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  • How can I downgrade a system that accidentally had backports installed?

    - by Glyph
    I installed a fresh Ubuntu system. Somehow - possibly through my own error - the backports repository got enabled. Then I did several upgrades. I noticed that this happened when networking suddenly stopped working, "Network Settings" now has an "(alpha)" in the title bar, "System Settings" ? "Network" now displays an error dialog saying "The system network services are not compatible with this version". Now, I've disabled the backports repository, and I'd like to restore my system to its previously-functional state. My question is twofold: How do I determine which packages were installed from backports? Can I automatically re-install all those packages (and purge their configuration) to get back to a sensible state? If the answer to 2 is "no" I can probably manually purge some things and reinstall, but it would be nice to have it handled automatically. Update: It wasn't an update that broke the network; it was apt-get install indicator-network, which installed something called "connman" and removed network-manager and network-manager-gnome. Nevertheless I am leaving the question up, since I am still interested in how I can purge packages from a particular source after accidentally adding that source, and how I can determine which packages were installed from where.

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  • What is a good network for full-page rich ads?

    - by Vishnu
    I'm currently developing a website where users will be able to upload content. I would like to be able to show a full-page ad whenever someone tries to view the content. The ad should take up most of the screen, and I should be able to have a "continue to the content --" link at the top. Preferably, I want something like what is currently on Forbes (if you haven't seen it, here: http://www.forbes.com/fdc/welcome.shtml but with an ad in the black area). Of course, the most revenue is the best. Thanks.

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  • Allow access to printer between interfaces on Cisco ASA5510

    - by Jonas Stensved
    I have a Cisco ASA5510 where we have to separate networks on two separate interfaces. The networks have and should have nothing to do with each other except that network B needs to access a printer on network A. Network A: 192.168.137.0/24 Printer: 192.168.137.20 Network B: 192.168.0.0/24 I've added an incoming rule from Network A to the Printer IP in the ASDM interface but clients can't print. Our previous router was configured to let traffic through so the clients on Network B is already configured so it think it should work if the traffic is allowed. How do I let clients on Network B communicate with the printer?

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  • Creating ip alias on bonded interface ie. bond0:1

    - by bobothechimp
    System: HP Proliant DL360 G5 running CentOS 5.4 Bonded interface is working fine for a long time. I just went to add an alias the way I always have on a regular interface, and on first check it works (pinging on the local box) but it is not accessable from outside (iptables is turned off). In addition with this setup the normal network response started to decline, hanging for around a minute before I could get a prompt on login. Here are my config files: [root network-scripts]# cat ifcfg-eth0 DEVICE=eth0 BOOTPROTO=none ONBOOT=yes MASTER=bond0 SLAVE=yes USERCTL=no [root network-scripts]# cat ifcfg-eth1 DEVICE=eth1 BOOTPROTO=none ONBOOT=yes MASTER=bond0 SLAVE=yes USERCTL=no [root network-scripts]# cat ifcfg-bond0 DEVICE=bond0 BONDING_OPTS="mode=1 miimon=100" BOOTPROTO=none ONBOOT=yes NETWORK=10.2.1.0 NETMASK=255.255.255.0 IPADDR=10.2.1.11 USERCTL=no [root network-scripts]# cat ifcfg-bond0:1 DEVICE=bond0:1 BOOTPROTO=static ONBOOT=yes NETWORK=10.2.1.0 NETMASK=255.255.255.0 IPADDR=10.2.1.12 USERCTL=no any thoughts?

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  • Is there a way to play music from a server through the network and have two computers as speakers?

    - by Alvar
    Hi, I have a server (Ubuntu 8.04 server) that I want to use as a music player. I want my laptop Ubuntu 10.04 to be one speaker and my mac pro (mac os x 10.6) to be the other. Okay software is found and setup is done, (thanks for the pictures @JorgeCastro.) all of the softwares in both computers and server is setup how should I continue? http://www.pulseaudio.org/wiki/FirstSteps well if the sound is bad, is there a solution like compressing the sound files before sending them to the speaker? then you could improve sound quality and lower the data stream.

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  • why does our network printer not show up on some of our macs, but does show up on others? [on hold]

    - by peter
    We lost power in our building and now cannot get our HP laser jet 5200 to be recognized by half of our computers. We are all Macs, some running OS 10.7.5 can see the printer, others running 10.7.5 cannot, and those running 10.8.5 and 10.9 cannot. We've re-booted the router, turned off and on printer and macs—no go. The printer displays an IP address (dynamically assigned) but we can't access it. Tried to see it using CUPS—same story, can see it on some systems, not on others. Any thoughts?

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  • How often should network traffic/collisions cause SNMP Sets to fail?

    - by A. Levy
    My team has a situation where an SNMP SET will fail once every two weeks or so. Since this set happens automatically, we don't necessarily notice it immediately when it fails, and this can result in an inconsistent configuration and associated wailing and gnashing of teeth. The plan is to fix this by having our software automatically retry the SET when it fails. The problem is, we aren't sure why the failure is happening. My (extremely limited) knowledge of SNMP isn't particularly helpful in diagnosing this problem, so I thought I'd ask StackOverflow for some advice. We think that every so often a spike in network traffic will cause the SET to fail. Since SNMP uses UDP for communication, I would think it would be relatively easy for a command to be drowned out if traffic was high for a short period of time. However, I have no idea how common this is. We have a small network with a single cisco router and there are less than a dozen SNMP controlled devices on that network. In addition to the SNMP traffic, there are some status web pages being loaded from the various devices. In case it makes a difference, I believe we are using the AdventNet SNMP API version 4.0.4 for Java. Does it sound reasonable that there will be some SET commands dropped occasionally, or should we be looking for other causes?

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  • Is it better to use a Database or a data structure for network stack?

    - by poly
    I've built a multi threaded messaging application in C and I'm currently using a MySQL Memory table to save the session ID, but I'm not sure whether this was a good decision or not. It works like this, the application sends a message and saves the source session ID in the MySQL table. When the application gets the success response it will remove the session's ID from the MySQL table, or if it received an error response then it will keep the ID to be retried later. I've built it this way so that I don't need to care about building a data structure by myself, and the Database provides flexibility when it comes to querying it. Do you think this is appropriate or do I need to use something else? Please note that the application is expecting to handle a large number of transactions/sec.

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  • The network printer will only print blank pages and will not stop. What should I do?

    - by LibraryGeekAdam
    I work in a library, so we have a Ricoh printer that is networked between all of us. I just recently installed Ubuntu 11.10 64bit on my desktop and have been trying to set up the printer without success. Ubuntu found the printer immediately and allowed me to set it up. When I hit test print, I get one sheet with writing on it and then it prints blank pages and will not stop until I turn off the printer. I tried printing from a document and I get the same one page with writing and then all the blank pages again. Below is what the page says with writing on it. I'd appreciate any help anyone is willing to give. Thanks. %!PS-Adobe-3.0 %% %% mark () () (bunch of numbers) {setuserinfo} stopped cleartomark %%%!

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  • How can I make my Java desktop application to run on different computers in a network locally and updating same mysql database?

    - by JaMpa
    I have developed Java desktop application for registration of students in the computer laboratories in our college, but what I need is to make this application whenever it runs on any computer (Windows XP machines) on the laboratory each and every data filled by the college students goes to the same MySql database (through WAMP server) running on the server machine (Win Server 2003). Also, I need this application to run during booting of windows computers in the laboratory for the purpose when any student tries to switch on any PC in the comp lab before interfacing the desktop icons should sign in through user name and password when he has already registered or signing up in order for getting the access.

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  • SQL Server Integration Services package to delete files from a Network or Local path based on date

    We have a requirement to delete a group of files that are older than the specified number of days from the company file share. Due to the complex folder hierarchy and delicate nature of the data stored in these files, this task has to be originated from SQL Server. However, due to company security policy, and based on SQL Server security best practices, we blocked access to OLE Automation stored procedures, CLR features, and xp_cmdshell. Is there any way to accomplish this task without using these features?

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  • How would I broadcast a subdomain/virtual name on a local server with people connected to the same network

    - by Sarmen B.
    I have a server connected to the router which has ubuntu 12.04. It is has apache/mysql/php all installed ready to go. the folder structure is like this: /var/www -- this isnt the root -/libs -/logs -/public - this is the root -/vhosts - all subdomains go here I have a folder in vhosts named mysite. I went into /etc/apache2/sites-available and created a file and here are the contents - (vhost file). and I also added an entry in /etc/hosts file containing: 127.0.1.1 mysite.dev and I also did sudo a2ensite mysite i tried accessing the site from a computer via mysite.dev and our public ip into the server but i was not able to view it. the public directory in the structure above does display on all computers when i try our public ip. but for anything added in vhosts the site wont show. there is no domain attached its just our ip. I tried changing the port from 80 to say 9999 in the mysite file in sites-available and tried myip:9999 but that didnt work either. what am I doing wrong? edit: i forgot to mention that the server is dmzed on the router.

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  • Do Search Engine Optimization Techniques Really Boost Your Network Traffic?

    As everyone knows internet has become the best place to get all the required information. With a simple search engine query you could get list of web pages where you could get the information you are looking out for. Also, it is a very common attitude of all of us that we would like to go with the websites which are listed in the top of the search results. So, it is very important for those websites involved in that business to get their web page listed in the top position of the search results so that they could make the users looking out for the related information to get into their website.

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  • Need to setup an office network, suggest some hardware?

    - by Yegor
    We have 6 windows workstations, spread out over a fairly large area. Need to share a DSL connection (upgrading to 100/100 mbit fiber in a few months) with these machines over a 1gbit network. Also need Wifi to be available for laptop use. Plan to add 2 rackmount servers for internal use as well. Can someone suggest a decent (preferably low cost) setup that will let me achieve the stuff mentioned above.

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  • How to reference a Domain Controller out of the Local Network?

    - by Adrian
    We have multiple servers scattered over different hosting providers. For learning, experimenting and, ultimately, production purposes, I set one of them as a Domain Controller. That went well, most of our services are now authenticating via AD, which helps us a lot. What I want to do now is to simplify the authentication for the multiple servers, by making each of them look at the Domain Controller. This way, our Devs can log into (Remote Desktop) the multiple servers with the same credentials from AD. I know I have to configure each server to look at the Domain Controller. But when I try to add the Domain Controller to the Computer, it cannot find it, although the Domain Controller address is a valid, reachable internet sub-domain (as in "ad.ourcompany.com"). This is the detailed error message: Note: This information is intended for a network administrator. If you are not your network's administrator, notify the administrator that you received this information, which has been recorded in the file C:\Windows\debug\dcdiag.txt. The following error occurred when DNS was queried for the service location (SRV) resource record used to locate an Active Directory Domain Controller for domain ad.ourcompany.com: The error was: "DNS name does not exist." (error code 0x0000232B RCODE_NAME_ERROR) The query was for the SRV record for _ldap._tcp.dc._msdcs.ad.ourcompany.com Common causes of this error include the following: - The DNS SRV records required to locate a AD DC for the domain are not registered in DNS. These records are registered with a DNS server automatically when a AD DC is added to a domain. They are updated by the AD DC at set intervals. This computer is configured to use DNS servers with the following IP addresses: 109.188.207.9 109.188.207.10 - One or more of the following zones do not include delegation to its child zone: ad.ourcompany.com ourcompany.com com . (the root zone) For information about correcting this problem, click Help. What am I missing? I'm an experienced Dev, but a newbie Sysdamin experimenting with new stuff. Disclaimer All IP addresses and domains/subdomains were changed to preserve security. If by any chance you still can see private information, please let me know so that I can change it.

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  • Lync Edge and Exchange Server: how to have access to my exchange mailbox from external network and also to the OWA

    - by Garcia Julien
    I've some problem in the configuration of Exchange 2010. My topology is like that: Server1 = Domain Controller Server2 = Exchange Server Server3 = Lync Server Server4 = Lync Edge Our public address (the one accessible by outside world) is directed to Server4. I would like to have access to my exchange mailbox from external network and also to the OWA. Could you help me in the configuration of thoses servers? Thank in advance Julien

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  • Iomega Home Media Network Hard Drive: Filesystem on the disk?

    - by JJarava
    Hi all! I've got to deal with a malfunctioning "Iomega Home Media Network Hard Drive", and I was wondering if anybody knew what file system format does Iomega use on the disk? I've been trying to find the answer online, but i've got nowhere, and checking an obviously malfucntioning unit is not going to give me any assurance. Thanks a lot

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  • How do I rename a network interface using netsh?

    - by Alex Angas
    I'm building my first Windows 2008 Server Core machine (running R2) and want to rename the IPv4 network interfaces to something more meaningful. It seems most likely that this is done using netsh interface ipv4 set but looking through the help hasn't turned anything up. Could someone please advise the correct procedure?

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