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  • Clarification on the Strategy Pattern

    - by Holly
    I've just been reading through some basic design patterns, Could someone tell me if the term "strategy pattern" only applies if your implementing a completely abstract interface? What about when your children (concretes?) inherit from a parent class (the strategy?) with some implemented methods and some virtual and/or abstract functions? Otherwise the rest of the implementation, the idea that you can switch between different children at run time, is identical. This is something i'm quite familiar with, i was wondering if you would still call it the Strategy Pattern or if that term only applies to using an interface. Apologies if this question is not appropriate! Or if this is just nitpicking :) I'm still learning and i'm not really sure if design patterns are quite heavily defined within the industry or just a concept to be implemented as you like.

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  • Ubuntuone promting that my account is full, but its not....

    - by Andreas
    My Ubuntuone is prompting that my account is full. It has done that for over a week now, but its the account is not full at all... I have tried this guide: 1 down vote Can you please try the following: Quit the Ubuntu One Preferences, if open Open (Lucid): Applications-Accessories-Passwords and Encryption Keys (Maverick): System - Preferences - Password and Encryption Keys Click on the arrow next to "Passwords" Right-click on the Ubuntu One token and select "Delete" Go to https://one.ubuntu.com/account/machines/ Click on the checkbox next to your computer Click the "Remove selected computers" button (Maverick): killall ubuntu-sso-login; u1sdtool -q; u1sdtool -c (Lucid): u1sdtool -q; killall ubuntuone-login; u1sdtool -c a web page, if in Lucid, or a window, in Maverick, should open,prompting you to add your computer to your Ubuntu One account Add your computer This guide did not change any thing and i still get prompted that my account is full every time something is syncing. I also tried to create and connect to a new account butt still... the new account was doing the same. So I am now relay confused, pleas help!

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  • Kubuntu 11.10: How to remove "Search and launch"

    - by user38489
    Is it possible to remove the "Search and launch" whateveritis from my "desktop"? I've actually tried both Desktop and Netbook modes, but it stays there in both of them. I'm not afraid of editing files in the ~/.kde dir, but I would be really disappointed if this is the only way to do it. [more details/rants] I was able to wipe out several things but I've ended up with a black window that's movable (Alt-click) but not removable. Beside being surprised by the performances, I find Kubuntu extremely unfriendly, and I can't find the logic behind the items of the interface. I've tried to search for documentation, but what I've found is not updated and doesn't include the Netbook interface.

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  • DNS lookup working but nothing pinging

    - by blsub6
    I have three forward lookup zones in my DNS server. When I try pinging a server that's part of lookup zone A from a computer that's part of that same zone, I get a response. If I try pinging a server that's not in the same zone as the computer I'm pinging from, I get nothing. When I try an nslookup of the servers that are not part of the same lookup zone, the names resolve correctly. If I append the domain onto the name, I can ping it just fine. Is there a way I can fix this? or do I need to keep appending the domain onto the name if the computer I'm trying to ping is not of the same domain as me?

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  • How to run Java application in KDE with Qt-like UI?

    - by squallbayu
    Continuing my question in Install Ubuntu or Kubuntu? I have tried Kubuntu (KDE), and it was very cool as cool as Ubuntu (GNOME). but there is little problem with its user interface when we start Java application (LimeWire, Netbeans, Eclipse). User interface changed to Metal, (which I think is a bit old school). Can we run it with Qt like UI?, such as when we start Java application in Gnome (run with GTK like UI/emulation GTK like UI)? I hear there is a class for Java in order to make Java application UI like Qt, called the Qt/Jambi bindings for Java. How can we integrate it in KDE when we start Java application? My other question is if not wrong, OpenOffice was built in Java,so why OpenOffice can run with Qt like UI in KDE?

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  • Removing a malware that sets up as a system driver

    - by ereOn
    Hello, I recently tried to fix up my mother's computer which has some serious malwares. One of them apparently registered itself as system driver (tjbijkoq.sys if that can help) and after running a malware suppression tool, the computer won't boot anymore, complaining about a "critical driver that is missing". I think deleting the matching entry in the registry would just solve the problem, but obviously I can't boot up the computer (even in safe mode) to fix it. Do you guys have any experience with such an issue and how to solve this ? Thank you very much. The operating system is Windows Vista 32 bits Professional

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  • Is excessive indirection and/or redundant encapsulation a recognized concept?

    - by Omega
    I'm curious if there's a series of tendencies or anti-patterns when programming whereby a developer will always locally re-wrap external dependencies when consuming them. A slightly less vague example might be say when consuming an implementation of an interface or abstract, and mapping every touch-point locally before interacting with them. Like an overcomplicated take on composition. Given my example, would the interface not be reliable enough and any change to it never be surmountable any any level of indirection? Is this a good or a bad practice? Can it ever go too far? Does it have a proper name?

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  • Clonezilla , NLite and PCs with different hardware specs

    - by r2b2
    I used Clonezilla to create and restore images from a master computer to other workstations with the same specs. But the problem now is there are new computers whose hardware specs are different than the ones I maintained (mostly the videocard is different). Is it possible to create a customize Windows XP installer using Nlite and integrate all potential videocard and motherboard drivers ? If I then used this NLite ISO to install to a master computer which i will later clone and restore the image to other workstations, will windows xp still pick up the correct driver set? During XP installation, does the installer transfers all the drivers to the computer's harddisk? Thanks! Ryan

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  • No wireless connection using a conceptronic c54i (RT2561/RT61 rev B)

    - by jrosell
    Detected but not working. New install on ubuntu 11.10 using coneptronic C54Ri. As documentation says it uses Ralink drivers.... Any ideas why my wireless does not work? $ lspci -nn | grep -i 'ralink' 01:05.0 Network controller: Ralink corp. RT2561/RT61 rev B 802.11g ifconfig eth0 Link encap:Ethernet HWaddr 00:1e:90:e5:af:13 inet addr:192.168.0.197 Bcast:192.168.0.255 Mask:255.255.255.0 inet6 addr: fe80::21e:90ff:fee5:af13/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:28361 errors:0 dropped:0 overruns:0 frame:0 TX packets:16858 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:39812172 (39.8 MB) TX bytes:1633405 (1.6 MB) Interrupt:43 Base address:0xc000 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:80 errors:0 dropped:0 overruns:0 frame:0 TX packets:80 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:6608 (6.6 KB) TX bytes:6608 (6.6 KB) iwconfig wlan0 wlan0 IEEE 802.11abg ESSIDff/any Mode:Managed Access Point: Not-Associated Tx-Power=0 dBm Retry long limit:7 RTS thrff Fragment thrff Power Managementff lsmod | grep rt rt61pci 27493 0 crc_itu_t 12627 1 rt61pci rt2x00pci 14202 1 rt61pci rt2x00lib 48114 2 rt61pci,rt2x00pci mac80211 272785 2 rt2x00pci,rt2x00lib cfg80211 172392 2 rt2x00lib,mac80211 eeprom_93cx6 12653 1 rt61pci parport_pc 32114 1 parport 40930 3 ppdev,parport_pc,lp lsmod | grep rt [ 2497.816989] phy0 -> rt2x00pci_regbusy_read: Error - Indirect register access failed: offset=0x0000308c, value=0xffffffff [ 2497.827112] phy0 -> rt2x00pci_regbusy_read: Error - Indirect register access failed: offset=0x0000308c, value=0xffffffff [ 2497.837430] phy0 -> rt2x00pci_regbusy_read: Error - Indirect register access failed: offset=0x0000308c, value=0xffffffff [ 2497.847528] phy0 -> rt2x00pci_regbusy_read: Error - Indirect register access failed: offset=0x0000308c, value=0xffffffff [ 2497.847632] phy0 -> rt61pci_wait_bbp_ready: Error - BBP register access faile d, aborting. [ 2497.847637] phy0 -> rt61pci_set_device_state: Error - Device failed to enter state 4 (-5). sudo lshw -C network *-network DISABLED description: Wireless interface product: RT2561/RT61 rev B 802.11g vendor: Ralink corp. physical id: 5 bus info: pci@0000:01:05.0 logical name: wlan0 version: 00 serial: fa:b8:14:58:62:35 width: 32 bits clock: 33MHz capabilities: pm cap_list ethernet physical wireless configuration: broadcast=yes driver=rt61pci driverversion=3.0.0-12-generic firmware=0.8 latency=0 link=no multicast=yes wireless=IEEE 802.11abg resources: irq:16 memory:fdef8000-fdefffff iwlist scan lo Interface doesn't support scanning. eth0 Interface doesn't support scanning. wlan0 Failed to read scan data : Network is down uname -mr 3.0.0-12-generic i686 Edit 1 $ rfkill list all 0: phy0: Wireless LAN Soft blocked: no Hard blocked: no On reboot, sudo lshw -C network returns network is ok. Hovever, WPA keeps on asking the wireless key

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  • Network Drive Via Ethernet Port for Speed?

    - by Yar
    I have a Macbook with Firewire 400 and USB 2.0, so the only way I can get fast external storage is through the Ethernet port. A really fast firewire 800 drive on ANOTHER computer is actually much faster than the built-in drive (according to XBench). So I thought I would try to go one better and buy an ethernet-ready drive. I bought a Seagate GoFlex™ Home Network Storage System, and it seems like the only way to get it to work is to plug it into a router. Can this drive be used without a router (i.e., direct to computer)? Are there any drives that can be plugged directly into the ethernet port for fast access? I don't want the drive on my router: I want it on my computer. Ideally I'd need 7200rpm or faster, too... Update: Just chatted with Seagate and they said that this particular drive will not work that way. Will any others?

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  • using curl command to download file in parts from different interfaces and to run the commands simultaneously from a script

    - by jsjain007
    i wanted to download a file using curl command simultaneously in different parts using ip aliasing(virtual Ethernet ports) so what i did was pasted the commands in a text file and run but the problem as obvious since it is in a file the commands will be executed one by one so is there a way to run all those commands simultaneously. here is the command curl --interface eth0:0 --range 0,38010880 http://wdl.cache.ijinshan.com/wps/download/Linux/unstable/kingsoft-office_9.1.0.4244~a12p3_i386.deb -o kinsoft-office.part1 curl --interface eth0:1 --range 38010880 ,- http://wdl.cache.ijinshan.com/wps/download/Linux/unstable/kingsoft-office_9.1.0.4244~a12p3_i386.deb -o kinsoft-office.part2 cat kinsoft-office.part*>kinsoft-office can anyone help me to run these above 2 commands simultaneously from the script so as to increase download speed

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  • Testing a Virtualisation of a Debian Server (vmWare vSphere probably)

    - by xyza
    I'm soon getting access to a powerful root-server (quad-core, 16gb ram, 1gbit connection) where gameservers (like minecraft,counterstrike etc.) for different customers should be setup. My plan is to use programs such as vmWare vSphere to create some virtual machines for each customer. Inside such a virtual machine I'll setup the gameserver and maybe some kind of ftp server when its needed. Now that I'm kinda new to virtualisation of servers I want to test this local on my Desktop Computer. Is it possible to create a virtual machine of debian using vmWare Player on my Windows desktop computer and then install vmware vSphere in this VM to create multiple VM's inside that VM ? Or do I really need to install Debian on my desktop computer. (I want to use the time during installations etc. to work a bit at my windows installation) Some tips on virtualising debian servers are also appreciated :)

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  • Blocked port 25 on Windows 7 64 bit

    - by Michal Gow
    Strange problem. I have 2 computers connected to Wifi router. One with Windows Vista & second with 2 operating systems: SUSe Linux and Windows 7 64bit on it. Computer with Vista can connect to SMTP server of my email provider (and any other) using port 25, and can connect to a mail server using telnet mail.server.com 25 if this port is open. Computer with dual operating system can (using Linux) do the same. The same computer, with the same hardware (Wifi card etc.), and using the same WiFi router, cannot however use Port 25 and cannot Telnet into any smtp server. So the problem is in Windows 7. I did uninstall all antivirus software and disabled the firewall. The problem is still here. Is there way how find out which software is blocking this port?

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  • Anyway I can trick Carbonite into backing up an external hard drive?

    - by Brian
    I use carbonite to back up my PC (Windows XP). We were running low on disk space on our home PC (down to 15 gig) so I went out and purchased an external hard drive. However, Carbonite will not back it up. I just want the external drive to be extra disk space. From their FAQ: The current version of Carbonite backs up only the files that reside on permanent hard drives on your computer. It will not back up network drives, external drives, and NAS (network accessed storage) drives. If there are files on a remote drive that you wish to include in your Carbonite backup, you should copy the files to a folder on your local hard drive. If the files are on a shared network drive, you could install Carbonite on the computer on which the network shared drive physically exists, and back the files up directly from that computer. Check back soon for a Carbonite service plan that will allow you to back up your external drives.

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  • Kernel Panic Troubleshooting For Dummies

    - by iamsid
    I have made Ubuntu my primary OS since 10.04, and I have converted many of my friends and neighbors into Ubuntu users since then. I am the fix-it guy they approach when they encounter problems. The most frantic calls I get are when they encounter an "update-induced kernel panic." (Many human beings are allergic to command-line interfaces and search engines.) What are the step-by-step procedures to resolve an "update-induced kernel panic"?

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  • Display system information

    - by Robottinosino
    I would like output akin to that of OSX's system_profiler (https://developer.apple.com/library/mac/#documentation/Darwin/Reference/ManPages/man8/system_profiler.8.html) On Ubuntu, I have to string a few utilities togeter: uname -a, lshw, ifconfig, etc... and then extract the list of installed software packages... Is there a single, simple facade to getting human readable system info from the CLI?

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  • Wireless connection by using command screen

    - by Amadeus
    I installed Ubuntu 12.04 armhf to my beagleboard-xm and now trying to connect to a wireless network. First, I checked if I can search for available networks: ubuntu@arm:~$ iwlist scan lo Interface doesn't support scanning. usb0 Interface doesn't support scanning. wlan0 Scan completed : Cell 01 - Address: EA:7D:EF:60:C9:0B Channel:1 Frequency:2.412 GHz (Channel 1) Quality=70/70 Signal level=-23 dBm Encryption key:on ESSID:"ghostrider" Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s 24 Mb/s; 36 Mb/s; 54 Mb/s Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 48 Mb/s Mode:Ad-Hoc Extra:tsf=000000005a1ab50e Extra: Last beacon: 6242ms ago IE: Unknown: 000A67686F73747269646572 IE: Unknown: 010882848B962430486C IE: Unknown: 030101 IE: Unknown: 06020000 IE: Unknown: 2A0100 IE: Unknown: 2F0100 IE: Unknown: 32040C121860 IE: Unknown: 2D1A2C181BFF00000000000000000000000000000000000000000000 IE: Unknown: 3D16010800000000FF000000000000000000000000000000 IE: Unknown: DD09001018020000000000 Then I edited /etc/network/interfaces file to the following: root@arm:/etc/wpa_supplicant# cat /etc/network/interfaces auto lo iface lo inet loopback # The primary network interface auto eth0 iface eth0 inet dhcp # Example to keep MAC address between reboots #hwaddress ether DE:AD:BE:EF:CA:FE # WiFi Example auto wlan0 iface wlan0 inet dhcp wpa-ssid "ghostrider" wpa-psk "b34d373eb2fb836a43b0afffe783c7d0af694724506c9e77b06d1021302905bf" But I cannot still connect to the wireless network: root@arm:/etc/wpa_supplicant# iwconfig lo no wireless extensions. usb0 no wireless extensions. wlan0 IEEE 802.11bgn ESSID:off/any Mode:Managed Access Point: Not-Asociated Tx-Power=20 dBm Retry long limit:7 RTS thr:off Fragment thr:off Encryption key:off Power Management:on eth0 no wireless extensions. root@arm:/etc/network# ifup wlan0 Failed to bring up wlan0. What is wrong? Should I change any other files also? But I think it was enough. By the way if you are curious about where that wpa-psk came from: zero@ghostrider:~$ wpa_passphrase ghostrider 34bddf67c2 network={ ssid="ghostrider" #psk="34bddf67c2" psk=b34d373eb2fb836a43b0afffe783c7d0af694724506c9e77b06d1021302905bf } I will appreciate any effort to help. Regards, Amadeus ps: Also I tried to connect manually: root@arm:/etc/network# iwconfig wlan0 essid ghostrider key s:34bddf67c2 But this did not solve my problem also.

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  • VPN/Proxy server to bypass work proxy

    - by Trevor
    Here is my dilema, I am at work and can not set up a VPN connection to my VPN account in the USA. So what I would like to do is somehow have my "IE" at work connect to my home network and route any internet requests through my home PC to my VPN account, so I can access my USA Contents? So what I was thinking and I am not sure if this will work, but set up a proxy server at home on my home computer, that then routes all requests to my VPN Tunnel to the USA. Have my work computer use my home computer as the proxy and viola I have unrestricted internet access? Does that sound feasable? Thanks.

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  • Route multiple subdomains on one external ip to multiple internal ips

    - by Abenil
    i have several subdomains(git.example.org, build.example.org, etc.), i have a router with an external ip and i have several virtual machines on a host computer with internal ips. Now i want to route git.example.org to internal ip 10.0.2.1 and build.example.org to internal ip 10.0.2.2. How can I do this? I setup in the Router that all traffic on port 80 is comming to my host computer with internal ip 10.0.2.3 and installed Squid on that computer. I added the following lines to the squid.conf file: cache_peer 10.0.2.1 parent 80 0 no-query originserver name=server_1 cache_peer_domain server_1 git.example.org cache_peer 10.0.2.2 parent 80 0 no-query originserver name=server_2 cache_peer_domain server_2 build.example.org But this is not working for me. :( Any help appreciated. Regards Nils Update: Here is the solution for Apache http://serverfault.com/a/273693

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  • Auto backup a user folder to a usb when usb is plugged in

    - by Azztech Computers
    I'm a computer technician and help customers everyday with their computers and smartphones and have a really basic (i think) request but dont know how to go about it. Customer always come in with broken phones, water damage, needing updates, or just want me to backup their information. I currently have a program that i use when i backup their computers it backups their iOS folder C:\Users\USER\AppData\Roaming\Apple Computer\MobileSync\Backup but what i want is a quick easy way to do this in customers houses. What i require is a way when i plug in a USB drive it AUTOMATICALLY searches for the folder and starts transferring the folder to a predefined folder on the USB drive. This was I can just plug it in and begin work on their computer or phone without the risk of losing their information. I'm sure there is a .bat/.ini file i could use but wondering if someone has already done this or something similar as I would need it to search all the USER folders not just the one I'm logged into. Thanks in advance

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  • Windows 7 does not 'wake up' from Sleep mode

    - by the watchmaker
    I'm new to Windows 7, so I don't know if this is normal. When the computer is idle for 30 minutes, the screen goes black and no key pressing or mouse movement will bring the computer out of standby. The computer is still running (fans and hard drive noise) but it will not respond and the screen remains black. The only way to get a response is to press and hold the power button until it goes off, then switch it back on. When it turns on it says "Resuming Windows" and then goes black again. Is this normal? Can the time-out delay be increased? Is there a better workaround than switching the PC on and off?

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  • Building Interactive User Interfaces with Microsoft ASP. ...

    The ASP.NET AJAX UpdatePanel provides a quick and easy way to implement a snappier, AJAX-based user interface in an ASP.NET WebForm. In a nutshell, UpdatePanels allow page developers to refresh selected parts of the page (instead of refreshing the entire page). Typically, an UpdatePanel contains user interface elements that would normally trigger a full page postback - controls like Buttons or DropDownLists that have their <code>AutoPostBack</code> property set to True. Such controls, when placed inside an UpdatePanel, cause a partial page postback to occur. On a partial page postback only the contents of the UpdatePanel are refreshed, avoiding the "flash" of having the entire page reloaded. (For a more in-depth look at the UpdatePanel control, refer back to the

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  • dhcpd fails to start

    - by TECHPREACHER
    I recently installed Ubuntu 11.10 I then used apt-get to grab isc-dhcp3. I removed Network-Manager and manually configured my network interface eth0. In addition, I hand edited a dhcpd.conf file and designated eth0 as the listen port in /etc/default/isc-dhcp-server. However, each time I attempt to start dhcpd it fails. When I view the syslog file, the last line is as follows: "Not configured to listen on any interfaces!" My eth0 interface works fine. I can ping addresses inside and outside the network and perform DNS queries. Any help would be greatly appreciated. AJ

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  • DHCP won't start / subnetting

    - by user114371
    I recently changed the IP address on an Ubuntu 12.04 server I have in my lab, which is running isc-dhcp-server. After doing so and modifying the dhcpd.conf file, my dhcp service would not start. I basically used the same configuration, except I modified everything to use /25 scopes rather than /24. When I try to start / restart the service, I see the following: MY@ubuntuserver:~$ sudo service isc-dhcp-server restart stop: Unknown instance: isc-dhcp-server start/running, process 20918 It looks like it starts, but it isn't actually running and Webmin states that the DHCP service is not running. So my question is, does isc-dhcp-server support subnetting (CIDR) style scopes, or must they be class A / B / C scopes (doesn't seem likely)? I've double checked the interface reference (this is a VM with only one defined eth0 interface) and everything else I can thing of.

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