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• There is a commercial tool like Xen + Remus?

  - by SoMoS

  Hello, I have a project where we need a completely redundant system like the one offered by Remus with a Xen virtualization system. I wondered if there is a system like this one built by VMWare or some other company because the project is a very critical one and we do not want to have to wait that a bug is fixed by "the community" and money is not a problem. What Remus does is to build a completely redundant system where you can shutdown one machine and the other continues the work where the other left it maintaining the network connections opened, etc Any hint? Thanks in advance.

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• ExtX file system on my usb key

  - by yves Baumes

  Hi all, if I format my usb key with an extX file system, copy some files on it and then give it to a friend for him to add files or modify existing one on this key, then he is rejected by its own system. Because its User ID (UID) nor GID are the same as mine on my machine. How to get rid of this limitation? Is it possible to disable user rights on a ext2/ext3 partition? Of course, I would really like not to rely on any other file system.

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• Can't access network share with name defined in hosts file

  - by Einar Egilsson

  I have a network share on a machine that I can only reach by IP address. I then defined an alias for the IP in my hosts file so I could use that instead of the IP but then I can't log on to the share, I just get the logon prompt again and again. So basically this: \\172.17.0.48\SomeShare works but this \\myalias\SomeShare doesn't. myalias is defined in c:\windows\system32\drivers\etc\hosts as 172.17.0.48 myalias And I can use the alias for remote desktop without problems. Can anyone tell me why this doesn't work for fileshares?

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• How can I control wireless networks in Ubuntu without Network-Manager?

  - by Solignis

  Hi there, I recently installed Ubuntu on a laptop I got. I was having issues with the network manager just like I was having in my VM where it was not setting up the hostname correctly. Anyhow now I have a problem, since it is a laptop it will be moving.... But I have no way to discover new wireless networks. Anyway I can gain that functionality back? The problem I am running into is that I need to set the DNS search and domain for the machine so I can access my network but the network-manager was overriding the settings. Any help would be much appreciated.

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• Text template or tool for documentation of computer configurations

  - by mjustin

  I regularly write and update technical documentation which will be used to set up a new virtual machine, or to have a lookup for system dependencies in networks with around 20-50 (server-side) computers. At the moment I use OpenOffice Writer with text tables, and create one document per intranet domain. To improve this documentation, I would like to collect some examples to identify areas where my documents can be improved, regarding general structure and content, to make it easy to read and use not only for me but also for technical staff, helpdesk etc. Are there simple text templates (for example for OpenOffice Writer) or tools (maybe database-driven) for structured documentation of a computer configuration? Such a template / tool should provide required and optional configuration sections, like 'operating system', 'installed services', 'mapped network drives', 'scheduled tasks', 'remote servers', 'logon user account', 'firewall settings', 'hard disk size' ... It is not so much low-level hardware docs but more infrastructure / integration information in these documents (no BIOS settings, MAC addresses).

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• How do large companies handle software updates for users without administrative rights?

  - by CT

  I just started working for a small-medium size company doing IT support. Maybe 150 or less users. Right now every user has administrative rights to their own machine. This allows them to install updates or whatever else they would like to. I'm tired of getting on user's machines that are bloated with crap they put on themselves. So my first thought would be to take away administrative rights to their computer. This would also have other advantages such as preventing a lot of drive-by malware on the web etc. The problem arises that users are unable to install updates. (Even though I find most ignore these anyway) How do large companies handle software updates on all client machines? EDIT: Windows environment. Most servers are Windows Server 2003 Enterprise. Clients are all Windows. Win XP, Vista, and 7.

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• What is a good solution for an adaptive iptables daemon?

  - by Matt

  I am running a series of web servers and already have a pretty good set of firewall rules set up, however I'm looking for something to monitor the traffic and add rules as needed. I have denyhosts monitoring for bad SSH logins, and that's great - but I'd love something I could apply to the whole machine that would help prevent bute force attacks against my web applications as well, and add rules to block IPs that display evidence of common attacks. I've seen APF, but it looks as though it hasn't been updated in several years. Is it still in use and would it be good for this? Also, what other solutions are out there that would manipulate iptables to behave in some adaptive fashion? I'm running Ubuntu Linux, if that helps.

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• Is it bad to have a very full hard drive on a high traffic database server?

  - by MikeN

  Running an Ubuntu server with MySQL for a high traffic production database server. Nothing else is running on the machine except the MySQL instance. We store daily database backups on the DB server, is there any performance hit or reason why we should keep the hard disk relatively empty? If the disk is filled up to 86%+ with the database and all of the backups, does it hurt performance at all? So would the DB server running with 86-90%+ full capacity perform less well in any way than the server running with only a 10% full disk? The total disk size on the server is over 1 TB so even 10% of the disk should be enough for basic O/S swapping and such.

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• erratic audio levels on windows vista

  - by old retired dude

  I'm somewhat hard of hearing. I've been listening to my windows Vista machine with a pair of headphones so I don't annoy the others. I have 2 issues: 1) the volume varies enormously depending on the source. Having a windows alert occur while I am listening to a DVD or Youtube is a painful experience. Is there a preferred way to set all the different audio controls so I have a more constant volume? I already have lowered the volumes of the windows alerts. 2)Is there a way to limit the volume of my headphones to protect what is left of my hearing? Is there a software solution or should I be going for a hardware limiter? thanks retired dude

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• Dell Inspirion 1525 64bit driver compatibility

  - by Tony

  Hello, Can anyone tell me what the compatibility of drivers on 64bit vista are like on the Dell Inspiron 1525. Mine is just a year old now and I want to upgrade to 64bit vista. I wondered if there's known issues with drivers that I should be aware of before upgrading? Tony PS: is the upgrade worth it? My machine has 3GB of RAM and runs a T5800 2.0GHz DuoCore Processor. I use Visual Studio often and have loads of things open at the same time a lot. That's why I'm considering an upgrade.

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• Windows Media Center won't Play MSN Video Player

  - by Chris Spicer

  My install of Windows Media Center won't play MSN Video Player videos. They appear in the main guide, but when I click on them, nothing happens. If I look on the main menu, I don't have any icons for MSN Video player there. People have suggested I try downloading updates, but that makes no difference. I have internet connectivity. My region is set to the UK (which is where I am). If I navigate to the MSN Video Player using Internet Explorer, the videos play fine. The machine is an Acer Revo RL100, running Windows 7 64-bit. Does anyone have a solution for this? Any help would be gratefully received.

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• Allowing access to MPD from local network

  - by August Karlstrom

  I have successfully installed MPD (Music Player Daemon) on my desktop computer. Everything works fine when the client runs on the same machine as the server. Now I would like to access MPD from my laptop computer which is connected (wirelessly) to the local network. In order to allow access to MPD from any computer on the local network I have added this line to /etc/hosts.allow: mpd: .local and restarted MPD. Still I get the message "error: Connection refused" when I try to access MPD with MPC (Music Player Client) from my laptop. Any clues or troubleshooting hints?

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• How do I rewrite *.example.com to www.example.com?

  - by Lekensteyn

  In my network, I've some Ubuntu machines which need to download files from nl.archive.ubuntu.com. Since it's quite a waste of time to download everything multiple times, I've setup a squid proxy for caching the data. Another use for this proxy was rewriting requests for archive.ubuntu.com or *.archive.ubuntu.com to nl.archive.ubuntu.com because this mirror is faster than the US mirrors. This has worked quite well, but after a recent install of my caching machine, the configuration was lost. I remember having a separate perl program for handling this rewrite. How do I setup such a squid proxy which rewrites the host *.example.com to www.example.com and cache the result of the latter?

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• Hosting and scaling a Facebook application in the cloud? [migrated]

  - by DhruvPathak

  We would be building a Facebook application in Django (Python), but still not sure of where to host it economically, and with a good provision to scale in case the app gets viral. Some details about the app: Would be HTML based like a website,using django as a framework. 100K is the number of expected pageviews in a day, if the app is viral. The users will not generate any media content, only some database data will be generated by them. It would be great if someone with more experience can guide on following points: A) Hosting on Google app engine or Amazon EC2 or some other cloud like RackSpace : Preferable points found in AppEngine were ease of deployment, cost effectiveness and easy scaling. For EC2: Full hold of the virtual machine,Amazon NoSQL and RDMBS database services in case we decide to use them. B) Does backend technology affect monthly cost? eg. would CPU and memory usage difference of Django over , for example , PHP framework like CodeIgnitor really make remarkable difference in running costs. (Here is the article that triggered this thought process : http://journal.dedasys.com/2010/01/12/rough-estimates-of-the-dollar-cost-of-scaling-web-platforms-part-i#comments) C) Does something like Heroku , which provides additional services over Amazon EC2, prove to be better than raw cloud management? It is not that we are trying for premature scaling, we just want to have a good start so that we are ready to handle unpredicted growth and scale.

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• Run program as admin without entering credentials? (Automatic Win7 elevation)

  - by Sam

  I'm working on my systems without admin rights, but I'd like to start sysinternals process explorer as full admin to have some debug access on my machine. Right now I run procexp.exe with parameter /e, which prompts me for admin credentials. Of course I could use runas, but for this I would need to put my admin passwort in clear text in the corresponding batch file, which is something I don't like to do. Is there a way to tell windows that this one procexp.exe is allowed to run as admin without needing to enter the credentials?

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• Server responses "bus error" to every command

  - by Temnovit

  I have a linux machine dedicated to MySQL server with a pretty high load. Today I woke up and was terrified to see, that database server is down. I could connect to it via SSH, but it was responding with bus error to each and every command. [root@r1304 home]# ls Bus error [root@r1304 home]# tail /var/log/messages Bus error [root@r1304 home]# reboot Bus error [root@r1304 home]# free -m Bus error [root@r1304 home]# chkdisk Bus error I went to Data Center and did a hard reset, which seemed to help, but after a half an hour situation reapeated and now I can't even connet via SSH anymore. Any ideas what this could be? how to diagnose such a problem and what are possible fixes? Server has 32 GB RAM, 2xSSD drives with software RAID UPDATE According to Zabbix, when MySQL died, number of processes stated to increase drammaticaly, until I did a hard reset. What could those be? Number of processes

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• Odd FTP ASCII/BINARY transfer behavior after migrating to a new server

  - by Incognita Mundi

  I recently got a dedicated server and after migration to the new machine I started noticing problems with file transfers. My FTP client, despite being set to auto, keeps uploading php files in binary mode and the content of those files is messed up. Since I mostly upload files of different kinds it would be annoying to change from binary to ASCII every single time, beside, I never had such problems. What could be the cause of this behavior? My dedicated server runs CENTOS 6.4 and the ftp server is Pure-FTPd. I tried different FTP clients and they all have the same problem so I assume is soem misconfiguration on the server side. Thanks

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• Cannot access folder locally, but can remotely

  - by Cylindric

  I'm having a peculiar problem on one of my servers at the moment, which seems to be related to authentication in some way, but I have no idea how to find the root of the problem. I have a folder on the server D:\Somefolder\Logs. If I am connected to the server via an RDP terminal, so essentially "local", I cannot access that folder - I get an access denied. If I am connecting from my machine to it using the share \server\d$\Somefolder\Logs, I can access it. I'm logging in to both machines as the same user. Permissions on the folder seem quite simple, CREATOR OWNER, SYSTEM and Administrators. I am a Domain Admin, and they are in the local "Administrators" group. It is also affecting things like access to SQL Server, so I don't think it's a simple folder-permissions thing. For example, I cannot connect SQL Management Studio to all the local SQL instances using a domain account, but I can if I connect remotely to it.

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• linux: selective sudo access for a particular command

  - by bguiz

  Hi, Is it possible to grant a particular user sudo access for one particular command only? Thanks -- More info: We farm out lengthy optimisation runs to each other's boxes over ssh. These runs take hours, sometimes days. The shutdown command can only be run in sudo. Being conscious of my environmental footprint, I would like to give the initiator(s) of these runs sudo access to the shutdown command on my box, without sudo access for everything else - so that they may shutdown my machine when they no longer need it. I am aware that I can schedule a shutdown before I leave my box, but I am looking for a better solution.

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• Dummy SMTP server as a service

  - by levidos

  I have a Windows Server 2008 machine with IIS installed which is hosting a webapp that is sending some notification mails once-in-a-while. What I'd like to do is to monitor the email sent by the application. For this I need a dummy SMTP server which intercepts messages but won't send them further but save them locally on the hard disk. I've already found some of them like Papercut, SMTP4Dev. The problem with these that I have to be logged on the server all the time which is not suitable because the server has only 2+1 TS connections. I like to run a program like these as a windows service and check the mails when I need them.

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• HP Media Smart remote access

  - by Coov

  I just purchased this box for home backups for my pc's and mac's. Everything works great accept for the remote access part. I can RD into the machine locally but I can't get to it from outside of my network. I've enabled port forwarding on my router but it doesn't seem to matter. I checked with Qwest and they don't block these ports so I'm at a loss. I do have Vonage in front of my router but I've taken it out and it didn't make a difference. I suspect I've made an error with my router setup. I'm a programmer and I'm playing in the world of the unknown here. I'm lost. Any suggestions?

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• ADD ROUTE command in windows 2008R2

  - by Mehrdad Kamelzadeh

  I don't know much about Networking, So excuse me if I am raising some basic issues. I have a LAN where there is a Windows Server 2008R2 with some clients connected to it. The clients are not joined to the domain of the Server (they are in a WORKGROUP). I have set up a VPS on the server machine (PPTP) with a Static address pool of range 10.0.0.1 - 10.0.0.10 but the LAN range itself is 192.168.1.1 - 192.168.1.254. When I connect to the server from another location over the internet, I can just see the server and I can not see the other clients which are in the same LAN as the server. what to do to see the other clients? a friend of mine said that you should use the ADD ROUTE command. Beacuse of that I used this command as my title. What would be the best way to address this problem? Thanks

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• VirtualBox CPU usage 100% on host

  - by Sarveshwar

  I have installed VirtualBox 3.1.2 (latest) on my Windows 7 (x64). In the VirtualBox I've installed Windows 7 (x64). I have 4 GB RAM installed. The guest has been assigned a 1536 MB RAM. Sometimes the CPU usage on the host goes 100%. It happens everytime, in a few minutes, after starting the guest. Then it stops responding. Then I have to "power off the machine" from the menu without doing a proper shutdown. It happens with Windows XP as guest too (even when the RAM amount assigned to it was the same). What is the problem?

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• "Cannot allocate memory" while no process seems to be using up memory

  - by omat

  I am not competent on server issues, any help is much appreciated. When try to start a python/django shell on a linux box, I am getting OSError: [Errno 12] Cannot allocate memory. free -m seems to confirm I am out of memory: total used free shared buffers cached Mem: 590 560 29 0 3 37 -/+ buffers/cache: 518 71 Swap: 0 0 0 But I cannot see what is eating up the memory with top or ps aux: PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 1 root 20 0 24336 908 0 S 0.0 0.2 0:00.68 init 2 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kthreadd 3 root 20 0 0 0 0 S 0.0 0.0 0:04.85 ksoftirqd/0 How can I identify the leak? Thanks. BTW, I am not sure if it is relevant, but the machine I am talking about is an AWS EC2 instance with Ubuntu 12 running.

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• Recently disinfected laptop still has strange issues

  - by Robsta

  This computer was heavily infected with viruses recently. The hard drive had to be taken out and cleaned by a different machine. The hard drive is now virus free, but Windows still has some strange issues that I need some help fixing. I've re-installed Chrome, but I still have issues with it. It's the same for Firefox and any other browser. When I plug in a USB flash drive, everything is fine, except when it asks me what to do with it I get what you see in the third image. I believe this is Windows 7. Any ideas? Here are the images of some of the issues:

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