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• map linux drives to windwos 7 for media stream over internet

  - by Ortix92

  I'm trying to map a linux network drive to my windows 7 laptop, however this laptop is not on LAN. At home, I simply use Samba, but this obviously won't work over the internet. I'm trying to avoid VPN, so if there are other solutions, I would like to know about them. The reason I ask is because my university does this as well. We can simply map folders to our computers without VPN connections. I'm not sure what they are running as servers. The main reason is because I want to be able to access my files stored on my home server wherever I go. They are located in the /home/ folder (videos, music and pictures folder). I'm trying to keep my websites and media separate from each other. I wouldn't mind accessing them from a web interface either, but I would like to keep the directory structure intact. I remember having an app like that come with winamp and running it on my windows pc (As the server). Unfortunately it doesn't work for linux. Any ideas on what I could use? Would XBMC be able to help me out with this? I did do some researching but I couldn't find any concrete answers

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• How do you set up CRON?

  - by user1723760

  I have never used CRON before but I want to use CRON in order to be able to perform schedule jobs for a php script. The php script is called "inactivesession.php" and in the php script is this code: <?php include('connect.php'); $createDate = mktime(0,0,0,10,25,date("Y")); $selectedDate = date('d-m-Y', ($createDate)); $sql = "UPDATE Session SET Active = ? WHERE DATE_FORMAT(SessionDate,'%Y-%m-%d' ) <= ?"; $update = $mysqli->prepare($sql); $update->bind_param("is", 0, $selectedDate); $update->execute(); ?> Wht I want to do is that when the above date is reached (25th Oct), I want the php script to perform the UPDATE statement above. But my question is that how do I use CRON in order to do this? The server I am using is the university's server known as helios, does CRON need to be set up in helios, (do I have to call the admin for this) or is it something else which uses CRON. I have never used CRON before so can you explain to me how CRON can be set up for the example above with the server I am using? Thanks UPDATE: Hi, I think the name of the OS is actually helios but I am not sure, I have a wikipedia page on this: here. I will read the crontab wikipedia page and see what I can find, but what my question is that is CRON already set up, do I just go right ahead and use CRON or do I need to set it up first?

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• Recommendations for good Unix MTA / groupware solutions? [closed]

  - by Jez

  Possible Duplicate: Exchange server replacement that runs on Linux I'm setting up a Debian server, and one of the things I need on it is an MTA. I don't want to use something like Exim or Postfix because I want something that ties in SMTP, POP3, and IMAP all in one (a la Microsoft Exchange). Most MTAs also seem to be hellishly difficult to configure. Try and read the Exim documentation; you could do a university degree on it (I'm not kidding). When you can get an HTTP server like Cherokee which is easy to configure and has a nice web interface, do MTAs or groupware solutions need to be that hard? I'm aware that some people think "the Unix way" is to have lots of different interacting pieces of software (like maybe an SMTP MTA, POP3 service, webmail service, and overarching manager to tie them all together), but I think this is a situation where that just makes things a lot harder to deal with and one large software suite fits in much more nicely. So, I'm looking for good open source software suites that will run on Debian that: Combine (at least) SMTP, POP3, and IMAP Are easy(ish) to configure Have a nice configuration web interface or GUI Are not defunct projects I don't mind if it's groupware and offers calendaring too, but I would only be using the e-mail functionality for now. Another nice-to-have would be built-in webmail (if we're combining a bunch of functionality, why not?) Note however that I do NOT need Outlook support. I am not really looking for an "Exchange replacement drop-in". The suites I've found so far that seem to match the above criteria (and have appropriate licenses) are Citadel, Kolab, and Zimbra. I'd appreciate anyone who has experience with any of these giving me the pros and cons of them, such as how easy they are to configure and what their performance is like. I'd also appreciate any other suggestions for solutions that fulfil my criteria that I may have missed out.

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• Hibernation fails; The system cannot find the file specified

  - by GMMan

  Recently I installed Ubuntu 12.04.1 LTS on my Lenovo Y480. Hibernation was working properly after the Ubuntu install, but I was making sure all of the operating systems on my system worked, including OneKey Recovery (recovery partition). It is of note that I installed Windows 7 from scratch with a disk image I downloaded off of my university's DreamSpark program, and further to that I had to image the partition with Paragon Backup & Recovery, repartition to convert the Windows partition to extended, install Ubuntu, and then restore the image. During that process I also used the Windows disc to edit the BCD as to reuse the existing entry for the restored partition. I also used the automated "repair your computer" option. With verification, I noticed that the "repair your computer" option actually wrote to the wrong BCD (the recovery partition), and I mounted the partition and restored the original BCD (from a copy I made earlier), and rebooted. At this point my GRUB broke, and I was able to restore it. At this point hibernation broke. I tried powercfg /h off and powercfg /h on, rebooted, and nothing. Also tried increasing the hibernation file size as directed on this post, but it still doesn't work. Executing shutdown /h yields The system cannot find the file specified.(2). What file? It seems that mounting the system partition sometimes works, but I don't want to keep it mounted in case it gets written to accidentally. How do I permanently fix this?

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• Is it possible to trace someone using Google during an online exam?

  - by George

  I happen to be a professor at a reputed college. I want to design an online exam for over 1000 students via around 50 computers right after the vacation ends. Now the problem is that I have heard that many students use Google on a different tab to find answers when no invigilator is around. I want to know if there is a way to backtrace it after the exams via some kind of history or any other possible way. In our university there is a standard system. I am not good with computers but I will try to explain. Each computer uses mozilla to connect to a server centrally located via an IP. The students open it and enter a unique ID and password to start the exams. Many questions are jumbled and different groups of students give exam in a different time slot. Is there any way to trace it since I want to set an example for students so they won't cheat and give exams in an honest way. Additional details: Since the number of computers are less than the number of students, more than 10 students are going to use a single computer on a single day over a period of 10 hours. After this, if I check the history (and let's say someone even forgot to delete the history and I see it), will I able to figure out who among the 10 has done it? Moreover, is it even practical and feasible?

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• Why does my computer not always automatically request a new DHCP lease when switching networks?

  - by KingJ

  I've noticed an interesting problem recently where my laptop will not automatically refresh my DHCP lease when changing between wireless networks. Instead, it will attempt to use the existing lease for the new network. Of course, since each network has different settings any connections will fail when using the old lease. While Windows will eventually request a new DHCP lease, it's often much faster for me to release the old lease and request a new, correct, lease. It puzzles me as to why this is not automatically done when associating to the network? One possible cause is that the laptop is put to sleep while connected to one network, then woken when in range of the other network. Nevertheless, I would expect that the lease would be renewed when the laptop associates to the other network rather than attempting to use the old lease. It should be noted that the two networks are completely different, both in terms of size, number of APs, network settings, SSIDs etc. One network is my home network and the other one is the campus-wide network at my University.

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• Clean installation of RHEL 5.5 claims package "desktops" is missing

  - by TKguru42

  Hi all, I'm a student worker in the CS department of my university, so please forgive me for any unprofessional descriptions. Simplified explanations are appreciated. I recently replaced some bad graphics cards in a few public workstations. The machines are all the same model. Before putting them back on the network I did fresh installs of RHEL---first I tried 5.4, but yum update ran into all sorts of ugly dependency errors and if I tried to remove any of the problematic packages, the whole operating system FUBAR'd. Using RHEL 5.5 gave me the same errors during install saying that "java.1.5.1-sun*" and "desktops" were missing, but yum update didn't have any dependency problems. Now that I tried logging in through the GUI, I encounter no GUI past the standard RHEL login page. The desktop is a uniform light teal and there's no system tray. An xclock window and an xterm window are open, and Firefox opens automatically, but that's it. Nothing else. What's REALLY confusing is that the computer claims that gnome is already installed, except it clearly isn't working. Any help or advice is greatly appreciated. If it helps, our department uses kickstart to run our standard Linux installs. I can try to get the script if that would be of use. Thank you!

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• How to manage enterprise network of Linux machines?

  - by killy9999

  I work at the university. In my institute we have six computer laboratories used for teaching. Each lab has almost 20 computers, which gives over 100 machines total. Computers have either Windows XP or Windows 7 Eneterprise operating system. We use Symantec Ghost to manage all the computers. Each computer has a Ghost client installed, which allows to control computers over network. Every six months we restore a master image on one of the computers in a lab, update that image and distribute it over the network to all computers in a laboratory. Thanks to Ghost client this is done automatically with just a few clicks. Recently I suggested that it would be good to have Linux installed in the laboratories. The administrators were concerned that we would not be able to manage that many computers if each would have to be updated manually. The question is: how to manage such a huge network of Linux machines in an automated way? To make the description of our network more complete I'll add that all students have their accounts (about few thousand users) on a central server. These are accessed via LDAP. To use a computer in laboratory each student has to log in using his own account.

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• SSH access to VM on windows 8 hyper-v

  - by samw

  I'm currently attending University and prefer a Linux environment to do much of my work, but all I have is a ThinkPad running Windows 8 Pro. Cygwin is nice, but it leaves me missing things like apt-get. My latest solution is to run an Ubuntu 12.04 VM with Windows 8's Client Hyper-V and use Cygwin for SSH access. I've looked everywhere online trying to set this up, but I haven't found much help. I've done this before using VirtualBox, so I figured this would be possible as well. Could anyone provide advice for setting up this environment? I'm completely uninitiated to Linux networking, virtual networking, and... pretty much all networking configuration, so this has been quite a challenge for me. What I've done so far: Created an external virtual switch to my wireless NIC. With this, I could successfully SSH to the VM with the leased IP address. But without a static IP, I would soon get disconnected. Created an internal virtual switch and attempt to "share" my main internet connection. (I was following the description on this page) Thank you all in advance!

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• Windows 7 Upgrade Fail from Home Premium to Ultimate Professional

  - by Michael S-B

  I had a hard drive crash, which meant I had to install a new HDD in my Dell 64-Bit XPS 1350 (lovely computer). I had previously been running Windows 7 Ultimate Professional which I had upgraded from the OEM Win 7 Home Premium by means of a disk I purchased from my university. Using the Recovery disk from Dell I installed Windows 7 Home Premium successfully on the new hard drive, but when I have tried to upgrade via my disk to Ultimate it installs the whole thing, says its complete, but when I reboot, tells me: "This version of Windows could not be installed. Your previous version of Windows has been restored, and you can continue to use it." I've installed the drivers from Dell's driver disk, but still to no avail. I've also used Driver Robot to update all my drivers. I can't find a .dmp file anywhere under C:\$WINDOWS.~BT\Sources but I did find this file under C:\$WINDOWS.~BT\Sources\Panther. setupact.log https://www.dropbox.com/s/yzy7fhkxlzc235y/setupact.log If anyone could please advise me what I need to do to fix Windows so it will upgrade properly, I would greatly appreciate it.

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• VirtualBox - bridged adapter settings fail in Windows 7 host

  - by pcampbell

  Consider a Windows 7 host where the VirtualBox guest is configured to use Bridged Adapter. An exception is raised when starting this guest machine: Failed to open/create the internal network HostInterfaceNetworking (VERR_SUPDRV_COMPONENT_NOT_FOUND) Result Code: E_FAIL (0x80004005) What resolution is there to this problem for Bridged Adapters in VirtualBox? The solutions attempted: changed Adapter Type to all available choices. No changes. uninstall VirtualBox, reboot host, re-install VirtualBox. No change in behaviour. edited the machine's .xml file, wiping out all <Network> <Adapter> nodes. Had VirtualBox re-create those nodes. No change. Host Details Oracle VirtualBox 3.2.4 (release 62467) Windows 7 x86

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• Unable to remove file using 'rm'

  - by Alvin Sim

  Hi all, In one of our severs (IBM AIX), we have a file in path /data/1002/ which we were not able to remove or delete using the 'rm' command. The error message we got is "rm: A1208001.002: A file or directory in the path name does not exist." With the "-f" option, no error message was displayed, but the file is still there. This file has a '0' byte size and when i use the command "touch A120001.002", i see two files with the same file name in that directory. The directory listing is as below: $ ls -l total 56 -rwxrwxrwx 1 oracle dba 0 Feb 09 11:57 S1208001.002 drwxrwxrwx 4 nobody dba 24576 Feb 09 13:36 backup How do I remove this bogus fie? Thanks.

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• Install "Massive Coupon"

  - by ffffff

  I'want to install "Massive Coupon" http://github.com/robstyles/Massive-Coupon---Open-source-groupon-clone I've set up apache2 + mod_wsgi + mysql on Ubuntu 9 And written the following settings.py # Django settings for massivecoupon project. import socket, os . . DATABASE_ENGINE = 'mysql' # 'postgresql_psycopg2', 'postgresql', 'mysql', 'sqlite3' or 'oracle'. DATABASE_NAME = 'grouponpy' # Or path to database file if using sqlite3. DATABASE_USER = 'grouponpy' # Not used with sqlite3. DATABASE_PASSWORD = 'password' # Not used with sqlite3. DATABASE_HOST = 'localhost' # Set to empty string for localhost. Not used with sqlite3. DATABASE_PORT = '' # Set to empty string for default. Not used with sqlite3. What I have to do additional then?

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• Kickstart PXE Boot Installation not working

  - by Anshuman

  I tried installing PXE Boot Installation Server on RHEL 6.0. I seem to have done everything according to the page: http://www.linux-sxs.org/internet_serving/pxeboot.html. In my case, the client boots, gets DHCP IP address from our server, connects to the Kickstart server too, but then nothing happens. It shows: Loading 192.168.1.101: pxe.linux.0 ..... 192.168.1.101 in my kickstart server. Did any one face such a situation? I'm using a test env on Oracle Virtualbox with DNS Server on RHEL 6.0, DHCP Server on CentOS 6.0 and Kickstart server on RHEL 6.0. The image I'm trying to install is that of REHL 6.0! Awaiting some responses! Cheers, Anshuman

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• PHP ZendOptimizer on Red Hat Enterprise Linux

  - by Jacob Kristensen

  I would like to install FlashMoto and the requirements are not unreasonable: PHP 5.2.1 or higher, Zend Optimizer 3.3 or higher. However my RHEL 5.4 provides me with PHP 5.1.6. So I tried the remi repository http://rpms.famillecollet.com/ but it gave me PHP 5.3.1 and Zend Optimizer from zend.com does not support anything higher than 5.2.x. I also tried the dag repo but it does not have PHP in any version. I also tried some RPMs that Oracle provides on their homepage but they don't provide php-mbstring that I also need. Does anyone know how to get PHP 5.2.1 installed on a RHEL 5.4? Then I can probably fix install the Zend thing. Thanks in advance.

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• What is the data transfer speeds within the disk, to other devices?

  - by Kumar

  I use Debian 6 on a HP Elitbook 6930 with 2Gigs of RAM. I was copying two AVI files, 1.5 GB in total, and noticed that the data copying was done at the rate of 4MB/sec. When I copy same AVIs to my Western Digital Passport 25G USB plugin drive the data transfer speed is 11+MB/sec. This speed is different if I plugin the drive to different USB ports. Interestingly, at work I also downloaded a 16MB IE8 exe on my virtual xp, run inside Oracle Sun Virtual Box, and it was downloaded AND saved within a second. We have a high speed network at work. :-) Why and how this difference in data speeds is possible?

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• Citrix XenServer iSCSI shared disk?

  - by chsguy

  I am running Citrix XenServer Essentials 5.5, with VMs stored on an EqualLogic iSCSI shelf, using XenServer's StorageLink. I would like to create a "virtual disk" that can be attached to multiple VMs. This would be used for a cluster file system like OCFS2 or GFS. This doesn't seem possible using the XenCenter GUI and I can't find anything online about how to do it. I realize I could simply expose the iSCSI network to the VM and have the VM initiate its own iSCSI, but that creates a lot of security challenges. This was pretty easy to do on Oracle VM Server, which is Xen based, so I know it's not a limitation of Xen itself. Maybe there is an "xe-" command for this? Thanks for any suggestions you can provide.

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• vmware server end of life, where to go now?

  - by matnagel

  We have some virtual machines on vmware server 2.x running on 64 bit hardware and quite happy with it. As vmware server will no longer be offered we are thinking to migrate to ESXi, which seems is free. We will have to install the specialized network cards but that's a minor problem. But once left alone with a quite silently discontinued product there is some resistance to vmware. VirtualBox seems to work: http://blogs.oracle.com/virtualization/2010/06/migrating_from_vmware_to_virtu.html What other free (of licencing cost) options are there? We have windows server 2003 32 bit VMs and also linux 32 and 64 bit VMs to migrate. So xen does not seem an option, which does not run microsoft OSes.

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• jetty crash trouble shooting

  - by user886356

  Recently I switch to amazon ec2 + jetty9 + oracle jdk7_u45 for cost saving. I found the jetty server is very unstable. It crash randomly without any jvm dump file. Tried to enable stdout with the dumpBeforeStop=TRUE. It won't append the dump messages to stderrout.log before crash. Seems it isn't related to OutOfMemoryError as I have enabled the gc verbose options and found it still has many available memory before crash. : 162604K-3340K(176960K), 0.2240040 secs] 248332K-89101K(373568K), 0.2736860 secs] [Times: user=0.01 sys=0.01, real=0.28 secs] Tried to downgrade to jetty8 with different jdk combination (jdk6 / jdk7). Still got the same problem. Tried to remove all jvm options and using "sudo java -jar start.jar" to run jetty. Still crash. Any other way to shoot the problem?

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• Change Management Software

  - by Andrew

  I manage an 80,000 user CIS application written in Uniface. Every form in the application, and many of its processes, are represented by .frm files. We have hundreds of these files and 5 instances of the application. Instances include multiple production installations which must be kept sync'd. We do not get MD5 from our vendor for files that are released to us as patches. We have been using a spreadsheet to track changes, but this is far from ideal. Is there a commercial application that can be purchased that will allow us to track changes to the instances? Thank you all! EDIT: Patches are released as zip files with either FRM files in them or SQL files or a mix of both. SQL files will contain statements that need to be run in Oracle. Patches are also assigned unique patch numbers.

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• Multicast doesn't seem to be working on RHEL 5.5

  - by NullUser

  I'm trying to install Oracle Grid Infrastructure on two machines. Their documentation states You must enable multicasting for the cluster on the IP address subnet ranges 224.0.0.0/24 and 230.0.1.0/24 So I ran: route add -net 224.0.0.0/24 dev eth2 route add -net 230.0.1.0/24 dev eth2 route -n produces: Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 230.0.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth2 224.0.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth2 # and others An ifconfig eth2 shows, among other things, UP BROADCAST RUNNING MULTICAST. However, when I run their multicast test utility, it fails me: Test for Multicast address 230.0.1.0 Sep 3 19:40:39 | Multicast Failed for eth2 using address 230.0.1.0:42000 Test for Multicast address 224.0.0.251 Sep 3 19:41:10 | Multicast Failed for eth2 using address 224.0.0.251:42001 What am I doing wrong?

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• Java version indicates SE 6, Java Control Panel SE 8

  - by Mariogs

  So I'm trying to get the Java 7 as the default version on my machine, running Mac OS X 10.9.3. When I run: java -version I get: java version "1.6.0_65" Java(TM) SE Runtime Environment (build 1.6.0_65-b14-462-11M4609) Java HotSpot(TM) 64-Bit Server VM (build 20.65-b04-462, mixed mode) When I run: javac -version I get: javac 1.6.0_65 When I go into System Preferences -- Java -- Update, I see: Your system has the recommended vesion of Java. Java 8 Update 05. I guess I have a few questions: 1) Why does my Java Control Panel claim I have Java 8, but my work in the terminal (when checking my Java version) says otherwise? 2) I just downloaded the .dmg file for Java SE 7 from Oracle's site and installed, though it's nowhere to be seen... Thanks for the help, Mariogs

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• Instant database snapshot

  - by raj

  My product uses oracle 9 database in its backend. every week the new release of the product is launched which will want to fire some DML, DDL queries to the database. I usually test the product release in a dummy database before applying it in the main database. I create a database dump using exp command, then import them into dummy database using imp. then i test the product in the dummy database and checks if there are any errors. This exp and imp takes about 3 hours to complete. Is there any alternative as : instant snapshot of the live database (which will be independent of the live one)? or is there any option to keep dummydatabase in sync with the originl database always. Yhis can be done by making the product firing DML&DDL queries to both the databases.. but this will be a HUGE performance problem.. how can i overcome this?

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• Named ports in windows!

  - by Jay

  I wonder how stuff like this works in windows (xp and other that have telnet): Start-> Run -> cmd -> telnet <xyz.com> http Start-> Run -> cmd -> telnet <xyz.com> pop3 Start-> Run -> cmd -> telnet <xyz.com> smtp Are these "named" ports? Only windows knows that it has to substitute port numbers coz these are standard ports? Is there way I could create such a named port on windows? I would like something like this : telnet <xyz.com> oracle to translate to telnet <xyz.com> 1521

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• alternatives to SGE

  - by bmargulies

  Once upon at time there was the free SGE from Sun. tricky to install and configure, but functional and free. Now we've got: open source packages on Ubuntu that don't quite work out of the box (details on request). the actual source behind them, with a build process that depends on the c-shell and other obsolescences, available from two competing locations. a commercial packaging from Oracle a commercial package from Univa What I am really wishing for is something with the basic capabilities of this that is simple to install and maintain. Heck, I'd take a front-end to hadoop that just queues and distributes simple shell-script-defined jobs.

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