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• Recursive Batch File

  - by MCZ

  I have a file that looks this: head1,head2,head3,head4,head5,head6 a11,a12,keyA,a14,a15,a16 a21,a22,keyB,a24,a25 a31,a32,keyC,a34 a41,a42,keyB,a44,a44 a51,a52,keyA,a54,a55,a56 a61,a62,keyA,a64,a65,a66 a71,a72,keyC,a74 some message Objective: Write list of unique keys to a text file. For example, the result for the file described above should be: keyA, keyB, keyC Here's the pseudocode I would like to implement in batch file recur.bat Read second line of inputfile If no key exist on second line, return else continue Append keyX to list FINDSTR /v keyX inputfile Pipe results to recur.bat I don't know if this is the most efficient way to do this without using actual programming language. Any suggestions for actual batch file code?

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• For Loop counting from 1 to n in a windows bat script

  - by raoulsson

  I need to run a windows command n times within a bat script file. I know how to do this in various programming languages but cannot manage to get it right on the windows command line :-( I would expect something like either for(int i = 0; i < 100; i++) { // do something } or even this (though not entirely seriously) 1.upto(100, { // do something }) Thanks! EDIT I can write a program in java, perl, c or whatever that will generate a bat script that looks like this for %%N in (1 2 3 4 5 6 7 8 9 10 11 12) do echo %%N and so on. Or even "better": echo 1 echo 2 echo 3 echo 4 echo 5 echo 6 echo 7 echo 8 echo 9 echo 10 echo 11 echo 12 and then execute it... But the thing is that I need a concise way to specify a range of numbers to iterate through within the script. Thanks!

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• Have Ubuntu 9.10 desktop, just got Macbook Pro. Share over Samba, NFS, other?

  - by miamisoftware

  Hi everyone. As the title says, I have and love my Ubuntu 9.10 desktop (use it for programming). Just got a Macbook Pro (Snow Leopard) and stuff like Documents, etc, trying to figure out easiest way to share my Ubuntu desktop with my Macbook Pro. Should I use Samba or NFS and is it easy to configure one (or something else) for only in network access (192.168.1.x). It took me about 2 days to find/setup Macfuse and Macfusion for sshfs to the Fedora web server and I'm hoping there's something much easier for this in network access. But if it requires or is suggested I go ssh, I can do that. Are there any security problems with either Samba or NFS - don't know much about AFP-Apple protocol so I've not brought it up. Thanks in advance.

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• How can I get a virus by just visiting a website?

  - by Janet Jacobs

  It is common knowledge that you can get a virus just by visiting a website. But how is this possible? Do these viruses attack Windows, Mac and Linux users, or are Mac/Linux users immune? I understand that I obviously can get a virus by downloading and executing a .exe in Windows but how can I get a virus just by accessing a website? Are the viruses programmed in JavaScript? (It would make sense since it is a programming language that runs locally.) If so, what JavaScript functions are the ones commonly used?

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• How to integrate Thunderbird with SpamAssassin running on the server?

  - by haimg

  I'm trying to integrate SpamAssassin running on a server with Thunderbird. Basically I need to be able to select several emails in Thunderbird and send them back to SpamAssassin for training, either as spam or ham. I tried several approaches: Tried "Report Spam" plugin, which is able to send message back to server either as an email attachment or via HTTP post. However, the plugin is rather buggy... Does not support sending several messages at once, "report as ham" is not working at all, etc. Wanted to make a custom button that will copy selected messages to a separate IMAP folder (I could create "LearnAsSpam" and "LearnAsHam" folders in IMAP that will get processed automatically on server), but don't even know how to approach this in Thunderbird, don't want to learn Thunderbird extention authoring... Server-side, I'm prepared to do some custom programming or integration needed (can receive a message via HTTP / SMTP / whatever), my stumbling block is Thunderbird... So, how can I send emails from Thunderbird back to SpamAssassin running on email server for Bayesian training, with as few keystrokes as possible?

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• Can not run ifconfig like commands via browser

  - by savruk

  Problem is I cannot run "ifconfig" or similar commands via browser. Environment: Programming language : python Server : lighttpd(CGI) , running on busybox. Well machine is really small and so I am really restricted. Tried techniques: chown every script to root. But there is no differences. Why? Because lighttpd runs under another user, I mean not under root. As it is not root, when I try to run script from browser it always calls the python file with its uid. So it makes it impossible to run "ifconfig eth0 192.168.2.123" like commands via web browser. I get "ifconfig: SIOCSIFADDR: Permission denied" error. What can I do? I do not have any sudoers file, so cannot modify sudo command. Well, I don't even have "sudo" command :) Thanks for your help

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• Purpose of JBoss tables

  - by Rich

  Hi Can anyone point me in the direction of some documentation (or provide the information here) about the following tables, created by JBoss 5.1.0 when it starts up? I know what they are for at a high level, and know why they are there, but I could do with some lower-level documentation about each table's purpose. The tables are: hilosequences timers jbm_counter jbm_dual jbm_id_cache jbm_msg jbm_msg_ref jbm_postoffice jbm_role jbm_tx jbm_user I know that the first two are associated with uuid-key-generator and the EJB Timer Service respectively, while the rest are associated with JBoss Messaging. What I want to know is something along the lines of "jmg_msg stores each message when it is created...", that kind of thing. I wasn't sure where to ask this question, ServerFault or StackOverflow, but I decided it wasn't programming related so thought I should put it here - I hope that's ok! Thanks Rich

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• How do I create a free server-side database to be accessed via Windows forms and/or browser?

  - by NoCatharsis

  I have no formal education in databasing or programming, but I've learned enough SQL, C++, and C# to at least get started setting up a small database on my company's server. Using MS SQL Server 2008 R2, I have created the database and set up columns with proper data types. However, there seems to be a lot of tweaks and details that are way over my head. Since I would like these data to be accessible to the other 7 or 8 people in my office (preferably via web browser), I'm wondering whether this is the best setup for my situation. The other option I've read about is a LAMPP server, which I assume is the competing free option to Microsoft's Express packages. I know nothing of LAMP servers except from the articles I've read on how to set them up (and I believe I even saw a detailed tutorial somewhere). To summarize, my question is this: Which of these (or any other) server setups would best suit my purposes, keeping in mind that I'm a true novice (but willing to learn), and would like to keep it free until I get more experience?

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• Why does VNC eat certain characters?

  - by TK Kocheran

  I often use VNC to connect to my desktop upstairs using a laptop downstairs over my home network. I tunnel the VNC connection via SSH. The problem I keep running into is that I'll attempt to type a ! or a : or even a captial A and it will come across the wire as a 1, ;, or a respectively. Is this something I can fix? It's really REALLY annoying while one is programming to have to pop open character map and find a colon and copy/paste it in each time. Running Ubuntu 10.04 upstairs, Linux Mint 10 downstairs.

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• Why do some PDFs lag in Adobe Acrobat?

  - by Coldblackice

  I have a handful of PDFs open. One of them in particular is extremely laggy, almost to the point of being unreadable. When I scroll through its pages, it's almost like an extreme version of v-sync being turned off. Very choppy. Overall system resources are plentiful, and all of the other PDFs cruise up and down with no stuttering or problems. I've tried closing and reopening the problem PDF to no avail. It's a small PDF, only 3MB in size, with no graphics (only programming code snippets). Surely, it must be some type of problem with the specific PDF (I'll try opening it in another PDF-viewing program, rather than Acrobat X). Possible corruption? Could there be some type of GPU/hardware-acceleration intervening going on? I've never heard of such with PDF-viewing.

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• Have you considered switch from Windows to OS X?

  - by Oscar Reyes

  For several years I wanted to move from Windows to OSX. Mainly because back then Windows95/98/2000 were terrible options. Now I have finally put my hands on this. Just when Vista and Win7 seems to redeem all the mistakes from their predecessors. The most terrible rant is the lack of the following keys: PageUp, PageDown, Home, End, Supr Not having those made my first programming day terrible on OSX. I don't regret switching, but somehow I expected something else. So: Have you considered switch to mac? What has stopped you? What is holding you back? If you have switched already, are you willing to comeback? (Now I run XP/Vista/Ubuntu/OSX in the same machine, yeah!!)

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• I would like to know if someone has applescript to loop al my stickynotes and put it in a textfile

  - by Richard

  I have been meaning to do this for a while, but I never got around to do it. The problem is that I have to do research how applescript works. Anyway, I have now collected over 200 snippets for my programming, but I need to sort them out Putting them all in a textfile with some obvious breaks inbetween I could sort them and tag them for another snippet programm. This is my first question here, so I hope I am at the right place, maybe stack overflow is also a good place to ask Thanks in advannce, if someone already has done this or knows how to do this Richard

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• How can I get started with BigData?

  - by ????? ????????

  I have a programming background, and I've done lots of database design and written lots of queries with Sql Server. I am really excited about looking at bigdata solutions. I know almost nothing about it. The way I want to learn is to sign up for a sandbox where I can try things out. questions Is there a sandbox where I can play around with hadoop? It does not have to be free. Would amazon EMR be the right path to go? What technologies should I be looking at to get started quickly? Is there a 'bigdata' dataset that is available to play with? Thank you so much for your guidance.

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• Can I write an Excel macro to find product info based on a SKU?

  - by GorillaSandwich

  My coworker wants to create an invoice template in Excel 2007. In column 1, he wants to be able to put in a SKU like '000293954'[1], and when he hits tab, have the other columns fill in a matching description and price. There would be a bunch of different SKUs and information. Has anybody done this type of thing with a macro before? Any advice? (I have programming experience with Javascript, PHP, and Ruby, but have never written a macro.) [1] The input wouldn't be typed - he'd use a wedge barcode scanner that inputs just like it was typed. Not that it matters for this question.

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• Can I run Linux on the HP Mini from Verizon Wireless, with a built-in 3G modem, and connect using the built in modem?

  - by Parker

  I apologize if my question made little sense, I am very tired at the moment. Anyway, Recently I purchases the HP Mini from Verizon Wireless. It runs on the Intel Atom processor and came with Windows 7 Starter Edition, which is quite possibly the worst and most restrictive OS I have ever used. I plan on installing CRUX, after doing a little research on minimal, free, Linux operating systems, as I am working on web programming using Python, among other things. My only worry is that, because my HP Mini uses a built in wireless card (and I have no wifi connection, only a 3G connection) that has a "mobile access" connection to Verizon wireless, I am not sure if after installing CRUX that I would still be able to connect using this option. I have never used Linux before, and am hoping this will work. So if anybody has experience with this...please answer, can I connect to vzw 3G with linux, using an internal mobile access card...

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• Why do we still have to use drive letters to identify file systems?

  - by Charles E. Grant

  A friend has run into a problem where they installed Windows 7 from an external drive, and the internal boot drive is now assigned to H:. Theoretically this shouldn't cause problems because there are programming interfaces for getting the drive letter for the system drive. In practice though, there are quite a few programs that assume that C: is the only possible location for the system directories, and they refuse to run with the system directories on H:. That's not Microsoft's fault, but it's a pain none-the-less. The general consensus seems to be that a re-install, setting the internal boot drive to C:, is the only way to avoid fix these problems. UNIX-like systems display all file systems in a single unified directory tree and mostly seem to avoid problems like this. Is it possible to configure a Windows system without reference to drive letters, or does the importance of backwards compatibility mean that Windows will be working with drive letters from now until doomsday?

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• How to write to a file and, while the file is still being writen, read and parse its contents using

  - by Isabelle

  Hello. I'm actually trying to write a shell script that logs the output of a command to a file but, since the command takes a long time to complete (about 15 minutes), I would like to start parsing the output of the command (content of the file) before the command is completed, so I can send messages to the standard output (the user), like: 10% complete 45% complete and so on. Program steps Redirect command to a file: $(command) $FILE Start reading and parsing the output ($FILE) before the command is finished. I thought of using pararell programming, but I havent't got the hang of it. Any help you be appreciated. Best regards.

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• [Linux] Bind/map Character to alt+[some key]?

  - by Paul

  OS: Ubuntu In programming and various terminal programs (Screen, Vim) the [, ], { and } tends to be used a lot. I'm using a Norwegian keyboard where these are placed such that I have to stretch my fingers a bit too long for whats comfortable. To make it easier I though I'd try to make alt+[some key] be one of these characters. Is there a way that I can bind, say alt+æ (Norwegian letter) to '{' system wide? Btw, is such thing called binding, mapping or something else? I'm getting a bit confused by the terms... :)

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• How do I prevent TCP connection freezes over an OpenVPN network?

  - by Jason R

  New details added at the end of this question; it's possible that I'm zeroing in on the cause. I have a UDP OpenVPN-based VPN set up in tap mode (I need tap because I need the VPN to pass multicast packets, which doesn't seem to be possible with tun networks) with a handful of clients across the Internet. I've been experiencing frequent TCP connection freezes over the VPN. That is, I will establish a TCP connection (e.g. an SSH connection, but other protocols have similar issues), and at some point during the session, it seems that traffic will cease being transmitted over that TCP session. This seems to be related to points at which large data transfers occur, such as if I execute an ls command in an SSH session, or if I cat a long log file. Some Google searches turn up a number of answers like this previous one on Server Fault, indicating that the likely culprit is an MTU issue: that during periods of high traffic, the VPN is trying to send packets that get dropped somewhere in the pipes between the VPN endpoints. The above-linked answer suggests using the following OpenVPN configuration settings to mitigate the problem: fragment 1400 mssfix This should limit the MTU used on the VPN to 1400 bytes and fix the TCP maximum segment size to prevent the generation of any packets larger than that. This seems to mitigate the problem a bit, but I still frequently see the freezes. I've tried a number of sizes as arguments to the fragment directive: 1200, 1000, 576, all with similar results. I can't think of any strange network topology between the two ends that could trigger such a problem: the VPN server is running on a pfSense machine connected directly to the Internet, and my client is also connected directly to the Internet at another location. One other strange piece of the puzzle: if I run the tracepath utility, then that seems to band-aid the problem. A sample run looks like: [~]$ tracepath -n 192.168.100.91 1: 192.168.100.90 0.039ms pmtu 1500 1: 192.168.100.91 40.823ms reached 1: 192.168.100.91 19.846ms reached Resume: pmtu 1500 hops 1 back 64 The above run is between two clients on the VPN: I initiated the trace from 192.168.100.90 to the destination of 192.168.100.91. Both clients were configured with fragment 1200; mssfix; in an attempt to limit the MTU used on the link. The above results would seem to suggest that tracepath was able to detect a path MTU of 1500 bytes between the two clients. I would assume that it would be somewhat smaller due to the fragmentation settings specified in the OpenVPN configuration. I found that result somewhat strange. Even stranger, however: if I have a TCP connection in the stalled state (e.g. an SSH session with a directory listing that froze in the middle), then executing the tracepath command shown above causes the connection to start up again! I can't figure out any reasonable explanation for why this would be the case, but I feel like this might be pointing toward a solution to ultimately eradicate the problem. Does anyone have any recommendations for other things to try? Edit: I've come back and looked at this a bit further, and have found only more confounding information: I set the OpenVPN connection to fragment at 1400 bytes, as shown above. Then, I connected to the VPN from across the Internet and used Wireshark to look at the UDP packets that were sent to the VPN server while the stall occurred. None were greater than the specified 1400 byte count, so the fragmentation seems to be functioning properly. To verify that even a 1400-byte MTU would be sufficient, I pinged the VPN server using the following (Linux) command: ping <host> -s 1450 -M do This (I believe) sends a 1450-byte packet with fragmentation disabled (I at least verified that it didn't work if I set it to an obviously-too-large value like 1600 bytes). These seem to work just fine; I get replies back from the host with no issue. So, maybe this isn't an MTU issue at all. I'm just confused as to what else it might be! Edit 2: The rabbit hole just keeps getting deeper: I've now isolated the problem a bit more. It seems to be related to the exact OS that the VPN client uses. I have successfully duplicated the problem on at least three Ubuntu machines (versions 12.04 through 13.04). I can reliably duplicate an SSH connection freeze within a minute or so by just cat-ing a large log file. However, if I do the same test using a CentOS 6 machine as a client, then I don't see the problem! I've tested using the exact same OpenVPN client version as I was using on the Ubuntu machines. I can cat log files for hours without seeing the connection freeze. This seems to provide some insight as to the ultimate cause, but I'm just not sure what that insight is. I have examined the traffic over the VPN using Wireshark. I'm not a TCP expert, so I'm not sure what to make of the gory details, but the gist is that at some point, a UDP packet gets dropped due to the limited bandwidth of the Internet link, causing TCP retransmissions inside the VPN tunnel. On the CentOS client, these retransmissions occur properly and things move on happily. At some point with the Ubuntu clients, though, the remote end starts retransmitting the same TCP segment over and over (with the transmit delay increasing between each retransmission). The client sends what looks like a valid TCP ACK to each retransmission, but the remote end still continues to transmit the same TCP segment periodically. This extends ad infinitum and the connection stalls. My question here would be: Does anyone have any recommendations for how to troubleshoot and/or determine the root cause of the TCP issue? It's as if the remote end isn't accepting the ACK messages sent by the VPN client. One common difference between the CentOS node and the various Ubuntu releases is that Ubuntu has a much more recent Linux kernel version (from 3.2 in Ubuntu 12.04 to 3.8 in 13.04). A pointer to some new kernel bug maybe? I'm assuming that if that were so, then I wouldn't be the only one experiencing the problem; I don't think this seems like a particularly exotic setup.

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• Is there any way to use devices like mp3 players when they are charging?

  - by GeoB

  The question is simple I think. All we have encounter gagets that they don't fuction while they are in charge, like cameras or mp3 players. But, we know that cell phones or laptops can have full function, when they charge with a charger, like USB connector. Is it in the programming? Why this happens? Can we change that with some device e.g. controlling the charging? I want to use a portable USB charger for my mp3, but I can't wait 3 hours for it to charge, because I cannot listen to music. It notices the charger, and gets in charge mode. Nothing functions until I unplug it. Thanks a lot

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• Mini-jack problem with Sony Vaio (running XP)

  - by qftme

  I have a five year old Sony Vaio laptop (vgn-fw31m) that has had impact damage to the audio-output mini-jack for about the last year or so. In a recent discussion with my brother, we wondered whether it would be possible to write a program that would enable windows to use the microphone mini-jack input as the audio-output? As I currently use this laptop for work I am not keen to risk pulling it apart in order to replace the components comprising the audio-out. I therefore 'hope' that a programming solution exists. I would really appreciate any advice on this and eagerly await your response. Kind regards, qftme :)

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• Context Menu for Browser to download file to specific folder

  - by elcojon

  There is this website which has customized audio files for me. I would like to save them in a special folder. Now I don't want to select the "special folder" each time in the file-chooser dialogue of my browser. I would rather prefer to have a custom entry in the context menu when I right-click the download link. This context-menu-entry should do the trick and download the file to the predefined "special folder". How would I start about that? I am using Safari and Chrome. So a solution in either browser is fine. To get into the context menu of the browser, what kind of programming do I need to do? Is it an extension, plugin, etc.? Thanks

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• Environment variable for volume names in Windows?

  - by Shinrai

  I'm trying to write a batch file that will look at the volume label of the current drive and report if it's not equivalent to a certain string. Is there a default variable in the shell for this? Can I define one? Am I SOL and I'll actually have to do some (shudder) programming? EDIT: If this is possible in PowerShell that would work fine. (For the curious, we ship our machines with software cloning as a rapid bootable backup solution since most of our customers are daytraders and aren't interested in RAID due to urgency of getting-the-hell-back-to-work-right-away if there's a software corruption problem, and we want to make it immediately obvious if they're booting to the backup drive unintentionally, like say the primary failed entirely. The hope was just to write a simple batch file that would autostart on boot and throw a warning in the event of a problem.)

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• All terminal commands (like ls, cd, edit, open) are returning errors on my Mac

  - by park

  From what I can tell from reading other questions/answers is that my .bash_profile file may be corrupt. If I type echo $PATH in terminal the result is: /usr/local/git/bin From what I've read, that's not what the result is supposed to be. But I also can't get any of the commands (like edit or subl, for Sublime Text 2) to open the .bash_profile file to edit it. I was able to open the file in TextEdit using "cmd-shift-.", and here's what's in the file: [[ -s "$HOME/.rvm/scripts/rvm" ]] && source "$HOME/.rvm/scripts/rvm" PATH=$PATH:~/bin export PATH export PATH=/usr/local/git/bin But the file is LOCKED, so I can't edit it there either. I'm very new to programming and in the middle of trying to install everything on my Mac to go through a Ruby on Rails tutorial. I can't even check my version of ruby, since even ruby -v returns -bash: ruby: command not found Any help would be greatly appreciated. Thanks.

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• Graphic Setup tune-up checklist

  - by Click Ok

  I was trying to play the game Warzone 2100 and the games runs fine, with nice speed, but the screen stays with a horizontal lines "flickering"... My PC have a integrated GeForce Go 6100 vga. Ok, not a powerfull vga, but it's not the end of the world to run a "simple" game like this (compared with another games that ask you send your eyes to purchase a expensive vga). So, I think that the problem can be of the configuration of my machine. I use it in first instance for programming jobs, so I underpay attention to video setup. I would like about a checklist to know if my PC is "ready" to games. By example, I know that I need: Lastest vga drivers Updated DirectX and OpenGL What you suggest? There is too some good programs to test performance and suggests improvements in the system? Thank you! PS: I'm using Windows 7

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