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  • On clients use generic driver for printer shared by CUPS

    - by Daniel
    I know this worked really easy with a recent CUPS version some years ago. Unfortunately I fail to do the following with latest CUPS nowadays. How to share a printer without using printer specific drivers on the clients with CUPS? The printer is a Samsung ML-2010. The important fact is that it needs a quite specific library for printing called splix. That is installed on the server and prints well. What makes trouble is using that printer over the network. I found out how to use Avahi under Linux to make use of DNSSD to advertise and discover printers. But as far as I understand the new CUPS offers the internal driver interface on the network. This has 2 major issues: anybody can fiddle with the driver and I don't trust any uncommon printer library to be "network secure" anyone who wants to use my printer including guests needs to install the specific drivers first I remember the old days when I could enable "Share this printer" on the CUPS server and all clients would magically detect the printer and just send their job data to the server and have it do the driver stuff. After everything a read I guess this is related to the changes Apple introduced with CUPS including dropping of the integrated network discovery protocol. If it helps: Server: Ubuntu LTS 12.04 Server with CUPS 1.5.3 Client: Arch Linux with current CUPS 1.6.1 On another box with Ubuntu the printer was setup automatically at least but the mechanism used the Splix library for that.

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  • logfile deleted on Oracle database how to re-create it?

    - by Daniel
    for my database assignment we were looking into 'database corruption' and I was asked to delete the second redo log file which I have done with the command: rm log02a.rdo this was in the $HOME/ORADATA/u03 directory. Now I started up my database using startup pfile=$PFILE nomount then I mounted it using the command alter database mount; now when I try to open it alter database open; it gives me the error: ORA-03113: end-of-file on communication channel Process ID: 22125 Session ID: 25 Serial number: 1 I am assuming this is because the second redo log file is missing. There is still log01a.rdo, but not the one I have deleted. How can I go about recovering this now so that I can open my database again? I have looked into the database created scripts, and it specified the log02a.rdo file to be size 10M and part of group 2. If I do select group#, member from v$logfile; I get: 1 /oradata/student_db/user06/ORADATA/u03/log01a.rdo 2 /oradata/student_db/user06/ORADATA/u03/log02a.rdo 3 /oradata/student_db/user06/ORADATA/u03/log03a.rdo 4 /oradata/student_db/user06/ORADATA/u03/log04a.rdo So it is part of group 2. If I try to add the log02a.rdo file again "already part of the database". If I drop group 2 and then add it again with these commands: ALTER DATABASE ADD LOGFILE GROUP 2 ('$HOME/ORADATA/u03/log02a.rdo') SIZE 10M; Nothing. Supposedly alters the database, but it still won't start up. Any ideas what I can do to re-create this and be able to open my database again?

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  • Why are PNG-8 files mangled when opened in Photoshop?

    - by Daniel Beardsley
    Why are some 32 bit PNGs opened in Photoshop with Indexed Colors and no transparency? For instance, I grabbed a png icon file of the Stack Overflow logo at: http://blog.stackoverflow.com/wp-content/uploads/icon-so.png When opening it in Photoshop CS3, it apparently treats it as indexed color and gets rid of the alpha channel. The image on the right is a screen grab of the icon. Changing the Image mode in Photoshop to RGB doesn't change the image at all. I've tried this with a few other PNGs and it seems hit or miss. When viewed in other programs, it displays fine. left:png opened in Photoshop, right:screen grab of png from browser What gives?, does Photoshop not interpret the PNG file format correctly?

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  • Windows 7 - Can't get my TV working as primary display with nVidia 7900GS

    - by Daniel Schaffer
    I just installed Windows 7 Ultimate 64 RTM (from MSDN) on my HTPC, which is connected to a 42" Magnavox LCD TV via component cables to my nVidia 7900GS. Everything was fine through the installation until I went to install the official driver from nVidia. Towards the end of the installation, the TV blinked off and wouldn't come back on. I went and got an LCD monitor and plugged it into a DVI port and the monitor came right up, but was automatically selected as the primary display. Now, if I set the TV to be the primary display, the TV just blanks until I hit escape to cancel the "settings have changed, do you want to keep them" dialog. Any suggestions? Update: I'm able to set the TV as the primary display using the Windows 7 "screen resolution" configuration panel. However, if I try to remove the LCD monitor either by unplugging it or using the configuration, the TV blanks out again. Update 2: This setup was working correctly in Vista Home Premium 32-bit. Update 3: I've uninstalled the nVidia driver and am using the driver that Windows Update installed. As much as this offends my geek sensibilities (must use the "right" driver!!), well, It Works™.

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  • Is paravirtualization evil?

    - by Daniel
    I have an VMWare ESX Server v3.5 with a few virtualized Debian Lenny VMs (kernel 2.6.22 with vmi) running Apache Tomcat 5.5. I enabled paravirtualization, and Disk IO increased from about 240MB/s to 380MB/s, making me a happy admin. The problem now is that my apache tomcat becomes deadlocked during startup, running with 200% CPU (I have 2 CPUS assigned to the VM), and don't know how to get both: A stable system and a fast system. I somewhere heared that paravirtualization is legacy anyway and won't be available on newer ESX servers. Is there a replacement for this seemingly performance-improving option, or is it discontinued becauses it is just unstable? What is the state of paravirtualization? Should I ignore it completely? Thanks for all answers in advance.

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  • Serious 64-bit laptop

    - by Daniel Gehriger
    For the past couple of years, I have been using an IBM Thinkpad T60p for daily work (software development, desktop & embedded). I am extremely satisfied with this machine, due to its robustness. It also has a few features I depend on: a high resolution display: 15.0" TFT FlexView display with 1600x1200 (UXGA); excellent keyboard; decent graphics and CPU performance. Some of the software I develop benefits from larger amounts of RAM, and 3GB (Windows 7 32-bit) or 4GB (Windows 7 64-bit on T60p) are no longer sufficient. My customers run desktop computers with 20GB and more, and I need to have at least 8GB to at least be able to run reasonable test cases. So I'm shopping around for a new laptop, but I'm struggling to find anything that matches my requirements: must run Windows 7 64-bit Pro or higher; must support at least 8GB of RAM (more is better) high screen resolution! While I prefer 4:3 I can live with wide screen. But I really hope to find something with a vertical screen resolution similar to what I have now... portable, so < 16" but = 14" I realize that FlexView isn't available anymore, but I'd like to avoid a glossy screen if possible. decent (not more) graphics performance, ideally hybrid (I'm doing a lot of CAD, never games). good keyboard reasonable CPU -- but I'm still fine with my current Core 2 Duo, so that shouldn't be too complicated. The T60p fits all those requirements, except the 8GB of RAM. Can you help me find a current notebook that would match most of them? I don't mind changing brand. Thanks!

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  • Mac failing (failed?) hard drive - is all hope lost?

    - by Daniel
    It's a 500 GB Seagate laptop hard drive that came with my Macbook Pro. Apple partition format. Already replaced and now have it external, connected via SATA/USB adapter. Trying to get just a few files that I worked on while out of town when it crashed (and thus did not have my time machine backup drive). Drive will not mount, but OS X Disk Utility detects it and can read the capacity, model number, and even the name of the partition, which leads me to believe all hope may not be lost. Failed attempts so far: Disk Utility verify+repair says drive cannot be repaired and that I should back up immediately (lovely) Disk Warrior says it cannot rebuild the directory due to hardware failure Data Rescue quick & deep scans immediately failed PhotoRec says "error reading sector" for every sector (at least for the few minutes I let it run before closing it to explore other options) What else can I try here? Again, I'm just looking for a few, small files (python scripts to be specific) - not a full recovery.

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  • MS Windows issue - "Filename or extension is too long"

    - by Daniel
    I run Microsoft windows on a few of my machines. I don't know if many people know about this issue in the OS but you can't have very long filenames, from what I know Linux can have longer names, I have never run into this issue on my Linux machines. Anyway I run into issues whenever copying folders & files to backup drives. I manually backup of my data, finding and changing names of files, this is very very tedious. Is there a software tool to shorten folders or filenames that are found to be to long on Windows? I have drive image duplication software which does the job but in a way that I don't like, plus moving files can become a hassle at times if the names are too long to copy.

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  • Apache Balancing by source IP

    - by Daniel
    I am using Apache's Proxy Balancer to balance one sub domain (e.g. subdomain.domain.com) to an application which is located on 2 servers. Here an extract from my Apache configuration file: <Proxy *> Order deny,allow Allow from all </Proxy> <Proxy balancer://cluster1> BalancerMember http://server1:28081 route=w1 BalancerMember http://server2:28082 route=w2 </Proxy> ProxyPass /path balancer://cluster1/path ProxyPassReverse /path balancer://cluster1/path My question is, if it's possible to decide with the source IP-address which BalancerMember should be used for the request? To e.g. Requests from 1.2.3.4 to Member 1?

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  • Determine display or VNC session based on PID

    - by Daniel Kessler
    I frequently VNC into a server where we run many concurrent computationally intensive matlab processes. Sometimes, one of my processes misbehave, which I can see from top, but I have a hard time figuring out which VNC session it's running on, or more specifically, which display it's running on. Suppose I see that PID 8536 looks like a resource hog, and I want to investigate. Because it's a matlab session, I know there is likely an IDE open somewhere, and I want to check to see if anything important is happening before I kill it. We've solved this somewhat awkwardly in the past by identifying which PTY 8536 was launched from, then looking at a process tree to figure out things launched in that context, scrolling up, and seeing the VNC initialization. Seems like there must be a better way to go PID - X Display (or VNC Session).

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  • How to restrict Windows 7 internet data usage while using mobile connection?

    - by Daniel Gehriger
    When I'm travelling I would like to use my iPhone's mobile hotspot feature to provide Internet access for my Windows 7 laptop. However, my mobile data plan has a limit on the amount of data I can use per month, and I would like to restrict Internet access to a few very specific applications (such as a database administration tool and Chrome). Is it possible to create a firewall profile for use with mobile data access? If not, what tools exist that could assist me?

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  • share git rep access on unix machine with ssh

    - by Daniel
    at my school we have a student unix server with our accounts. i have installed git on my account, created a repository, and created the acl permissions on the folder repository so other users can access the repository # file: tp1 # owner: my_account # group: groupxxx user::rwx user:friend_account:rwx group::--- mask::rwx other::--- default:user::rwx default:user:friend_account:rwx default:group::--- default:mask::rwx default:other::--- but friend_account cant even cd to my tp1 directory (permission denied), so i think the problem should be in unix acl permissions..

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  • iTunes video black screen until select computer output

    - by Daniel Huckstep
    I don't remember this happening before, but now whenever I play any video in iTunes (podcast video, movie, TV show, iTunes extras stuff but the menus work) it just shows a black screen with the sound playing. If I stop it, select "Computer" in the little output control on the iTunes video control panel that pops up, then play again, it works fine. What the heck? Tried rebooting, updating, with and without external monitor. OSX 10.6.6

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  • How do I configure the Google Chrome / Chromium address bar to perform a search instead of trying to access a file on the local file system?

    - by Daniel Kauffman
    How do I configure the Google Chrome / Chromium address bar to perform a search instead of trying to access a file on the local file system? I would like to be able to enter a file name in the address bar and to see Google search results for that file name similar to what I would see if I searched for the file name using something like https://www.google.com/#q=/path/to/interesting/file I am able to disable the file scheme using either of the following policy settings: "DisabledSchemes": ["file"], Which has been deprecated in favor of: "URLBlacklist": ["file://"], But in either case Google Chrome / Chromium continues to auto-detect that a file name was entered, automatically prepends the file scheme to the file name, and then reports that the webpage is blocked.

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  • PHP Requests Being Blocked After Making About 25 in Ten Minutes

    - by Daniel Stern
    We have an administrative portal where we run PHP functions through a Javascript portal using ajax for administrative purposes. For example, we might have a function called updateAllDatabaseEntries() which would call AJAX functions in rapid succession, with those functions each executing numerous SQL queries. The problem is after making several successive requests from the same computer (not an excessive amount, maybe 30 in ten minutes) the system will stop responding to any PHP, HTTP requests ETC ONLY from my computer. From other computers in the office the panel can still be accessed, and access is restored to this computer after about 15 minutes. We believe this is not a glitch but some kind of security feature built into our server, possibly relating to Suhosin and likely well-intentioned but currently preventing us from running our system administration. Server Info: Linux 2.6.32-5-xen-amd64 #1 SMP Tue Mar 8 00:01:30 UTC 2011 x86_64 GNU/Linux Cheers - DS

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  • google webmaster soft 404 on 301

    - by Daniel
    I'm looking through google webmaster that my page is generating soft 404 errors (https://support.google.com/webmasters/answer/181708?hl=en) google says: We recommend that you always return a 404 (Not found) or a 410 (Gone) response code in response to a request for a non-existing page But I've got redirects set up that handle old pages to redirect to the proper new pages using a 301. The website links changed because of a use of a framework, which allows it to be more consistent, but the old pages till have links out there to these. Should I be worried about this? IS google penalizing the site for this? (Using IIS 8, Tomcat, CF10, Win)

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  • Windows 7 Virtual PC + Linux Ubuntu

    - by Daniel Henry
    I've installed Ubuntu inside a virtual machine running on Windows 7's Virtual PC. One thing I've noticed right away is that it has to capture the mouse and not all the hardware works as expected. I didn't have such problems in my virtual Windows XP. Is there anything I need to do to either Virtual PC or within Ubuntu that will get them to cooperate as well as Windows XP seems to?

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  • Sort each standalone line alphabetically

    - by Daniel
    I want to sort some items in alphabetic order, but in a very specifc way. I have, for example, the following list, each item separated by comma: monkeys, dogs, cats pineapple, banana, orange yellow, red, blue, green silver, gold, platinum delphi, java, c++, visual basic I want to sort each line alphabetically, WITHOUT changing line order. My desired result would be: cats, dogs, monkeys banana, orange, pineapple blue, green, red, yellow gold, platinum, silver c++, delphi, java, visual basic My target list has got 3000+ lines, so it should be an automated process. Thanks!

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  • Setting http auth type in phpMyAdmin on Debian

    - by Daniel Hollands
    I'm trying to set-up the fresh phpMyAdmin install on my Debian 6 server to use http authentication rather than the cookie based auth that is default when it is installed. To do this, I edited the $cfg['Servers'][$i]['auth_type'] line to use 'http' as its setting in /etc/phpmyadmin/config.inc.php, and restarted the server, but the setting seems to be being ignored, as when I goto phpmyadmin, it is still offering up the regular login box. I've done this twice before (once on debian and once on ubuntu), so I'm not sure why it isn't working this time. Thank you

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  • Firefox won't start

    - by Daniel R Hicks
    OK, I've got this problem again, only this time the problem only seems to affect Firefox and Thunderbird. Rebooted several times. Tried resetting to the last restore point, but that didn't work. Tried setting a new Firefox profile, and that didn't work either. The symptom is that you click on the Firefox or Thunderbird icon, the process appears in the Process Explorer list, but the window never opens. Curiously, if Firefox has been "started" this way, Internet Explorer hangs starting until I kill the Firefox process. Any ideas? I suppose the next thing to try is uninstalling and reinstalling Firefox/Thunderbird, but this whole thing is getting old. The box is a Sony Vaio running Windows Vista. It was completely restored from scratch less than two weeks ago, after the last fiasco. (I'm suspecting that my aborted install of Acronis True Image may have mucked things up this time.) Sigh! Another symptom: It occurred to me to try printing something, but if I open "Printers" it just sits there "searching". So something is rotten in the bowels of Windows. Minor update: It occurred to me to kill Internet Explorer (where I'd attempted printing). Then Printers comes up fairly quickly -- with no printers defined. Clicking "Add a printer" does nothing. Update: Well, following this suggestion to stop and restart the print spooler brought the printers back. And, wonder of wonders, Firefox now starts OK. Stopping and restarting the print spooler!!

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  • Creating Apple iPhone/iPod-Like Icons

    - by Daniel
    What is the best way to create apple iPhone/iPod shaped icons, ideally there should be a website that you can upload images to and have an them shaped to the default shape, etc. Does this exists? What is the best way to great these icons? I did find this: http://elitebydesign.com/design-the-itunes-icon-for-the-iphone-and-ipod-touch/ But there should be a batch type program out there somewhere...

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  • Installing the Apple Root Certificate Authority on CentOS CLI

    - by Daniel Hollands
    I could be barking up the wrong tree here, but I'm looking for help on installing Apple's Root certificate (http://www.apple.com/certificateauthority/) on a CentOS server via the command line - which I need to send messages to their APNS system. The code I'm using for this purpose is a variation on this: https://github.com/jPaolantonio/SimplePush/blob/master/simplepush.php - which works perfectly well on a Windows server, but as soon as we try to use it on a CentOS one, it falls over. We're lead to believe this has something to do with not having the CA installed on our CentOS box - but all efforts to do so have failed. As the CentOS server is headless, we need the ability to do this via the commandline. Can someone help?

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