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  • can't run sqldeveloper on Ubuntu

    - by nazar_art
    I tried to install sqldeveloper by following way: Download SQL Developer from Oracle website (I chose Other Platforms download). Extract file to /opt: sudo unzip sqldeveloper-*-no-jre.zip -d /opt/ sudo chmod +x /opt/sqldeveloper/sqldeveloper.sh Linking over an in-path launcher for Oracle SQL Developer: sudo ln -s /opt/sqldeveloper/sqldeveloper.sh /usr/local/bin/sqldeveloper Edit /usr/local/bin/sqldeveloper.sh replace it's content to: #!/bin/bash cd /opt/sqldeveloper/sqldeveloper/bin ./sqldeveloper "$@" Run SQL Developer: sqldeveloper But it shows next output: nazar@lelyak-desktop:/opt/sqldeveloper? ./sqldeveloper.sh Oracle SQL Developer Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. LOAD TIME : 401# # A fatal error has been detected by the Java Runtime Environment: # # SIGSEGV (0xb) at pc=0x00007f3b2dcacbe0, pid=20351, tid=139892273444608 # # JRE version: Java(TM) SE Runtime Environment (7.0_65-b17) (build 1.7.0_65-b17) # Java VM: Java HotSpot(TM) 64-Bit Server VM (24.65-b04 mixed mode linux-amd64 compressed oops) # Problematic frame: # C 0x00007f3b2dcacbe0 # # Core dump written. Default location: /opt/sqldeveloper/sqldeveloper/bin/core or core.20351 # # An error report file with more information is saved as: # /tmp/hs_err_pid20351.log # # If you would like to submit a bug report, please visit: # http://bugreport.sun.com/bugreport/crash.jsp # /opt/sqldeveloper/sqldeveloper/bin/../../ide/bin/launcher.sh: line 1193: 20351 Aborted (core dumped) ${JAVA} "${APP_VM_OPTS[@]}" ${APP_ENV_VARS} -classpath ${APP_CLASSPATH} ${APP_MAIN_CLASS} "${APP_APP_OPTS[@]}" 134 nazar@lelyak-desktop:/opt/sqldeveloper? java -version java version "1.7.0_65" Java(TM) SE Runtime Environment (build 1.7.0_65-b17) Java HotSpot(TM) 64-Bit Server VM (build 24.65-b04, mixed mode) Here is content of /tmp/hs_err_pid20351.log How to solve this trouble?

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  • Launching php script through comman line - keeping terminal window open after execution

    - by somethis
    Oh, my girlfriend really likes it when I launch php scripts! There's something special about them, she says ... Thus, I coded this script to run throught the CLI (Command Line Interface) - so it's running locally, not on a web server. It launches just fine through right click open run in terminal but closes right after execution. **Is there a way to keep the terminal window open? Of course I can launch it through a terminal window - which would stay open - but I'm looking for a one click action. With bash scripts I use $SHELL but that didn't work (see code below). So far, the only thing I came up with is sleep(10); which gives me 10 seconds for my girl to check the output. I'd rather close the terminal window manually, though. #!/usr/bin/php -q <?php echo "Hello World \n"; # wait before closing terminal window sleep(10); # the following line doesn't work $SHELL; ?> (PHP 5.4.6-1ubuntu1.2 (cli) (built: Mar 11 2013 14:57:54) Copyright (c) 1997-2012 The PHP Group Zend Engine v2.4.0, Copyright (c) 1998-2012 Zend Technologies )

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  • Similar domains using my business' content, and stealing SEO results

    - by Murciano
    I've been hired to create a website for a restaurant in my city, let's call it "Flying Dragon" Chinese restaurant. The restaurant has never had a website, though the business itself is about ten years old. However, if you Google the restaurant's name, the first site that comes up seems to be affiliated with the restaurant itself, even though it is not. This site - let's say, flyingdragonchinese.com - is also the one that Google has apparently selected, in its results, to be the official website of the restaurant - in essence, the first Google result is flyingdragonchinese.com, and directly beneath it, within the same entry, are the Google reviews and contact information. Upon visiting flyingdragonchinese.com (again, not the actual name), I see that the website has taken the menu content from the restaurant, in the same manner that Yelp does, but it also seems (to the untrained eye) to be the restaurant's official site. Basically, someone has created a fake website for the business (I am not sure why) using its actual menu and contact information, and is hogging the search results. The concept is similar to a "scraping site" except that the information seems to have been stolen manually. The main problem is that visitors to this site will have an inaccurate impression of the restaurant. I feel like the obvious solution is to register a new domain for my site, and simply beat out this competitor (or whatever it is) with smarter SEO and business verification with Google. However, the Conan-the-Barbarian-web-designer part of me wants to somehow bash this other site (deservedly?) into oblivion. But I don't know what I can really do, besides maybe issuing a cease-and-desist letter, or trying to contact the web host for the site, although there is no contact information available on this "fake" site for the site owner. Has anyone ever experienced something like this? Is there any solution?

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  • Finish feature reverted commits from develop

    - by marco-fiset
    I am using git as a version control system, and using git-flow as the branching model. I started a feature branch some weeks ago in order to maintain the system in a clean state while developping that feature. The main development continued on the develop branch, and changes from develop were merged periodically into the feature, to keep it up to date as much as possible. However came the time where the feature was finished, and I used git-flow's finish feature to merge the feature back into develop. The merge was successfully done, but then I found out that some of the commits I made in develop were reverted by the merge commit! Nowhere in develop or in the feature branch were these changes reverted, I can't see any commit that overwrote them. I just can't find anything. The only theory I have for the moment is that git is failing on me, but that would be extremely unlikely. Maybe I did some kind of wrong manipulation that made this situation come true? I can trace back in the history when the commit was made. I can see that the changes from that commit were reverted by the merge commit. Nowhere in the branch I see a commit that reverts those changes. Yet they were reverted. How is this even possible?

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  • Were the first assemblers written in machine code?

    - by The111
    I am reading the book The Elements of Computing Systems: Building a Modern Computer from First Principles, which contains projects encompassing the build of a computer from boolean gates all the way to high level applications (in that order). The current project I'm working on is writing an assembler using a high level language of my choice, to translate from Hack assembly code to Hack machine code (Hack is the name of the hardware platform built in the previous chapters). Although the hardware has all been built in a simulator, I have tried to pretend that I am really constructing each level using only the tools available to me at that point in the real process. That said, it got me thinking. Using a high level language to write my assembler is certainly convenient, but for the very first assembler ever written (i.e. in history), wouldn't it need to be written in machine code, since that's all that existed at the time? And a correlated question... how about today? If a brand new CPU architecture comes out, with a brand new instruction set, and a brand new assembly syntax, how would the assembler be constructed? I'm assuming you could still use an existing high level language to generate binaries for the assembler program, since if you know the syntax of both the assembly and machine languages for your new platform, then the task of writing the assembler is really just a text analysis task and is not inherently related to that platform (i.e. needing to be written in that platform's machine language)... which is the very reason I am able to "cheat" while writing my Hack assembler in 2012, and use some preexisting high level language to help me out.

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  • Search inside Xournal files (.xoj)

    - by Javad Sadeqzadeh
    I'm a big fan of Evernote, I use it regularly. However, it has a 60MB storage limit (although text files are not going to occupy much space, but the limitation concern still remains). Today, I installed Xournal, which has great features like annotating, nice background, free hand shapes and notes, save in PDF format, and many more. But the big problem is that as far as I've noticd, there is no intrinsic feature for seach inside the notes (created using Xournal with .xoj suffix). I used Catfish File Search application (which creates bash commands for full text search), but it couldn't help as well. Is there anyway to search inside a .xoj file at all? If so, it could be a suitable alternative to evernote, if you put your .xoj files on a cloud (which certainly offers you much more storage space than 60MB). If not, is there any other convenient app similar to Evernote, but with higher storage limit or without a limit? Somebody suggested Zim desktop wiki app, which looks great, but I'm nut sure if I could copy and paste everything there (a mixture of photos and tables and text with various formats and highlights), like what I do with Evernote. And a very useful tool I use is Evernote Web Clipper (browser extension). Of course, having a desktop client like Everpad is a plus, but not the absolute need. PS: I use pocket, so please do suggest that (it only preserve links (which might change over time) not the actual text). I also use google drive or docs, I don't like that for this purpose niether, it's too slow, doesn't have a browser extension and a desktop client. Thank you so much in advance.

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  • Restoring GRUB2 on Software RAID 0 after Windows 7 wiped it using LiveCD

    - by unknownthreat
    I have installed Ubuntu 10.10 on my system. However, I need to install Windows 7 back, and I expect that it would alter GRUB and it did. Right now, my partition on my Software RAID 0 looks like this: nvidia_acajefec1 is Ubuntu 10.10 and nvidia_acajefec3 is Windows 7. I've been following some guides around and I am always stuck at GRUB not able to detect the usual RAID content. I've tried running: sudo grub > root (hd0,0) GRUB complains it couldn't find my hard disk. So I tried: find (hd0,0) And it complains that it couldn't find anything. So I tried: find /boot/grub/stage1 It said "file not found". Here's the text from the console: ubuntu@ubuntu:~$ grub Probing devices to guess BIOS drives. This may take a long time. [ Minimal BASH-like line editing is supported. For the first word, TAB lists possible command completions. Anywhere else TAB lists the possible completions of a device/filename. ] grub> root (hd0,0) root (hd0,0) Error 21: Selected disk does not exist grub> find /boot/grub/stage1 find /boot/grub/stage1 Error 15: File not found Fortunately, I got one person suggesting that what I've been trying to do is for GRUB Legacy, not GRUB2. So I went to the suggested website, ** (http://grub.enbug.org/Grub2LiveCdInstallGuide) **try to look around, and try: ubuntu@ubuntu:~$ sudo fdisk -l Unable to seek on /dev/sda This is just the step 2 of the instruction in the http://grub.enbug.org/Grub2LiveCdInstallGuide and I cannot proceed because it cannot seek /dev/sda. However, ubuntu@ubuntu:~$ sudo dmraid -r /dev/sdb: nvidia, "nvidia_acajefec", stripe, ok, 488397166 sectors, data@ 0 /dev/sda: nvidia, "nvidia_acajefec", stripe, ok, 488397166 sectors, data@ 0 So what now? Do you have an idea for how to make fdisk see my RAID array on live cd (Ubuntu 10.10)? Honestly, I am lost, very lost in trying to restore GRUB2 on this software RAID 0 system right now.

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  • Why is apt-get --auto-remove not removing all dependencies?

    - by Mike
    I just installed a package (dansguardian in this case) and apt told me that I had unmet dependencies. # sudo apt-get install dansguardian Reading package lists... Done Building dependency tree Reading state information... Done The following extra packages will be installed: clamav clamav-base clamav-freshclam libclamav6 libtommath0 Suggested packages: clamav-docs squid libclamunrar6 The following NEW packages will be installed: clamav clamav-base clamav-freshclam dansguardian libclamav6 libtommath0 0 upgraded, 6 newly installed, 0 to remove and 0 not upgraded. Need to get 0 B/4,956 kB of archives. After this operation, 14.4 MB of additional disk space will be used. Do you want to continue [Y/n]? So I installed it and the dependencies. So far so good. Later on, I decide that this package just isn't the package for me, so I want to remove it and all of the other junk it installed with it since I'm not going to be needing any of it: # sudo apt-get remove --auto-remove --purge dansguardian Reading package lists... Done Building dependency tree Reading state information... Done The following packages will be REMOVED: dansguardian 0 upgraded, 0 newly installed, 1 to remove and 0 not upgraded. After this operation, 1,816 kB disk space will be freed. Do you want to continue [Y/n]? However it is only removing that one specific package. What about clamav clamav-base clamav-freshclam libclamav6 libtommath0? Not only did it not remove them, but clamav was actually running a daemon that loads every time the computer boots. I thought that --auto-remove would remove not only the packages, but also the dependencies that were installed with it. So basically, without going through the apt history log file (if I even remember to do so, or if I even remember that a specific package I installed 3 months ago had dependencies along with it), is there a way to remove a package and all of the other dependencies that were installed like in this case?

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  • Is there any site which tells or highlights by zone developer income source? I think i am getting less yearly [closed]

    - by YumYumYum
    http://www.itjobswatch.co.uk/ Thats the only one good site i have found, but missing for Belgium and for other European countries. I was searching a site which can tell the income source details for European developer (specially for Belgium). But mostly not a single website exist who tells the true. My situation: As a programmer myself in one company i use all my knowledge, 20++ hours a day (office , home, office, home) because every-time its challenge/complex/stress/over-time feature-requests, at the end of the year in Europe i was getting in total not even the lowest amount shown here (UK pound vs Euro + high-tech most of the time they use + speed in development): http://www.itjobswatch.co.uk/ In one company i have to use my best performance knowledge for whole year with: C, Java, PHP (Zend Framework, Cakephp), BASH, MySQL/DB2, Linux/Unix, Javascript, Dojo, JQuery, Css, Html, Xml. Company wants to pay lesser but always it has to be perfect and it has to be solid gold and diamond like quality. And the total amount in Europe is not sufficient for me if i compare with other countries and living cost in Europe including taxes. Is there any developers/community site where we can see by country, zone what is minimum to maximum income source getting offered to the developers? So that some developers who is in troubles, they can shout and speak up louder with those references?

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  • Troubleshooting wireless network connectivity

    - by taserian
    I'm currently running Ubuntu 10.10, and I'm running into trouble keeping my wireless connection alive. After rebooting, I get about 5-10 minutes of a good speed connection; afterwards, the connection just zeroes out. I've gotten around to stirring up a shell script that gives me another 10 minutes or so of connectivity. Script contents below: #! /bin/bash sudo ifconfig wlan0 up echo "Enabling wireless device . . ." sleep 5 sudo iwconfig wlan0 essid MyNetworkName echo "Connecting to network. . ." sleep 10 sudo dhclient wlan0 echo "Getting IP address. . ." sleep 5 echo "Done. Closing window. . ." sleep 5 Shortly after running the line "sudo iwconfig wlan0 essid MyNetworkName" from the script, I notice the speed pick up. Other computers in my home running Windows XP are not affected by this problem, so all indications point to my Ubuntu machine. Does anyone have any pointers as to how to resolve this?

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  • Data migration - dangerous or essential?

    - by MRalwasser
    The software development department of my company is facing with the problem that data migrations are considered as potentially dangerous, especially for my managers. The background is that our customers are using a large amount of data with poor quality. The reasons for this is only partially related to our software quality, but rather to the history of the data: Most of them have been migrated from predecessor systems, some bugs caused (mostly business) inconsistencies in the data records or misentries by accident on the customer's side (which our software allowed by error). The most important counter-arguments from my managers are that faulty data may turn into even worse data, the data troubles may awake some managers at the customer and some processes on the customer's side may not work anymore because their processes somewhat adapted to our system. Personally, I consider data migrations as an integral part of the software development and that data migration can been seen to data what refactoring is to code. I think that data migration is an essential for creating software that evolves. Without it, we would have to create painful software which somewhat works around a bad data structure. I am asking you: What are your thoughts to data migration, especially for the real life cases and not only from a developer's perspecticve? Do you have any arguments against my managers opinions? How does your company deal with data migrations and the difficulties caused by them? Any other interesting thoughts which belongs to this topics?

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  • Xmonad Xsession

    - by AntLord
    My user level: noob-ish, so please bear with me I'm running 12.04 LTS. I have installed and, to some extent, configured xmonad 0.10 The "automagically" created xsession for it works fine as it is, but when I login it won't run a startup script I've created and "call from" /usr/share/xsessions/xmonad.desktop, if that's right. I've read pretty much all I could find about .xinitrc and .xsession, I tried that and it somehow messed up the other "sessions", if I'm explaining myself correctly. Had to $unity --reset to have the "main session" working again. Anyway, my question is, how do I autostart xmobar and set a desktop background after login into xmonad's default Xsession? I tried this script, start-xmonad: #!/bin/bash # #I only used one of the following each time I tried, none worked #Also, do I really need the '&'? I know what they're for, but... nitrogen --restore & feh --bg-scale ~/Pictures/picture.png & #Then I want xmobar to start, again do I need the '&'? I know it's for it to run #in the background, but I tried removing the '&' and xmonad still launched xmobar & #Finally, the only thing that seems to work in this script exec xmonad Yes, I made sure I did chomd +x ~/start-xmonad The xmonad.desktop is [Desktop Entry] Name=XMonad Encoding=UTF-8 Comment=Lightweight tiling window manager Exec=/home/myusername/start-xmonad Icon=custom_xmonad_badge.png Type=XSession So, this didn't work, now I'm here. Please help :s thanks

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  • Can't complete dropbox installation from behind proxy in Ubuntu 11.10

    - by Mark Jones
    Problem: My PC on campus sits behind a proxy (requiring authentication) and I can't setup Dropbox. I am convinced that this is a proxy issue as I can't setup Ubuntu one either (but I don't use Ubuntu One so that is not a problem). I have looked at the Ubuntu One fix but it seems to be to modify settings explicitly related to Ubuntu One. I can install the nautilus-dropbox package (compiled from source and from .deb package from website and from software centre) but once I click OK from the "Dropbox Installation" dialog box (prompting me to download the proprietary daemon) the installation just freezes with the OK button pressed. When I look at its process in System Monitor its waiting channel is inet_wait_for_connect. I have set the following proxy directives thus far: Added mj22:**@proxy.waikato.ac.nz:80 information to network proxy settings under network in settings. Added http_host and http_port variables under gconf-editor-system-proxy Added 'host', 'authentication_password' 'authentication_user' and ticked 'user authentication' and 'use_http_proxy' under gconf-editor-system-http_proxy Added export http_proxy="http://mj22:**@proxy.waikato.ac.nz:80/" to /etc/bash.bashrc Added Acquire::http::proxy "http://mj22:**@proxy.waikato.ac.nz:80/"; to /etc/apt/apt.conf (which is what I imagine is letting Software Center retrieve packages). (where ** is my password) I have also added the equivalent ftp and https lines for the above entries. I get the internet fine and Software Centre can download packages but thats it. Related issues: The software centre can't fetch reviews (but can download packages). When trying to add an online account in Gnome 3 a dialog pop up appears with "Error getting a Request Token: Cannot connect to proxy (proxy.waikato.ac.nz)" Updates: After some time (10mins ish) Dropbox shows an error dialog box that reads: Trouble connecting to Dropbox servers. Maybe your internet connection is down, or you need to set you http_proxy environment variable. Is there a way I can see what environment variables are currently set?

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  • Ubuntu 12.10 ATI Driver 12.11 fails after compiz and xorg update

    - by Lukasz W.
    I updated my system via the package manager from Unity and next restart was just blackness. After being here: http://linux.hootip.com/amd-catalyst-12-11-beta-fix-and-installation-the-drivers-on-ubuntu-12-11/ I had the Catalyst 12.11 Beta driver installed. I checked my /var/log/apt/history.log and the update I received was of compiz and xorg packages. I tried to get latest release info, but all I get from their pages are commit info; I can't tell what was n the package update I got served. Anyone knows what was in the latest xorg/compiz release that broke the driver? Which driver should I use now? For completeness this is how I got the system back to boot (probably lame and not elegant): Boot with GRUB selection "More Ubuntu options (or sth like that), From secondary screen select 3.5.0-19 with boot options, When system prompts on stuff you'd like to do, select "root" - Drop to root shell, There: # mount -o remount,rw / # mv /etc/X11/xorg.conf /etc/X11/xorg.conf.failed # /usr/share/ati/fglrx-uninstall.sh # reboot This got be back on my feet.

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  • How to configure chrome to open magnet url's with deluge?

    - by michael_n
    After upgrading to Ubuntu 11.04 (natty) from 10.10, I can no longer open magnet (torrent) links in Chromium, and set deluge to automatically open and accept the url. (Edit: currently ".torrent" files are not a problem, but magnet url's, e.g. of the form "magnet:?xt=urn:...", are now the only problem. Not sure if something updated...?) Rather, now only transmission will automatically open torrents, magnet links, etc. There doesn't seem to be a way to set deluge to be the default torrent client. (And, there also doesn't seem to be a "default application" setting for bittorrent client to replace transmission w/ deluge.) Notes: I found some old threads on this issue, and only a one or two newer ones. The newer threads seem to suggest xdg-open is to blame. But not many people seem to be running into this problem, so... maybe it's just me? Not using firefox, so manually setting apps for mime-types or extensions doesn't work (that's not an option in chrome/chromium, afaik -- you have to rely on the OS) I uninstalled transmission, and then basically nothing happened when clicking on torrent/magnet links. running from the shell also opens transmission (not deluge): xdg-open "magnet:?xt=urn:bt..&tr=http://tracker.....com/announce" My current url handlers are: $ gconftool -a /desktop/gnome/url-handlers/magnet command = deluge "%s" needs_terminal = false enabled = true The only work-around I have (which does work) is to rename /usr/bin/transmission-gtk{,.bak} and create my own /usr/bin/transmission-gtk : $ cat /usr/bin/transmission-gtk #!/bin/bash deluge "$@" Anyone else run into this, know of a bug, workaround, or...?

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  • Oracle Linux 6 update 3

    - by wcoekaer
    Oracle Linux 6.3 channels are now available online http://public-yum.oracle.com repositories. Both base channels and latest channels are available (for free for everyone) http://linux.oracle.com repositories. Behind our customer portal but effectively the same content. Source RPMs (.srpm) are being uploaded to http://oss.oracle.com/ol6/SRPMS-updates. OL6.3 contains UEK2 kernel-uek-2.6.39-200.24.1. The source rpm is in the above location but our public GIT repository will be synced up shortly as well at https://oss.oracle.com/git/?p=linux-uek-2.6.39.git;a=summary. Unlike some others, of course, complete source, complete changelog, complete checkin history, both mainline and our own available. No need to go assemble things from a website manually. Another cool thing coming up is a boot iso for OL6.3 that boots up uek (2.6.39-200.24.1) as install kernel and uses btrfs as the default filesystem for installation. So latest and greatest direct access to btrfs, a modern well-tested, current kernel, freely available. Enjoy. Since it takes a few days for our ISOs to be on http://edelivery.oracle.com/linux, I mirrored them on my own server :http://mirrors.wimmekes.net/pub/OracleLinux/

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  • App installed in ~/usr launches from terminal but not Applications menu (or why does setting ld_library_path in .profile not work as it should)

    - by levesque
    I have built and installed an application under a directory of my choosing, let's say under /home/jim/usr, so files have been put in three-four folders, all under this $HOME/usr folder (e.g., bin, include, lib, share, etc.). I can launch this application from the command line just fine as I added the proper paths to my environement variables PATH and LD_LIBRARY_PATH in ~/.bashrc. I added the same paths to the ~/.profile file, which, if I'm not mistaken, is supposed to be parsed by Ubuntu. Doesn't work. Nothing. Where can I go from there? EDIT: I logged out/in and restarted my computer. Both didn't change a thing. The problem seems to come from the fact that no matter what I do the LD_LIBRARY_PATH environment variable is not properly passed to Ubuntu. Using log files, I found that the application I'm trying to run in this example doesn't find one it's dependencies located in ~/usr/lib. One solution would be to add the /home/jim/usr/lib folder inside a file located in /etc/ld.so.conf.d/, but I don't have admin rights on this machine. Making a wrapper script like this one works: #!/bin/bash export LD_LIBRARY_PATH=$HLOC/usr/lib application &> $HOME/application_messages.log but that would force me to wrap all my home compiled applications with this script. Any ideas? Why does Ubuntu/Gnome remove the LD_LIBRARY_PATH environment variable from my set variables? Is it because trying to do this is bad practice? UPDATE (and solution): As found by Christopher, there is a bug report about this on launchpad. LD_LIBRARY_PATH is unset after parsing of the ~/.profile file. See the bug report. Seems the only solution for now is to make a wrapper script.

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  • MySQL Connector/Net 6.8.1 beta has been released

    - by Roberto Garcia
    Dear MySQL users, MySQL Connector/Net 6.8.1, a new version of the all-managed .NET driver for MySQL has been released. This is a beta release for 6.8.x and it's not recommended for production environments. It is appropriate for use with MySQL server versions 5.0-5.6 It is now available in source and binary form from http://dev.mysql.com/downloads/connector/net/#downloads and mirror sites (note that not all mirror sites may be up to date at this point-if you can't find this version on some mirror, please try again later or choose another download site.) The 6.8.1 version of MySQL Connector/Net has support for Entity Framework 6.0 and includes: - Changed EF migration history table to use a single column as primary key.- Removed installer validation when MySql for Visual Studio is installed.- Added idempotent script for Entity Framework 6 migrations.- Fix for WI #824, Connector/NET writes wrong version for binding redirects.- Fix for WI #825, Connector/NET 6.8.1 writes wrong namespace for binding redirects. The release is available to download at http://dev.mysql.com/downloads/connector/net/#downloads Documentation ------------------------------------- You can view current Connector/Net documentation at http://dev.mysql.com/doc/refman/5.6/en/connector-net.html You can find our team blog at http://blogs.oracle.com/MySQLOnWindows You can also post questions on our forums at http://forums.mysql.com/ Enjoy and thanks for the support! Connector/NET Team

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  • System in low-graphics mode

    - by Artem Moskalev
    I am totally new to Linux, and Ubuntu. I bought ASUS X53E Notebook, erased Windows and installed Ubuntu. First it worked ok. Then when I started working with it, i opened the terminal, entered sudo chmod 666 usr and then all the icons from the main panel disappeared + the whole system stopped responding. I decided to restart the system. When restarted, a message appears: the system is running in low graphics mode and below it: Your screen, graphics card and input device setting could not be detected correctly. You will need to configure it yourself. But the "OK" button is disabled and if I press any buttons nothing happens. If I enter Ctrl-Alt-F2 it opens the bash terminal. But there commands sudo or apt-get are not found and it says that permission denied if i try to enter any folder like cd /usr If I enter the su command it asks for the password I don't know. When encountering this problem first, I reinstalled the whole Ubuntu. but today it happened again just the same. What shall I do? maybe there is something wrong with the hardware? If I need to install another distribution of Linux could you recommend one? but I'd rather stick to Debian releases like Ubuntu. so how do I fix the problem? PS: Please give answers in simple terms because am a newbie so i don't know what goes where yet.

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  • ArchBeat Link-o-Rama Top 10 for November 2, 2012

    - by Bob Rhubart
    ADF Mobile - Login Functionality | Andrejus Baranovskis "The new ADF Mobile approach with native deployment is cool when you want to access phone functionality (camera, email, sms and etc.), also when you want to build mobile applications with advanced UI, " reports Oracle ACE Director Andrejus Baranovskis. Big Data: Running out of Metric System | Andrew McAfee Do very large numbers make your brain hurt? Better stock up on aspirin. According to Andrew McAfee: "It seems safe to say that before the current decade is out we’ll need to convene a 20th conference to come up with some more prefixes for extraordinarily large quantities not to describe intergalactic distances or the amount of energy released by nuclear reactions, but to capture the amount of digital data in the world." Cloud computing will save us from the zombie apocalypse | Cloud Computing - InfoWorld "It's just a matter of time before we migrate our existing IT assets to public cloud systems," says InfoWorld cloud blogger David Linthicum. "Additionally, it's a short window until the dead rise from the grave and attempt to eat our brains." Is is Halloween or something? Thought for the Day "A computer lets you make more mistakes faster than any invention in human history—with the possible exceptions of hand guns and tequila." — Mitch Ratcliffe

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  • (PHP vs Python vs Perl) vs Ruby [closed]

    - by Dr.Kameleon
    OK, here's what : I've programmed in over 20 different languages and now, because of a large project I'm currently working on for Mac OS X (in Objective-C/Cocoa), I need to make a final decision on which language to use for my background scripting + plugin functionality. Definitely, one factor that'll ultimately influence my decision is which one I'm most familiar with, which is PHP (one of the ugliest languages around, which I however adore... lol), then Python / Perl (the "proven values"... )... and then Ruby (which, to me, is almost confusing and I've only played with it for some time.) Now, here's my considerations : (As previously mentioned) Being familiar with it (anyway, if X is better in my case, I really don't mind studying it from scratch...) Speed Good interaction with the Shell + ease of integration with my Cocoa application Btw, some of the reasons that made me wonder if Ruby would be a good choice is : The hype around it (although, I still don't get why; but that's probably just me...) My major competitor (we're actually talking about the same type of software here) is using Ruby for its backend scripting almost exclusively (ok, along with some BASH). Isn't Ruby considered slower e.g. than Perl? Why did he choose that? Simply, a matter of personal taste? So... your thoughts?

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  • What is the advantage to using a factor of 1024 instead of 1000 for disk size units?

    - by Joe Z.
    When considering the disk space of a storage medium, normally the computer or operating system will represent it in terms of powers of 1024 - a kilobyte is 1,024 bytes, a megabyte is 1,048,576 bytes, a gigabyte is 1,073,741,824 bytes, and so on. But I don't see any practical reason why this convention was adopted. Usually when disk size is represented in kilo-, mega-, or giga-bytes, it has to be converted into decimal first. In places where a power-of-two byte count actually matters (like the block size on a file system), the size is given in bytes anyway (e.g. 4096 bytes). Was it just a little aesthetic novelty that computer makers decided to adopt, but storage medium vendors decided to disregard? Whenever you buy a hard drive, there's always a disclaimer nowadays that says "One gigabyte means one billion bytes". It would feel like using the binary definition of "gigabyte" would artificially inflate the byte count of a device, making drive-makers have to pack 1.1 terabytes into a drive in order to have it show up as "1 TB", or to simply pack 1 terabyte in and have it show up as "931 GB" (and most of them do the latter). Some people have decided to use units like "KiB" or "MiB" in favour of "KB" and "MB" in order to distinguish the two. But is there any merit to the binary prefixes in the first place? There's probably a bit of old history I'm not aware of on this topic, and if there is, I'm looking for somebody to explain it. (Apologies if this is in the wrong place. I felt that a question on best practice might belong here, but I have faith that it will be migrated to the right place if it's incorrect.)

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  • Simple Architecture Verification

    - by Jean Carlos Suárez Marranzini
    I just made an architecture for an application with the function of scoring, saving and loading tennis games. The architecture has 2 kinds of elements: components & layers. Components: Standalone elements that can be consumed by other components or by layers. They might also consume functionality from the model/bottom layer. Layers: Software components whose functionality rests on previous layers (except for the model layer). -Layers: -Models: Data and it's behavior. -Controllers: A layer that allows interaction between the views and the models. -Views: The presentation layer for interacting with the user. -Components: -Persistence: Makes sure the game data can be stored away for later retrieval. -Time Machine: Records changes in the game through time so it's possible to navigate the game back and forth. -Settings: Contains the settings that determine how some of the game logic will apply. -Game Engine: Contains all the game logic, which it applies to the game data to determine the path the game should take. This is an image of the architecture (I don't have enough rep to post images): http://i49.tinypic.com/35lt5a9.png The requierements which this architecture should satisfy are the following: Save & load games. Move through game history and see how the scoreboard changes as the game evolves. Tie-breaks must be properly managed. Games must be classified by hit-type. Every point can be modified. Match name and player names must be stored. Game logic must be configurable by the user. I would really appreciate any kind of advice or comments on this architecture. To see if it is well built and makes sense as a whole. I took the idea from this link. http://en.wikipedia.org/wiki/Model%E2%80%93view%E2%80%93controller

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  • How to read default key value with dconf or gsettings?

    - by Zta
    I would like to know the default value of a dconf/gsettings key. My question is a followup of the question below: Where can I get a list of SCHEMA / PATH / KEY to use with gsettings? What I'm trying to do, so create a script that reads all my personal preferences so I can back them up and restore them. I plan to iterate though all keys, like the script above, see what keys have been changed from their default value, and make a note of these, that can be restored later. I see that the dconf-editor display the keys' default value, but I'd very much like to script this. Also, I don't see how parsing the schemas /usr/share/glib-2.0/schemas/ can be automated. Maybe someone can help? gsettings get-default|list-defaults would be nice =) (Geesh, it was much easier in the old days where you just kept your ~/.somethingrc in subversion ... =\ Based on the answer given below, I've updated the script to print schema, key, key's data type, default value, and actual value: #!/bin/bash for schema in $(gsettings list-schemas | sort); do for key in $(gsettings list-keys $schema | sort); do type="$(gsettings range $schema $key | tr "\n" " ")" default="$(XDG_CONFIG_HOME=/tmp/ gsettings get $schema $key | tr "\n" " ")" value="$(gsettings get $schema $key | tr "\n" " ")" echo "$schema :: $key :: $type :: $default :: $value" done done This workaround basically covers what I need. I'll continue working on the backup scrip from here.

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  • Incompatible group permissions in Linux - Is it a bug?

    - by Sachin
    I am on Ubuntu 11.04. I am creating another user and placing an existing user in the group of other user, hoping to write in the home directory of other user. # uname -a Linux vini 2.6.38-11-generic #50-Ubuntu SMP Mon Sep 12 21:18:14 UTC 2011 i686 athlon i386 GNU/Linux # whoami sachin # su root # useradd -m -U foo // create user foo # usermod -a -G foo sachin // add user `sachin' to group `foo' # chmod 770 /home/foo/ # exit # whoami sachin # cd /home/foo/ bash: cd: /home/foo/: Permission denied # groups sachin sachin : sachin foo This is totally weird. Though user sachin is in group foo, and group bits for /home/foo/ is set to rwx, sachin can't chdir to /home/foo/. I am not able to understand this. But, if at the exit step, I switch to sachin user from root, this is what happens: # uname -a Linux vini 2.6.38-11-generic #50-Ubuntu SMP Mon Sep 12 21:18:14 UTC 2011 i686 athlon i386 GNU/Linux # whoami sachin # su root # useradd -m -U foo // create user foo # usermod -a -G foo sachin // add user `sachin' to group `foo' # chmod 770 /home/foo/ # su sachin # whoami sachin # cd /home/foo/ # ls examples.desktop Now, whatever is happening here is totally incomprehensible. Does su sachin inherits some permissions from the root user at this step? Any explanations would be much appreciated.

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