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  • mod_fcgid process doesn't respawn

    - by aaronsw
    I have a Python script running on my server as a FastCGI using Apache2 and mod_fcgid. I let it spawn up to five processes. But I soon get messages like these in the Apache logs: [Wed Sep 02 23:16:34 2009] [warn] (103)Software caused connection abort: mod_fcgid: ap_pass_brigade failed in handle_request function [Wed Sep 02 23:16:35 2009] [warn] (103)Software caused connection abort: mod_fcgid: ap_pass_brigade failed in handle_request function and then Apache doesn't seem to recognize that all its processes are dead (I have a max of 5 backends) and refuses to spawn new ones: [Wed Sep 02 23:26:16 2009] [notice] mod_fcgid: /var/www/hacks.og.theinfo.org/picker.fcgi total process count 5 >= 5, skip the spawn request [Wed Sep 02 23:26:17 2009] [notice] mod_fcgid: /var/www/hacks.og.theinfo.org/picker.fcgi total process count 5 >= 5, skip the spawn request at which point it refuses to respond to requests from the outside world. This doesn't seem to happen with my other FastCGIs, which all use the same Apache config: <IfModule mod_fcgid.c> AddHandler fcgid-script .fcgi IPCConnectTimeout 20 MaxProcessCount 5 DefaultMaxClassProcessCount 2 DefaultMinClassProcessCount 1 </IfModule> Any idea what causes it?

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  • Glusterfs : 'No route to host' for fstab mount in CentOS

    - by son_of_fire
    I am using glusterfs, and am using fstab in this way: <IPADDRESS>:/<VOLUMENAME> /some/mount/point glusterfs defaults,_netdev 0 0 but the logs for the mount continue to say the following. [<TIMESTAMP>] E [socket.c:2161:socket_connect_finish] 0-<VOLUMENAME>-client-1: connection to <IPADDRESS>:24007 failed (No route to host) I know this is not true, since when the system is up and running, I can easily issue a mount and the volume gets mounted. (I've done this by using rc.local) after reading more I have seen that using _netdev is preferred, and that if the host cannot be reached netfs will remount the volume after the network comes up, but that is not happening. (netfs is running). Is there a way to make the mount happen at a different time without using a script? (I would prefer to use fstab to manage the mounting even though I can use a script.)

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  • OpenJs mysql not reading database [migrated]

    - by Benedikt Wutzi
    I try to access a mysql table using OpenJs Grid. I already doublechecked if the database "partsdb" and the table "parts" exists and it can be accessed from the commandline. Currently I'm using the must basic example: members.php: <!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <title>Members Page</title> <script> $(function() { $(".parts").grid(); }); </script> </head> <body> <div id="container"> <h1>Members Page</h1> <table action="ajax.php"> <tr> <th col="id">Id</th> <th col="name">Name</th> </tr> </table> <a href='<?php echo base_url()."main/logout" ?>'>Logout</a> </div> and ajax.php <?php mysql_connect("localhost","****","*****"); mysql_select_db("partsdb"); require_once("grid.php"); $grid = new Grid("parts"); ?> When I run php directly on ajax.php I get an error telling me: " Unknown column 'parts.' in 'field list' " and the table shows only the headers. What am I doing wrong?

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  • Better Agile Retrospectives

    - by thycotic
    David has posted about the Agile Retrospectives book and his experiences.  Incremental change is fundamental to so many agile practices (probably the most important in my opinion) – and retrospectives are the best way to foster discussion and prompt change.  The problem is how to get everyone involved in the process.   Jonathan Cogley is the CEO of Thycotic Software, an agile software services and product development company based in Washington DC.  Secret Server is our flagship enterprise password vault.

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  • How do I configure custom routes when an interface is configured?

    - by ManicDee
    Other Superuser questions have addressed the issue of adding custom routes to access e.g.: multiple networks of a corporate network through one interface, while accessing the Internet through another interface. So assuming that I have a script to add specific routes when en0 is configured, and a separate script to add specific routes when en1 is configured, is there some way I can trigger those scripts to run automatically when Mac OS X/Darwin starts and configures those interfaces? Back in my Linux days, it was possible to add an option in /etc/network/interfaces along the lines of: iface eth0 inet dhcp up /usr/local/sbin/eth0-routes-up Is there something similar for Mac OS X?

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  • Retrieving a specific value from “df -h” using shell

    - by diegodias
    When I use df -h, I get the following output: Filesystem Size Used Avail Use% Mounted on /dev/mapper/VolGroup00-LogVol00 59G 2.2G 54G 4% / /dev/sda1 122M 38M 78M 33% /boot tmpfs 1.1G 0 1.1G 0% /dev/shm 10.10.0.105:/somepath 11T 8.4T 2.1T 81% /storage4 10.11.0.101:/somepath 15T 8.9T 5.9T 61% /storage1 /dev/mapper/patha 5.0T 255G 4.8T 5% /storage5_vol0 /dev/mapper/pathb 5.0T 195G 4.9T 4% /storage5_vol1 /dev/mapper/pathc 5.0T 608G 4.5T 12% /storage5_vol2 I want to write a script that gets the value of Avail column on a specific storage. I used to use df -k /storage_name | tail -1 | awk '{print $3}' But the FileSystem column can have a value or not .. which would change the variable of my script from $3 to $4. How can I get the Avail on a single command line even if there are no values on the previous columns?

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  • Apple Aluminum Keyboard Via Bluetooth - Fn Key Problem

    - by Richard
    I'm connecting an Apple Bluetooth Aluminum keyboard (this one) to my Lubuntu setup using the blueman applet. The keyboard types fine, but I would like to use its fn key to change screen brightness changing, page-up (fn+ctrl+down), page-down (fn+ctrl+up), et cetera. Right now the fn key doesn't seem to work. When I use xev, I don't see anything happen when I press fn. Does the keyboard not send this to the computer at all? Do I need to configure blueman's "Input Service" setting to make this an Apple (rather than a generic) keyboard? (It's not obvious how to do this.) Is xev just not showing the fn key? Where in this stack of software do I need to make a change to achieve the desired behaviour? Thanks!

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  • DPMS, keep screen off when lid shut

    - by Evan Teran
    I have a laptop running linux. In my xorg configuration, I have DPMS setup so that the screen automatically turns off during several events. In addition to that I have to the following script tied to ACPI lid open/close events: #!/bin/sh for i in $(pidof X); do CMD=$(ps --no-heading $i) XAUTH="$(echo $CMD | sed -n 's/.*-auth \(.*\)/\1/p')" DISPLAY="$(echo $CMD | sed -n 's/.* \(:[0-9]\) .*/\1/p')" # turn the display off or back on export XAUTHORITY=$XAUTH /usr/bin/xset -display $DISPLAY dpms force $1 done Basically, this script takes one parameter ("on" or "off") then iterates through all of my running X sessions and either turns on or turns off the monitor. Here's my issue. When I close the lid of the laptop, the screen goes off as expected, but if a mouse event occurs (like if something bumps into the table...) then the screen turns back on even though it is closed (I can see the light through the side of the laptop). Is there a way to prevent the screen from turning on during a mouse event if the lid is closed?

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  • How should I work out VAT (UK tax) in my eCommerce site?

    - by Leonard Challis
    We have an ecommerce system in place. The sales actually go through Sage, so we have an export script from our system that uses a third-party Sage Importer program. With a new version of this importer, values are checked more thoroughly. We are getting 1 pence discrepancies because of the way rounding works - our system has always held prices and worked to 4 decimal places. In the checkout the totals would be worked out first, then the rounding to 2 decimal places. The importer does rounding first, though. So, for instance: Our way: Product 1: £13.4561 Qty: 2 Total inc VAT = £32.29 (to 2dp) Importer way: Our way: Product 1: £13.4561 Qty: 2 Total inc VAT = £32.30 (to 2dp) Management are reluctant to lose the 4dp but the developers of the Sage importer have said that this is correct and makes sense -- you woudn't sell a product for £13.4561 in a shop, nor would you charge someone tax at 4 decimal places. I contacted the HMRC and the operator didn't really give me much to go on, telling me a technician would phone back, to which they haven't and I'm still waiting after almost a week and numerous follow-up calls. I did find a PDF on the HMRC's web site, but this did about us much to confuse me as it did to answer my questions. I see that they're happy for people to round up or down, as long it is consistent, but I can't tell whether it should be done on a line by line basis or on the end total of the order. We are now in the position where we need to decide whether it's worth us doing one of the following, or something completely different. Please advise with any experience or information I can read. Change all products on the site to use 2dp Keep 4dp but round each line in the order to 2dp before working out tax Keep it as it is and "fudge" the values at the export script (i.e. make that values correct by adding or subtracting 1p and changing the shipping cost to make the totals still work out) Any thoughts?

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  • Setting up Google Analytics for multiple subdomains

    - by Andrew G. Johnson
    so first here's a snippet of my current Analytics javascript: var _gaq = _gaq || []; _gaq.push(['_setAccount', 'UA-30490730-1']); _gaq.push(['_setDomainName', '.apartmentjunkie.com']); _gaq.push(['_setSiteSpeedSampleRate', 100]); _gaq.push(['_trackPageview']); (function() { var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; var s = document.getElementsByTagName('script')[0];s.parentNode.insertBefore(ga, s); })(); So if you wanna have a quick peak at the site the url is ApartmentJunkie.com, keep in mind the site is pretty bare bones but you'll get the idea -- basically it's very similar to craigslist in the sense that it's in the local space so people pick a city then get sent to a subdomain that is specific for that city, e.g. winnipeg.mb.apartmentjunkie.com. I put that up late last night then had a look at the analytics and found that I am seeing only the request uri portion of the URLs in analytics as I would with any other site only with this one it's a problem as winnipeg.mb.apartmentjunkie.com/map/ and brandon.mb.apartmentjunkie.com/map/ are two different pages and shouldn't be lumped together as /map/ I know the kneejerk response is likely going to be "hey just setup a different google analytics profile for each subdomain" but there will eventually be a lot of subdomains so google's cap of 50 is going to be too limited and even more important I want to see the data in aggregate for the most part. I am thinking of making a change to the javascript, to something like: _gaq.push(['_trackPageview',String(document.domain) + String(document.location)]); But am unsure if this is the best way and figured someone else on wm.se would have had a similar situation that they could talk a bit about.

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  • Launchd execute command when folder contents modified or changed.

    - by ThomasReggi
    For the past two days i've been trying to get a launchd plist to execute a script "program" when the contents of a folder on my desktop contents have modified or changed. I've gone through tons of configuration settings and have tried the Users/me/Desktop/folderinquestion and Users/me/Desktop/folderinquestion (with and without trailing slash). The script executes only when something is added or removed but it doesn't recognize when files are updated and subdirectories. launchd is really my last hope to getting this to working i've already exausted folder actions, and bash scripts, uninstallable linux methods etc. I have used Lingon to create my plists and have followed this youtube tutorial. Any help would be greatly appreciated. This is what I have right now, and like I said does not work when folder is modified or changed IDEA: Thinking about creating two separate plists that reference each other one plist can watch a folder for additions and subtractions and when one occurs it can create another plist that watches every file in the folder, this could also be recursive and count in for subdirectories.

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  • Bridging the gap between developers and testers with VS 2010

    - by Etienne Tremblay
    Hey everyone, I know it’s been an eternity since I blogged but I have so much to do that I unfortunately need to prioritize.  Vincent Grondin and I did a 7h presentation on the new developer and tester tools available in the VS 2010 suite.  It was a blast.  We did it in front of an audience (around 120) and it was taped.  We did it as a play and really didn’t look at the crowd at all we were training each other on the technology. It is now available for anyone that would like to watch it at this location: http://www.devteach.com/ALM-TFS2010-Bridgingthegap.aspx What we covered in the full day event was Migration to TFS 2010 (10h00) 1-Migration of VSS to TFS (20 min.) 2-Automating the Build (Something you can't do with VSS) ( 20 Min.) 3-User story (Real application context for this presentation) (20 min.) 10h00 Pause Manuel Tests by Dev ( 11h30) 4-Adding a tester to the team (Into to MTM) (20 min.) 5-Define tests (what is a white bug) (20 min.) 6-Fix the bug and show Intellitrace and Play back the test (20 min.) 12h15 Lunch Manuel testing for maintenance (13h30) 7- Implement new Feature (web service) and Identify bug with MTM and branch for a production fix and also add a new Build script (20 min.) 8- Fix bug in production branch, Playback tests, merge the change in main branch (20 min.) Manuel testing with the lab manager (14h30) 9- Intro to Lab manager and environment (20 min.) 10- Change build script to deploy to lab and test with web service in lab environment. (20 min.) 15h15 Pause Automate UI test with CodeUI (15h30) 11- Reducing the effort of testing the UI (20 min.) 12- Repeating testing to make sure the application is working properly (20 min.) 13- Automate Coded UI with the Lab environment (20 min.) 16h30 Conclusions As you can see lots of stuff!! Enjoy the show and let us know how you like it Cheers, ET Technorati Tags: VS 2010,Testing Tools,ALM,Training

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  • Running scheduled web scripts in a Windows Server environment

    - by Dan Murfitt
    I'm trying to get a scheduled web script running on a Windows Server and so far the only way I've managed to automate this process is by using the Task Scheduler to open Internet Explorer with the web address as a parameter. I then need to create a separate task to run just after this task to close Internet Explorer (otherwise the task doesn't complete). Is there a better way of doing this? I've also managed to run the script by calling the web address through a Telnet connection to the web server (GET /web/address/here) but I haven't found a way of automating this process on a scheduled basis. Any ideas appreciated

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  • rsync problems and security concerns

    - by MB.
    Hi I am attempting to use rsync to copy files between two linux servers. both on 10.04.4 I have set up the ssh and a script running under a cron job. this is the message i get back from the cron job. To: mark@ubuntu Subject: Cron ~/rsync.sh Content-Type: text/plain; charset=ANSI_X3.4-1968 X-Cron-Env: X-Cron-Env: X-Cron-Env: X-Cron-Env: Message-Id: <20120708183802.E0D54FC2C0@ubuntu Date: Sun, 8 Jul 2012 14:38:01 -0400 (EDT) rsync: link_stat "/home/mark/#342#200#223rsh=ssh" failed: No such file or directory (2) rsync: opendir "/Library/WebServer/Documents/.cache" failed: Permission denied (13) rsync: recv_generator: mkdir "/Library/Library" failed: Permission denied (13) * Skipping any contents from this failed directory * rsync error: some files/attrs were not transferred (see previous errors) (code 23) at main.c(1060) [sender=3.0.7] Q.1 can anyone tell me why I get this message -- rsync: link_stat "/home/mark/#342#200#223rsh=ssh" failed: No such file or directory (2) the script is: #!/bin/bash SOURCEPATH='/Library' DESTPATH='/Library' DESTHOST='192.168.1.15' DESTUSER='mark' LOGFILE='rsync.log' echo $'\n\n' >> $LOGFILE rsync -av –rsh=ssh $SOURCEPATH $DESTUSER@$DESTHOST:$DESTPATH 2>&1 >> $LOGFILE echo “Completed at: `/bin/date`” >> $LOGFILE Q2. I know I have several problems with the permissions all of the files I am copying usually require me to use sudo to manipulate them. My question is then is there a way i can run this job without giving my user root access or using root in the login ?? Thanks for the help .

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  • How to Create a Minimize All Windows (Win + M) Hotkey for Mac OS X

    - by The Geek
    Windows users have been able to minimize every window on their desktop ever since keyboards with the Win key started showing up — just tap WIN + M on your keyboard, and every window is minimized. For Mac OS X, it’s not quite as simple. You can, of course, use the CMD + OPT + H + M shortcut key combination to hide most windows… but that’s a lot of keys to hit at once, and it doesn’t always minimize everything in my experience. So like everything else I wanted from Windows, it was time to figure out how to get it on OS X as well. This method uses QuickSilver to provide the shortcut key trigger — if there’s a better way to do that, please let us know. Luckily OS X includes a nice scripting platform, and we can use the following script from a helpful person over at SuperUser to make this all happen. tell application "Finder" to activate tell application "System Events" tell application process "Finder" tell menu bar 1 click menu item "Hide Others" of menu of menu bar item "Finder" click menu item "Minimize All" of menu of menu bar item "Window" end tell end tell end tell Open up a new AppleScript Editor window and paste in the script from above. Then go to File and Save.    

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  • Create Advanced Panoramas with Microsoft Image Composite Editor

    - by Matthew Guay
    Do you enjoy making panoramas with your pictures, but want more features than tools like Live Photo Gallery offer?  Here’s how you can create amazing panoramas for free with the Microsoft Image Composite Editor. Yesterday we took a look at creating panoramic photos in Windows Live Photo Gallery. Today we take a look at a free tool from Microsoft that will give you more advanced features to create your own masterpiece. Getting Started Download Microsoft Image Composite Editor from Microsoft Research (link below), and install as normal.  Note that there are separate version for 32 & 64-bit editions of Windows, so make sure to download the correct one for your computer. Once it’s installed, you can proceed to create awesome panoramas and extremely large image combinations with it.  Microsoft Image Composite Editor integrates with Live Photo Gallery, so you can create more advanced panoramic pictures directly.  Select the pictures you want to combine, click Extras in the menu bar, and select Create Image Composite. You can also create a photo stitch directly from Explorer.  Select the pictures you want to combine, right-click, and select Stitch Images… Or, simply launch the Image Composite Editor itself and drag your pictures into its editor.  Either way you start a image composition, the program will automatically analyze and combine your images.  This application is optimized for multiple cores, and we found it much faster than other panorama tools such as Live Photo Gallery. Within seconds, you’ll see your panorama in the top preview pane. From the bottom of the window, you can choose a different camera motion which will change how the program stitches the pictures together.  You can also quickly crop the picture to the size you want, or use Automatic Crop to have the program select the maximum area with a continuous picture.   Here’s how our panorama looked when we switched the Camera Motion to Planar Motion 2. But, the real tweaking comes in when you adjust the panorama’s projection and orientation.  Click the box button at the top to change these settings. The panorama is now overlaid with a grid, and you can drag the corners and edges of the panorama to change its shape. Or, from the Projection button at the top, you can choose different projection modes. Here we’ve chosen Cylinder (Vertical), which entirely removed the warp on the walls in the image.  You can pan around the image, and get the part you find most important in the center.  Click the Apply button on the top when you’re finished making changes, or click Revert if you want to switch to the default view settings. Once you’ve finished your masterpiece, you can export it easily to common photo formats from the Export panel on the bottom.  You can choose to scale the image or set it to a maximum width and height as well.  Click Export to disk to save the photo to your computer, or select Publish to Photosynth to post your panorama online. Alternately, from the File menu you can choose to save the panorama as .spj file.  This preserves all of your settings in the Image Composite Editor so you can edit it more in the future if you wish.   Conclusion Whether you’re trying to capture the inside of a building or a tall tree, the extra tools in Microsoft Image Composite Editor let you make nicer panoramas than you ever thought possible.  We found the final results surprisingly accurate to the real buildings and objects, especially after tweaking the projection modes.  This tool can be both fun and useful, so give it a try and let us know what you’ve found it useful for. Works with 32 & 64-bit versions of XP, Vista, and Windows 7 Link Download Microsoft Image Composite Editor Similar Articles Productive Geek Tips Change or Set the Greasemonkey Script Editor in FirefoxNew Vista Syntax for Opening Control Panel Items from the Command-lineTune Your ClearType Font Settings in Windows VistaChange the Default Editor From Nano on Ubuntu LinuxMake MSE Create a Restore Point Before Cleaning Malware TouchFreeze Alternative in AutoHotkey The Icy Undertow Desktop Windows Home Server – Backup to LAN The Clear & Clean Desktop Use This Bookmarklet to Easily Get Albums Use AutoHotkey to Assign a Hotkey to a Specific Window Latest Software Reviews Tinyhacker Random Tips Xobni Plus for Outlook All My Movies 5.9 CloudBerry Online Backup 1.5 for Windows Home Server Snagit 10 Get a free copy of WinUtilities Pro 2010 World Cup Schedule Boot Snooze – Reboot and then Standby or Hibernate Customize Everything Related to Dates, Times, Currency and Measurement in Windows 7 Google Earth replacement Icon (Icons we like) Build Great Charts in Excel with Chart Advisor

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  • Even EA's Have Bad Days - it's Time to Reset

    - by Pat Shepherd
    I saw this article and thought I'd share it because, even we EA's have bad days and the 7 points listed are a great way for you to hit the "reset" button. From Geoffrey James on INC.COM, here are 7 ways to change your view of things when, say, you are hitting a frustration point coordinating stakeholders to agree on an approach (never happens, right?) Positive Thinking: 7 Easy Ways to Improve a Bad Day http://www.inc.com/geoffrey-james/positive-thinking-7-easy-ways-to-improve-a-bad-day.html To paraphrase:          You can decide (in an instant) to change patterns of the past          Believe in (or even visualize) good things happening, and they will          Keep a healthy perspective on the work-life / life-life continuum (what things REALLY matter in the big scheme of things)                  Focus on the good (the laws of positive-attraction apply)

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  • Determine whether a link points to a file on local host or foreign domain [migrated]

    - by user107157
    This has been a burning question for me ever since and I think it's interesting enough to discuss it on the forums. As most will know, in websites we include anchor links, stylesheets, script files (javascript) and images. For anchor links we use the form <a href="..." /> For stylesheets we may use the form <link rel="stylesheet" type="text/css" href="..." /> For javascript we may use <script src="..." /> For images we use <img src="..." /> So, the question is this: How do we know that what is in the link pointer (i.e. replacing the ... in each example) is a local file or a foreign entity? To make it clear, lets say I create a local file named "ashish.com". Now, my purpose is to create a link so that anybody who clicks on it may download it. So, my code would be thus: <a href="ashish.com">Download It</a> But this makes it ambiguous. I could also be referring to a website named "ashish.com" So, how does the computer magically know which one I mean? Or does it even know this? What would happen in such a scenario?

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  • In Joomla In htaccess REQUEST_URI is always returning index.php instead of SEF URL

    - by Saumil
    I have installed joomsef version 3.9.9 with the Joomla 1.5.25. Now I want to set https for some of the section of my site(e.g URI starts with /events/) while wanting rest of all urls on http.I am setting rules in .htaccess file but not getting output as expected. I am checking REQUEST_URI of the SEF urls but always getting index.php as URI. Here is my htaccess code. ########## Begin - Custom redirects # # If you need to redirect some pages, or set a canonical non-www to # www redirect (or vice versa), place that code here. Ensure those # redirects use the correct RewriteRule syntax and the [R=301,L] flags. # ########## End - Custom redirects # Uncomment following line if your webserver's URL # is not directly related to physical file paths. # Update Your Joomla! Directory (just / for root) # RewriteBase / ########## Begin - Joomla! core SEF Section # RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}] # # If the requested path and file is not /index.php and the request # has not already been internally rewritten to the index.php script RewriteCond %{REQUEST_URI} !^/index\.php # and the request is for root, or for an extensionless URL, or the # requested URL ends with one of the listed extensions RewriteCond %{REQUEST_URI} (/[^.]*|\.(php|html?|feed|pdf|raw))$ [NC] # and the requested path and file doesn't directly match a physical file RewriteCond %{REQUEST_FILENAME} !-f # and the requested path and file doesn't directly match a physical folder RewriteCond %{REQUEST_FILENAME} !-d # internally rewrite the request to the index.php script RewriteRule .* index.php [L] # ########## End - Joomla! core SEF Section # Here is my code e.g site url is http://mydomain.com/events RewriteCond %{REQUEST_URI} ^/(events)$ RewriteCond %{HTTPS} !ON RewriteRule (.*) https://%{REQUEST_HOST}%{REQUEST_URI}/$1 [L,R=301] I am not getting why REQUEST_URI is reffering index.php even though my url in address bar is like this http://mydomain.com/events . I am using JOOMSEF(Joomla extension for SEF URLS).If I am removing other rules from the htaccess file then joomla stops working. I am not getting a way to handle this as I am not expert.Please let me know if someone has passed through same situation and have solution or suggest some work around. Thanks

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  • Implementing dry-run in bash scripts

    - by Apikot
    How would one implement a dry-run option in a bash script? I can think of either wrapping every single command in an if and echoing out the command instead of running it if the script is running with dry-run. Another way would be to define a function and then passing each command call through that function. Something like: function _run () { if [[ "$DRY_RUN" ]]; then echo $@ else $@ fi } _run mv /tmp/file /tmp/file2 DRY_RUN=true _run mv /tmp/file /tmp/file2 Is this just wrong and there is a much better way of doing it?

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  • Securely wiping a file on a tmpfs

    - by Nanzikambe
    I have a script that decrypts some data to a tmpfs, the directory is secure (permissions), the machine's swap is encrypted (random key on boot) and when the script is done it does a 35 pass wipe (Peter Gutmann) of the cleartext on the tmpfs . I do this because I'm aware wiping files on a journaling file system is insecure, data may be recovered. For discussion, here're the relevant bits extracted: # make the tmpfs mkdir /mnt/tmpfs chmod 0700 /mnt/tmpfs mount -t tmpfs -o size=1M tmpfs /mnt/tmpfs cd /mnt/tmpfs # decrypt the data gpg -o - <crypted_input_file> | \ tar -xjpf - # do processing stuff # wipe contents find . -type f -exec bcwipe -I {} ';' # nuke the tmpfs cd .. umount -f /mnt/tmpfs rm -fR /mnt/tmpfs So, my question, assuming for the moment that nobody is able to read the cleartext in the tmpfs while it exists (I use umask to set cleartext to 0600), is there any way any trace of the cleartext could remain either in memory or on disk after the snippet above completes?

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  • How to setup a simple self-hosted dynamic DNS server

    - by Cerin
    I have a small internal network of physical machines running hypervisors, which in turn run several KVM Ubuntu virtual machines. How would I setup an internal dynamic DNS server so that when I run a script to create a new virtual machine, that VM could automatically register itself in the DNS server? Bind seems to be the standard DNS server for Linux, but it seems designed for a much more "static" DNS model. Dynamically updating this would require a complicated script that would have to SSH into the DNS server, edit configuration files, and then restart the server. This doesn't seem like a very elegant solution. Are there better options? I saw a similar question, although they're asking for a solution for a public setting on Amazon. My servers are entirely private, and I don't want to rely on an external VM host or Dynamic DNS provider.

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  • Is ServerManager module available on Windows 7?

    - by ruslan
    Is ServerManager module available on Windows 7 Ultimate ? I think (but I'm not sure because I never looked at output before) the PS script that I have worked before but after some problems with IIS7 installation it stopped working. Following script import-module servermanager fails with error Import-Module : The specified module 'servermanager' was not loaded because no valid module file was found in any module directory. At line:1 char:14 + import-module <<<< servermanager + CategoryInfo : ResourceUnavailable: (servermanager:String) [Import-Module], FileNotFoundException + FullyQualifiedErrorId : Modules_ModuleNotFound,Microsoft.PowerShell.Commands.ImportModuleCommand I found recommendation to run Dism.exe /Online /Enable-Feature /FeatureName:ServerManager-PSH-Cmdlets on my machine but it also fails with error Feature name ServerManager-PSH-Cmdlets is unknown.

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  • WPF: Timers

    - by Ilya Verbitskiy
    I believe, once your WPF application will need to execute something periodically, and today I would like to discuss how to do that. There are two possible solutions. You can use classical System.Threading.Timer class or System.Windows.Threading.DispatcherTimer class, which is the part of WPF. I have created an application to show you how to use the API.     Let’s take a look how you can implement timer using System.Threading.Timer class. First of all, it has to be initialized.   1: private Timer timer; 2:   3: public MainWindow() 4: { 5: // Form initialization code 6: 7: timer = new Timer(OnTimer, null, Timeout.InfiniteTimeSpan, Timeout.InfiniteTimeSpan); 8: }   Timer’s constructor accepts four parameters. The first one is the callback method which is executed when timer ticks. I will show it to you soon. The second parameter is a state which is passed to the callback. It is null because there is nothing to pass this time. The third parameter is the amount of time to delay before the callback parameter invokes its methods. I use System.Threading.Timeout helper class to represent infinite timeout which simply means the timer is not going to start at the moment. And the final fourth parameter represents the time interval between invocations of the methods referenced by callback. Infinite timeout timespan means the callback method will be executed just once. Well, the timer has been created. Let’s take a look how you can start the timer.   1: private void StartTimer(object sender, RoutedEventArgs e) 2: { 3: timer.Change(TimeSpan.Zero, new TimeSpan(0, 0, 1)); 4:   5: // Disable the start buttons and enable the reset button. 6: }   The timer is started by calling its Change method. It accepts two arguments: the amount of time to delay before the invoking the callback method and the time interval between invocations of the callback. TimeSpan.Zero means we start the timer immediately and TimeSpan(0, 0, 1) tells the timer to tick every second. There is one method hasn’t been shown yet. This is the callback method OnTimer which does a simple task: it shows current time in the center of the screen. Unfortunately you cannot simple write something like this:   1: clock.Content = DateTime.Now.ToString("hh:mm:ss");   The reason is Timer runs callback method on a separate thread, and it is not possible to access GUI controls from a non-GUI thread. You can avoid the problem using System.Windows.Threading.Dispatcher class.   1: private void OnTimer(object state) 2: { 3: Dispatcher.Invoke(() => ShowTime()); 4: } 5:   6: private void ShowTime() 7: { 8: clock.Content = DateTime.Now.ToString("hh:mm:ss"); 9: }   You can build similar application using System.Windows.Threading.DispatcherTimer class. The class represents a timer which is integrated into the Dispatcher queue. It means that your callback method is executed on GUI thread and you can write a code which updates your GUI components directly.   1: private DispatcherTimer dispatcherTimer; 2:   3: public MainWindow() 4: { 5: // Form initialization code 6:   7: dispatcherTimer = new DispatcherTimer { Interval = new TimeSpan(0, 0, 1) }; 8: dispatcherTimer.Tick += OnDispatcherTimer; 9: } Dispatcher timer has nicer and cleaner API. All you need is to specify tick interval and Tick event handler. The you just call Start method to start the timer.   private void StartDispatcher(object sender, RoutedEventArgs e) { dispatcherTimer.Start(); // Disable the start buttons and enable the reset button. } And, since the Tick event handler is executed on GUI thread, the code which sets the actual time is straightforward.   1: private void OnDispatcherTimer(object sender, EventArgs e) 2: { 3: ShowTime(); 4: } We’re almost done. Let’s take a look how to stop the timers. It is easy with the Dispatcher Timer.   1: dispatcherTimer.Stop(); And slightly more complicated with the Timer. You should use Change method again.   1: timer.Change(Timeout.InfiniteTimeSpan, Timeout.InfiniteTimeSpan); What is the best way to add timer into an application? The Dispatcher Timer has simple interface, but its advantages are disadvantages at the same time. You should not use it if your Tick event handler executes time-consuming operations. It freezes your window which it is executing the event handler method. You should think about using System.Threading.Timer in this case. The code is available on GitHub.

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