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• Getting windows virtio mounted/installed for KVM

  - by Swifty

  There might be an easy answer to this. I have exhausted my search on google for a solution. Here's my problem. I need to get Windows working on a KVM vps with virtualizor CP. As I get into windows installation in VNC, there's the mandatory driver installation requirement, as HDD is in virtio. There seems to be 2 solutions: 1. Mount the virtio iso (http://alt.fedoraproject.org/pub/alt/virtio-win/latest/images/bin/) in the CD drive by unmounting Windows ISO and proceed with driver installation. 2. Create a secondary CD drive and mount the virtio iso there. Well, 1st step never seems to work. If I unload the Windows iso and load the virtio iso, it never reflects back in the VNC. Second step I have yet to be successfull. I try to create a second IDE CD ROM drive via virt-manager but the virtio (virtio-win-0.1-30.iso) iso is never listed in there, whereas i specially placed it in /var/lib/libvirt/images folder. Any suggestions on where I screwed up?

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• Inexpensive (used) hardware for Xen virtualization test?

  - by Jason Antman

  Virtualization is one of the areas where I could really use some experience. I also run quite a few services (web, mail, dns, etc.) out of my home. Since most of my hardware is getting a bit old (I'm running on stuff that was surplused years ago...) I decided that it's about time I start renewing some things, and also play around with virtualization a bit more. My plan is to setup a SAN box (simple iSCSI target, relatively inexpensive gigE switch), get a pair (for starters) of new servers, and start building some new stuff with Xen, specifically planning on playing with live migration and full virtualization. Does anyone have recommendations for used, older "servers" (really anything in a rack-mount form factor, I'm not too worried about things like iLO/iLOM for the test nodes) that support VT-x/AMD-V? I'm biased to HP, but it looks like they didn't make Proliants with VT-x/Vanderpool processors until G6 (for the DL360) or so, which is way out of my price range. I'm looking in the sub-$300 range (or less, if possible), used, probably Ebay. Any recommendations are greatly appreciated. Edit:And, to catch this before the comments start coming - these are personal systems. I have first-generation Proliants still in use (I got them as corporate surplus in 05, they've been running since then, and probably were running since 01 or 02 prior to being sold). I don't need anything shiny and new - I've got a bunch of old boxes, at least one complete replacement for every model in use, and that's fine for me (and easy on the wallet).

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• Tunnell network requests with Windows 7

  - by mark

  I've Windows 7 64bit Pro client in a private LAN behind a Netgear wgr614v7 router. I've also a remote Debian server machine outside. I'd like to tunnel all (or specified ports/protocols) over this outside server, so when I'm on the Windows machine and I request serverfault.com it would not appear from the wgr614v7 public IP but from the server. But it's not only about HTTP traffic, it's basically about everything I'd like to: other TCP ports, even UDP, etc. It must be transparent to the application, e.g. they shouldn't be aware of this. All their requests just appear as being from the server and the tunnel between them takes care about the packets. I'm aware of e.g. Putty and forwarding individual ports or using it as a socks proxy, however not many applications to support this and the support in windows itself looks non-existent to me. I might add it should be something "reasonable" easy to set up. I've heard about PPTP but I'm unsure about it's security implications (by design). Should I go for VPN? There seem to be two common solutions for Linux (OpenSwan and StrongSwan), why would I pick the one over the other? I also fear that setting up a VPN might be quite complex, OTOH maybe it's the only sane way to do the things right? Or is OpenVPN sufficient? I'm seeking for open (source) solutions, what other options to I have or which direction should I head to?

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• Creating MS Word 2010 Relative Links?

  - by leeand00

  Okay here is what I've tried so far for creating relative links in my MS Word Documents. In my document from the ribbon I select the File tab. I then select Info from the side bar. Click the properties drop down from the right hand column. (a bit difficult to find initially, since it looks like text not a drop down, but it's there). Click Advanced Properties The <document-name>.docx Properties Dialog Appears I enter .\ to specify that I want a relative path for the links in my document. I click OK. I go back into my document select some text and attempt to make a link out of it clicking the Insert tab of the ribbon, and then clicking Hyperlink. I then select a document from the current folder, and strip the full path from it, leaving just the name of the .docx file to which I wish to link. Then I click OK. The link appears, I try to click it using Ctrl+Click. I am informed that the address of the site is not valid. Check the address and try again. What could I possibly be doing wrong here? I just want a relative link. It's so easy in to do this in HTML.

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• Things to consider when building a continuous integration server?

  - by Dave

  I'm new to continuous integration, but immediately realize its value, and I want to get one set up right away. I have played with TeamCity and have it working in a VM great. Now, I don't want to spend money on another system, so I was planning on just doing the VM again on a faster machine (i.e. my dev system). There are a few questions that come to mind with this: Hard disk allocation - how big should it be? Sure, 60GB seems like more than enough, but people also used to think that we'd never need more than 64KB of RAM Backups - is it even important to back up the integration server? Sure, I guess it's nice so that one doesn't have to go through the entire configuration process again, but I would think that's about it. I could snapshot my VM every time I do a configuration change, and then do a backup of applications only (ignore the buildAgent stuff). Migration - if I want to go away from a VM on my dev system, to a new server, which maybe even runs Windows Server 2003, is it easy enough? Perhaps this is a particular point best suited for StackOverflow.

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• My PC suddenly reboots

  - by ChocoDeveloper

  Yesterday I opened my PC hub (after like, 5 years) to add more RAM and a new HDD. It was full of dust and balls of fluff, so I cleaned it a bit by blowing. I also removed the fan that was attached to the motherboard (I think it's there to cool the processor) and I cleaned it also by blowing and with a paintbrush, then put it back where it was (it had 4 weird plastic screws, it wasn't easy). Then I added 2 x 2Gib of RAM (Kingston 1333MHz), and the new HDD (Western Digital Caviar Blue 1TB SATA 3). I couldn't find another wire like the one my first disk had, which was thicker, but there was one that was more flat, so I plugged it and it worked fine (I also plugged the wire that I think is for the data, which looks like many little wires glued together). I'm running Ubuntu 12.04, and in the new disk I've just installed Windows 7. Between yesterday and today, two reboots ocurred while working on Ubuntu. I haven't used Windows 7 that much so I don't know if it will happen there too. So where can I begin to debug this?

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• how to build network across buildings ?

  - by Omie

  Hi ! I need some help in building a network between hundreds of computers spread across multiple buildings of my college. Yes, I'll be doing this as a part of my college project. Please see this image, it will give you enough idea of what I'm trying to achieve. http://i.imgur.com/rOohx.png All the computers in all buildings should be able to connect server. Once network is up, there will be a set of services over intranet and network use will be moderate. well, say there will be an email server and a http server. My point is, I cannot afford much of performance loss. It feels easy to connect computers inside 1 building to each other, however, I'm clueless as to how to connect all of them to server. I mean, just 1 cable won't be enough to connect 1 building to server, right ? How should I go with it ? I am not expecting detailed configuration. Just heads up will do :) Thanks

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• Rsync root files between systems without specifying password

  - by xpt

  This seems very tricky to me. I've set up my two systems so that I can rsync files between them as me, without specifying password. Now the the problem is to rsync files that belong to root. On both of my systems, there are no root passwords. The only way to become root is via sudo. So I can neither give a password for sudo rsyn local root@remote:, no use my ssh-agent to supply pass phrase. I don't want to set up a root password on any systems; and I do need the files to be owned by root on both systems. EDIT: Using the files that belong to root is just an example, I need a way for my unprivileged account to read/write system (including root-owned) files easily. One example is to copy my configured /root environment into the freshly-installed system. The two systems are actually two VMs under a single host, so it's not a big concern for me to copy root-owned files between them. EDIT 2: If I only want to copy my configured /root environment into the freshly-installed system, I can use tar: sudo tar cvzf - /root | ssh me@remote sudo tar xvzf - -C / But I do need rsync to update from time to time. Any easy way to make it happen? EDIT 3: Formally formulate the question Alright, it all began with the question, how to rsync files that belong to root between two systems as a normal unprivileged user, without specifying password, under the condition that, The root account is locked on both of systems. I.e., there are no root passwords. The only way to become root is via sudo (recommended security practice, see http://help.ubuntu.com/community/RootSudo) I don't want a completely passwordless sudo but don’t want to be typing passwords all the time either. The normal unprivileged user has entered their ssh pass phrase into the ssh agent. Thanks

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• Excel 2010 - more than 1 calculation within an IF() statement

  - by Da Bajan

  I have a situation where I need to calculate shipping values based on the length of the supply chain. Easy, however I need to have instances where an increased amount is required based on specific date criteria. My example is as follows: Shipvalue = 100 Date1 = 1/1/2013 (Jan) - ship 50% more than usual Date2 = 2/1/2013 (Feb) - ship 25% more than usual Date3 = 3/1/2013 (Mar) - ship 25% more than usual Supply chain length is: June - October 100 days November - March 140 days April - June 100 days The issue I have is that as there is an increase in the number of days, my formula: IF( Date1-(Supply chain length + any extra days)=today's date, shipvalue+(shipvalue X 50%), IF( Date2-(Supply chain length + any extra days)=today's date, shipvalue+(shipvalue x 50%) IF( Date2-(Supply chain length + any extra days)=today's date, shipvalue+(shipvalue x 50%), IF( preceding cell<>0,shipvalue, 0) ) ) ) Now the problem with this is that if the length of the supply chain increases then the formula misses all but the 1st increase. So, I thought of adding a variable that would be incremented and checked every time you made an increased shipping amount. So, how do I do both the calculation for the increased shipping value, and set the variable in one part of the IF statement?

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• What should I use to ping multiple IPs and get notified of time outs?

  - by HumanVirus

  I've been using MultiPing to ping hundreds of IPs (from access points and such) and check their performance (packet loss, latency) and uptime. The program is very easy to use, but I was wondering if someone could recommend me something that would work better and that would also work in Linux. The features I'm looking for are: Notification Types: At least desktop notifications and SMS, but it would be great if it also had e-mail, IM, or other types of notifications. (MultiPing has some of these, but they don't work too well.) Being notified about the root problem only: Since some devices are dependent on others, I'd like to be notified only about the root problem. E.g. Let's say I have A[x.x.x.222]B[x.x.x.33C[x.x.x.44]D[x.x.x.55], and B goes down, therefore C and D will also be down. Is it possible to get a notification only about B being down? Light on resources. Ideally multiplatform or at least available for both Linux and Windows. I've heard about Nagios and Shinken being used for monitoring. Would you recommend that I use something of the sort or would that be too much for my needs? If using Nagios, Shinken, or similar software is recommended, can anyone tell me what sites I should go to or what books I should get that would be good for someone who is totally new at this? I'd appreciate any suggestions.

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• How to fix "The connection was restarted"?

  - by Altar

  I have a php script with ajax. Few days ago, without making any changes, the script stopped working. The script is working sometimes but it is very slow. Other times it doesn't load completely. Yet other times it loads and empty page or it shows a "The connection was restarted" message. We have tried loading the page from 4 different computers in two different countries (two different ISPs). There is nothing relevant in the server's log. We contacted iPage.com hosting support. We sent screenshots. And all we manage to get from them was an incomplete screenshot and the message 'We tested. The page loads'. So, they won't admit the fault. It looks like they loaded the page once and declared it is working and went back to playing solitaire. I know their support. We had all kind of problems with iPage hosting. My questions are: 1. There is any way to make this error more easy to reproduce? I mean instead of fixing the error to get it appear more often. 2. There is any way to test a server response, to see if it drops connections?

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• OSX server setup suggestions

  - by Tom

  I am looking into the possibility to setup an OSX server for my employees, and would like some input on what is the best approach to meet my needs, and perhaps some suggestions if I am moving in the wrong direction. I am thinking of a Mac Mini OSX server, and are not sure if my needs will be met, and what possibilities are out there. I want these capabilities: - Groups/Users managed on server - Shared folders and private folders for users/groups - Access to activated services - Server hosting software for the users (developing tools ++) - Similar to Windows Terminal Server - Virtual desktop environment (both local and over internet/VPN) - Possible to access trough Mac and Windows The reason I am looking at OSX server is that my employees almost only work in OSX environment, and I want to offer the capabilities to logon to the server trough some kind of terminal software, and have full access to their work OSX environment and software on their mac or pc, from anywhere they might be. Instead of having to have multiple setups and need for spending alot of time installing and setting up needed software on every client. This is a small business, where some work on local network, and others from the internet, preferably trough VPN. But a terminal server solution, that are fast and easy to manage would be perfect for our needs. So if anyone have any experience with a similar setup, please let me know what you did, and your experiences with your setup.

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• What apps can you only get on Mac and not Windows?

  - by ytk

  What apps do you absolutely have to use a Mac to run, and there are no decent Windows PC equivalent? This is not a religious war. Please be specific and practical It doesn't have to be a direct 1-2-1 comparison, but overall usefulness to the task I'll start off with a few: KeyNote -- the animations are quite cool and not available in PowerPoint iTune's photo sync -- on Windows it makes copy of all the photos you want to sync, effectively double the space taken up by your photos. On a Mac it's easier as long as you use iPhoto Keychain -- a centralized password manager tied to the OS. The benefit of this is you don't have to set a Master Password (like Firefox) which you need to enter when starting the browser. And it doesn't reveal your password (like Chrome, which makes no effort in hiding the password you have stored in Options) Time Machine -- 0-configuration backup in the background. Easy interface for restoring a file, or even just a contact in the address book. Text-to-speech -- works in any program, and sounds better than Windows computer voice Quick View -- press space bar to preview a file. Windows95 had quick view, but was removed.

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• Easiest way to find out if user has either Windows 7 or Vista (through telephone support)?

  - by Rabarberski

  If you have to provide some initial troubleshooting support by phone [or email], and you don't have access to the PC itself, what is the easiest and most foolproof question to find out if the 'dumb' user is using either Windows 7 or Windows Vista? For example: determining if the user has either Windows XP or Windows Vista/7 is easy. Just ask the user if the button at the left bottom corner is (a) either square with the word 'Start' on it, or (b) it is a round button. But how to determine the difference between Vista and 7? Edit: For all the existing answers the user has to type something, and do it correctly. Sometimes even that is already hard for a computer illiterate user. My XP example just requires looking. If it exists (although I am afraid it doesn't), I think a solution that is just based on something this is visually different between Vista and 7 would stand above all others. (Which makes Dan's suggestion to turn over the box and look at the label" not so stupid). Perhaps the small 'show desktop' rectangle at the right side of the task bar (was that present in Vista)?

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• Multiboot USB (OSX only): How to customize partition name?

  - by wrk2bike

  Trying to deal with all the Mac OSX recovery disks I've got by moving them to bootable USB images. I've got a big USB drive with multiple partitions for each recovery disk, and it's easy to use Disk Utility to "restore" the recovery DVD to a partition. When I boot my target Mac while holding down the Alt key, I can see all my bootable images and they work great. Problem is, they've all got the same name: "Mac OS X Install DVD." I manage Macs of various vintages. If my target Mac needs 10.6.3 for example, my only option seems to be to try each one until I get past the "Mac OSX can't be installed on this computer" message. I originally named my partitions with the OSX revision number, but that name is replaced by the disk image name during Disk Utility restore. Is there any way to customize the name during or after Disk Utility restore? I tried making a new DVD image on disk first and renaming it, but when I restore it to my recovery partition it has the original name. EDIT: After booting to the wrong partition, and getting the "..can't be installed" message, I can open the Startup Disk menu and see the other partitions - and as I select each one, the info at the bottom indicates which OS revision is on that partition. So I know the info is in there! Just want it at the boot screen if possible.

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• Jabber client for windows 7

  - by Anders

  I am looking for a jabber client with some specific functions. I have spent 1½ day looking for one and it is getting tiresome. Clients that I have been using, that have what I need, but I am not interesting for a reason in are: Pidgin, does not show complete messages in their popups. Miranda IM, I have a constant disconnect issue that does not seem to be resolved in my case. What I need are: Popups A popup that shows broadcasts to users. A popup that show when my username is typed in a conference chat. I need to be able to view the full message in the popup. No configuration of a theme to make this enabled, or if there is a working theme for it already. Preferable placement is on the top right of the screen. Able to 'popup' when running full screen applications, much like games. Conferences Easy access to bookmarked conferences. I do not want to go through submenus to rejoin a disconnected or closed conference. If I close the conference window I want to be connected to the conference until I exit the client. Tabbed interface. Configuration Sober configurations, options are great but there is a limit and the above needs to be availble in the options in a understandable manner. What I wish for: MSN Not needed! If it is avaible then it is a big plus. Facebook Not needed! If it is avaible then it is a big plus. Conferences/chats Not needed! Eyecandy is always nice.

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• building a debian base image

  - by Michael

  Is there a preferred way to create base images for Debian-based customized installations? We are currently going with multistrap but although it's better than hand-crafted chroot stuff, it still has a lot of edges and corners. Is there a more reliable and less error-prone way to produce a root filesystem of a Debian installation with some additional .debs installed? (I don't want to send out a Debian installer with a preseed file though.) Addendum 1: To clarify things a bit: We are delivering some kind of software appliance to our customers. That is, a debian operating system, with some additional software packages -- both our own and third-party ones -- and some configuration changes. To ease the installation process, we have an installer that does nothing more than partitioning, copying files to the partitions and setting up grub. So it's basically an image-based installer. So we are basically running the debian installation ourselves and just distribute the already installed operating system. The question is about the installation part. I want to have that as easy and robust as possible, and of course, it should be an automated process.

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• Shell replacement for kiosk environment with desktop icons

  - by tuesprem

  I have to deploy around 80 touch-screen terminals for my company. We're going to run several Windows applications on those terminals and they'll be operated by touch input only. I basically want those machines to run in a kiosk mode, so employees won't be able to launch any programs than the ones they're supposed to (also, this will hide the task bar/start menu, which will give it a much nicer, corporate look). There's usually one app that should automatically launch on startup and other apps that can be launched from the desktop. I've tried to accomplish this (under Windows 7 Pro) with a custom shell replacement. This removes the task bar/start menu like I described earlier. I used an AutoHotKey script for this, because it's easy to, for instance, define hotkeys so admins will still be able to launch stuff like Windows Explorer (okay, I know I could just launch it from the task manager [Ctrl+Shift+Esc] but I'm considering locking that as well). So far so good. Some problems though: No desktop icons. Needed to launch apps from the desktop. No wallpaper. Required for CI. Is there any way around this? I wouldn't mind using another shell replacement, as long as it's reasonably lightweight. I'd love to get the wallpaper and desktop icons to show with something like AutoHotKey though. Thanks!

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• What is a good replacement for StumbleUpon's Share feature?

  - by Mofoo

  I've been using Firefox + StumbleUpon's Share feature with my friends for years now. It is a perfect way of sharing links directly with your friends. You first need to be Following each other and then on the SU toolbar, you can "Share" with your list of friends. You can even include a personal message. The friend will receive a notification with # of pending shares in their toolbar (bold & red). They click the stumble button and it will navigate to the site plus show a yellow bar with your message. I literally use it daily. But then Chrome came along and beat the tar out of Firefox (and other browsers) in terms of usability and performance. But it doesn't (and never will according to Google) allow toolbars. StumbleUpon's solution in Chrome is a fake toolbar (html) that gets injected into the page you're viewing. It's buggy and performance is low. Overall it's not an acceptable solution. I'm looking for a replacement with something that is just as easy to send/receive links. I was thinking of Twitter DM's and using a bookmarklet, but I wanted to survey the collective for other options Thanks in advance for your input!

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• using virtual machine like mySql server

  - by ffmm

  i'm developing a java program and i need a database. Now i'm using MAMP and it's pretty easy but i would have a virtual machine (ubuntu server) and i need to connect my java program with this virtual machine using vitualBox. the situation: I installed VirtualBox on my mac and I installed an ubuntu-server machine set "bridge adapter" in the network settings of VB I installed mysql on ubuntu-server and i created a simple database (all work well by ubuntu) doing ifconfig by ubuntu I get the ip: 192.168.1.217 so in the java program i made this function: public static Connection connect(String host, int port, String dbName, String user, String passwd) { Connection dbConnection = null; try { String dbString = null; Class.forName("com.mysql.jdbc.Driver").newInstance(); dbString = "jdbc:mysql://" + host + ":" + port + "/" + dbName; dbConnection = DriverManager.getConnection(dbString, user, passwd); } catch (Exception e) { System.err.println("Failed to connect with the DB"); e.printStackTrace(); } return dbConnection; } and in the main() i use: Connection con = connect(1, "192.168.1.217", 3306, "Ciao", "root", "cocacola"); 3306 was a default value. I don't know if is correct, it works on mamp, but…. how I can find the correct port that I have to use with VB? when I ran the program I get the catch excepion… what's wrong? ps: i have to install apache o something else?

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• Can I sort files A-Z and at the same time Z-A?

  - by The_Buff

  I am trying to sort and rename a large number of files that are labeled #####_## The LEFT side of the underscore are numbers (e.g., 32956715, 32956810, etc.) that do not repeat. The RIGHT side of the underscore are also numbers (e.g., 1, 2, 3, etc.) and they do repeat. (The left side is the number of a scan and the right side is the page of that particular scan.) I would like to be able to sort the left side of the underscore Z-A and the right side A-Z. Example: 3_1 3_2 3_3 2_1 2_2 2_3 1_1 1_2 1_3 I am using ReNamer by den4b (easily the best free renamer out there). It supports regular expressions so I believe there should be an easy way to do this, but I don't know how. (I've been trying to learn regular expressions but I don't use them enough to retain anything.) I'm open for any suggestions that achieve the same result. I've spent enough time trying to figure it out that I could have probably just sorted them myself already but this is a reccuring problem so hopefully someone has a solution that will save me lots of time in the long run. Thank You!

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• Discover intended Foreign Keys from JOINS in scripts

  - by Jason

  I'm inheriting a database that has 400 tables and only 150 foreign key constraints registered. Knowing what I do about the application and looking at the table columns, it's easy to say that there ought to be a lot more. I'm afraid that the current application software will break if I started adding the missing FKs because the developers have probably come to rely on this "freedom", but step one in fixing the problem is to come up with the list of missing FKs so we can evaluate them as a team. To make matters worse, the referencing columns don't share a naming convention. The relationships ARE coded informally into the hundreds of ad-hoc queries and stored procedures, so my hope is to parse these files programmatically looking for JOINS between actual tables (but not table variables, etc). Challenges I foresee in this approach are: newlines, optional aliases and table hints, alias resolution. Any better ideas? (Besides quitting) Are there any pre-built tools that can solve this? I don't think regex can handle this. Do you disagree? SQL Parsers? I tried using Microsoft.SqlServer.Management.SqlParser.Parser but all that is exposed is the lexer - can't get an AST out of it - all that stuff is internal.

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• My server is taking too long to respond when I connect to it outside the local network [closed]

  - by Buzu

  I have my local server online most of the time because it is easy for clients to access a url and see how their project is coming along. They can see updates in real time. However, I got a message from one of my clients saying that the server was not responding. I have a hosts file, and in that file I have my server's address pointed to the local ip. This is because some problem with the ftp. Due to this setup, I had not noticed that the server was not accessible from outside the local network. The address is http://imbuzu.dyndns.info SSH works fine, I can connect from my windows machine to the server, but HTTP does not. The server is taking too long to respond. Looking at the logs, I see that the last incoming connection to the server from outside the network is this: 77.242.153.180 - - [04/Dec/2012:12:11:01 -0800] "\xce\x89\x8d\x85b\ro" 400 317 "-" "-" I'm going to restart the server, but I doubt that will have any effect on it. --EDIT-- I restarted the server, and it did not help. Also, I pinged the server and it seems to be resolving correctly.

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• where are the default ulimit values set? (linux, centos)

  - by nomercysir

  I have two CentOS (5) servers with nearly identical specs. When I login and do: ulimit -u on one machine, I get unlimited and on the other, 77824 When I run a cron like * * * * * ulimit -u > ulimit.txt I get the same results (unlimited, 77824). I am trying to determine where these are set so that I can alter them. They are not set in any of my profiles (.bashrc, /etc/profile, etc .. these wouldn't affect cron anyway) nor in /etc/security/limits.conf (which is empty). I have scoured google and even gone so far as to do grep -Ir 77824 / but nothing has turned up so far. I don't understand how these machines could have come preset with different limits. I am actually wondering not for these machines, but for a different (CentOS 6) machine which has a limit of 1024, which is far too small. I need to run cron jobs with a higher limit and the only way I know how to set that is in the cron job itself. That's ok, but I'd rather set it system wide so it's not as hacky. Thanks for any help. This seems like it should be easy (NOT) EDIT -- SOLVED Ok, I figured this out. It seems to be an issue either with CentOS 6 or perhaps my machine configuration. On the CentOS 5 configuration, I can set in /etc/security/limits.conf: * - nproc unlimited and that would effectively update the accounts and cron limits. However, this does not work in my CentOS 6 box. Instead, I must do: myname1 - nproc unlimited myname2 - nproc unlimited ... And things work as expected. Maybe the UID specification works to, but the wildcard (*) definitely DOES NOT here. Oddly, wildcards DO work for the 'nofile' limit. I still would love to know where the default values are actually coming from, because by default, this file is empty and I couldn't see why I had different defaults for the two CentOS boxes, which had identical hardware and were from the same provider.

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• what is best multi-server configuration with OpenVPN

  - by sebut

  We have a number of Database severs running MongoDB on Debian plus a number of Application servers also on Debian. The db servers hold replicating db clusters, so they need to talk to each other. Application servers need to talk to all db servers (for reasons of fault tolerance). The servers are potentially spread across multiple hosting centers, so we need secure channels between all servers. The number of servers is bound to grow, so we need a VPN solution that's easy to maintain and expand. This is why I feel that SSH that we use for testing might not be up to the task and OpenVPN seems the way to go. I have ruled out TAP, since I understand that this would mean all traffic going to all the servers - perhaps this is a misunderstanding and TAP acts more like a switch? With TUN devices I imagine that all DB servers would live in their own separate subnet, they would also need a client configured to be able to connect to each of their peers. The application servers could live in a common subnet range with a client config only. Does this sound like a reasonable setup? Strangely, on the web I did not find anything about multi-server with OpenVPN. Thanks for all insights and ideas!

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