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• Computing Number of Bits in Public Key

  - by eb80

  I am working with DKIM and trying to compute the public key size of some DKIM signatures. I know from tools that Gmail's is now 2048, but how could I have figured this out myself (i.e., what exact Linux commands and why)? user@host$ dig txt 20120113._domainkey.gmail.com ; <<>> DiG 9.8.3-P1 <<>> txt 20120113._domainkey.gmail.com ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 52228 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;20120113._domainkey.gmail.com. IN TXT ;; ANSWER SECTION: 20120113._domainkey.gmail.com. 300 IN TXT "k=rsa\; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA1Kd87/UeJjenpabgbFwh+eBCsSTrqmwIYYvywlbhbqoo2DymndFkbjOVIPIldNs/m40KF+yzMn1skyoxcTUGCQs8g3FgD2Ap3ZB5DekAo5wMmk4wimDO+U8QzI3SD0" "7y2+07wlNWwIt8svnxgdxGkVbbhzY8i+RQ9DpSVpPbF7ykQxtKXkv/ahW3KjViiAH+ghvvIhkx4xYSIc9oSwVmAl5OctMEeWUwg8Istjqz8BZeTWbf41fbNhte7Y+YqZOwq1Sd0DbvYAD9NOZK9vlfuac0598HY+vtSBczUiKERHv1yRbcaQtZFh5wtiRrN04BLUTD21MycBX5jYchHjPY/wIDAQAB" ;; Query time: 262 msec ;; SERVER: 8.8.8.8#53(8.8.8.8) ;; WHEN: Mon Nov 19 10:52:06 2012 ;; MSG SIZE rcvd: 462

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• no A record show in the answer section in dig results

  - by eric low

  To check the record for the domain, run dig with domain name as the parameter. dig example.com any I get the below result. Why there is no A record show in the result. What did i do wrong during the setup. Please advice what suppose to look into it. Hope everyone can help me to resolve the case asap. ; <<>> DiG 9.9.3-P2 <<>> example.com any ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 44674 ;; flags: qr rd ra; QUERY: 1, ANSWER: 8, AUTHORITY: 4, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;example.com. IN ANY ;; ANSWER SECTION: example.com. 3489 IN MX 100 biz.mail.com. example.com. 3482 IN NS ns1.domain.com. example.com. 3482 IN NS ns2.domain.com. ;; AUTHORITY SECTION: example.com. 3482 IN NS ns2.domain.com. example.com. 3482 IN NS ns1.domain.com. ;; Query time: 0 msec ;; SERVER: xxx.252.xxx.xxx#53(xxx.252.xxx.xxx) ;; WHEN: Wed Oct 30 04:48:34 CDT 2013 ;; MSG SIZE rcvd: 349

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• What are the benefits vs costs of comment annotation in PHP?

  - by Patrick

  I have just started working with symfony2 and have run across comment annotations. Although comment annotation is not an inherent part of PHP, symfony2 adds support for this feature. My understanding of commenting is that it should make the code more intelligible to the human. The computer shouldn't care what is in comments. What benefits come from doing this type of annotation versus just putting a command in the normal PHP code? ie- /** * @Route("/{id}") * @Method("GET") * @ParamConverter("post", class="SensioBlogBundle:Post") * @Template("SensioBlogBundle:Annot:post.html.twig", vars={"post"}) * @Cache(smaxage="15") */ public function showAction(Post $post) { }

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• google earth 7, 32bit in 12.10 runs without error but there is no image (globe)

  - by Dennis

  Everything seemed to install fine. I can start google earth and all layers are available, I can even zoom in and look at 3-D buildings. But there is absolutely no image data displayed at all. If you look at the whole globe the outlines are there on an invisible globe. As you zoom in the base looks dark grey almost black but there is no image. I have tried. Tools Options Graphics Safe Mode Tools Options Texture colors all combinations Tools Options Cache (tried several changes to the numbers) lspci shows Display controller: Intel Corporation Mobile 915GM/GMS/910GML Express Graphics Controller (rev 03) Running on a Dell Inspiron 6000 laptop (1.5Gb memory)

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• Did Google Delete my index?

  - by Sei

  I have a website that I haven't had much time to take care of. I updated it 4 times since last October, the contents are all original and informative. I can see those cache from Way back Machine and the site was indexed in Yahoo, but not in google. Did I get my index on Google deleted because I did not update it often? Normally Google crawl often and index fast, I just got really worried if I did something wrong. Is it possible that I set something wrong in the hosting or something? Please help me

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• How do I install Ubuntu to a USB key?

  - by badp

  If you are hurrying to reply, System ? Administration ? StartUp Disk Creator -- no, that's not what I'm talking about. I want to try Ubuntu 11.04's Unity without touching my existing Ubuntu install. To do this, I need to install the nVidia drivers first (sigh). To do this, I need changes to persist a reboot. To do this, I need to really install Ubuntu on a USB key. How do you do that? What I tried I tried to make a USB key from Testdrive, then boot from it, then choose "Install Ubuntu." The installer refused to install to the installation media itself. I tried, from my installed copy of Ubuntu: sudo kvm /dev/sdb --cdrom .cache/testdrive/iso/ubuntu_natty-desktop-i386.iso ...but the installer didn't detect the disk properly.

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• Wireless always disconnect

  - by Silas

  I upgraded my Ubuntu 10.10 for Ubuntu 12.04. I have a Emachines E625 With Ubuntu 12.04 my wireless always disconnects every 10 sec. It didn't do that with 10.10. Here is my config: Linux sylvain-eMachines-E625 3.2.0-30-generic #48-Ubuntu SMP Fri Aug 24 16:54:40 UTC 2012 i686 athlon i386 GNU/Linux total used free shared buffers cached Mem: 1759 1425 333 0 46 925 -/+ buffers/cache: 452 1306 Swap: 1788 0 1788 02:00.0 Network controller: Broadcom Corporation BCM4312 802.11b/g LP-PHY (rev 01) 05:00.0 Ethernet controller: Atheros Communications Inc. AR8132 Fast Ethernet (rev c0) I will really enjoy an answer to solve this problem. Thank you in advance! Silas

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• ping incorrectly pinging 127.0.0.1

  - by AlexW

  I've got an odd DNS issue. I'm running a dual ipv4/ipv6 environment on Linux. Pinging some sites results in ping pinging 127.0.0.1. e.g. #> ping authserver.mojang.com PING authserver.mojang.com (127.0.0.1) 56(84) bytes of data. 64 bytes from localhost.localdomain (127.0.0.1): icmp_seq=1 ttl=64 time=0.045 ms 64 bytes from localhost.localdomain (127.0.0.1): icmp_seq=2 ttl=64 time=0.043 ms 64 bytes from localhost.localdomain (127.0.0.1): icmp_seq=3 ttl=64 time=0.058 ms --- authserver.mojang.com ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 2000ms rtt min/avg/max/mdev = 0.043/0.048/0.058/0.010 ms Dig, however correctly returns the following: # dig authserver.mojang.com ; <<>> DiG 9.9.3-P2 <<>> authserver.mojang.com ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 15800 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 512 ;; QUESTION SECTION: ;authserver.mojang.com. IN A ;; ANSWER SECTION: authserver.mojang.com. 5 IN A 54.235.119.47 ;; Query time: 14 msec ;; SERVER: 2001:4860:4860::8888#53(2001:4860:4860::8888) ;; WHEN: Sat Nov 09 15:34:40 GMT 2013 ;; MSG SIZE rcvd: 66 I'm confused! My web browser returns the correct website, and the same computer booted into Windows also works correctly.

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• Why don't smart phones have an auto-forget password feature? [closed]

  - by Kelvin

  Storing passwords to external services (e.g. corporate email servers) on smart phones is very insecure, since phones are more easily stolen. Has any vendor implemented a feature to only cache a password in memory for a limited amount of time? After the time period has elapsed, the app would ask for the password again. EDIT: I should've clarified - I'm aware that many (most?) users are lazy and want to just "set it and forget it". The always-remember feature will probably always be present. I was curious about an option to enable auto-forget for the security-conscious.

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• ubuntu-support-status error

  - by Robert Vila

  Running Natty, I read: "The ubuntu-support-status command will print the exact status of your system." I typed: $ ubuntu-support-status Traceback (most recent call last): File "/usr/bin/ubuntu-support-status", line 105, in <module> (still_supported, support_str) = get_maintenance_status(cache, pkg.name, support_tag) File "/usr/bin/ubuntu-support-status", line 37, in get_maintenance_status raise Exception("No date tag found") Exception: No date tag found Does someone know why can this happen. Could it be because is it running on a Mac. How can this be fixed?

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• Getting older packages from ppa

  - by highsciguy

  Can I install an older version of a specific package from a ppa? Specifically, I want to get an older version of xserver-xorg-video-intel (and dependencies) from xorg-edgers ppa. The reason is that the older version seemed to work with my hardware. The present version seems to feature (I would like to found out if it is really the source) severe crashes as the present stable releases of this package do. I tried apt-get install pkg=version but didn't succeed. I am afraid that the packages in the cache are lost after apt-get clean I do not even know the precise version number of the previous version, assuming that it doesn't have to be exactly one less. The current version is xserver-xorg-video-intel-2.20.15 Alternatively: Is there a place, e.g. at launchpad, where I can manually download the previous version of the package?

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• ubuntu 10.10 maverick Zentyal . do anyone know where i can find its ? / download and install its ?

  - by santosamaru

  I want to installing Zentyal , do anyone know about the maverick version ? cause i got the news , that saying webmin is not available anymore and i have problem with its so that is why i try to change the webmin into Zentyal , but the problem is as i can find the version that they have is For Ubuntu 10.04 (Lucid) mine was ubuntu 10.10 maverick. i have problem with speed connections, that is why i need Zentyal so its will help me to build the squid to cache the webpage so its will help to make faster , lol, please your idea bout problem ,this, thanks.

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• New Endpoint options that enable additional application patterns

  - by kaleidoscope

  The two communication-related capabilities:  a) inter-role communication and b) external endpoints on worker roles enable new application patterns in Windows Azure-hosted services. Inter-role Communication - A common application pattern enabled by this is client-server, where the server could be an application such as a database or a memory cache. External Endpoints on Worker Roles - A common application type enabled by this is a self-hosted Internet-exposed service, such as a custom application server. For further details click on the following link: http://blogs.msdn.com/windowsazure/archive/2009/11/24/new-endpoint-options-enable-additional-application-patterns.aspx   Tinu, O

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• Class design for calling "the same method" on different classes from one place

  - by betatester07

  Let me introduce my situation: I have Java EE application and in one package, I want to have classes which will act primarily as cache for some data from database, for example: class that will hold all articles for our website class that will hold all categories etc. Every class should have some update() method, which will update data for that class from database and also some other methods for data manipulation specific for that data type. Now, I would like to call update() method for all class instances (there will be exactly one class instance for every class) from one place. What is the best design?

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• it started with a broken package

  - by Inteloidl.com

  all started when i tried to updated to the latest lts, but the problen is that the update interumpted and some broken packages apeared, i used synaptics to repair, but it wont repair, iv tried some console from some forum topic ... and in the end when i try to open synaptic or update managre this is what apears any ideas : E: Dynamic MMap ran out of room. Please increase the size of APT::Cache-Limit. Current value: 25165824. (man 5 apt.conf) E: Error occurred while processing mantis (NewVersion1) E: Problem with MergeList /var/lib/apt/lists/c.archive.ubuntu.com_ubuntu_dists_lucid_universe_binary-i386_Packages E: The package lists or status file could not be parsed or opened. E: _cache-open() failed, please report. W: Unable to munmap

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• What is the most reliable session storage in PHP: Memcache, database or files?

  - by user1179459

  What is the best and most safest way to handle PHP sessions. Is the best way to store sessions in: Database (more reliable, but high bottleneck, slow speed, not good for high database usage websites)? Memcache (super fast, but distributed more security problems, chances of loosing data when the server restarted and chances of loosing data when the cache is full)? Files (default option, I guess slow since it reads and writes from file I/O, less security, etc). Which method is the best? What are the problems and good things of each of those approaches?

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• Specific website not working on my connection [closed]

  - by Tsury

  For some reason, the website http://www.woopra.com/ doesn't work well (shows as plain html, no css/images/JS) on my computer and my Android tablet (they both share the same internet connection). It does however, work on my WP 7.5 phone (3G). When I try to set a wifi hotspot and use the tablet it still doesn't work (tried to clean cache). I tried FF, Chrome and IE (multiple versions). What is going on here? I'm clueless! Thanks.

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• apt-get not recognizing downloaded archives

  - by meteors

  I installed Ubuntu Gnome 13.10. I previously had Ubuntu Gnome 13.04 and had all the archives in the /var/cache/apt/archives/ stored to a removable disk. After installing 13.10 I copied all my archives to the above mentioned path. When I run apt-get install it tries to fetch the archives although I have the archives. Also if instead of apt-get install if I try to install individual .deb files using dpkg -i everything runs fine. These are the permissions of files: How do I fix this. Previously copying archives like this worked fine and downloading duplicates the files.

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• Google I/O 2010 - GWT Linkers target HTML5 WebWorkers & more

  Google I/O 2010 - GWT Linkers target HTML5 WebWorkers & more Google I/O 2010 - GWT Linkers target HTML5 Web Workers, Chrome Extensions, and more GWT 301 Matt Mastracci At its core GWT has a well-defined and customizable mechanism -- called Linkers -- that controls exactly how GWT's compiled JavaScript should be packaged, served, and run. This session will describe how to create linkers and explains some of the linkers we've created, including a linker that turns a GWT module into an HTML5 Web Worker and one that generates an HTML App Cache manifest automatically. For all I/O 2010 sessions, please go to code.google.com From: GoogleDevelopers Views: 6 1 ratings Time: 59:59 More in Science & Technology

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• SQLServerCentral Webinar Series #21 - Forgotten Rings & Other Monitoring Stories

  Most common monitoring metrics are important and useful, especially over time, but they can fall short. How do you gather information to determine, for example, if you have buffer cache pressure? Register now for the free webinar. Wednesday, October 17 2012 4:00pm - 5:00pm BST Are you sure you can restore your backups? Run full restore + DBCC CHECKDB quickly and easily with SQL Backup Pro's new automated verification. Check for corruption and prepare for when disaster strikes. Try it now.

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• ec2 instance won't boot!

  - by TheToolBox

  So I had a server lose connection while updating to 14.04LTS. Foolishly, it ended up getting rebooted, and now I'm here. I disconnected the volume and mounted it on another system, chrooted it, and updated the kernel. Still no dice. Any idea what the problem could be? Thanks in advance! The instance log is below: ******************* BLKFRONT for device/vbd/2049 ********** backend at /local/domain/0/backend/vbd/3005/2049 Failed to read /local/domain/0/backend/vbd/3005/2049/feature-barrier. Failed to read /local/domain/0/backend/vbd/3005/2049/feature-flush-cache. 16777216 sectors of 512 bytes ************************** [H[J Booting 'Ubuntu 14.04 LTS, memtest86+' root (hd0) Filesystem type is ext2fs, using whole disk kernel /boot/memtest86+.bin ============= Init TPM Front ================ Tpmfront:Error Unable to read device/vtpm/0/backend-id during tpmfront initialization! error = ENOENT Tpmfront:Info Shutting down tpmfront xc: error: panic: xc_dom_core.c:621: xc_dom_find_loader: no loader found: Invalid kernel xc_dom_parse_image returned -1 close(3) Error 9: Unknown boot failure Press any key to continue...

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• Dependency problem while missing package is already installed

  - by hakermania

  I am trying to install a program but I am getting a dependency error. The error clearly points out: Dependency is not satisfiable: libc6-amd64 (>= 2.14) I went on to investigate and I found out that I have 2.19 version installed, actually: alex@MaD-pc:~$ apt-cache policy libc6-amd64 libc6-amd64:i386: Installed: 2.19-0ubuntu6 Candidate: 2.19-0ubuntu6 Version table: *** 2.19-0ubuntu6 0 500 http://us.archive.ubuntu.com/ubuntu/ trusty/main i386 Packages 100 /var/lib/dpkg/status Why am I getting this error if I already have this package? I also should probably mention that the system is 100% up to date. I run the updates and upgrades, restarted the system and then tried to install the package again with the same error popping up. Edit 1: I am using amd64 but I have installed some 32-bit libraries required by some program installed via wine if I recall correctly.

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• Is there an apt command to download a deb file to the current directory?

  - by Lekensteyn

  I am often interested in the installation triggers (postinst, postrm) or certain parts (/usr/share or /etc) of packages. Currently, I am running the next command to retrieve the source code: apt-get source [package-name] The downside is, this file is often much bigger than the binary package and does not reflect the installation tree. Right now, I am downloading the packages through http://packages.ubuntu.com/: Search for [package-name] Select the package Click on amd64/i386 for download Download the actual file This takes too long for me and as someone who really likes the shell, I would like to do something like the next (imaginary) command: apt-get get-deb-file [package-name] I could not find something like this in the apt-get manual page. The most close I found was the --download-only switch, but this puts the package in /var/cache/apt/archives (which requires root permissions) and not in the current directory.

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• Updating query results

  - by Francisco Garcia

  Within a DDD and CQRS context, a query result is displayed as table rows. Whenever new rows are inserted or deleted, their positions must be calculated by comparing the previous query result with the most recent one. This is needed to visualize with an animation new or deleted rows. The model of my view contains an array of the displayed query results. But I need a place to compare its contents against the latest query. Right now I consider my model view part of my application layer, but the comparison of two query result sets seems something that must be done within the domain layer. Which component should cache a query result and which one compare them? Are view models (and their cached contents) supposed to be in the application layer?

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• How to run ubuntu-tweak's janitor automatically?

  - by Eliran Malka

  My aim is to have the janitor running at startup, with a pre-configured profile (e.g. clear redundant packages and browser cache). The website is lacking any documentation or usage instructions, and I could not find any information on this here as well. I tried, naturally, to start ubuntu-tweak from the command line, hoping additional API exists that will come through in this (allegedly) simple task. I only got as far as: ubuntu-tweak -f janitor which is a step in the right direction, but what's still missing is a command for the clear action. Is such a command available, or is there any better way of achieving the desired behavior?

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