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• Troubleshooting Oracle Java 7 with Firefox

  - by Sampo Smolander

  I run Ubuntu 13.04 with up-to-date Firefox and Oracle Java 7 is installed from the package oracle-java7-installer from the ppa:webupd8team/java PPA. Java doesn't work in Firefox. When I start firefox from the command line, and open a webpage with some java, the java applet doesn't work and in the terminal firefox prints: $ firefox (process:28565): GLib-CRITICAL **: g_slice_set_config: assertion `sys_page_size == 0' failed java.io.IOException: Cannot run program "/usr/lib/jvm/java-7-oracle/jre/bin/java": error=13, Permission denied at java.lang.ProcessBuilder.start(ProcessBuilder.java:1041) at sun.plugin2.jvm.JVMLauncher.start(Unknown Source) at sun.plugin2.main.server.JVMInstance.startImpl(Unknown Source) (and some 20-30 lines more) (I guess the GLib-line can be ignored here.) Also, when I close the tab that contained the java applet, firefox freezes and I have to kill it. However, the permissions look fine: $ ls -l /usr/lib/jvm/java-7-oracle/jre/bin/java -rwxr-xr-x 1 root root 5746 Jul 22 17:35 /usr/lib/jvm/java-7-oracle/jre/bin/java So, what could be wrong here? What to check next? EDIT: Oracle Java is needed for stupid Danske Bank online banking. (You are of course welcome to suggest me to change my bank.)

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• Why old (301) links stay on Google when breaking site down to multiple domains

  - by Sampo Sarrala

  Some background: We did have single site and single domain (let's call it mainsite.com) with product information, however things have changed since and product database has grown fast. So we decided to move some major products/manufacturers under their own domains (let's call one of them subsite.com) while still using our main database/codebase. What we've done: Added subsite.com domain for product 1 by Great Products Co. Some new nice looking front pages, info pages, etc. Detail pages that will use information from original db. Redirected product/group links from mainsite.com using 301 redirect. Verified that redirects works as expected. Waited some time for Google reindexing (over 30 days, I've heard it should be more than enough). Results: If I search our moved products from Google then it will found them and list them but with old links to our main page like mainsite.com/group/product1 but it should show link to new site subsite.com/product1. Links from Goole redirects as they should, as said redirects are verified [301]. Main question: Any reasons why Google would not follow 301 redirects and update links so that they will point to our new mfg/product site subsite.com?

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• Xubuntu 14.04 black screen after monitor off/on

  - by Sampo Smolander

  I have a HP desktop machine with Ubuntu 14.04, with also Xubuntu and Gnome desktops installed. I mostly use the Xubuntu session. When using the Xubuntu session, when I power off my monitor, and power it back on, the screen stays black and I cannot do any work. With ctrl-alt-f6 I can open another virtual terminal, and then the screen works again, but if I to go back to the desktop session with ctrl-alt-f7, all I have is a black screen. But, if I login to Unity (the Ubuntu default session), or to Gnome, and turn the monitor off and back on, everything works ok. Also, if I log out, and while in the lightdm greeter, turn the monitor off and back on, everything works ok. What could be the cause for this, and how to fix this?

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• Prevent udev / uevents looking up DVD at boot time

  - by Sampo

  Problem: Boot time delay caused by udev. Early after initscripts starts there is message saying waiting for uevents to be processed and causing delay on boot, it seems that udev is looking if there is disc in dvd tray. After udev has found disc, boot process continues normally. Main question: How to prevent udev dvd lookup at boot time? Maybe there is some way to skip some udev related stuff and let boot process continue and then later instruct udev to do stuff that may cause some delay (delay in uevents, but not in main boot process, is acceptable after udev is initially loaded).

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• Xorg input devices fail without udev

  - by Sampo

  What I am trying to do: Launch Xorg server without udev device manager. What I have tried to do: Make sure that /dev/ has all required nodes, such as /dev/input/*. Make sure that all required kernel modules are loaded. Launch Xorg. What happens: Xorg starts up as excepted. Xorg loads correct GPU driver and sets right screen resolution. Xorg blocks all input devices (keyboard, mouse), Alt+F[1-12] does not work (can't go back to tty1). Unraw'ing keyboard to take its control from X removes blocking and after unraw I can Alt+F1 back to tty1. Xorg still does not handle any input. Why I think that it should work: Same configuration works well if udev is loaded. Loading udev does not add or modify /dev/ contents, all nodes stays same. My main question is: How to make Xorg input devices work without udev? Any additional information about how Xorg really uses/detects/grabs keyboard would be helpful. And any additional information about what udev really does (other than populating /dev/) would also be helpful.

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• How to distill / rasterize a PDF in Linux

  - by Sampo

  We have a printer at our office that prints PDF files from a USB stick. It prints most files okay, but it has problems with some, especially ones generated with Latex. Some PDFs it simply refuses to print, some PDFs it prints with courier-type font, and some it prints fine except for equations. I'm looking for a way to "distill" PDFs into a dead-sure format to print. Either by simplifying / normalizing the PDF to the point that any renderer will render it correctly, or by simply making each page a 600dpi raster image in the PDF. (I could split the PDF into individual raster images and combine them manually, but I want something scriptable.) The output file size doesn't matter, as long as it's sure to print, has A4 paper size (or the original) and 300~600dpi resolution.

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• Windows file association for README, INSTALL, LICENSE and the like [closed]

  - by Lumi

  Possible Duplicate: How to set the default program for opening files without an extension in Windows? Many files originating in the UNIX world come without file extension. Popular examples include README, INSTALL, LICENSE. We know for a fact that these are text files. It is therefore a bit disappointing not to be able to just double-click them open in Explorer and see them in Notepad (actually, Notepad2 because of the UNIX line endings which silly Microsoft Notepad doesn't render correctly). Does anyone know of a way to create a file association for, say, README files without extension? This could then be replicated to cover the most frequently occurring file types, and then double-clicking them open would work. Update (Sort of in response to all your comments.) Thanks, folks, your comments and answers have helped me. @Indrek, yes, I was under the assumption that you could somehow create an association for just README or Makefile, and couldn't do so for files without extension. Turns out the contrary is true, and yes, that is a workaround that neatly solves the issue. Ultimately, I just want to be able to double-click to open a README or Makefile, that's all. @Sampo, the SendMe trick is also useful, although usability is not as great as a straight double-click. (I'm really lazy sometimes.) Turns out the following trick using ftype and ftype from an Administrator prompt does the double-click enabling job: assoc .=no_ext ftype no_ext=%SystemRoot%\system32\NOTEPAD.EXE %1 :: You can see it created some entries in the registry: reg query hkcr\no_ext /s reg query hkcr\. /s

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