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• Can I mark a folder as mountpoint-only?

  - by Collin

  I have a folder ~/nas which I usually use sshfs to mount a network drive on. Today, I didn't realize the share hadn't been mounted yet, and copied some data into it. It took me a bit to realize that I'd just copied data into my own local drive rather than the network share. Is there some way to mark in the system that this folder is supposed to be a mount point, and to not let anyone copy data into it? I tried the permissions solution here: How to only allow a program to write to a directory if it is mounted?, but if I don't have write access I also can't mount anything to it.

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• Automatic Site Creation

  - by Eddy Freeman

  I have created a platform that i want users to sign up and a new site is created for them instantly. Users will register and afterwards they will receive a username and password for their personal site. The system will work like ecommerce platforms such as www.shopify.com, www.bigcommerce.com, etc.. where users sign up and a new web-shop is created for them instantly. I have been searching for a while how i can create a script to automate this task but couldn't find any tutorials. Am using LAMP (Linux, Apache, MySql and PHP). Am asking if someone can guide me how to write such script or maybe point me to a tutorial or a book or probably similar scripts to automate this task. Sorry if this place is wrong for this question. thanks for your help.

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• What could be causing frequent display freezes?

  - by austen

  I just installed Ubuntu 14.04 two days ago (coming from Win8) and in the two days that I've been using it, my display has frozen four or five times. The mouse won't move but the keyboard does respond so I can use the Ctrl+Alt+Bkspc command to fix it. It seems like it might just be the display freezing because one of the times I was watching a Youtube video and the audio continued playing. I have an Nvidia graphics card with the most recent Nvidia drivers for it enabled. I see that a lot of questions about Ubuntu freezing get marked as a duplicate and pretty much always linked back to a thread about what to do when it freezes. Clearly, I've got that bit figured out already and I did read that thread for further advice. What I'm looking for though is how to fix this permanently. output from lspci -nnk | grep -iA2 VGA: 00:02.0 VGA compatible controller [0300]: Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09) Subsystem: Lenovo Device [17aa:2200] Kernel driver in use: i915 Update: JohnnyEnglish pointed out that Ubuntu is using the integrated graphics, not my Nvidia card. It turns out my laptop uses Nvidia Optimus and I cannot enable only the graphics card through the BIOS. I found out about Nvidia Prime and got it set up using this article. The settings panel which allows you to select the graphics says that 'performance mode' is enabled but when I check which graphics controller is enabled through the terminal, it still says it's using the integrated graphics. I'm not sure if this could be causing the freezes but I guess it's a starting point. Any ideas on how to resolve this?

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• SFTP permission denied on files owned by www-data

  - by Charles Roper

  I have a pretty standard server set up running Apache and PHP. An app I am running creates files and these are owned by the Apache user www-data. Files that I upload via SFTP are owned by my own user charlesr. All files are part of the www-data group. My problem is that I cannot modify or overwrite any of the files via SFTP which are owned by www-data, even though charlesr is part of the www-data group. I can modify the files no problem via a SSH session. So I'm not sure what to do. How do I give my SFTP session permissions to modify www-data owned files? For a bit of background, these are the notes I wrote for myself when setting-up the server: Now set up permissions on `/var/www` where your files are served from by default: $ sudo adduser $USER www-data $ sudo chgrp -R www-data /var/www $ sudo chmod -R g+rw /var/www $ sudo chmod -R g+s /var/www Now log out and log in again to make the changes take hold. The previous set of commands does the following: 1. adds the current user ($USER) to the `www-data` group; 2. changes `/var/www` to belong to the `www-data` group; 3. adds read/write permissions to the group that `/var/www` belongs to; 4. sets the SGID bit on `/var/www`; this final point bears some explaining. And then I go on to explain to myself what setting the SGID bit means (i.e. all files created in /var/www become part of the www-data group automatically). Btw, nothing feels sweeter than going back and reading your own detailed notes on the what, how and why of your own server set up when trying to troubleshoot like this - I recommend it highly to all beginners like myself :-)

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• Ideas for home media server with Dell laptop?

  - by Warlax

  Hi guys, We have an old Dell Inspiron laptop we don't use anymore and would look to turn it onto a media/backup server for music/pictures - and maybe documents/code. The laptop only has 40Gb of HD space but we can hook to it a USB external HD with an additional 80Gb. This is a very general question: - What OS should I put on it (more like, what flavor of Linux)? - What media/backup server software should I install on top of that? - How would you go about backing up to it? I need to back up computers on the same LAN, some have Windows, some OS X, some Linux. If you could point me to an all-in-one solution with a nice tutorial for non-sysadmin folks it would be greatly appreciated, thank you!!!

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• Koans, now available in Python flavor

  - by Greg Malcolm

  Recently a Python developer friend with whom I was pair programming with suggested that I show him how to write a little Ruby. I responded by telling him to check out Ruby Koans as a starting point. However I wanted to try that in reverse at the same time with me learning some Python. I did a bit of googling, and sure enough someone had started writing some Python Koans. It just needed finishing... So, a few weeks later Python Koans is now complete and ready for action! It is available through Mercurial on Bitbucket: http://bitbucket.org/gregmalcolm/python_koans/wiki/Home It is also mirrored on Github: http://wiki.github.com/gregmalcolm/python_koans/ Converting it was fairly easy. Aside from the differing philosophical approaches behind the two languages, Ruby and Python are fairly similar. We had to come up with completely new material for a few subjects like multiple inheritance and decorators, but for most features in Ruby there is something roughly comparable in Python. I highly recommend writing tests (or koans) as a means to lean a new language or framework. I've learned a lot from doing this.

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• A Simple Solution For NetBeans RCP Apps That Need A Groovy Editor

  - by Geertjan

  Take a look at Nils Hoffmann's metabolomic analyzer, especially at the Groovy editor contained within it: Obviously, it would be cool if the Groovy editor in the app above were to have syntax coloring and other editor features helpful in coding Groovy. However, as I showed in If You Include the Groovy Editor, there are multiple dependencies that the NetBeans Groovy support has on other modules that would be completely superfluous in the above application, while they'd make the app much heavier than it is, simply because of all the Groovy dependencies. But today I thought of a simple solution. Why not take the Groovy.g file (i.e., the ANTLR definition), such as this one [though that's probably not the most up to date one, wondering how to find the most up to date one] and then apply the content of this screencast (made by me) to the Groovy.g file: Within a few minutes, you should end up with Groovy syntax coloring. OK, so that's not a full blown Groovy editor, but syntax coloring is surely a cool thing to have in the app with which this blog entry started? Sure, this means creating a new Groovy editor from scratch. But the point is that doing so can be very simple, i.e., the syntax coloring can simply be generated via the simple instructions above. I'm going to try it myself in the next few days, but would be cool if others out there would try this too!

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• tradeoffs of iSCSI vs. AFP when using Time Machine with a NAS?

  - by Ajit George

  I'm setting up a home NAS device (Synology DS409) that I'm planning to use for Time Machine backups (amongst other things). What are the tradeoffs between using iSCSI or AFP to mount the backup volume? The Synology wiki suggests that iSCSI is better if the Mac will be frequently disconnected from the network or sleeping, from the point of view of the volume automatically remounting. What about filesystem consistency? Given that unplugging a USB drive without properly unmounting it often requires the Time Machine volume to be repaired, would iSCSI have the same issues?

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• Bright Minds in Singapore: Oracle Graduate Hiring

  - by user769227

   Last week I was in Singapore and had the opportunity to take part in our graduate interviewing that we are currently undertaking as part of our ASEAN hiring. I always feel fortunate to get the chance to meet and talk with students in the APAC region and taking time to meet some of the students we interviewed in Singapore last week is no exception. The excitement and enthusiasm of many of the students that I spoke to last week really stands out but what really brought some of them to the forefront for me was their creative ways of thinking and the level of professionalism that I saw in the students. Some of the presentation and communication skills that I saw displayed would rival experienced IT Consultants in the industry.  We still have more interviews to follow up from last week, but I am confident that of the students we had the chance to meet last week some of them will go on to have bright and successful careers here at Oracle.  To all the students that came in and spent the day with us, I want to thank you for giving us your time and for sharing your thoughts and ideas with us. From a business perspective I think you all will go on and do great things and from a personal stand point I enjoyed many of the conversations I had and feel lucky to meet with you. Best of luck with the remainder of your interviews and I hope to see some of you in the halls on my next visit to Singapore.

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• Pointing Domain to VDS Directory

  - by Jonathan Sampson

  I've got a domain name that is managed through 000Domains.com. I also have a virtual dedicated server hosted with GoDaddy.com. Within my VDS, I created a folder /mysite and placed all of my website files there. I can test this through the ipaddress of my VDS, but I would now like to point my domain from 000Domains over to my sub-directory hosted on GoDaddy. How do I do this? Do I need to make any specific modifications to my VDS to inform it that one of the directories will be accessible from a domain name? I have access to Simple Control Panel, if that is of any relevance.

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• Mobile cross-platform SDK for computationally intensive apps

  - by K.Steff

  I am aware of the PhoneGap toolkit for creating mobile applications for virtually all mobile platforms with a significant market share. However, the code in PhoneGap that is shared between the different platforms is written in JavaScript. While I like JS, I think it's hardly appropriate for computationally intensive tasks. The situation with Titanium is pretty much the same. So, is there any way that I can create a cross-platform mobile app that has the computationally intensive code shared between the platforms? Some context: Obviously, I don't want to implement the time consuming algorithm in many different languages, since this violates DRY, increases the chance for bugs slipping in at least one version and require boilerplate code to work. I've looked at Xamarin's MonoTouch and Mono for Android tools, but while they cover iOS and Android, they're not nearly as versatile for deployment as PhoneGap. On the other hand, (IMO) the statically typed nature of C# is more suited for intense computation than JS. Are there any other SDK/tools appropriate for the task that I don't know about or a point about the mentioned above that I've missed? Also, uploading data to a web service for processing is not an option, because of the traffic required.

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• Help in decide the partition to install ubuntu

  - by G.Ashwin kumar

  I have a PC running with windows 7 ultimate 64 bit version with 4 gig Ram. I have a 320 gig hard disk , in which I have allocated 120 gig for windows 7, 100 gig for NY files(named ashwin in windows) and rest 80-90 gig partitioned but empty NTFS partition.Now where do I install Ubuntu so that windows and data is safe. I got the option install with windows I selected it , it then shows select drive(SCSI1 (0,0,0) (sda) -320.1 GB ATA WDC WD3200AAJS-6) and allocate driver by dragging the divider below which shows 66.5gb and 59.3 GB respectively. Which one do I go with? I clicked advance partitioning it shows five devices: device , type, m.point ,size.(mb), used(mb)......... /dev/sda1, NTFS, 104 , 35 (windows 7 loader) /dev/sda2, NTFS, 104752, 23604 /dev/sda3, NTFS, 125829, 10161 /dev/sda5, NTFS, 89382, 3221 when I checked size in properties it showed name of drive according to windows, used.Gb, free, total. ashwin, 10.2, 115.7, 125.8 c drive, 23.6, 81.1, 104.8 new volume, 92.6mb, 89.3, 89.4 except mentioned everything in gigabytes.ignore the last dots. I want to install it in new volume or using that space how do I do it? Explain in detail I'm a beginner.

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• Outlook 2010 exchange setup prompts for [email protected] rather than [email protected]

  - by Force Flow

  We use a hosted exchange service. When users want to set up Outlook 2010 to access their account, they open Outlook and run through the configuration steps. Autodiscover is enabled, and in the user's active directory profile, their email address is in the email field. However, when the configuration process reaches a point where they are prompted for their email account's username and password, their active directory username is filled in by default instead of their email address. Is there a way to fix that? Users get confused and try to enter their email password over and over again and wonder why it doesn't work (and completely miss/ignore the "use another account" button even though they have instructions right in front of them). I'm also using the Office 2010 ADM's in group policy, but I haven't yet seen an option to specify what gets auto-populated in that windows security prompt.

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• Order in which passphrase is asked for encrypted volumes

  - by Lars Kotthoff

  I have installed 12.10 on a machine with two disks. The root partition is on one disk, the swap partition on the other. Both disks are encrypted and I have added the corresponding entries to /etc/crypttab. During boot, it asks for the passphrase for the disk with the root filesystem. Then it continues booting and gets to the login screen before I get a chance to enter the passphrase for the other disk. After logging in, I verified that it was actually waiting for me to enter the passphrase for that second partition (askpass process is running). But at that point, I have no way of entering the passphrase anymore. The manpage for crypttab suggests that the order in which the volumes are specified matters, so I changed it to have the swap disk first. I updated the initramfs and grub afterwards, but it didn't make any difference. How can I specify the order in which the encrypted partitions are unlocked? I'm looking for a solution that either asks for the swap passphrase first or tells the system to wait until all encrypted partitions are unlocked before displaying the login screen.

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• Application to store/browse/view photos?

  - by amorfis

  I am looking for application which I can install on Ubuntu server and put my photos there. It can be by web interface, it can be by mounted samba disk. What I require: Ability to add tags to photos. Ability to move photos. I.e. if I set photos directory to /home/photos, but then I want to move all photos to e.g. /home/common/photos - I don't want to lose all the tags. I used to use FSpot and it was great, but it lacked point 2, and I lost everything :(

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• VPS DNS Resolution problem

  - by fatnic

  Hi. I've recently moved from a shared hosting to a VPS at vps.net but I think I might have broken it already! I have domain.com and domain.net. I have setup DNS records for both to point to my server. However, only domain.com pings to the correct IP address. domain.net is pointing to a different IP address. Possibly the old server it was pointing to. This has now been deleted. Is there possibly any way to correct this without having to submit a ticket to VPS.net?

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• MWS2K8R2: Enabling Media Sharing using Streaming Media Services Role

  - by TheLizardKing

  So I have a Microsoft Windows Server 2008 R2 that stores a large collection of media (mostly mp3s) and I want to be able to deliver these files using a server/client setup with Windows Media Player being the client. I downloaded and installed Streaming Media Services Role. I even setup a publishing point with on-demand access. My issue is I can connect using WMP12 but it only connects as more of a stream and not a shared library. I can pause/play/skip as if it's a powerful radio station which is ok in my book but what I'd really like to do is allow me to control my music remotely, search and play for artists, maybe create playlists (not required but nice) and even connect it to an xbox. Is Streaming Media Services Role not what I should be using for this? Would installing WMP and sharing using that mechanism be a better option? Any Ideas?

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• Unable to log into Windows XP Pro Domain Not Available

  - by Belliez

  Trying to access an old laptop I have but at the windows login screen I attempt to log in and get the message "Unable to log in because is unavailable". This laptop is not on a domain or a network and I do not know the computer name. I have blanked the passwords of the local administrator and user account using Offline NT Password and Registry Editor but still unable to log in? Any advice would be grateful or if you can point me to the registry location I can edit or delete to remove the domain. Thanks

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• Lockup when unlocking screen saver

  - by chris

  I've had this happen a couple of times - screen saver kicks in, locks the screen, and when I put my password in to unlock it the system just seems to hang. Cursor turns to the busy, HDD light flickers occasionally, but the only thing I can do at that point is power down. This is on a desktop, not a laptop and according to the bios all the power saving is turned off. Has anyone else seen this? Is there a way to prevent it, or at least diagnose the cause?

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• Do I need a ssl certificate if just pointing my domain to Cloudfront?

  - by hashpipe

  I have a website running on a domain (e.g site.com). I have an additional domain(e.g sitecdn.com) which basically points to Amazon Cloudfront for delivery. Amazon Cloudfront in turn basically fetches the data from the main domain (site.com). I use this setup primarily to have multiple subdomains of my sitecdn.com to point to assets via the cdn. The main website has a ssl certificate, and I intend to put all assets served from the cdn as https links only. Something like <img src="https://img.sitecdn.com/image.jpg" /> I'm a little confused whether I need a ssl for my cdn domain. In cloudfront I can set the setting to allow both https and http traffic. Do I need a ssl certificate for this ? If yes, then where do I install the ssl certificate, since I don't have a server for sitecdn.com.

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• How to set up a wireless AP with a linux box and SOCKS proxy

  - by user50455

  I've got: (1) Linux box (Arch linux to be precise, but that doesn't really matter) (2) Ethernet connection on it (say, eth0) (3) Socks proxy on a remote site (say, remote :port), which can be accessed through (2) (4) Wireless card on local linux box (say, eth1) So, the task is: create a wireless access point using (4) on local site (1) in such a way that all connections from it will go through proxy (3). E.g., when one simply connects to that AP (well, there should be DHCP or something for that) and goes to serverfault.com, all the traffic goes through that SOCKS proxy. I'm just asking for the digging direction and some references, not step-by-step tutorial. Thanks in advance

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• Windows/Samba connection error

  - by Gomibushi

  I have a Linux fileserver serving up /home for linux and windows users. I was able to connect from my windows client, but not from a DC. Then suddenly I could connect from the DC too. The linux servers run Centrify clients, and as such are part of the domain. All on same subnet. This is what the the log.smbd says, repeatedly: [2010/02/11 11:25:57, 0] lib/util_sock.c:read_data(534) read_data: read failure for 4 bytes to client 192.168.200.3. Error = Connection reset by peer On Windows it appeared as an "unknown error". EDIT: the error code is "0x80004005". We are developing a system depended on the samba share, and are worried this will appear again. It would be nice to pin point the root of this. Any ideas what this might be? Places to look?

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• How to fix White Screen of Death after updating iTunes?

  - by cust0s

  The other night I updated my iTunes to the latest version (through Software Update) when I came to turn on my computer I was greeted with the dreaded white screen of death. I use an early 2008 iMac 24". I've tried the basic things, unplugging/turning off accessories, trying to boot from the install disk, reseting pram, etc, etc. Still no luck and no change what-so-ever. All I've been able to ascertain that my keyboard still works (by ejecting). I should point out that I did recently replace my Hard drive with a Western Digital Black 500GB (though the computer is well out of warrenty) and I'm a little concerned that the problem could be the screen.

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• Running remotely an app from a shared folder with PsExec

  - by Stephane

  I am actually not sure that this is possible. let's see: I have a script that runs on a Build server. Let's name this server A. It drops the bins to a shared folder on server B. And I want to run the program on server C. So using caspol I can allow the executable to be ran remotely. that means from B I can run \C\shared\my.exe What I want to do is from A run \C\shared\my.exe on B. SysInternals\PsExec.exe -u username -p password -accepteula \\ServerC -i 0 -d -w \\ServerB\Nightly\Server \\ServerB\Nightly\Server\server.exe The user has all the necessary rights. But, the -w (working directory) options apparently wants a path relative to the server I point to. Any idea?

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• SJS AS 9.1 U2 (GF v2 U2) - Patch 25 // GF v2.1 - Patch 19 // Sun GlassFish Enterprise Server v2.1.1 Patch 13

  - by arungupta

  SJS AS 9.1 U2 (GF v2 U2) patch 25 is a commercial (Restricted) patch (see Overview of GFv2) available as part of Oracle's Commercial Support for GlassFish. This release is also patch 19 of GlassFish 2.1 and patch 13 of GlassFish 2.1.1. The file-based patches were released onSep 1, 2011; package-based patches were released on Sep 13, 2011. Release Overview Description SJS AS 9.1 U2 (GFv2 U2) - Patch 25 - File and Package-Based Patch for Solaris SPARC, Solaris x86, Linux, Windows and AIX. GlassFish 2.1 - Patch 19 - File and Package-Based Patch for Solaris SPARC, Solaris x86, Linux, Windows and AIX. GlassFish 2.1.1 - Patch 13 - File and Package-Based Patch for Solaris SPARC, Solaris x86, Linux, Windows and AIX. Patch Ids This release comes in 3 different variants: Package-based patches with HADB • Solaris SPARC - [128640-27] • Solarix i586 - [128641-27] • Linux RPM - [128642-27] File-based patches with HADB • Solaris SPARC - [128643-27] • Solaris i586 - [128644-27] • Linux - [128645-27] • Windows - [128646-27] File based patches without HADB • Solaris SPARC - [128647-27] • Solaris i586 - [128648-27] • Linux - [128649-27] • Windows - [128650-27] • AIX - [137916-27] Update Date Nov 23, 2011 Comment Commercial (for-fee) release with regular bug fixes. This is patch 25 for SJS AS 9.1 U2; it is also patch 19 for GlassFish v2.1 and patch 13 for GlassFish v2.1.1. It contains the fixes from the previous patches plus fixes for 18 unique defects. Status CURRENT Bugs Fixed in this Patch: • [12823919]: RESPONSE BYTECHUNK FLUSH WILL GENERATE A MIMEHEADER WHEN SESSION REPLICATION ON • [12818767]: INTEGRATE NEW GRIZZLY 1.0.40 • [12807660]: BUILD, STAGE AND INTEGRATING HADB • [12807643]: INTEGRATE MQ 4.4 U2 P4 • [12802648]: GLASSFISH BUILD FAILED DUE TO METRO INTEGRATION • [12799002]: JNDI RESOURCE NOT ENABLED IF TARGETTING USING ADMIN GUI ON GF 2.1.1 PATCH 11 • [12794672]: ORG.APACHE.JASPER.RUNTIME.BODYCONTENTIMPL DOES NOT COMPACT CB BUFFER • [12772029]: BUG 12308270 - NEED HOTFIX FROM GF RUNNING OPENSSO • [12749346]: VERSION CHANGES FOR GLASSFISH V2.1.1 PATCH 13 • [12749151]: INTEGRATING METRO 1.6.1-B01 INTO GF 2.1.1 P13 • [12719221]: PORTUNIFICATION WSTCPPROTOCOLFINDER.FIND NULLPOINTEREXCEPTION THROWN • [12695620]: HADB: LOGBUFFERSIZE CALCULATED INCORRECTLY FOR VALUES 120 MB AND THE MEMORY FO • [12687345]: ENVIRONMENT VARIABLE PARSING FOR SUN_APPSVR_NOBACKUP CAN FAIL DEPENDING ENV VARS • [12547651]: GLASSFISH DISPLAY BUG • [12359965]: GEREQUESTURI RETURNS URI WITH NULL PREPENDED INTERMITTENT AFTER UPGRADE • [12308270]: SUNBT7020210 ENHANCE JAXRPC SOAP RESPONSE USE PREVIOUS CONFIGURED NAMESPACE PREF • [12308003]: SUNBT7018895 FAILURE TO DEPLOY OR RUN WEBSERVICE AFTER UPDATING TO GF 2.1.1 P07 • [12246256]: SUNBT6739013 [RN]GLASSFISH/SUN APPLICATION INSTALLER CRASHES ON LINUX Additional Notes: More details about these bugs can be found at My Oracle Support.

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