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  • Virtualbox Ubuntu 10.04 on Windows 7: networking won't work

    - by Herbert Roitblat
    I have a virtualbox image that I created using libvirt from Ubuntu 10.04. It assigns a fixed IP address. I can start it up on my Windows 7 VirtualBox, but I cannot get networking to work. My colleague loaded the same image onto his Windows 7 and networking worked as a bridged connection. Therefore, I know that the image is good, it must be something about my Windows 7 installation. Any thoughts on where to look to get networking running in my virtual machine? Thanks, Herb

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  • Do Not Track feature of IE10

    - by Pete Herbert Penito
    One of our clients is getting a bit worried about the new "Do Not Track" feature of Internet Explorer 10. Her site is heavily dependent on php sessions (as I imagine many other sites are). This was what she was reading: http://www.bbc.co.uk/news/technology-18288710 I need some clarification, will this affect how sessions (or cookies) work on normal web sites that use the PHP $_SESSION array? Or is it regarding only how advertising works (engadget's article seems to insinuate this)? Can anyone provide a more technical overview (and the ramifications) of PHP-powered websites?

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  • Free space in tmpfs partition not adding up

    - by Dean Herbert
    I have had my /tmp/ partition filling up recently when it should not be anywhere near full. On further investigation, I found that the partition was listing free space a lot lower than it should be. I am guessing a remount will fix this, but am very curious as to why this has happened and where this space has gone. du output: root@odoroki:/tmp# du --summarize -h 3.3M . df output: root@odoroki:/tmp# df -h /tmp Filesystem Size Used Avail Use% Mounted on tmpfs 3.9G 3.3G 653M 84% /tmp Update: after deleting some files it has happened again. du output: root@odoroki:/tmp# du -h --summarize 11M . df output: root@odoroki:/tmp# df -h /tmp Filesystem Size Used Avail Use% Mounted on tmpfs 3.9G 3.9G 0 100% /tmp I have a feeling this has started since a recent apt-get upgrade, but it still seems like strange behaviour. I did do a quick scan over lsof output and couldn't see any open/stuck file handles. Unfortunately due to the seriousness of the issue I had to reboot the server, after which usage seems to match correctly.

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  • Only run CRON job if connected to specific wifi network

    - by Herbert
    I am a newbie to scripting on Linux (Lubuntu), but I would like to make a script that runs a cron job only if my laptop is connected to my home wifi. Is this possible? I guess, I could do something with iwconfig and pull the ESSID from there with grep? So far, I tried this and it seems to work: #!/bin/bash # CRON, connected to specific WIFI clear netid=HOFF216 if iwconfig | grep $netid then clear echo "True, we are connected to $netid" rsync ........... else clear echo "False, we are not connected to $netid" fi

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  • PHP DL Function

    - by Pete Herbert Penito
    Is allowing dynamic extension loading dangerous for some reason? I ask because I need it to include the pecl oauth.so extension to make the Google Adwords PHP SDK work using dl(). I've tried all other alternatives but just can't get it to work: http://php.net/manual/en/function.dl.php enable_dl is set to off by default inside my php.ini, I enabled it, restarted apache and it works. If it's safe to use why is it disabled by default? I'm the only user with access to the server and it will be hosting a web application. Any advice would be helpful!

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  • How do I remove Slony from a restored PostgreSQL database?

    - by Scott Herbert
    I've restored a database which came from a server on which Slony was running. The server on which the database has been restored does not have Slony installed. When the database restored, there were a lot of errors reported, with Slony related objects not getting created due to Slony related logins being missing. This I thought was not a problem, as losing the Slony objects didn't seem to matter, and infact seemed desirable. However, now I've got an anoying, if not critical problem. Whenever one clicks on a table in the newly restored DB in PGAdmin, a Slony related error popup ... pops up. The first one reads: "An error has occured: ERROR: function _rmscl.getlocalnodeid(unknown) does not exist" I notice that under the Replication node in PGAdmin, that there is a Slony replication cluster. Trying to drop this cluster results in more object missing type errors. Does anyone have any ideas how we can remove the last vestiges of Slony from this database?

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  • PostgreSQL 9: Does Vacuuming a table on the primary replicate on the mirror?

    - by Scott Herbert
    Running PostgreSQL 9.0.1, with streaming replication keeping one read-only mirror instance up to date. Auto-vaccuum is on on the primary, except for a few tables which are not vacuumed by the auto-vacuum daemon, in an effort to reduce business-hour IO. These tables are "materialised views". Each night at midnight, we run a vacuum across the database in order to clean up those tables that are excluded from the auto-vacuum. I'm wondering if that process replicates across to the mirror, or if I need to set up vacuum on the mirror as well?

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  • Is it possible to change "working directory" of XeTeX?

    - by Herbert Sitz
    Using XeTeX there are many working files that get created in process of producing the pdf, and they litter the directory where my main .tex file is. Is it possible to change the working directory of XeTeX so that it stores all these scratch files in some other directory, out of the way? There is a previous question on Superuser.com that discusses a utility that cleans up the working files by deleting them after they're produced: http://superuser.com/questions/95712/how-to-avoid-littering-ones-tex-directories-with-intermediate-files That solution doesn't work for me since I'm using XeTeX, but also it seems like it would be preferable to simply be able to designate a "scratch" directory where all working files are saved. I haven't been able to find any info on how to do it though. Is there a way? (My question is prompted partly because of the fact that I often work with files in a directory that is shared using DropBox, so it creates a lot of unnecessary traffic if files are getting created and destroyed willy nilly. I don't know if it affects speed in any way, but the idea of having a separate working directory that is not shared/replicated by DropBox would be a cleaner solution, even if I could use the method suggested in the earlier thread.)

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  • How do I make my Boot Camp partition bootable again?

    - by Dan Herbert
    I needed to resize my Boot Camp partition so I used Gparted to move and resize it. This seemed to work, except that now I can't boot into Windows. I can boot into OS X just fine. OS X can recognize the Boot Camp partition and view its contents. When I try to reboot into Windows, however I get the message: No bootable device -- insert boot disk and press any key The only solutions I've been able to find online suggest that the only way to fix this is to either clone the drive or remove the Windows partition and re-install it. Is there any way to fix my Windows partition so that I don't have to reinstall Windows again?

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  • Automatically restarting Perfmon Data Collector Sets

    - by Scott Herbert
    I have a number of User Defined Data Collector Sets running on a Windows 2008R2 server, collecting perfmon stats from various servers. Whenever there is a network interruption, or a server rebooted (at worst, when the server which is running all these DCSs is rebooted), I have to manually restart some or all of the Data Collector Sets. Is there a way to configure them to automatically restart, or otherwise be more resilient?

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  • Cronjob not Running

    - by Pete Herbert Penito
    I have a bash script that looks like this: #!/bin/sh PID=`ps faux | grep libt | awk 'NR==2{print $2}'` STATUS=`ps faux | grep libt | awk 'NR==2{print $1}'` if [ "$STATUS" = "ec2-user" ]; then echo "libt already killed" else sudo kill $PID echo "libt was killed" fi sleep 5 cd /home/ec2-user/libt sudo ./libt I have saved this file as restart.sh and when I run it like ./restart.sh, it does what its supposed to (kills the libt process and restarts it). However, now I am trying to automate the process by using cron. So I made a cron job that I want to run every 6 hours that looks like this 0 */6 * * * /home/ec2-user/restart.sh When I run "crontab -l" I can see this print so I know it's been added properly. I should mention that the service does not have the ability to be restarted, (like "service ... restart") the process ID needs to be found, killed and then the start script needs to be ran. I have found that this cronjob is not working, I'll log onto the box and I can tell by looking at the logs that no restart has occurred. What am I doing wrong? What can I do to troubleshoot? Any advice would help, this is my first cron job :) Thanks!

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  • Windows 7 VPN wont allow FTP, route FTP traffic through local network

    - by Rolf Herbert
    I use a VPN on my windows 7 PC for privacy and currently route all my traffic through the VPN. This arrangement is fine and its plenty fast. Unfortunately the VPN does not allow any FTP traffic so when I am updating websites I have to disconnect the VPN and work through my local connection. This is annoying and cumbersome. I have read a little about split tunnelling but this is not quite what I need, and it often talks about 'internet' traffic which is not specific to certain IPs or ports. Is it possible to route traffic on certain ports through the local connection, or is it possible to route traffic on certain IPs through the local connection using stuff built into windows 7..? Thanks

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  • Interesting things – Twitter annotations and your phone as a web server

    - by jamiet
    I overheard/read a couple of things today that really made me, data junkie that I am, take a step back and think, “Hmmm, yeah, that could be really interesting” and I wanted to make a note of them here so that (a) I could bring them to the attention of anyone that happens to read this and (b) I can maybe come back here in a few years and see if either of these have come to fruition. Your phone as a web server While listening to Jon Udell’s (twitter) “Interviews with Innovators Podcast” today in which he interviewed Herbert Van de Sompel (twitter) about his Momento project. During the interview Jon and Herbert made the following remarks: Jon: [some people] really had this vision of a web of servers, the notion that every node on the internet, every connected entity, is potentially a server and a client…we can see where we’re getting to a point where these endpoint devices we have in our pockets are going to be massively capable and it may be in the not too distant future that significant chunks of the web archive will be cached all over the place including on your own machine… Herbert: wasn’t it Opera who at one point turned your browser into a server? That really got my brain ticking. We all carry a mobile phone with us and therefore we all potentially carry a mobile web server with us as well and to my mind the only thing really stopping that from happening is the capabilities of the phone hardware, the capabilities of the network infrastructure and the will to just bloody do it. Certainly all the standards required for addressing a web server on a phone already exist (to this uninitiated observer DNS and IPv6 seem to solve that problem) so why not? I tweeted about the idea and Rory Street answered back with “why would you want a phone to be a web server?”: Its a fair question and one that I would like to try and answer. Mobile phones are increasingly becoming our window onto the world as we use them to upload messages to Twitter, record our location on FourSquare or interact with our friends on Facebook but in each of these cases some other service is acting as our intermediary; to see what I’m thinking you have to go via Twitter, to see where I am you have to go to FourSquare (I’m using ‘I’ liberally, I don’t actually use FourSquare before you ask). Why should this have to be the case? Why can’t that data be decentralised? Why can’t we be masters of our own data universe? If my phone acted as a web server then I could expose all of that information without needing those intermediary services. I see a time when we can pass around URLs such as the following: http://jamiesphone.net/location/current - Where is Jamie right now? http://jamiesphone.net/location/2010-04-21 – Where was Jamie on 21st April 2010? http://jamiesphone.net/thoughts/current – What’s on Jamie’s mind right now? http://jamiesphone.net/blog – What documents is Jamie sharing with me? http://jamiesphone.net/calendar/next7days – Where is Jamie planning to be over the next 7 days? and those URLs get served off of the phone in our pockets. If we govern that data then we can control who has access to it and (crucially) how long its available for. Want to wipe yourself off the face of the web? its pretty easy if you’re in control of all the data – just turn your phone off. None of this exists today but I look forward to a time when it does. Opera really were onto something last June when they announced Opera Unite (admittedly Unite only works because Opera provide an intermediary DNS-alike system – it isn’t totally decentralised). Opening up Twitter annotations Last week Twitter held their first developer conference called Chirp where they announced an upcoming new feature called ‘Twitter Annotations’; in short this will allow us to attach metadata to a Tweet thus enhancing the tweet itself. Think of it as a richer version of hashtags. To think of it another way Twitter are turning their data into a humongous Entity-Attribute-Value or triple-tuple store. That alone has huge implications both for the web and Twitter as a whole – the ability to enrich that 140 characters data and thus make it more useful is indeed compelling however today I stumbled upon a blog post from Eugene Mandel entitled Tweet Annotations – a Way to a Metadata Marketplace? where he proposed the idea of allowing tweets to have metadata added by people other than the person who tweeted the original tweet. This idea really fascinated me especially when I read some of the potential uses that Eugene and his commenters suggested. They included: Amazon could attach an ISBN to a tweet that mentions a book. Specialist clients apps for book lovers could be built up around this metadata. Advertisers could pay to place adverts in metadata. The revenue generated from those adverts could be shared with the tweeter or people who add the metadata. Granted, allowing anyone to add metadata to a tweet has the potential to create a spam problem the like of which we haven’t even envisaged but spam hasn’t halted the growth of the web and neither should it halt the growth of data annotations either. The original tweeter should of course be able to determine who can add metadata and whether it should be moderated. As Eugene says himself: Opening publishing tweet annotations to anyone will open the way to a marketplace of metadata where client developers, data mining companies and advertisers can add new meaning to Twitter and build innovative businesses. What Eugene and his followers did not mention is what I think is potentially the most fascinating use of opening up annotations. Google’s success today is built on their page rank algorithm that measures the validity of a web page by the number of incoming links to it and the page rank of the sites containing those links – its a system built on reputation. Twitter annotations could open up a new paradigm however – let’s call it People rank- where reputation can be measured by the metadata that people choose to apply to links and the websites containing those links. Its not hard to see why Google and Microsoft have paid big bucks to get access to the Twitter firehose! Neither of these features, phones as a web server or the ability to add annotations to other people’s tweets, exist today but I strongly believe that they could dramatically enhance the web as we know it today. I hope to look back on this blog post in a few years in the knowledge that these ideas have been put into place. @Jamiet Share this post: email it! | bookmark it! | digg it! | reddit! | kick it! | live it!

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  • SolidQ Journal - free SQL goodness for February

    - by Greg Low
    The SolidQ Journal for February just made it out by the end of February 28th. But again, it's great to see the content appearing. I've included the second part of the article on controlling the execution context of stored procedures. The first part was in December. Also this month, along with Fernando Guerrero's editorial, Analysis Services guru Craig Utley has written about aggregations, Herbert Albert and Gianluca Holz have continued their double-act and described how to automate database migrations,...(read more)

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  • Fastest way to remove non-numeric characters from a VARCHAR in SQL Server

    - by Dan Herbert
    I'm writing an import utility that is using phone numbers as a unique key within the import. I need to check that the phone number does not already exist in my DB. The problem is that phone numbers in the DB could have things like dashes and parenthesis and possibly other things. I wrote a function to remove these things, the problem is that it is slow and with thousands of records in my DB and thousands of records to import at once, this process can be unacceptably slow. I've already made the phone number column an index. I tried using the script from this post: http://stackoverflow.com/questions/52315/t-sql-trim-nbsp-and-other-non-alphanumeric-characters But that didn't speed it up any. Is there a faster way to remove non-numeric characters? Something that can perform well when 10,000 to 100,000 records have to be compared. Whatever is done needs to perform fast. Update Given what people responded with, I think I'm going to have to clean the fields before I run the import utility. To answer the question of what I'm writing the import utility in, it is a C# app. I'm comparing BIGINT to BIGINT now, with no need to alter DB data and I'm still taking a performance hit with a very small set of data (about 2000 records). Could comparing BIGINT to BIGINT be slowing things down? I've optimized the code side of my app as much as I can (removed regexes, removed unneccessary DB calls). Although I can't isolate SQL as the source of the problem anymore, I still feel like it is.

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  • Why are my installed fonts not available in .NET?

    - by Dan Herbert
    I'm trying to render some images with text using a font I just added to my machine and no matter what I do, I can't seem to get the font to become accessible in .NET. I tried using PrivateFontCollection.AddFontFile(filename) and PrivateFontCollection.AddMemoryFont(...) to load the font into memory. Whenever I do this, the method throws a "File Not Found" exception, which is unusual because I get this exception when loading the font from memory, where there should be no files to be "not found". Initially, I thought it may be because the font I was trying to use was in the .pfm format, so I converted the font to .otf and had the same problem. Then I tried installing the .otf font to my Windows Fonts folder so I could pull it from FontFamily.Families. Once I installed the font, it became available in Microsoft Word & Notepad2. However, when I try to load it from FontFamily.Families, it is not included in the array. I thought rebooting my machine would fix the issue but obviously there is something more complicated involved here. Is there something basic I just might have missed when installing the font in my machine (Windows Vista), or is there another way to programmatically load a font that I should be using instead? Is .otf not supported in .NET?

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  • JQUery autocompleter not working properly in IE8

    - by Pete Herbert Penito
    Hi everyone! I have some script which is working in firefox and chrome but in IE 8 I get this error: $.Autocompleter.defaults = { inputClass: "ac_input", resultsClass: "ac_results", loadingClass: "ac_loading", minChars: 1, delay: 400, matchCase: false, matchSubset: true, matchContains: false, cacheLength: 10, max: 100, mustMatch: false, extraParams: {}, selectFirst: true, //the following line throws the error, read down for error message formatItem: function(row) { return row[0]; }, formatMatch: null, autoFill: false, width: 0, multiple: false, multipleSeparator: ", ", highlight: function(value, term) { return value.replace(new RegExp("(?![^&;]+;)(?!<[^<])(" + term.replace(/([\^\$()[]{}*.+\?\|\])/gi, "\$1") + ")(?![^<])(?![^&;]+;)", "gi"), "$1"); }, scroll: true, scrollHeight: 180 }; ` the specific error reads: '0' is null or not an object can I perhaps change the the row[0] to something? This is found in jquery.autocomplete.js and it reads the same in firefox and doesn't cause the error, so i don't really want to change this if at all possible. any advice would help thanks!

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  • JQuery not Working in chrome?

    - by Pete Herbert Penito
    Hi everyone! I have some code here which works perfectly in firefox but not in chrome or IE, my javascript is thus ` $(document).ready(function() { $("#clientLoginPop").show(); $("#clientLoginPop").animate({"left": "-=400px"}, "fast"); }); $("#clientLoginCloseLink").click(function () { $("#clientLoginPop").animate({"left": "+=400px"}, "fast"); }); $("#contactUsPopLink").click(function () { $("#contactUsPop").show(); $("#contactUsPop").animate({"left": "-=437px"}, "fast"); }); $("#contactUsClose").click(function () { $("#contactUsPop").animate({"left": "+=474px"}, "fast"); }); }); ` and finally the css of the div looks like this, i think rather importantly it's aligned to the right of the browser: (the client login div looks similar just a different height) ` #contactUsPop { width:437px; right:-437px; margin-top:220px; position:fixed; height:217px; background-color:white; z-index:2; } ` so what happens in firefox is the div animates to the left and then when it closes it moves back to the right. when in chrome the div doesn't seem to pop up at all? the URL of the site is this: http://clearcreativegroup.com/devcorner/clear3/ the tabs are on the right hand side of the browser, any advice would help tons, thank you!

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  • Adding a drop down menu with jquery

    - by Pete Herbert Penito
    Hi everyone! Here's the situation I have a webpage which has one drop down called prefer. I wanted the user to be able to choose one option and then have a link next to it called "Add" which generates another textbox with the same options, i was going to use jquery to show an additional drop down. But if possible I wanted to put the select box in an array and then loop through this process infinitely. so I could call select name="prefer[]" and somehow put in a variable which increases. Afterwards, I could use php to cycle through the array and utilize each one. Could I do this with Javascript somehow?

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  • Delete, Truncate or Drop MySQL question

    - by Pete Herbert Penito
    Hi Everyone! I am attempting to clean out a table but not get rid of the actual structure of the table, i have the following columns: id, username, date, text the id is auto incrementing, I don't need to keep the ID number, but i do need it to keep its auto-incrementing characteristic. I've found delete and truncate but I'm worried one of these will completely drop the entire table rendering future insert commands useless. Thank you, Everybody!

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  • how to create thumbnail system for MP4 files

    - by Pete Herbert Penito
    Hi everyone! I know I know, why am I using MP4 still?? It's because I have like 100 files already in this format and I need to upload to a website, I have the mp4 file embeded in the site already and the file played changes according to php. but what I really need is a way to dynamically create a thumbnail or take a snapshot of the video file to display on the page. I've read a couple things online but they all require the file type to be in FLV, what would be the best way to accomplish this? Thank you Guys!

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  • How can I get the dimensions of a drawn string without padding?

    - by Dan Herbert
    I'm trying to create an image with some text on it and I want the image's size to match the size of the rendered text. When I use System.Windows.Forms.TextRenderer.MeasureText(...) to measure the text, I get dimensions that include font padding. When the text is rendered, it seems to use the same padding. Is there any way to determine the size of a string of text and then render it without any padding? This is the code I've tried: // Measure the text dimensions var text = "Hello World"; var fontFamily = new Font("Arial", 30, FontStyle.Regular); var textColor = new SolidBrush(Color.Black); Size textSize = TextRenderer.MeasureText(text, fontFamily, Size.Empty, TextFormatFlags.NoPadding); // Render the text with the given dimensions Bitmap bmp = new Bitmap(textSize.Width, textSize.Height); Graphics g = Graphics.FromImage(bmp); g.TextRenderingHint = TextRenderingHint.AntiAliasGridFit; g.DrawString(text, fontFamily, textColor, new PointF(0, 0)); bmp.Save("output.png", ImageFormat.Png); This is what currently gets rendered out: This is what I want to render: I also looked into Graphics.MeasureString(...), but that can only be used on an existing Graphics object. I want to know the size before creating the image. Also, calling Graphics.MeasureString(...) returns the same dimensions, so it doesn't help me any.

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  • Favicon Issue with Webkit browsers

    - by Pete Herbert Penito
    Hi everyone! I'm having problems with putting a favicon on my website! I have this code <link rel="shortcut icon" type="image/ico" href="img/favicon.ico"> And for some reason Firefox shows the favicon fine, but on webkit browsers its not showing up. I tried Google Chrome and Safari on a Mac and its not showing up, do I need to do something for these browsers?

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