up or if it is even possible. So far I have created an Edge subscription in site B and am able to send emails out from test accounts set up with mailboxes on the site B Mailbox server. However, I am unable to receive incoming mail messages and am confused. So I'm thinking incoming mail messages are still being directed to site A and then they are getting stuck because there is no way to route the mail to the site B mailboxes. Is this assumption correct? I am unfamiliar with mail flow and routing so I am not really sure what I need to be looking at? Would I add the site B hub transport to the Edge subscription in site A? Or I guess more specifically, how would I go about enabling communication and mail flow between mailboxes split up on site A and B?

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  • mysql is not using multiple cpus

    - by mhost
    Our MySQL server has been using a lot of CPU lately (it's reached 100% several times and stays there for a while) and I noticed that it the CPU load is all on one core of one cpu. I was hoping to spread that out to all 4 on my server. I have been tweaking the MySQL settings to use more ram and less cpu, but it still occasionally reaches very high CPU usage. It seems like everything about the topic refers to thread_concurrency (which I've read is a solaris only setting). What can I do in Linux? Thanks.

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  • trying to setup multiple primary partitions on ubuntu linux [migrated]

    - by JohnMerlino
    I currently have ubuntu desktop installed on a harddrive. I want to partition the harddrive so that I can reserve 30 gigs for ubuntu server and 30 gigs for ubuntu desktop. The drive has 300 gigs available. Right now I am booting from dvd drive and installing ubuntu server. I selected "Guided partitioning" and created a 30 gig primary partition of Ext4 journaling filesystem, set "yes, format it" for format partition and set bootable flag to on. I intend to use this 30 gig partition to hold ubuntu server and allow me to boot from it. Now I have two other partitions. They are both set to "logical", one is currently using 285.8 gigs and is using ext4 (when I try to set bootable flag to true, it gives a warning "You are trying to set the bootable flag on a logical partition. The bootable flag is only useful on the primary partitions"). More alarming it says "No existing file system was detected in this partition". Actually, Im thinking that this is the parittion that is supposed to be holding my current Ubuntu Desktop. And of course I want this to be bootable and be a primary partition, so I could dual boot from this and the server partition. Now the third partition is also set to logical and it is being used as swap area. My question is regarding that second partition. Its supposed to be a primary partition thats holding my existing ubuntu desktop edition. How do I switch it to primary and to make sure that its pointing to my existing desktop installation?

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  • Apache httpd VirtualHost config - multiple sites

    - by DaFoot
    [Advised to post here from StackExchange] I have a site to work on, because of the way the URLs are built the application seems to have been created on the assumption that it will be at the server root (only app). On my dev server I have other projects and up to now a simple symlink has been working for me, but that's not the case now because this new app wants to sit at the route and process all URLs arriving on :80. Hopefully this snippet from httpd.conf will help explain what I'm trying to acheive: # default for any not matched elsewhere <VirtualHost *:80> ServerName localhost DocumentRoot /var/www/html/newproject </VirtualHost> # now try to pick out specific URLs <VirtualHost localhost/webdev> DocumentRoot /var/www/html/existingProject ServerName localhost/project </VirtualHost> Also need to be able to get same affect from wherever I'm accessing the httpd instance from. Hope that makes sense.

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  • Find rows that match multiple (two) criteria

    - by Scott Sanders
    I am trying to get a list of items that match on two criteria. DATE PRODUCT CHANNEL DEC 13 Cat Chow DRUG NOV 13 Pupperoni DRUG DEC 13 Meow Mix DRUG DEC 13 Jerky Treats DRUG This is the data from A1 to C5. I want all the product sold on DEC 13 and in the DRUG channel. This is the formula that I have now, which is only bringing back the first example. INDEX($B$2:$B$5, MATCH(1, ("DRUG"=$C$2:$C$5)*("DEC 13"=$A$2:$A$5), 0) )

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  • How to match against multiple value possiblities in Excel

    - by Henno
    I have list of person names in column A. I want to display "1" in column B for names which end with either "e" or "i" or "n". If there would be only one match to test against, I would write something like: =IF( MID(A1,FIND(" ",B1)-1,1) = "e", "1", "0") In PHP I would solve that like this: echo in_array( $names[$row_number], array('e', 'i', 'n') ) ? '1' : '0'; What formula should I use in column B in Excel?

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  • Sharing files between multiple computers?

    - by Koalatea
    At my school, we have 13 iMacs that we use to make our yearbook. Currently our school has some servers for us, but since we work with so many files ( thousands of pictures, most of which are ~3MB ) it slows down far too much. Is there a way to better share files between our computers? We are on a wireless network and the whole school shares the same servers, we have around probably 400 computers in the school. Is there a hardware fix I can do? Something like buying an external and hooking only yearbook computers to it?

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  • CSS3: Stripe table with multiple <tbody> elements

    - by xyz
    Hello, I've got a table with multiple <tbody> elements. At a given time, only one <tbody> is displayed, or all of them are displayed. I currently use this CSS3 code to stripe the table. table tr:nth-child(even) { background: #efefef; } When a single <tbody> element is shown, everything is (obviously) fine, but when multiple <tbody> elements are shown the CSS rules apply to each one separately, and each <tbody> has its own "stripes system". Together the stripes may or may not look consistent, depending on the number of rows. <tbody> <tr> [ODD] <tr> [EVEN] <tr> [ODD] </tbody> <tbody> <tr> [ODD] <tr> [EVEN] </tbody> ... Would I absolutely have to use JavaScript (...jQuery) to fix this?

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  • grep/search for multiple lines in a file.

    - by GSto
    Let's say I have a file with a long nested array, that's formatted like this: array( 'key1' => array( 'val1' => 'val', 'val2' => 'val', 'val3' => 'val', ), 'key2' => array( 'val1' => 'val', 'val2' => 'val', 'val3' => 'val', ), //etc... ); what I would like to do is have a way to grep/search a file, and by knowing key 1, get all the lines (the sub-array) it contains. is this possible?

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  • How to share datastores between multiple exchange servers?

    - by Johan
    I have an Exchange 2003 box that is seriously overstressed. I want to transfer its duties to a new and faster box. I don't cannot suffer downtime, so I have to do this stuff live. Here's what I plan to do: Install Exchange 2003 on the new server Set up the new server, so it will accept requests from users for their mailboxes I want to do as little manual set up as possible, because that 'll eat up my time and is too error prone Than I want to transfer my datastores one by one to the new server and have those users (once the datastore in the new server is up and running) to get their data from the new server (without them noticing) I don't have to transfer all the datastores, some of them need to stay on the old box (because I'm still waiting for extra HD space to arrive from the supplier) What steps do I need to follow to do this? The new box has never seen this domain before, the old exchange server is not the DC, we have a dedicated DC.

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  • What's the best way to get a bunch of rows from MySQL if you have an array of integer primary keys?

    - by Evan P.
    I have a MySQL table with an auto-incremented integer primary key. I want to get a bunch of rows from the table based on an array of integers I have in memory in my program. The array ranges from a handful to about 1000 items. What's the most efficient query syntax to get the rows? I can think of a few: "SELECT * FROM thetable WHERE id IN (1, 2, 3, 4, 5)" (this is what I do now) "SELECT * FROM thetable where id = 1 OR id = 2 OR id = 3" Multiple queries of the form "SELECT * FROM thetable WHERE id = 1". Probably the most friendly to the query cache, but expensive due to having lots of query parsing. A union, like "SELECT * FROM thetable WHERE id = 1 UNION SELECT * FROM thetable WHERE id = 2 ..." I'm not sure if MySQL caches the results of each query; it's also the most verbose format. I think using the NoSQL interface in MySQL 5.6+ would be the most efficient way to do this, but I'm not yet up to MySQL 5.6.

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  • Creating a file with Puppet with facts from multiple hosts

    - by Belly
    I'm trying to have puppet build a configuration file that looks like this: [All] Hosts=apt-dater@puppetmaster;apt-dater@blaster; (etc...) Basically, this file needs an entry for each node that includes the apt-dater class. I've been experimenting with exported resources, but I can't find a clean way of putting it together. How should I go about creating this file?

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  • mysql is not using multiple cpus

    - by helpmhost
    Hi, Our MySQL server has been using a lot of CPU lately (it's reached 100% several times and stays there for a while) and I noticed that it the CPU load is all on one core of one cpu. I was hoping to spread that out to all 4 on my server. I have been tweaking the MySQL settings to use more ram and less cpu, but it still occasionally reaches very high CPU usage. It seems like everything about the topic refers to thread_concurrency (which I've read is a solaris only setting). What can I do in Linux? Thanks.

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  • URI Rewrite with fake subdomains and multiple variables

    - by Rich
    Can someone please help with trying to use mod rewrite so foo.domain.com is rewritten to domain.com/p.php?s=foo and foo.domain.com/bar to domain.com/p.php?s=foo&p=bar? Currently my .htaccess is: RewriteEngine On # Remove www RewriteCond %{HTTP_HOST} ^www.domain.com$ [NC] RewriteRule ^(.*)$ http://domain.com/$1 [R=301,L] # Rewrite subdomain etc. RewriteCond %{HTTP_HOST} ^(.*)\.domain\.com$ [NC] RewriteRule ^([^/]+)/?$ p.php?s=%1&p=$2 [QSA,L,NC] But I can't work out how to grab the second variable (being optional and after a slash at the end of the URI. I've tried changing the end of the condition to ?/(.*)$, but to no avail and my mod rewrite skills are certainly naff!

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  • exchange server 2010 with multiple domains

    - by air
    i have one exchange server 2010, which is working fine with one domain. my exchange is working as follows pop3 collector collect emails from one master catchall account and then deliver to exchange server, this working perfect. now what i want to add another domain to same exchange, i have added new domain as trusted domain & email policy and this new domain email account works fine with internal emails. now what i have done, i again forward new email account to same catchall account. but if i send email from any other external email address email is bounce, i can see email receive by pop3 collector but bounce by exchange server. to make you more clear let me explain logic on which i am working. i have 2 domains 1. domain1.com ([email protected]) 2. domain2.com ([email protected] -->[email protected]) now on my machine with exchange server i have pop3 collector which collect all emails from [email protected] and forward to exchange 2010 server. all emails to domain1.com is working perfect but when i send email to [email protected] this email redirect to [email protected] perfectly but when exchanger server receive this email, it bounce. i have also study the url link text and follow the whole process but no success. i also check that my DNS/MX is working fine as the bounce message is going from my exchange server. EDIT the only problem is with accepted domain, as email come to exchange server then bounce back. i just try this today i create one user called test, then i goto his properties -- email there was only one email account [email protected] i try to send email to [email protected] from internet (email bounce) then again i go to test user properties -- email and Add one email [email protected] again u try to send email to t*[email protected]* from internet (email received) i think the only problem is with accepted domain but in hub transport , it shows accepted is there any way to check does domain is properly accepted or not in exchange 2010 server. Thanks

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  • multiple screen support

    - by pedr0
    Hi at all, I have some problem with multiple screen support, I work with dp(dpi) for specify the layout_heigth and layout_width and I hope that is the better way to support multiple screen, but when I tried with two smartphone I meet two different result. I give an example, this is a layout I use: <?xml version="1.0" encoding="UTF-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/cities_main_layout" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <ListView android:id="@+id/citieslist" android:layout_width="wrap_content" android:layout_height="320dip" android:layout_gravity="center_vertical" android:layout_below="@id/cities_main_layout" /> <LinearLayout android:id="@+id/cities_button_layout" android:orientation="horizontal" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@id/citieslist" android:layout_gravity="center_vertical"> <Button android:id="@+id/bycountry" android:layout_height="50dip" android:layout_width="105dip" android:background="@drawable/buttonmarket" android:text="@string/button_bycountry" /> <Button android:id="@+id/top10" android:layout_height="50dip" android:layout_width="105dip" android:background="@drawable/buttonmarket" android:text="@string/button_top10" /> <Button android:id="@+id/recommended" android:layout_height="50dip" android:layout_width="105dip" android:background="@drawable/buttonmarket" android:text="@string/button_recommended" /> </LinearLayout> </RelativeLayout> The button are at the bottom of the layout, and I see two different result: In the last smartphone I can see the buttons, instead in the first I cannot...what's wrong? I have to write a layout for any set of screen??!!!

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  • Multiple FIle Upload in FTP Using CMD

    - by user697363
    I've large number of files, over 10,000, which I want to upload in FTP server. Now, I can't zip those files & upload it as I've to read those files individually in SAS software for my analysis. If I use mput commant, then the prompt as me to say "y" eact time it tries to upload the file. This is very cumbersome. Is there any method by which it automatically upload the files without I've to manually entering "y" each time file wants to upload. The command I was using was: ftp ftp.myftp.com *my ftp server name username:myusername password:mypassword ftp> lcd c:\local_folder ftp> mput *.*

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  • Separate the multiple ipv6 addresses

    - by Ruriko
    I have a vps that comes with 16 ipv6. I used one of the addresses and I tried testing the proxy at http://ipv6-test.com/ but it detected that is using the first ipv6 adddress instead of the certain ipv6 address that I provided. Example I used 2607:f358:0001:fed5:0022:772f:6ed3:7f3c as my proxy but it detected as 2607:f358:0001:fed5:0022:0000:db61:85e1 . Why is it doing that? The proxy server I am using is polipo

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  • Passwordless ssh on multiple machines

    - by Phil
    Hi all, I'm quite confused with all the ssh security stuff. I am trying to reconfigure a system that is currently broken for reasons unknown. Machine A is your personal computer that you use whenever you're at home. Machine B is the head node of an HPC cluster and all the other machines C are all identically configured machines which share the home directories of machine B. This is an HPC cluster if you haven't guessed. How would I configure passwordless ssh between any nodes B or C. A can only get to C through sshing into B

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