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• IIS6 Permissions

  - by Gordon Carpenter-Thompson

  We have a set of IIS6 Jakarta/ASP.NET applications (implemented as virtual directories) on a machine without a domain. The directories all exist under the default website. We need to setup the permissions so that certain users can access only specific applications yet others users can access several of the applications. The way it's been setup previously has been to explicitly deny access to the users for every application except the ones that they are allowed to see. The problem is that the list of applications changes fairly often (for demos etc) and it's been known for the developers to forget to deny the old users access to the new applications which leads to security problems. This is all quite unmaintainable. Does anybody have any advice on this? Surely I can't be the only person to find this all a bit of a mess? Thanks

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• Web App Server hardware question. Which configuration?

  - by JBeckton

  I am pricing some new servers and I am not sure which configuration to get. The server will be running several web applications for our company. Some of them are ASP.Net sites and some are ColdFusion. The OS will be Win Server 2008 Web or Standard Edition. Do I need 2 processors or will a single quad core handle it? Xeon multi core Hyperthreading or non Hyperthreading? I am going 64bit so I can go higher than 4 Gigs of Ram. I am shopping at Dell and there are so many options, I want to get the most bang for my buck without going over budget and I also don't want the machine to be mostly under utilized.

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• Distributed transactions and queues, ruby, erlang

  - by chrispanda

  I have a problem that involves several machines, message queues, and transactions. So for example a user clicks on a web page, the click sends a message to another machine which adds a payment to the user's account. There may be many thousands of clicks per second. All aspects of the transaction should be fault tolerant. I've never had to deal with anything like this before, but a bit of reading suggests this is a well known problem. So to my questions. Am I correct in assuming that secure way of doing this is with a two phase commit, but the protocol is blocking and so I won't get the required performance? It appears that DBs like redis and message queuing system like Rescue, RabbitMQ etc don't really help me a lot - even if I implement some sort of two phase commit, the data will be lost if redis crashes because it is essentially memory-only. All of this has led me to look at erlang - but before I wade in and start learning a new language, I would really like to understand better if this is worth the effort. Specifically, am I right in thinking that because of its parallel processing capabilities, erlang is a better choice for implementing a blocking protocol like two phase commit, or am I confused?

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• What functionality of an iPad can I use with Ubuntu?

  - by Andrew Ferrier

  What functionality of an iPad can I use with Ubuntu? I'm thinking about buying an iPad, but I only have Ubuntu PCs these days (no Windows, no Mac), and I'm nervous that it may be too reliant on the existence of iTunes. I'm less concerned about getting media onto and off it (and I have read that I can do this with libimobiledevice), but will I be able to activate it with iTunes? Does it need to be USB synced on a regular basis, or can I do most anything I want through the cloud (i.e. over wifi)? Edit: In answer to jrgifford's question, in theory, I'd like to do everything I would want to do with it were I using Windows/Mac. But more specifically, I think I'd want to: "Activate" it, if that's necessary Copy music / video onto it Install apps How much of this can I do without a Windows/Mac PC? Is it necessary to activate it? I don't think I'm that interested in backing it up (what would I back up?), but then again, maybe I'm confused as to how easy it is to get data on and off. Can I get a regular SFTP app for the iPad to copy data to my Ubuntu machine over wi-fi, for example?

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• How to sync Ubuntu/software/configurations between N computers with free software and/or without a cloud?

  - by skanatek

  Note: this question is not about syncing data in a Dropbox-like way (files, folders), it is more about syncing configurations. I would like to have exactly the same version of Ubuntu with all the software installed and configured both on my Desktop PC and on my Laptop PC (and maybe on my small netbook PC) without using Ubuntu Sync and with minimal maintenance effort (setup once, run for a long time). The use case is the following: I work on my Laptop PC and do some changes to software configuration, for example: configure vim to have a new plugin update the Search Tracker / Recoll file search index configure Thunderbird to have an additional IMAP account ('remember password') add some new bookmarks in Firefox/Chrome change the desktop background image install new software with apt-get install build and install new software with checkinstall etc. I do some 'sync' operation I switch to my Desktop PC and get all the changes from (1) working on the Desktop PC I work on my Desktop PC and do some changes to software configuration, for example: add new directory to the list of directories to be backed up by DejaDup add a new check spelling dictionary to the Libreoffice Writer configure the Terminator software to have colored fonts install new font into the Ubuntu system configure Ekiga to make phone calls etc. I do some 'sync' operation I switch to my Laptop PC and get all the changes from (1) and (4) working on the Laptop PC. Question: What free/open-source software can I use to sync both machines' Ubuntu systems, installed software and configurations? Is it possible to do that without any cloud services? Complementary question: It is obvious that the Desktop PC and the Laptop PC have different hardware configurations. How does the 'sync software' in question deal with video drivers, wlan drivers and their configurations? Note: I do not need all the PCs to be synced at the same time, because I work with only one single machine at once. Note: I considered to use Chef to solve the problem, but it seems that it might be really cumbersome to maintain such a setup. Note: I also considered using a bootable USB with Ubuntu installed (portable Linux), but I am not sure that the video drivers will work then.

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• Can't run telnet in console opened by Autohotkey

  - by Steve Crane

  I have enabled the telnet client on my Windows 7 64-bit machine and if I open the start menu and launch cmd from there I can run telnet. I normally use the keyboard shortcut Win-C, implemented by this AutoHotkey snippet to open a console. #c::Run, C:\WINDOWS\system32\cmd.exe For some strange reason when I try to run telnet in a console window opened this way I get Microsoft Windows [Version 6.1.7601] Copyright (c) 2009 Microsoft Corporation. All rights reserved. C:\Users\Steve\Documentstelnet 'telnet' is not recognized as an internal or external command, operable program or batch file. Running path in any console, regardless of how it was opened produces the same output. Can anyone shed any light on why telnet might run in one console but not the other?

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• How to register putty public key on windows server 2003?

  - by igarren

  So we were trying to transfer files from unix server to a windows server 2003. I currently don't have any visibility on the unix server since it is being handled by another team. So in order for the 2 servers to establish connection, they sent us a public key which they said that we need to register on our windows server 2003 machine. can anyone help me? i cant seem to find anything about registering this public key generated by putty on a windows server 2003. there's no directory to put the public key(like in linux authorized_keys). Any help will be appreciated. thanks in advance. EDIT: we're trying to transfer file via pscp if this info is needed.

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• SVN check out to samba directory

  - by Jon H

  I'm trying to svn co to a directory on Ubuntu, shared via samba, to OS X, but I get the following error (in OS X). svn: In directory 'site/product/tests' svn: Can't open file 'site/product/tests/.svn/tmp/text-base/._base.py.svn-base': No such file or directory My smb.conf file includes the following changes: unix extensions = no browseable = yes public = yes writable = yes delete readonly = yes create mask = 0775 directory mask = 0775 valid users = %S read only = no The checkout works fine locally (on the Ubuntu machine). What am I missing? More detail: Later inspection showed that the svn error couldn't find the file with 3, then 2 underscores: .___init__.py.svn-base Whereas listing the directory in OS X showed 2, then 2 underscores: __init__.py.svn-base And listing the same directory in a successful checkout on Ubuntu shows nothing (because it's a temporary directory?) I've tried the mangled = no setting in share settings, to no effect.

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• Error # 1045 - Cannot Log in to MySQL server -> phpmyadmin

  - by SilverLight

  We have installed PHPMyAdmin on a windows machine running IIS 7.0. We are able to connect to MySQL using command-line, But we are not able to connect using PHPMyAdmin. The error displayed is: Error #1045 Cannot log in to the MySQL server. Can somebody please help? PHP Version 5.4.0 mysqlnd 5.0.10 - 20111026 - $Revision: 323634 $ phpMyAdmin-3.5.4-rc1-all-languages.7z EDIT : I followed the link below with no success, mean i changed that password but phpmyadmin still has that error... C.5.4.1.1. Resetting the Root Password: Windows Systems Thanks.

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• Atelier gratuit : Découvrir la solution d'exploration de données structuré et non structuré

  - by David lefranc

  Explorer et découvrir l’information… Nous vous proposons un atelier découverte pour vous permettre d’explorer toute type de données grace à la solution Oracle Endeca Information Discovery. Quand : 7 Décembre 2012 De 9h30 à 12h30  Lieu : Oracle 15 Boulevard Charles de gaulle 92715 Colombes Pour s'inscrire : [email protected] Réalisé pour des utilisateurs métiers, cet atelier vous permettera en une demi journée , de découvrir Oracle Endeca Information Discovery afin de : Comprendre et explorer toute information venant de différents horizons ( Big Data, réseaux sociaux, forums, sondages, blogs..) Découvrir en quoi et comment OEID est un complément à des solutions de BI classiques Par une navigation simple et rapide, vous découvrirez combien il est facile de trouver des réponses à des questions imprévues en utilisant OEID sans formation préalable. Utilisez la recherche et la navigation guidée pour voir comment les informations structurées et non structurées peuvent être rapidement réunies pour dégager la valeur cachée. Explorer toutes vos données dans n'importe quel format et à partir de n'importe quelle source, y compris les médias sociaux, documents, fichiers,…. Pouvoir découvrir et explorer vos données sans référentiel pour permettre aux utilisateurs d’être autonome et d’analyser leurs propres données de manière rapide Élaborer une stratégie visant à accroître la valeur des données de l'entreprise tout en réduisant le coût total de possession Découvrez l'incroyable performance d’ Endeca sur Oracle Exalytics la machine In Memory Agenda Après une introduction sur la solution Oracle information Endeca, suivi d’un atelier, vous verrez comment il est facile de: Utiliser la navigation guidée et le moteur de recherche pour explorer les données structurées et non structurées intégrer rapidement les nouvelles sources de données comme les médias sociaux Construire de nouvelles interfaces utilisateur tout en découvrant l’information répondre rapidement aux besoins changeants des entreprises et des environnements de données Quand Lieu 7 Décembre 2012 De 9h30 à 12h30 Oracle 15 Boulevard Charles de gaulle 92715 Colombes

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• Google Reader offline sync (Gears) not syncing, stuck at 0%

  - by Yang

  I'm using Google Chrome, and for some reason starting over the weekend or Friday, I haven't been able to get Google Reader to sync for offline reading. When I hit the sync button, it just starts spinning and says: "Status: Downloading 2000 items...0% completed. Please wait..." There's no CPU, network, or disk activity on my machine, and it remains in this state indefinitely. I tried going to Chrome Settings, uninstalling Reader, navigating to Reader, and reinstalling Reader as a Gears app, to no avail. Any hints? Thanks in advance.

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• SSH not working over IPSec tunnel (Strongswan)

  - by PattPatel

  I configured a small network on a cloud virtual machine. This virtual machine has a static IP address assigned to eth0 interface that I'll call $EXTIP. mydomain.com points to $EXTIP. Inside, I have some linux containers, that get their ip through DHCP in the Subnet 10.0.0.0/24 (i called the virtual interface nat ). They run some services that can be reached through DNAT. Then I wanted to connect to these containers through an IPSec tunnel, so I configured StrongSwan. ipsec.conf: conn %default dpdaction=none rekey=no conn remote keyexchange=ikev2 ike=######## left=[$EXTIP] leftsubnet=10.0.1.0/24,10.0.0.0/24 leftauth=pubkey lefthostaccess=yes leftcert=########.pem leftfirewall=yes leftid="#########" right=%any rightsourceip=10.0.1.0/24 rightauth=######## rightid=%any rightsendcert=never eap_identity=%any auto=add type=tunnel Everything works fine, IPSec clients get IPs of the 10.0.1.0/24 subnet and can reach the containers subnet. My problem is that I'm not able to get SSH connections over the tunnel. It simply does not work, ssh client does not produce any output. Sniffing with tcpdump gives: tcpdump: 09:50:29.648206 ARP, Request who-has 10.0.0.1 tell mydomain.com, length 28 09:50:29.648246 ARP, Reply 10.0.0.1 is-at 00:ff:aa:00:00:01 (oui Unknown), length 28 09:50:29.648253 IP mydomain.com.54869 > 10.0.0.1.ssh: Flags [S], seq 4007849772, win 29200, options [mss 1460,sackOK,TS val 1151153 ecr 0,nop,wscale 7], length 0 09:50:29.648296 IP 10.0.0.1.ssh > 10.0.1.2.54869: Flags [S.], seq 2809522632, ack 4007849773, win 14480, options [mss 1460,sackOK,TS val 11482992 ecr 1151153,nop,wscale 6], length 0 09:50:29.677225 IP mydomain.com.54869 > 10.0.0.1.ssh: Flags [.], ack 2809522633, win 229, options [nop,nop,TS val 1151162 ecr 11482992], length 0 09:50:29.679370 IP mydomain.com.54869 > 10.0.0.1.ssh: Flags [P.], seq 0:23, ack 1, win 229, options [nop,nop,TS val 1151162 ecr 11482992], length 23 09:50:29.679403 IP 10.0.0.1.ssh > 10.0.1.2.54869: Flags [.], ack 24, win 227, options [nop,nop,TS val 11483002 ecr 1151162], length 0 09:50:29.684337 IP 10.0.0.1.ssh > 10.0.1.2.54869: Flags [P.], seq 1:32, ack 24, win 227, options [nop,nop,TS val 11483003 ecr 1151162], length 31 09:50:29.685471 IP 10.0.0.1.ssh > 10.0.1.2.54869: Flags [.], seq 32:1480, ack 24, win 227, options [nop,nop,TS val 11483003 ecr 1151162], length 1448 09:50:29.685519 IP mydomain.com > 10.0.0.1: ICMP mydomain.com unreachable - need to frag (mtu 1422), length 556 09:50:29.685567 IP 10.0.0.1.ssh > 10.0.1.2.54869: Flags [.], seq 32:1402, ack 24, win 227, options [nop,nop,TS val 11483003 ecr 1151162], length 1370 09:50:29.685572 IP 10.0.0.1.ssh > 10.0.1.2.54869: Flags [.], seq 1402:1480, ack 24, win 227, options [nop,nop,TS val 11483003 ecr 1151162], length 78 09:50:29.714601 IP mydomain.com.54869 > 10.0.0.1.ssh: Flags [.], ack 32, win 229, options [nop,nop,TS val 1151173 ecr 11483003], length 0 09:50:29.714642 IP 10.0.0.1.ssh > 10.0.1.2.54869: Flags [P.], seq 1480:1600, ack 24, win 227, options [nop,nop,TS val 11483012 ecr 1151173], length 120 09:50:29.723649 IP mydomain.com.54869 > 10.0.0.1.ssh: Flags [P.], seq 1393:1959, ack 32, win 229, options [nop,nop,TS val 1151174 ecr 11483003], length 566 09:50:29.723677 IP 10.0.0.1.ssh > 10.0.1.2.54869: Flags [.], ack 24, win 227, options [nop,nop,TS val 11483015 ecr 1151173,nop,nop,sack 1 {1394:1960}], length 0 09:50:29.725688 IP mydomain.com.54869 > 10.0.0.1.ssh: Flags [.], ack 1480, win 251, options [nop,nop,TS val 1151177 ecr 11483003], length 0 09:50:29.952394 IP 10.0.0.1.ssh > 10.0.1.2.54869: Flags [P.], seq 1480:1600, ack 24, win 227, options [nop,nop,TS val 11483084 ecr 1151173,nop,nop,sack 1 {1394:1960}], length 120 09:50:29.981056 IP mydomain.com.54869 > 10.0.0.1.ssh: Flags [.], ack 1600, win 251, options [nop,nop,TS val 1151253 ecr 11483084,nop,nop,sack 1 {1480:1600}], length 0 If you need it this is my iptables configuration file: iptables: *filter :INPUT ACCEPT [144:9669] :FORWARD DROP [0:0] :OUTPUT ACCEPT [97:15649] :interfacce-trusted - [0:0] :porte-trusted - [0:0] -A FORWARD -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT -A FORWARD -j interfacce-trusted -A FORWARD -j porte-trusted -A FORWARD -j REJECT --reject-with icmp-host-unreachable -A FORWARD -d 10.0.0.1/32 -p tcp -m tcp --dport 80 -m state --state NEW,RELATED,ESTABLISHED -j ACCEPT -A FORWARD -d 10.0.0.1/32 -p tcp -m tcp --dport 443 -m state --state NEW,RELATED,ESTABLISHED -j ACCEPT -A FORWARD -d 10.0.0.3/32 -p tcp -m tcp --dport 1234 -m state --state NEW,RELATED,ESTABLISHED -j ACCEPT -A interfacce-trusted -i nat -j ACCEPT -A porte-trusted -d 10.0.0.1/32 -p tcp -m tcp --dport 80 -j ACCEPT -A porte-trusted -d 10.0.0.1/32 -p tcp -m tcp --dport 443 -j ACCEPT -A porte-trusted -d 10.0.0.3/32 -p tcp -m tcp --dport 1234 -j ACCEPT COMMIT *nat :PREROUTING ACCEPT [10:600] :INPUT ACCEPT [10:600] :OUTPUT ACCEPT [4:268] :POSTROUTING ACCEPT [18:1108] -A PREROUTING -d [$EXTIP] -p tcp -m tcp --dport 80 -j DNAT --to-destination 10.0.0.1:80 -A PREROUTING -d [$EXTIP] -p tcp -m tcp --dport 443 -j DNAT --to-destination 10.0.0.1:443 -A PREROUTING -d [$EXTIP] -p tcp -m tcp --dport 8069 -j DNAT --to-destination 10.0.0.3:1234 -A POSTROUTING -s 10.0.0.0/24 -o eth0 -m policy --dir out --pol ipsec -j ACCEPT -A POSTROUTING -s 10.0.1.0/24 -o nat -j MASQUERADE -A POSTROUTING -s 10.0.0.0/24 -o eth0 -j MASQUERADE COMMIT Probably I'm missing something stupid... Thanks in advance for helping :))

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• Refresh banshee album art

  - by kmassada

  I usually just copy ~/.config/banshee-1, and ~/.gconf/apps/banshee-1 when i'm moving from one computer to the other, if I keep the path of the folders. I get to keep my music library intact with the playlists I have. The problem with this method is that, the album arts doesn't carry over nicely. You'd have to play every album to get the album art to appear. Anyone knows a workaround, to maybe force banshee to reload all album art? I saw this, but not quite what my issue is? I tried banshee --fetch-artwork, but didn't work too well kenneth@dv7:~$ banshee --fetch-artwork [Warn 11:23:38.200] DBus support could not be started. Disabling for this sessi on. - System.Exception: Error 111: Connection refused (in `dbus-sharp') at DBus.Unix.UnixSocket.Connect (System.Byte[] remote_end) [0x00000] in <filen ame unknown>:0 at DBus.Transports.UnixNativeTransport.OpenAbstractUnix (System.String path) [ 0x00000] in <filename unknown>:0 at DBus.Transports.UnixNativeTransport.Open (System.String path, Boolean abstr act) [0x00000] in <filename unknown>:0 at DBus.Transports.UnixTransport.Open (DBus.AddressEntry entry) [0x00000] in < filename unknown>:0 at DBus.Transports.Transport.Create (DBus.AddressEntry entry) [0x00000] in <fi lename unknown>:0 at DBus.Connection.OpenPrivate (System.String address) [0x00000] in <filename unknown>:0 at DBus.Connection..ctor (System.String address) [0x00000] in <filename unknow n>:0 at DBus.Bus..ctor (System.String address) [0x00000] in <filename unknown>:0 at DBus.Bus.Open (System.String address) [0x00000] in <filename unknown>:0 at DBus.Bus.get_Session () [0x00000] in <filename unknown>:0 System.Exception: Unable to open the session message bus. (in `dbus-sharp') at DBus.Bus.get_Session () [0x00000] in <filename unknown>:0 at DBus.BusG.Init () [0x00000] in <filename unknown>:0 at Banshee.ServiceStack.DBusConnection.Connect (System.String serviceName, Boo lean init) [0x00000] in <filename unknown>:0 at Banshee.ServiceStack.DBusConnection.GrabDefaultName () [0x00000] in <filena me unknown>:0 [Info 11:23:38.286] Running Banshee 2.6.0: [Ubuntu 12.10 (linux-gnu, x86_64) @ 2012-10-11 06:19:37 UTC] (Banshee:21865): GConf-WARNING **: Client failed to connect to the D-BUS daemon: Failed to connect to socket /tmp/dbus-vLxS6Riwsn: Connection refused [Warn 11:23:38.948] Could not read GConf key core.send_anonymous_usage_data - G Lib.GException: No D-BUS daemon running (in `gconf-sharp') at GConf.Client.Get (System.String key) [0x00000] in <filename unknown>:0 at Banshee.GnomeBackend.GConfConfigurationClient.TryGet[Boolean] (System.Strin g namespace, System.String key, System.Boolean& result) [0x00000] in <filename u nknown>:0 (Banshee:21865): GConf-WARNING **: Client failed to connect to the D-BUS daemon: Failed to connect to socket /tmp/dbus-vLxS6Riwsn: Connection refused [Warn 11:23:39.239] Could not read GConf key core.send_anonymous_usage_data - G Lib.GException: No D-BUS daemon running (in `gconf-sharp') at GConf.Client.Get (System.String key) [0x00000] in <filename unknown>:0 at Banshee.GnomeBackend.GConfConfigurationClient.TryGet[Boolean] (System.Strin g namespace, System.String key, System.Boolean& result) [0x00000] in <filename u nknown>:0

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• Setting up Ubuntu Server as a Router with DHCPD and 3 Ethernet devices

  - by cengbrecht

  My configuration: Ubuntu 12.04 DHCP3-server eth0, eth1, eth2 Edit: removed br0&br1 eth0 is the external connection eth1 & eth2 are the internal network eth1 and eth2 are supposed to be seperate networks of student/teachers respectivly. What I would like to have is the internet from external device bridged to device 1 and 2, with the DHCP server controlling the two internal devices. Its already working with DHCP, the part I am stuck on is bridging for internet. I have setup a script that I found here: Router With the original script he linked here: Ubuntu Router Guide echo -e "\n\nLoading simple rc.firewall-iptables version $FWVER..\n" IPTABLES=/sbin/iptables #IPTABLES=/usr/local/sbin/iptables DEPMOD=/sbin/depmod MODPROBE=/sbin/modprobe EXTIF="eth0" INTIF="eth1" INTIF2="eth2" echo " External Interface: $EXTIF" echo " Internal Interface: $INTIF" echo " Internal Interface: $INTIF2" EXTIP=`ifconfig $EXTIF | grep 'inet addr:' | sed 's#.*inet addr\:\([0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\).*#\1#g'` echo " External IP: $EXTIP" #====================================================================== #== No editing beyond this line is required for initial MASQ testing == The rest of the script below this is as is. I can get ip from the eth1 & eth2 devices, and my computer can see them, and them it, however, internet is not being passed through. If you need more information please just let me know. EDIT: So I had a 255.255.254.0 network, I believe that was causing the issue. Not sure if it will matter on the second card, I will test later. After changing the subnet to 255.255.255.0 the pings will pass through, however, I cannot get DNS requests to pass? My new Config for Firewall Rules # /etc/iptables.up.rules # Generated by iptables-save v1.4.12 on Wed Nov 28 19:43:28 2012 *mangle :PREROUTING ACCEPT [39:4283] :INPUT ACCEPT [39:4283] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [12:4884] :POSTROUTING ACCEPT [13:5145] COMMIT # Completed on Wed Nov 28 19:43:28 2012 # Generated by iptables-save v1.4.12 on Wed Nov 28 19:43:28 2012 *filter :FORWARD ACCEPT [0:0] :INPUT ACCEPT [0:0] :OUTPUT ACCEPT [0:0] -A FORWARD -j LOG -A FORWARD -m state -i eth1 -o eth0 --state NEW,ESTABLISHED,RELATED -j ACCEPT -A FORWARD -m state -i eth2 -o eth0 --state NEW,ESTABLISHED,RELATED -j ACCEPT -A FORWARD -m state -i eth0 -o eth1 --state NEW,ESTABLISHED,RELATED -j ACCEPT -A FORWARD -m state -i eth0 -o eth2 --state NEW,ESTABLISHED,RELATED -j ACCEPT COMMIT # Completed on Wed Nov 28 19:43:28 2012 # Generated by iptables-save v1.4.12 on Wed Nov 28 19:43:28 2012 *nat :INPUT ACCEPT [0:0] :PREROUTING ACCEPT [0:0] :OUTPUT ACCEPT [0:0] :POSTROUTING ACCEPT [0:0] -A POSTROUTING -o eth0 -j MASQUERADE -A POSTROUTING -o eth0 -j SNAT --to-source 192.168.1.25 COMMIT # Completed on Wed Nov 28 19:43:28 2012 Not sure what else you may need, but I am using Webmin to control the server(Needed for the operators on site to know how to use it.) If you could explain it as standard CLI commands, or edits to this file directly then we should be ok. :) And thanks again Erik, I do believe your edits did help.

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• Virtualbox shared folder mount from fstab fails; works once bootup is complete

  - by Ben

  I've got Ubuntu 13.10 installed in Virtualbox 4.3. The host machine is Windows. I have a couple of Virtualbox shared folders being mounted by /etc/fstab. Until recently this setup worked just fine, but after upgrading from Ubuntu 13.04 and Virtualbox 4.2 (at essentially the same time) the fstab mounting stopped working. I get the following error during boot: An error occurred while mounting /home/benme/Documents. keys:Press S to skip mounting or M for manual recovery Pressing M for manual recovery and then trying to mount manually also fails: root@benme-vb:~# cd /home/benme root@benme-vb:/home/benme# mount Documents /sbin/mount.vboxsf: mounting failed with the error: No such device But if I instead skip mounting during boot, wait for Unity to start and then mount manually in a shell, everything works fine: benme-vb ~ % ls Documents benme-vb ~ % sudo mount Documents [sudo] password for benme: benme-vb ~ % ls Documents # actual file list omitted Note that when I mount manually I'm letting mount take all the options from /etc/fstab, and it works. This suggests to me that it's some sort of timing issue, where Virtualbox isn't "ready" to provide the shared file mounts at the point /etc/fstab mounts are run during bootup. Here's the fstab line, just for completeness: Documents /home/benme/Documents vboxsf uid=benme,gid=benme,dmode=774,fmode=664 0 0 Is there something I can do about this from the Ubuntu side? Or does anyone happen to know more about this from the Virtualbox angle? I've found an old report on the Virtualbox bug-tracker with identical symptoms, but in that case the user had updated Virtualbox without updating their guest additions and resolving that fixed the problem; this isn't happening here, I've definitely got the 4.3 guest additions installed.

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• ExaLogic Hackers Night - November 19th Nürnberg Germany

  - by JuergenKress

  Hands-on Workshop for experienced developers and architects with implementation experience. We start with a short introduction into the infrastructure and the software configuration on ExaLogic machine. Accompanies by experienced experts you can develop and test own ideas, concepts and applications on Exalogic . This will happen in a relaxed and "Open End" manner. 19.11.2012, 09:00 am - open end  Nürnberg Germany at ISE Speakers: Kersten Mebus & Marcel Amende (ORACLE Deutschland B.V. & Co. KG) Matthias Fuchs & Herbert Rossgoderer (ISE Information Systems Engineering GmbH) Agenda & Registrierung Please register until 12.11.2012. thank you.) WebLogic Partner Community For regular information become a member in the WebLogic Partner Community please visit: http://www.oracle.com/partners/goto/wls-emea ( OPN account required). If you need support with your account please contact the Oracle Partner Business Center. Blog Twitter LinkedIn Mix Forum Wiki Technorati Tags: ise,exalogic test,exalogic training,education,ExaLogic,Exalogic training,training,Exalogic roadmap,exalogic installation,WebLogic Community,Oracle,OPN,Jürgen Kress

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• DVDs and CDs not recognized

  - by Larry Doyle

  I have Ubuntu 12.04 LTS installed on my computer (Sony Vaio VGN-NS205N). It reads some CDs and DVDs just fine, but many others it will not recognize at all, or will only recognize after opening and closing the CD tray many times. It just shows the cd/dvd drive as being empty and won't show that anything is on there at all. I have a few DVDs (from the same publisher) that work every time. This comes up most often when trying to show my kid Bob the Builder, etc. Some data CDs I would like to work with also have the same issue. It's not a hardware or defective disc problem, since all these will play in Windows on the same machine. It's just really annoying to have to switch operating systems to play videos or get data off discs. All the searches I have done people recommend installing medibuntu and other repositories. I have and they are all up to date. No change. Any help that works would be greatly appreciated.

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• windows 7 wireless knocks off other computers on the network

  - by Sean

  I am trying to fix a wireless network issue. When a new windows 7 machine (we have 2 in the house) we have problems with any other windows xp machines connecting to the wireless network. I am using a linksys WRT110 running Firmware Version: 1.0.04 (which is not the latest firmware its Ver.1.0.07 but the router would not use the bin update file). I have tried a ton of variations in setting for the wireless network, changed the channel, the security level (none, wep wpa, wpa2), network type (g,bg mixed). I have also read some stuff about homegroup settings for windows 7 but have not seen any differences that make a difference. Basically windows 7 does not like to connect to our network but when I manage to get it to work the windows xp pro machines get kicked off. The windows xp pro machines are a few years old but both windows 7 machines are less than 6 months old.

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• How to create a fully functional server of own? [closed]

  - by Saransh Sharma

  Hi i am looking for various companies for cloud hosting and servers dedicated one but i am not pleased with service being provided in our country and don't wanna opt to other country rather then India,well and also looking in cost factor too....so what i am looking is to create our own server which we can manage basically its like we would create a server or a machine or a pc and make it online and will use it as a server Problem is we need fully managed solution and we are not getting it anywhere and we are a startup looking to save and create something new in server so guys is it possible to create a server a webserver with home/dedsktop pc PLease help Saransh sharma

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• ATI (fglrx) Dual monitor / laptop hot-plugging

  - by Brendan Piater

  I feel like I've gone back 5 years on my desktop today. I'll try not dump to much frustration here... I been running 12.04 since alpha with the ATI open source drivers and the gnome 3 desktop. I been generally very happy with them with only small issues along the way. Now of course it does not support 3D acceleration 100%, so games like my newly purchased Amnesia from the Humble bundle would not play. OK, no worries, the ATI driver is in the repos so let me have a go I thought. With all this testing that's been done with multi-monitor support, what could go wrong...? How I use my computer: It's laptop, with a HD 3670 card in it. I spend about 50% of the time working directly on the laptop (at home) and about 50% of the time working with an additional display connected (at work), multi desktop environment. What happening now: installed drivers things seemed to working, save some small other bugs (not critical) this morning I take my machine and plug the additional monitor into it, and nothing happens... ok fine. open "displays" try configure dual display, won't work open ati config "thing" (cause it is a thing, a crap thing) and set-up monitors there reboot it says (oh ffs, really.... ok) reboot, login and wow, I got a gnome 2 desktop (presume gnome 3 fall back) and no multi-monitor...great. (screenshot: http://ubuntuone.com/5tFe3QNFsTSIGvUSVLsyL7 ) after getting into a situation where I had to Ctrl + Alt + Del to get out of a frozen display, I eventually manage to set-up a single display desktop on the "main" monitor ok.. time to go home... unplug monitor... nothing happens.. oh boy here we go... try displays again, nothing, just hangs the display.. great. crash all the apps and reboot... So it's been a trying day... What I really hope is that someone else has figured out how to avoid this PAIN. Please help with a solution that: allows me run fglrx (so I can run the games I want) allows me to hot-plug a monitor to my laptop and remove it again allows me to change the display so include the hot-plugged monitor (preferable automatically like it did with the open drivers) Next best if that's not possible: switch between laptop only display and monitor only display easily (i.e. not having to reboot/logout/suspened etc) Really appreciate the time of anyone that has a solution. Thanks in advance. Regards Brendan PS: I guess I should file a bug about this too, so some direction as to the best place to file this would be appreciated too.

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• Why unhandled exceptions are useful

  - by Simon Cooper

  It’s the bane of most programmers’ lives – an unhandled exception causes your application or webapp to crash, an ugly dialog gets displayed to the user, and they come complaining to you. Then, somehow, you need to figure out what went wrong. Hopefully, you’ve got a log file, or some other way of reporting unhandled exceptions (obligatory employer plug: SmartAssembly reports an application’s unhandled exceptions straight to you, along with the entire state of the stack and variables at that point). If not, you have to try and replicate it yourself, or do some psychic debugging to try and figure out what’s wrong. However, it’s good that the program crashed. Or, more precisely, it is correct behaviour. An unhandled exception in your application means that, somewhere in your code, there is an assumption that you made that is actually invalid. Coding assumptions Let me explain a bit more. Every method, every line of code you write, depends on implicit assumptions that you have made. Take this following simple method, that copies a collection to an array and includes an item if it isn’t in the collection already, using a supplied IEqualityComparer: public static T[] ToArrayWithItem( ICollection<T> coll, T obj, IEqualityComparer<T> comparer) { // check if the object is in collection already // using the supplied comparer foreach (var item in coll) { if (comparer.Equals(item, obj)) { // it's in the collection already // simply copy the collection to an array // and return it T[] array = new T[coll.Count]; coll.CopyTo(array, 0); return array; } } // not in the collection // copy coll to an array, and add obj to it // then return it T[] array = new T[coll.Count+1]; coll.CopyTo(array, 0); array[array.Length-1] = obj; return array; } What’s all the assumptions made by this fairly simple bit of code? coll is never null comparer is never null coll.CopyTo(array, 0) will copy all the items in the collection into the array, in the order defined for the collection, starting at the first item in the array. The enumerator for coll returns all the items in the collection, in the order defined for the collection comparer.Equals returns true if the items are equal (for whatever definition of ‘equal’ the comparer uses), false otherwise comparer.Equals, coll.CopyTo, and the coll enumerator will never throw an exception or hang for any possible input and any possible values of T coll will have less than 4 billion items in it (this is a built-in limit of the CLR) array won’t be more than 2GB, both on 32 and 64-bit systems, for any possible values of T (again, a limit of the CLR) There are no threads that will modify coll while this method is running and, more esoterically: The C# compiler will compile this code to IL according to the C# specification The CLR and JIT compiler will produce machine code to execute the IL on the user’s computer The computer will execute the machine code correctly That’s a lot of assumptions. Now, it could be that all these assumptions are valid for the situations this method is called. But if this does crash out with an exception, or crash later on, then that shows one of the assumptions has been invalidated somehow. An unhandled exception shows that your code is running in a situation which you did not anticipate, and there is something about how your code runs that you do not understand. Debugging the problem is the process of learning more about the new situation and how your code interacts with it. When you understand the problem, the solution is (usually) obvious. The solution may be a one-line fix, the rewrite of a method or class, or a large-scale refactoring of the codebase, but whatever it is, the fix for the crash will incorporate the new information you’ve gained about your own code, along with the modified assumptions. When code is running with an assumption or invariant it depended on broken, then the result is ‘undefined behaviour’. Anything can happen, up to and including formatting the entire disk or making the user’s computer sentient and start doing a good impression of Skynet. You might think that those can’t happen, but at Halting problem levels of generality, as soon as an assumption the code depended on is broken, the program can do anything. That is why it’s important to fail-fast and stop the program as soon as an invariant is broken, to minimise the damage that is done. What does this mean in practice? To start with, document and check your assumptions. As with most things, there is a level of judgement required. How you check and document your assumptions depends on how the code is used (that’s some more assumptions you’ve made), how likely it is a method will be passed invalid arguments or called in an invalid state, how likely it is the assumptions will be broken, how expensive it is to check the assumptions, and how bad things are likely to get if the assumptions are broken. Now, some assumptions you can assume unless proven otherwise. You can safely assume the C# compiler, CLR, and computer all run the method correctly, unless you have evidence of a compiler, CLR or processor bug. You can also assume that interface implementations work the way you expect them to; implementing an interface is more than simply declaring methods with certain signatures in your type. The behaviour of those methods, and how they work, is part of the interface contract as well. For example, for members of a public API, it is very important to document your assumptions and check your state before running the bulk of the method, throwing ArgumentException, ArgumentNullException, InvalidOperationException, or another exception type as appropriate if the input or state is wrong. For internal and private methods, it is less important. If a private method expects collection items in a certain order, then you don’t necessarily need to explicitly check it in code, but you can add comments or documentation specifying what state you expect the collection to be in at a certain point. That way, anyone debugging your code can immediately see what’s wrong if this does ever become an issue. You can also use DEBUG preprocessor blocks and Debug.Assert to document and check your assumptions without incurring a performance hit in release builds. On my coding soapbox… A few pet peeves of mine around assumptions. Firstly, catch-all try blocks: try { ... } catch { } A catch-all hides exceptions generated by broken assumptions, and lets the program carry on in an unknown state. Later, an exception is likely to be generated due to further broken assumptions due to the unknown state, causing difficulties when debugging as the catch-all has hidden the original problem. It’s much better to let the program crash straight away, so you know where the problem is. You should only use a catch-all if you are sure that any exception generated in the try block is safe to ignore. That’s a pretty big ask! Secondly, using as when you should be casting. Doing this: (obj as IFoo).Method(); or this: IFoo foo = obj as IFoo; ... foo.Method(); when you should be doing this: ((IFoo)obj).Method(); or this: IFoo foo = (IFoo)obj; ... foo.Method(); There’s an assumption here that obj will always implement IFoo. If it doesn’t, then by using as instead of a cast you’ve turned an obvious InvalidCastException at the point of the cast that will probably tell you what type obj actually is, into a non-obvious NullReferenceException at some later point that gives you no information at all. If you believe obj is always an IFoo, then say so in code! Let it fail-fast if not, then it’s far easier to figure out what’s wrong. Thirdly, document your assumptions. If an algorithm depends on a non-trivial relationship between several objects or variables, then say so. A single-line comment will do. Don’t leave it up to whoever’s debugging your code after you to figure it out. Conclusion It’s better to crash out and fail-fast when an assumption is broken. If it doesn’t, then there’s likely to be further crashes along the way that hide the original problem. Or, even worse, your program will be running in an undefined state, where anything can happen. Unhandled exceptions aren’t good per-se, but they give you some very useful information about your code that you didn’t know before. And that can only be a good thing.

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• Simulating an UNC path with a leading dot

  - by Uwe Keim

  Being a C# .NET Windows Forms developer, some customers are running our applications on an Apple OS X Mac inside a Parallels virtual machine. Parallels presents host folders to the guest Windows as UNC paths with a leading dot like \\.psf\Home\Some\More\Folders Now an application of us cannot handle the leading dot correctly when accessing files from these kind of shares ("Invalid URI, cannot analyze host name" exception). I want to debug and fix this issue, unfortunately I do have no Mac and Parallels around here to test it. My question is: Is there a way to "simulate" this kind of share on a normal Windows server or client so that I'll be able to debug my application with Visual Studio? What I tried so far: I already tried to edit my HOSTS file to contain an entry like # ... 127.0.0.1 .psf # ... but Windows just seems to not recognize the share at all.

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• Stopping local drive mappings from transfering to a RDP session

  - by Chad

  We have a SQL server that locally has about 6 physical drives mapped. However let's say G: is a mount point to the SAN, if I connect with my local machine and have a personal folder mapped locally as g:\userdata that transfers to the remote desktop session on the server overwriting the value of the 'NAME' of the share. Here is the kicker, the G: on the server still has the right information but has the wrong label coming from the share on my PC. Does anyone know how to prevent this from happening? My tick box for local resources is unchecked in my Microsoft RDP client.

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• External routing for local interfaces in a virtualized network

  - by Arkaitz Jimenez

  Current setup: br0| |-- tun10 -pipe-tun0(192.240.240.1) |-- tun11 -pipe-tun1(192.240.240.2) |-- tun12 -pipe-tun2(192.240.240.3) The pipe program is a custom program that forwards data back2back between two tun interfaces. The idea is puting 2 programs in .2 and .3 while keeping .1 as the local interface in the current machine. The main problem is that I want to route packets to .2 and to .3 through .1 and br0, but as they are local interfaces, the kernel ignores any routing instruction, it just delivers the packet to the proper interface. Tried iptables, but the nat table doesn't even see ping packets to those ifaces. A "ping 192.240.240.2" delivers a icmp packet with source and dest .2 to tun1, ideally it should deliver a source .1 dest .2 at tun1 through tun0-br0-tun1 Any hint? Here the output of some commands: Output

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• Woman Is the World's First Computer Programmer? [closed]

  - by Sveta Bondarenko

  This week, on 10th December, we celebrate the 197th birth anniversary of Ada Lovelace, often considered as the world's first computer programmer. Ada became famous not only as a daughter of romantic poet Lord Byron but also as an outstanding 19th century mathematician. Her works on analytical engine are recognized as the first algorithm intended to be processed by a machine. Women always played a crucial role in the computer science evolution, but unfortunately, they are considered to be not so good at programming and engineering as men. Even though the fair sex makes up a growing portion of computer and Internet users, there is still a large gender gap in the field of Computer Science. But all is not lost! According to the study women's enrollment in the computer science raised from 7 percent in 1995 to 42 percent in 2000. And it is still increasing. Soon women will take a well-deserved position among the world's top computer programmers. After all, a number of notable female computer pioneers such as Ada Lovelace, Grace Hopper, and Anita Borg have proven that women make great computer scientists. But will women make great contributions to the modern technologies industry? Or successful and famous female computer programmer is just a pipe dream?

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