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• Let&rsquo;s keep informed with &ldquo;Data Explorer&rdquo;

  - by Luca Zavarella

  At Pass Summit 2011 a new project was announced. It’s a Microsoft SQL Azure Lab and its codename is Microsoft “Data Explorer”. According to the official blog (http://blogs.msdn.com/b/dataexplorer/), this new tool provides an innovative way to acquire new knowledge from the data that interest you. In a nutshell, Data Explorer allows you to combine data from multiple sources, to publish and share the result. In addition, you can generate data streams in the RESTful open format (Open Data Protocol), and they can then be used by other applications. Nonetheless we can still use Excel or PowerPivot to analyze the results. Sources can be varied: Excel spreadsheets, text files, databases, Windows Azure Marketplace, etc.. For those who are not familiar with this resource, I strongly suggest you to keep an eye on the data services available to the Marketplace: https://datamarket.azure.com/browse/Data To tell the truth, as I read the above blog post, I was tempted to think of the Data Explorer as a "SSIS on Azure" addressed to the Power User. In fact, reading the response from Tim Mallalieu (Group Program Manager of Data Explorer) to the comment made to his post, I had a positive response to my first impression: “…we originally thinking of ourselves as Self-Service ETL. As we talked to more folks and started partnering with other teams we realized that would be an area that we can add value but that there were more opportunities emerging.” The typical operations of the ETL phase ( processing and organization of data in different formats) can be obtained thanks to Data Explorer Mashup. This is an image of the tool: The flexibility in the manipulation of information is given by Data Explorer Formula Language. This is a formula-based Excel-style specific language: Anyone wishing to know more can check the project page in addition to aforementioned blog: http://www.microsoft.com/en-us/sqlazurelabs/labs/dataexplorer.aspx In light of this new project, there is no doubt about the intention of Microsoft to get closer and closer to the Power User, providing him flexible and very easy to use tools for data analysis. The prime example of this is PowerPivot. The question that remains is always the same: having in a company more Power User will implicitly mean having different data models representing the same reality. But this would inevitably lead to anarchical data management... What do you think about that?

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• What is the right way to group this project into classes?

  - by sigil

  I originally asked this on SO, where it was closed and recommended that I ask it here instead. I'm trying to figure out how to group all the functions necessary for my project into classes. The goal of the project is to execute the following process: Get the user's FTP credentials (username & password). Check to make sure the credentials establish a valid connection to the FTP server. Query several Sharepoint lists and join the results of those queries to create a list of items that need to have action taken on them. Each item in the list has a folder. For each item: Zip the contents of the folder. Upload the folder to the FTP server using SFTP Update the item's Sharepoint data. Email the user an Excel report showing, e.g., Items without folder paths Items that failed to zip or upload Steps 2-5 are performed on a periodic basis; if step 2 returns an invalid connection, the user is alerted and the process returns to step 1. If at any point the user presses a certain key, the process terminates. I've defined the following set of classes, each of which is in its own .cs file: SFTP: file transfer processes DataHandler: Sharepoint data retrieval/querying/updating processes. Also makes and uploads the zip files. Exceptions: Not just one class, this is the .cs file where I have all of my exception classes. Report: Builds and sends the report. Program: The main class for running the program. I recognize that the DataHandler class is a god object, but I don't have a good idea of how to refactor it. I feel like it should be more fine-grained than just breaking it into Sharepoint, Zip, and Upload, but maybe that's it. Also, I haven't yet worked out how to combine the periodic behavior with the "wait for user input at any point in the process" part; I think that involves threads, which means other classes to manage the threads... I'm not that well-versed in design patterns, but is there one that fits this project well? If this is too big of a topic to neatly explain in an SO answer, I'll also accept a link to a good tutorial on what I'm trying to do here.

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• Want to make RTS strategy game, good starting point...?

  - by NOLANDI

  everybody! I find this community because I did research about game developing topics. So I decide to register on this community and ask for your opinion. I am not begineer in computer stuffs, and I know logic of programming language. I have little knowlegde of C, C++, Started to learn C#...but I was always oriented about other areas of IT. Amateur for game making but not in IT general! I am interested to make RTS strategy video game, isometric camera view (like PC GAME COMMANDOS for example)...so I started to read many books about DirectX, XNA, OpenGL, C#, AI programming...so I want to know where is good starting point for making this game genre. I want to use C# for this project, not C++, since I always had trouble with it, because it is too complicated. I see good oportunity for learning C#, since it has more object-oriented concept, with much less code and easy readible code for writing. Beside of that I know that C++ is the more powerful language until today. So I want to use DirectX and C# for my project. But it will required more time for sure, to learn it. I have trouble with finding books for c# & DirectX (I found just one), but in every next book, it is programming in c++! I read many web sites and they mentioned Slim DX, and in generaly, other articles which I read tells that it is possible to make good game with combination c# and directX, but...I don't have enough information about all this stuffs, so I became confused! It is really hard to have wish to learn c++ from scratch, since I started c# and I like it really...I don't try OpenGL, but I am already familiar with DirectX (some beginning stuffs), and I think that it is good and interesting. So, I decide to choose between maybe Unity3d and XNA first. XNA...hm, it sound that it is not bad solution, but I heard that it is already overcome technology, and I think that it is better to wait with XNA, until I try to make something with DirectX and C#, at first. But I dont know it is possible to make strategy game in XNA?! Maybe I am wrong. I also, find Unity 3D game engine and I find that I could programming there in C#, but many all examples are written in Javascript (Digital tutors videos)...But I generaly have wish to learn it too, because it allows to export games to mobile phones, there a lot of documentations, it is free, etc... I want to find best way to learn C# and DirectX, and make this game, but I dont know if it's possible to combine?! But maybe is good to first try Unity and XNA, because I am beginner?! Thank you all! I am willing to hear your expirience.

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• Spreadsheet RDBMS

  - by John Nilsson

  I'm looking for a software (or set of software) that will let me combine spreadsheet and database workflows. Data entry in spreadsheet to enable simple entry from clipboard, analysis based on joins, unions and aggregates and pivot/data pilot summaries. So far I've only found either spreadsheets OR db applications but no good combination. OO base with calc for tables doesn't support aggregates f.ex. Google Spreadsheet + Visualizaion API doesn't support unions or joins, zoho db doesn't let me paste from clipboard. Any hints on software that could be used? Basically I'm trying to do some analysis of my personal bank transactions. Problem 1, ETL. The data has to be moved from my bank to a database. My current solution is to manually copy and paste the data into one spread sheet per account from my internet bank. Pains: Not very scriptable. Lots of scrolling to reach the point to paste. Have to apply sorting and formatting to the pasted data each time. Problem 2, analysis. I then want to aggregate the different accounts in one sweep to track transfers per type of transfer over all accounts. The actual aggregation is still unsolved because I can't find a UNION equivalent in the spreadsheets I've tried.

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• So Close: How to get this SSH login working (.bashrc)

  - by This_Is_Fun

  Objective: SSH login ( + eliminate warning message) / run 2 commands / stay logged in: EDIT: Oops, I made a mistake (see below): This code does ~95% of what I wanted to do # .bashrc # Run two commands and stay logged in to new server. alias gr='ssh -t -p 5xx4x [email protected] 2> /dev/null "cd /var; ls; /bin/bash -i"' Now, after successful login / verify user logged in = root pts/0 2011-01-30 22:09 Try to 'logout' = bash: logout: not login shell: use `exit' I seem to have full root access w/o being logged into the shell? (The " /bin/bash -i " was added to 'Stay logged in' but doesn't work quite as expected) FYI: The question is "How to get this SSH login working" & it is mostly solved, sorry I made a mess... ... .. . Original Question Here: # .bashrc # Run two commands and stay logged in to new server. alias gr='ssh -t -p 5xx4x [email protected] "cd /var; ls; /bin/bash -i"' # (hack) Hide "map back to the address - POSSIBLE BREAK-IN ATTEMPT!" message. alias gr='ssh -p 5xx4x [email protected] 2> /dev/null' Both examples 'work' as shown; When I try to add the ' 2 /dev/null ' to the first example, then the whole thing breaks. I'm out of time trying to solve the warning message other ways, so is it possible to combine both examples to make example #1 work w/o the warning message? Thank you. ps. If you also know a proper way to kill the login warning message, please do tell (the 'standard' "edit host file" advice isn't working for me)

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• Switch Text Paragraphs in OpenOfficeOrg Writer mailmerge

  - by Glen S. Dalton

  I am using mailmerge to write the same letter with minor differenes to many peolpe. I experienced that switching text paragraphs depending on database values was not easy for me. I ended up putting huge text paragraphs into the database becaus switching did not really work for me. Actually I dont' understand how writer does it and maybe the boolean evaluation is buggy? There is some possibility making paragraphs invisible depending on database fields, but it was frustrating. After marking a paragraph as invisible (depending on a condition) it went invisible in the main document and did not come back, I lost the content. An example in pseudocode of what I want in my mailmerge document: {if [[balance]] 10} We owe you money. Please can you send your bank details. {end if} {if [[balance]] < -10} Please transfer the remaining amount to our banc account 123... {end if} Maybe this could be done with makros? But how to combine makros with mailmerge? Can you tell me what are the pitfalls and how to master them? I once did this with ms word, it was a lot easier. The normal mailmerge (including database fields in the letters) works fine for me in OpenOffice writer.

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• from svn to git (+ LDAP + password-less updates + passworded access control)

  - by Jayen

  We have an SVN setup and there are some things we dislike about it and some things we like about it. We want to move to git, but we're not sure exactly what setup will work for us. We're currently using SVN (w/ Authz) + Apache (w/ WebDAV & LDAP). Hook to update the live site [like] Live site update requires no additional interaction [like] Live site update uses stored password [dislike] Commits require centralized-password authentication [like] Commit from live site changes stored credentials [dislike] Access control (per repository) for commits [like] Point 5 above is the one that keeps stuffing us up. Someone makes a commit from the live site and then the hook breaks. We're thinking to use gitosis/gitolite to get access control, but as they use ssh keys, we won't be requiring passwords. We're also thinking to use git-http-backend, and use Apache for authentication, but then do we lose access control? Can the live site be automatically updated from a hook if Apache requires authentication? Can we combine git-http-backend and gitosis/gitolite somehow? Can we store http credentials with git?

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• Exim and receiving email with large recipient lists

  - by AceJordin

  I have Exim4 running on Debian configured to receive mail on multiple domains. Exim is set to forward all email that is received to one of the domains to another box. This box is configured with a catchall mailbox that everything goes in. My issue is that when an email is sent to the domain, which contains a large amount of addresses (all to the same domain, but different users), Exim will receive the single email over multiple connections. This means that the catchall mailbox receives multiple copies of the single email all containing the full recipient list. For example, I was able to reproduce it by sending an email from my gmail account that contained 500 recipients (eg [email protected]; [email protected]; [email protected]; etc. for a total of 500). Exim received the message as 20 messages (25 recipients per; appears to be a gmail server setting). So the catchall mailbox received 20 messages, each containing all 500 addresses. I'm pretty sure I understand why this is happening but is there any way I can configure Exim to only receive it once, or to combine it into one? Is there anything that can be done on my end, or am I at the mercy of the sending email server? This is causing havoc with a process that polls the catchall mailbox and parses each recipient in each email.

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• Is there any way to detect when nginx has completed a graceful shutdown?

  - by Daniel Vandersluis

  I have a ruby on rails application which is running on passenger and nginx, with one main webserver and multiple application servers. I am trying to update my deployment process in order to minimize (or ideally, remove) any downtime caused by the deployment. The main roadblock right now is that passenger takes some time to restart (ie. reload the application), so in order to get around this, I want to stagger my restarts so that only one app server gets restart at a time. In order to do this without losing any long running passenger processes, I am thinking I need to gracefully shutdown the app server's nginx instance, which will cause it to no longer accept new connections but continue to process the existing ones; as well, HAProxy will detect that the app server is down and route new requests to the other server. However, assuming that there is a long-running process, I am not sure how to detect when the graceful shutdown has completed so that I can start it back up. Since the shutdown is caused by sending a signal (ie. kill -QUIT $( cat /var/run/nginx.pid )), and the kill command will return immediately, I cannot combine commands (ie. kill ... && touch restarted), as the touch command will execute immediately, even if nginx hasn't completed its shutdown. Is there any good way to do this?

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• How can I get my routers to forward ports correctly?

  - by Giffyguy

  My network currently looks like this (simplified): Note that Router #2 is connected to the LAN interface of Router #1. This should be familiar to anyone who has seen a standard static-IP setup with an additional firewall for a residence or other small building. Router #1 is actually my cable gateway, but since it is a fully functional router/firewall, I am going to refer to it as a router. Now, I need to open various ports in both firewalls for incoming communication to my server - port 80 is a good example. So I've opened up port 80 in Router #2, and so far all incoming traffic at the public IP X.X.X.129 is being routed correctly. The problem is that I also need my server to respond to incoming traffic at the public IP X.X.X.130 on the WAN interface of Router #1. Naturally, I can't just tell Router #1 to forward port 80 to another public IP. Port forwarding is only supported when the traffic is being directed to the LAN subnet. I am willing to restructure my network topology if required, with the following conditions: Router #1 cannot have its WAN IP reassigned - X.X.X.130 is mandatory. Router #1 cannot be moved or disconnected from the cloud. The server cannot be given a second IP address. I would prefer the server to have a private IP address - e.g. 10.0.0.10 I'd like to keep Router #2, but it can have a private IP - e.g. 10.0.1.10 Following these rules, I need to get my server to receive incoming traffic on port 80 from both public IP addresses. Does anyone on SU know if this is possible? So far my only theories have been to set up a static route on either router, or to somehow combine my two subnets into a single subnet.

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• Safari's location bar (auto-suggest and web search)

  - by Lri

  Auto-suggest don't seem to work for queries with spaces. Am I missing something? If you select an item from the suggestion list that was matched by its title, the title is filled in before the address. Can you change it to work like in other browsers? SMRT disables searching by title completely. Can you combine Top Hit, History and Bookmarks into a single section? The preferences starting with DebugSafari4 don't work anymore. (Like DebugSafari4IncludeFancyURLCompletionList.) Can you direct unresolved addresses to something like google.com/search?q=?&btnI instead of ?.com? Like by changing keyword.URL in Firefox. Can you remove or hide the web search field? In Camino, Cruz and Fluid it can be resized to zero width. You can't circumvent the normal maximum ratio with InputFieldWidthRatio. AddressBarIncludesGoogle doesn't appear do anything in the current version. Are there fixes or workarounds to any of these? I'm lumping these issues together, because they are closely related — a lot of them were introduced when the location bar was redesigned in Safari 5. I'm also hoping to find something like an extension or a plugin that would replace the standard location bar.

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• does my machine configuration make sense?

  - by user1227914

  i couldn't think of a better place to ask this question, so here it goes. we're putting together a dedicated server for a website that will initially host the web server and the mysql database. as the website grows, we'll move the database to a different server and this machine will eventually only server the actual website. so the question is ...does my configuration look okay? it's the first time i'm building a server from scratch so i want to make sure i don't combine components that don't fit or something. things like ..do the drives i picked work for the hot swap ..etc. what do you guys think? am i good to go with this configuration? :) Chassis: Supermicro SuperServer 6016T-MTHF (6x DDR3 SDRAM - ECC DIMM 240-pin, 2x LGA1366 Socket, Power Provided: 600 Watt, 4 (free) x hot-swap - 3.5") CPU: Intel BX80614E5620 Xeon E5620 Processor - 4 Core, 2.40GHz, LGA 1366, 5.86GT/s QPI 12MB Cache, 64-Bit, 80W, HyperThreading Memory: Crucial CT51272BB1339 4GB PC10600 DDR3 Memory - 1333MHz, ECC, Registered, 1x4096MB (possibly 3 or 4 of them) Hard Drives: Western Digital WD2002FAEX Caviar Black Hard Drive - 2TB, 3.5", SATA 6Gbps, 7200 RPM, 64MB (possibly 2 or 3). thank you very much for any professional advice :)

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• ssh key questions

  - by Tim

  I have some questions regarding generating keys for ssh access: (1) Supposed there are two computers running ssh server service and I have generated a pair of key files on computer A and copy the public file to computer B. Is it true that this is only a one-way key: We only gave computer A permission to access computer B, not gave computer B permission to access computer A? If I now want to ssh from computer B to computer A, must I generat another pair of key files on computer B and copy the public file to computer A? (2) If I would like to connect a single local computer to several remote servers, is it to generate a common pair of key files only once on the local and copy the same public file to the remote servers, or to generate different pair of key files on the local for different remote servers? (3) If I would like to connect several local computers to a single remote server, when copying the public files from different local computers to the remote server, is it to combine them together into a single authorized_keys file or store them in different authorized_keys files? (4) If there are several servers shared the same file system by, for example, NFS, how to generate keys and arrange the key files for accessing from one server to the other? Also how to still generate keys and arrange the key files for a local computer to access anyone of the servers? All the machines above are Linux.Please provide examples and commands in your reply so that I can better understand how to solve the problems. Thanks and regards!

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• How to rewrite these URLs?

  - by Evik James

  I am brand new to URL rewriting. I am using an Apache rewriting module on IIS 7.5 (I think). Either way, I am able to do rewrites successfully, but am having trouble on a few key things. I want this pretty url to rewrite to the this ugly url: mydomain.com/bike/1234 (pretty) mydomain.com/index.cfm?Section=Bike&BikeID=1234 (ugly) This works great with this rule: RewriteRule ^bike/([0-9]+)$ /index.cfm?Section=Bike&BikeID$1 Issue #1 I want to be able to add a description and have it go to exactly the same place, so that the useful info is completely ignored by my application. mydomain.com/bike/1234/a-really-great-bike (pretty and useful) mydomain.com/index.cfm?Section=Bike&BikeID=1234 Issue #2 I need to be able to add a second or third parameter and value to the url to get extra info for the db, like this: mydomain.com/bike/1234/5678 mydomain.com/index.cfm?Section=Bike&BikeID=1234&FeatureID=5678 This works using this rule: RewriteRule ^bike/([0-9]+)/([0-9]+)$ /index.cfm?Section=Bike&BikeID=$1&FeatureID=$2 Again, I need to add some extra info, like in the first example: mydomain.com/bike/1234/5678/a-really-great-bike (pretty and useful) mydomain.com/index.cfm?Section=Bike&BikeID=1234&FeatureID=5678 So, how can I combine these rules so that I can have one or two or three parameters and any of the "useful words" are completely ignored?

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• How to make a huge ram drive?

  - by Brandon Moore

  At my old job when a report was needed I could sit down with someone and pull up results and get immediate feedback, and then refine my queries and ultimately have the data we needed, in the format we needed within 30-90 minutes. I just started working for a new company with a database containing millions of records and I spent my whole 8 hours making a report that I feel I could have made in less than 2 hours if it were not for the massive amount of data the queries are working with, and the fact that I couldn't ask the person needing the data to sit down with me and give me feedback as I pulled up results as I am used to. So I am trying to think of how we can make the server faster... much faster, so that I can have the same level of productivity I'm used to. One thought that just came to mind is that memory is so cheap these days, and by my calculations I could buy 10 8gig ram sticks for 1000 bucks. What I have never heard of though is a device that would let me combine these into a huge ram drive. So I'd like to know if any such device exists, and if not what is the largest ram drive I could realistically make and how would I go about doing so? EDIT: To you guys who are saying the database shema needs to be analyzed... you can't make a query such as "Select f1, f2, f3, etc from SomeTable" run any faster by normalizing or indexing the table. What I'm talking about IS ABSOLUTELY a need for improved performance at the hardware level. I am used to having results come back to me in a few seconds, not a few minutes or much less a half an hour. Maybe that's what you guys are used to who have 100 billion record tables and you feel like that's fast, but I'm looking for results back from tables with about 10 million records to come back to me withing less than half a minute TOPS.

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• AutoHotkey - Organizing hotkeys so as to use Several hotkeys optimally

  - by Stenemo

  My question is how to structure key combinations in script below most effectively using AutoHotkey. Having searched for exactly how to do this for hours I figured I should post here so others can at least find this solution if they are trying to do the same: http://www.autohotkey.com/board/topic/90013-solved-wasd-fna-left-fnalta-home-fnctrla-ctrl-left-etc/ and How to combine three keys as a hotkey with Autohotkey? My Question is how to use this method most effectively, and is not answered in those threads. My idea would be to use this for everything related to up (etc), e.g.: ; Up Combinations: Ctrl Up, SHIFT + Up, SHIFT + Ctrl Up, [Alt/win + Up easily added and organized using this system] CapsLock & w:: GetKeyState, stateCtrl, LCtrl GetKeyState, stateShift, LShift GetKeyState, stateWin, LWin GetKeyState, stateAlt, LAlt if stateCtrl = D if stateShift = D if stateWin = D Send ^+#{Up}; Ctrl + SHIFT + Win + Up else Send ^+{Up} ; Ctrl + SHIFT + Up else if stateWin = D Send ^#{Up} ; Ctrl + Win + Up else Send ^{Up} ; Ctrl Up else if stateShift = D Send +{Up} ; SHIFT + Up else if stateWin = D Send #{Up} ; Win + Up else if stateAlt = D Send !{Up} ; Alt + Up else Send {Up} ; Up return Also, if there is a better way to do this, that would be great. E.g.: *CapsLock & w:: send {Up} Does almost exactly the opposite of what I want (sends up even if other modifiers are held down). When I hold e.g. control at the same time, I want it to do control + up. Have I missed such a AutoHotkey command? If anyone has a better way to do this that would be great.

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• Is there a way to do something like LVM over NFS?

  - by warren

  I realize that since NFS is not block-level, LVM can't be used directly. However: is there a way to combine multiple NFS exports (from, say, 3 servers) into one mount point on a different server? Specifically, I'd like to be able to do this on RHEL 4 (or 5, and re-export the combined mount to my RHEL 4 server). expansion The reason I pegged lvm is that I want a bunch of exported mounts (servera:/mnt/export, serverb:/mnt/export, serverc:/mnt/export, etc) to all mount at /mnt/space so that my /mnt/space on this server (serverx) as one large filesystem. Yes, I know that re-exporting is generally a Bad Thing™ but thought it might work, if there was a way to accomplish this on a newer release as opposed to an older one From reading the unionfs docs, it appears that I can't use it over a remote connection - have I misread it? More accurately, since Union FS merges the contents of multiple branches, but makes them appear as one, it doesn't seem to go in reverse: I'm trying to mount a bunch of NFS points in a merged fashion, then write to them - not caring where data goes, a la LVM .

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• How would I setup iMail to forward a user's mail to another service w/o leaving a copy locally?

  - by Scott Mayfield

  I have an iMail 2006 server installation in which I have a particular user that has several aliases that all point to a single user (me, for the record). I've been copying all of my mail to GMail and reading it there, but it annoys me that I have to go back weekly and log into my mail account on iMail and delete between 6 and 10 thousand copies of messages I've already received, in order to keep my mailbox from filling up (yes, I have it set with no quota, but I consider it bad form to just let the box grow indefinitely). I've got the copying setup via an inbound user rule, but I'm wondering how to accomplish a "copy and delete" rule. The manual isn't clear on what happens with multiple matching rules (will they be processed in order, or is it a first match situation?) and there isn't a means to combine multiple actions into a single rule. If I use the "forward" action, I THINK that it's going to screw up all the sender information once the mail reaches my GMail account and show it as coming from me instead of the original senders (can anyone confirm that this is accurate?) An easy answer would be to delete my user account entirely, replace it with an alias that maps to my GMail account, but then I would lose my ability to log into the system for admin duties. So that leads me to creating a second, lesser known account for admin use, but since it's a real account, sooner or later I'm going to get mail sent to it and I'll be back to the same situation of having a user account that doesn't get emptied periodically. I imagine I can set the quota to 0 MB to cause all incoming mail to my admin account to bounce, or setup an inbound rule to bounce everything, but this is starting to sound kludgy to me. Does anyone know of a more direct work around to copying a user's incoming mail to an outside server and then deleting the local copy w/o removing their account entirely? Or is this just wishful thinking? Thanks in advance. Scott

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• Does NetworkSolutions have a good DNS service?

  - by joxl

  I'm recovering from a DNS disaster and I need some good advice on an alternate solution. My company owns a domain name through NetworkSolutions. Our website is hosted by another company who also maintains our DNS records. Our email is hosted by Google Apps, and the MX records are maintained through the afore-mentioned website/DNS host. Yesterday our website/DNS host had a serious hiccup in some software and completely overwrote all of our DNS records with invalid values; successfully pointing our domain and MX records at the wrong servers. Unfortunately it wasn't caught until it had time to significantly propagate. On top of that, it wasn't fixed until several hours later, combine that with a long TTL on the records; we have customers who are still bouncing emails. Anyhow, I am now completely terrified of this company's ability to do a good job, so I am considering switching to NetworkSolutions for our DNS service. I need the ability to configure A, CNAME, MX, and TXT records, preferably with a nice user interface (our current provider has a poor UI and doesn't support TXT records). Is NetworkSolutions a recommended DNS host? I am a little biased in their direction because the service will be free since we already pay them for our domain name. However I'm curious what others have experienced with their service.

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• ServerName wildcards in Apache name-based virtual hosts?

  - by Martijn Heemels

  On our LAN I've set up several 'fake' TLDs in the DNS server, with the intention of using them for Apache name-based virtual hosting. I'd like to combine this with mass-virtual-hosting (i.e. VirtualDocumentRoot) on an Ubuntu 10.04 LAMP server. However, I can't get it to select the right vhost! Here is a summary of the Apache config: NameVirtualHost 10.10.0.205 <VirtualHost 10.10.0.205> ServerName *.test VirtualDocumentRoot /var/www/%-3.0.%-2/test/%1/ CustomLog /var/log/apache2/access.log vhost_combined </VirtualHost> <VirtualHost 10.10.0.205> ServerName *.dev VirtualDocumentRoot /var/www/%-3.0.%-2/dev/%1/ CustomLog /var/log/apache2/access.log vhost_combined </VirtualHost> A hostname such as www.domain.com.dev, correctly resolves to 10.10.0.205, but always selects the top vhost, instead of the bottom one, which matches more closely. I was under the impression that Apache would first try to match the ServerName before defaulting to the top vhost for a given IP. What am I doing wrong? Or is this not possible and must I use another IP for each TLD? apachectl -S outputs (trimmed): 10.10.0.205:* is a NameVirtualHost default server *.test port * namevhost *.test port * namevhost *.dev

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• Linux commands shows different results

  - by ClydeFrog

  I'm really having a hard time to process these results on my Ubuntu server. I have a major problem with my JBoss server where I get FileNotFoundExceptions along with "No space left on device" errors. And I thought "maybe I'm out of disk space", and used df command to figure out how much I have left: root@ubuntu1:/# df -h Filsystem Storlek Anvnt Tillg Anv% Monterat på /dev/mapper/ubuntu1-root 36G 13G 21G 38% / none 2,0G 192K 2,0G 1% /dev none 2,0G 0 2,0G 0% /dev/shm none 2,0G 64K 2,0G 1% /var/run none 2,0G 0 2,0G 0% /var/lock /dev/sda1 228M 23M 193M 11% /boot /dev/mapper/vgdata-lvdata 79G 9,2G 66G 13% /data And as you can see, I have plenty of space left. And I also checked if I'm out of i-nodes: root@ubuntu1:/# df -i Filsystem Inoder IAnv IFria IAnv% Monterat på /dev/mapper/ubuntu1-root 2346512 61992 2284520 3% / none 505380 773 504607 1% /dev none 507383 1 507382 1% /dev/shm none 507383 30 507353 1% /var/run none 507383 2 507381 1% /var/lock /dev/sda1 124496 230 124266 1% /boot /dev/mapper/vgdata-lvdata 10486784 233945 10252839 3% /data But then i used du: root@ubuntu1:/# du -s -h /* 7,5M /bin 23M /boot 19G /data 192K /dev 11G /eniro 5,3M /etc 112K /home 0 /initrd.img 183M /lib 0 /lib64 16K /lost+found 12K /media 4,0K /mnt 4,0K /opt du: kan inte komma åt "/proc/20452/task/20452/fd/3": Filen eller katalogen finns inte du: kan inte komma åt "/proc/20452/task/20452/fdinfo/3": Filen eller katalogen finns inte du: kan inte komma åt "/proc/20452/fd/3": Filen eller katalogen finns inte du: kan inte komma åt "/proc/20452/fdinfo/3": Filen eller katalogen finns inte 0 /proc 18M /root 8,2M /sbin 4,0K /selinux 8,0K /srv 0 /sys 40K /tmp 691M /usr 1,2G /var 0 /vmlinuz Notice that /data and /eniro are 30G combined! How is it possible? Do I have a memory leak somewhere? Or is it something else? ----- EDIT 1 ----- Ok, I figured out that /data has its own mount so it's not possible to combine /data and /eniro because they aren't on the same mount. But how come it says 9,2G on the first command when it says 19G on the third on directory /data?

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• How would I setup iMail to forward a user's mail to another service w/o leaving a copy locally?

  - by Scott Mayfield

  I have an iMail 2006 server installation in which I have a particular user that has several aliases that all point to a single user (me, for the record). I've been copying all of my mail to GMail and reading it there, but it annoys me that I have to go back weekly and log into my mail account on iMail and delete between 6 and 10 thousand copies of messages I've already received, in order to keep my mailbox from filling up (yes, I have it set with no quota, but I consider it bad form to just let the box grow indefinitely). I've got the copying setup via an inbound user rule, but I'm wondering how to accomplish a "copy and delete" rule. The manual isn't clear on what happens with multiple matching rules (will they be processed in order, or is it a first match situation?) and there isn't a means to combine multiple actions into a single rule. If I use the "forward" action, I THINK that it's going to screw up all the sender information once the mail reaches my GMail account and show it as coming from me instead of the original senders (can anyone confirm that this is accurate?) An easy answer would be to delete my user account entirely, replace it with an alias that maps to my GMail account, but then I would lose my ability to log into the system for admin duties. So that leads me to creating a second, lesser known account for admin use, but since it's a real account, sooner or later I'm going to get mail sent to it and I'll be back to the same situation of having a user account that doesn't get emptied periodically. I imagine I can set the quota to 0 MB to cause all incoming mail to my admin account to bounce, or setup an inbound rule to bounce everything, but this is starting to sound kludgy to me. Does anyone know of a more direct work around to copying a user's incoming mail to an outside server and then deleting the local copy w/o removing their account entirely? Or is this just wishful thinking?

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• finding the best network latency between two countries

  - by Yoav Aner

  I know there are many tools to test for bandwidth and latency, but they all rely on having at least one host from which you can run those tests. I wonder whether there's an online source or some other way to guestimate the latency or speed between two countries (in general). For example, would a customer in Japan get lower latency if the server is located in Singapore or Australia? Is a user in India likely to get higher download speed from a server in the UK or in the US? Are there any online resources or some clever ways to answer those questions with a reasonable degree of accuracy? [UPDATE]: Thanks for the great suggestions from Raffael Luthiger. I didn't know about those looking glass servers. The submarine cable maps were also really cool to discover (Thanks to Jesper Mortensen). Also seems really wise if I could ask those network professional in the area for their experience, but obviously I don't have access to those. At least some of them are on SF :) However, I'm still a little unsure how to combine those resources to give me some measurements. This is the information I have: Two countries (A,B). I do have IP addresses of customers in country A (I can obtain those from the web server log files for example). Presumably I can find some looking glass servers in country B and run a trace to those IPs. What's the best measurements to use? Are there any scripts that help automate at least some of this process?

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• Correct MySQL username/password, but getting Access Denied error when run from script

  - by Nick

  I'm currently trying to run the following command from within a shell script. /usr/bin/mysql -u username -ppassword -h localhost database It works perfectly fine when executed manually, and not from within a script. When I try to execute a script that contains that command, I get the following error: ERROR 1045 (28000) at line 3: Access denied for user 'username'@'localhost' (using password: YES) I literally copied and pasted the working command into the script. Why the error? As a sidenote: the ultimate intent is to run the script with cron. EDIT: Here is a stripped down version of my script that I'm trying to run. You can ignore most of it up until the point where it connects to MySQL around line 19. #!/bin/sh #Run download script to download product data cd /home/dir/Scripts/Linux /bin/sh script1.sh #Run import script to import product data to MySQL cd /home/dir/Mysql /bin/sh script2.sh #Download inventory stats spreadsheet and rename it cd /home/dir /usr/bin/wget http://www.url.com/file1.txt mv file1.txt sheet1.csv #Remove existing export spreadsheet rm /tmp/sheet2.csv #Run MySQL queries in "here document" format /usr/bin/mysql -u username -ppassword -h localhost database << EOF --Drop old inventory stats table truncate table table_name1; --Load new inventory stats into table Load data local infile '/home/dir/sheet1.csv' into table table_name1 fields terminated by ',' optionally enclosed by '"' lines terminated by '\r\n'; --MySQL queries to combine product data and inventory stats here --Export combined data in spreadsheet format group by p.value into outfile '/tmp/sheet2.csv' fields terminated by ',' optionally enclosed by '"' lines terminated by '\r\n'; EOF EDIT 2: After some more testing, the issue is with the << EOF that is at the end of the command. This is there for the "here document". When removed, the command works fine. The problem is that I need << EOF there so that the MySQL queries will run.

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• I'm looking for a program that can automate opening/closing a program

  - by Peterstone

  I am looking a for a program to remember things with these features: Open files or programs in my own computer at a planned time. For example I want every morming at 8:00 the program open a particular mp3 file. But suposse, by mistake, that I on my computer and 9:00, then I want that the program rememberme what I planned to open at 8:00. Show me the program as an active windows on my desktop. The windows of the program opened is what the user is seeing (Is at the first place in the desktop) and the rest of the program windows are below. Close programs or files in my own computer at a planned time. For example I want that the program mp3 file that was opened at 8:00 was closed at 10:00 if at that time still be opened. Detection of events. For instance If I open particular videogame program. then a mp3 file (with a recording message arguing why I shouldn´t continue playing that videogame at work time) is opened. Possibility of combine the features mentioned before each other.

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