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• Why can't Ubuntu find an ext3 filesystem on my hard-drive?

  - by urig

  This question is related to this question: Not enough components to start the RAID array? I'm trying to retrieve data from a "Western Digital MyBook World Edition (white light)" NAS device. This is basically an embedded Linux box with a 1TB HDD in it formatted in ext3. It stopped booting one day for no apparent reason. I have extracted the HDD from the NAS device and installed it in a desktop machine running Ubuntu 10.10 in the hope of accessing the files on the drive. I have followed instructions in this forum post, intended to mount the drive through Terminal: http://mybookworld.wikidot.com/forum/t-90514/how-to-recover-data-from-wd-my-book-world-edition-nas-device#post-976452 I have identified the partition that I want to mount and recover files from as /dev/sd4 by running "fdisk -l" and getting this: Disk /dev/sdb: 1000.2 GB, 1000204886016 bytes 255 heads, 63 sectors/track, 121601 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x0001cf00 Device Boot Start End Blocks Id System /dev/sdb1 5 248 1959930 fd Linux raid autodetect /dev/sdb2 249 280 257040 fd Linux raid autodetect /dev/sdb3 281 403 987997+ fd Linux raid autodetect /dev/sdb4 404 121601 973522935 fd Linux raid autodetect// When I try to mount using: "mount -t ext3 /dev/sdb4 /media/xyz" I get the following error: mount: wrong fs type, bad option, bad superblock on /dev/sdb4, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so And "dmesg | tail" shows me: [ 15.184757] [drm] Initialized nouveau 0.0.16 20090420 for 0000:01:00.0 on minor 0 [ 15.986859] [drm] nouveau 0000:01:00.0: Allocating FIFO number 1 [ 15.988379] [drm] nouveau 0000:01:00.0: nouveau_channel_alloc: initialised FIFO 1 [ 16.353379] EXT4-fs (sda5): re-mounted. Opts: errors=remount-ro,commit=0 [ 16.705944] tg3 0000:02:00.0: eth0: Link is up at 100 Mbps, full duplex [ 16.705951] tg3 0000:02:00.0: eth0: Flow control is off for TX and off for RX [ 16.706102] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready [ 19.125673] EXT4-fs (sda5): re-mounted. Opts: errors=remount-ro,commit=0 [ 27.600012] eth0: no IPv6 routers present [ 373.478031] EXT3-fs (sdb4): error: can't find ext3 filesystem on dev sdb4. I guess that last line is the punch line :) Why can't it find the ext3 filesystem on my drive? What do I need to do to mount this partition and copy its contents? Does it have anything to do with the drive being part of a RAID Array (see question mentioned above)? Many thanks to any who can help.

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• Resize the /var directory in redhat enterprise edition 4

  - by Sri

  I am running NDB mysql. the log files fills up the /var directory. therefore i cant start the ndbd service now. as a temporary fix, i have deleted the log files and again working fine. but again the log files fill up the /var directory. i got plenty of space in other partition. therefore i would like to swap the partition from one directory to /var. here if my input from df -h Filesystem Type Size Used Avail Use% Mounted on /dev/mapper/VolGroup00-LogVol00 ext3 54G 2.9G 49G 6% / /dev/cciss/c0d0p1 ext3 99M 14M 81M 14% /boot none tmpfs 1013M 0 1013M 0% /dev/shm /dev/cciss/c0d0p2 ext3 9.7G 9.7G 0 100% /var there are plenty of space in /dev/mapper/VolGroup00-LogVol00. Therefore i will like to swap 10 G space from this directory to /var. could you please help me out to solve this problem?

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• Restart logging to a new file (Python)

  - by compie

  I'm using the following code to initialize logging in my application. logger = logging.getLogger() logger.setLevel(logging.DEBUG) # log to a file directory = '/reserved/DYPE/logfiles' now = datetime.now().strftime("%Y%m%d_%H%M%S") filename = os.path.join(directory, 'dype_%s.log' % now) file_handler = logging.FileHandler(filename) file_handler.setLevel(logging.DEBUG) formatter = logging.Formatter("%(asctime)s %(filename)s, %(lineno)d, %(funcName)s: %(message)s") file_handler.setFormatter(formatter) logger.addHandler(file_handler) # log to the console console_handler = logging.StreamHandler() level = logging.INFO console_handler.setLevel(level) logger.addHandler(console_handler) logging.debug('logging initialized') How can I close the current logging file and restart logging to a new file? Note: I don't want to use RotatingFileHandler, because I want full control over all the filenames and the moment of rotation.

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• Javascript pass reference by value

  - by Carlos R. Batista

  Im having this weird reference issue when im trying to get a JSON file through query: var themeData; $.getJSON("json/sample.js", function(data) { themeData = data.theme; console.log(themeData.sample[0].description); }); console.log(themeData.sample[0].description); The first console.log works, the second doesnt. Im guessing because "data" already expired by the time the script gets there and themeData is just a mere pointer to "data". Is there a ways I can make sure themeData gets a duplicate of "data" and not just a pointer to it?

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• Solving the SQL Server Multiple Cascade Path Issue with a Trigger

  This tip will look at how you can use triggers to replace the functionality you get from the ON DELETE CASCADE option of a foreign key constraint. Keep your database and application development in syncSQL Connect is a Visual Studio add-in that brings your databases into your solution. It then makes it easy to keep your database in sync, and commit to your existing source control system. Find out more.

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• Provisioning a New SQL Server Instance – Part Two

  So how should you install and configure SQL Server 2012 properly? Glenn Berry completes his two-part series by explaining the steps needed to complete the preparation and do the actual installation. Keep your database and application development in syncSQL Connect is a Visual Studio add-in that brings your databases into your solution. It then makes it easy to keep your database in sync, and commit to your existing source control system. Find out more.

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• Design The Way Search Engines Like To See

  Designing a website does not require creativity and imagination only, but also a pinch of experience. Many times web designers high on confidence and low in experience commit some mistakes, though un... [Author: Manish Rawat - Web Design and Development - June 06, 2010]

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• Android HTTP Connection

  - by Ubersoldat

  Can anybody tell my why this doesn't work in the Android emulator? From the browser I have access and the server is internal. All I can think of is that I'm missing some configuration on my app so it can access the network layer. try { InetAddress server = Inet4Address.getByName("thehost"); //Doesn't work either //or InetAddress server2 = Inet4Address.getByAddress(new String("192.168.1.30").getBytes()); if(server.isReachable(5000)){ Log.d(TAG, "Ping!"); } Socket clientsocket = new Socket(server, 8080); } catch (UnknownHostException e) { Log.e(TAG, "Server Not Found"); } catch (IOException e) { Log.e(TAG, "Couldn't open socket"); } Throws an UnknownHostException Thanks

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• How to read log4j output to a web page?

  - by Ran

  I have a web page, used for admin purposes, which runs a task (image fetching from a remote site). In order to be able to debug the task using the browser only, no ssh etc, I'd like to be able to read all log output from the executing thread and spit it out to the web page. The task boils down to: Changing log level for current thread at the beginning of the call and restore when the call is done. Reading all log output by current thread and storing it in a string. So in pseudocode my execute() method would look like this: (I'm using struts2) public String execute() throws Exception { turnLoggingLevelToDebugOnlyForThisThread() ... do stuff... restoreLoggingLevelForThisThread() String logs = readAllLogsByThisThread(); } Can this be done with log4j? I'm using tomcat, struts2, log4j and slf4j.

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• Python script run via cron does not execute occassionally

  - by gcorne

  I have a simple python script for fetching tweets and caching them to disk that is configured to run every two minutes via cron. */2 * * * * (date ; /usr/bin/python /path/get_tweets.py) >> /path/log/get_tweets.log 2>&1 The script runs successfully most of the time. However, every so often the script doesn't execute. In addition to other logging, I added a simple print statement above the meat of the script and nothing except the output from the initial date command makes it to the log. #!/usr/bin/python # Script for fetching tweets and then storing them as an HTML snippet for inclusion using SSI print "Starting get_tweets.py" Any ideas? The system is a VPS running Centos 5.3 with python 2.4.

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• Problem configuring application specific loggin glassfish v3

  - by Shane

  I am using java.util.logging in an EJB application running on glassfish v3. I can see the log messages in server.log but i don't seem to be able to configure the logging level in glassfish\domains\domain1\logging.properties. If I use: Logger logger = Logger.getLogger("com.foo"); To obtain the logger and log with: logger.info("message"); then I expect that if I set com.foo.level=WARNING in logging.properties then the message should not logged. Am I doing something wrong here?

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• facebook extended access token login

  - by Pota Onasys

  I have the following code: $facebook = new Facebook(array( 'appId' => ID, 'secret' => SECRET, 'cookie' => true)); $fb_uid = $facebook->getUser(); if($fb_uid) { // check if person with fb_uid as facebook id in database, // if so log them in. If not, register them. $fb_user = $facebook->api('/' . $fb_uid); I then get their email address using $fb_user['email'] and facebook_id and store in the database as a means to log them in the future Sometimes $fb_uid returns false even though the person is logged in using facebook ... I think it is because the access token expires. how can I change this code to incorporate the extended access token to log in the user to my site? offline access token is deprecated, so I need to use the extended access token.

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• How do i plot a vertical axis with variable intervals (Flex Charts or any other)

  - by satish

  How do i plot a vertical axis with variable intervals? on a Flex Chart. I want to plot a data set that has values from 0.1 to 800. When I use a standard Numerical Axis, I have to define a interval. I tried using Log-Axis, but I am not sure how to plot the point values. Looks like something in lines of semi-log axis would be better. A axis with initial values in Numerical, but later shifting gears to a Log-Axis. Any ideas or pointers to implement this in Flex?

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• SQL in the City - Boston 2012

  A free day of training in Boston on Oct 8, 2012. Come join Grant Fritchey, Steve Jones and more to talk about SQL Server and how you can work more efficiently. Keep your database and application development in syncSQL Connect is a Visual Studio add-in that brings your databases into your solution. It then makes it easy to keep your database in sync, and commit to your existing source control system. Find out more.

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• Backbone.js - Getting JSON back from url

  - by Brian

  While trying to learn Backbone.js, I've been trying to grab the content of a JSON file using the following code: (function($){ var MyModel = Backbone.Model.extend(); var MyCollection = Backbone.Collection.extend({ model : MyModel, url: '/backbone/data.json', parse: function(response) { console.log(response); return response; } }); var stuff = new MyCollection; console.log(stuff.fetch()); console.log(stuff.toJSON()); })(jQuery) 'stuff.fetch()' returns the entire object (with the data I'm after in responseText), 'stuff.toJSON' returns nothing ([]), but the console in the parse method is returning exactly what I want (the json object of my data). I feel like I'm missing something obvious here, but I just can't seem to figure it out why I can't get the right data out. Could someone point me in the right direction or show me what I'm doing wrong here? Am I using a model for the wrong thing?

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• How to duplicate INSERTS into a seperate table?

  - by Ash

  An iPhone application I have installed uses an SQLite database to log entries with basic INSERTS and DELETES being performed on it. However I wish to keep a permanent log of the INSERTS made to this table, so when an INSERT occurs, I want it to be written to another table also as to create a log. I don't have access to the application source code in order to modify the SQL statements made, I do have access to the SQLite database. Can I do this with triggers? If so can somebody provide a short example.

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• C++ conditional compilation

  - by Shaown

  I have the following code snippet #ifdef DO_LOG #define log(p) record(p) #else #define log(p) #endif void record(char *data){ ..... ..... } Now if I call log("hello world") in my code and DO_LOG isn't defined, will the line be compiled, in other words will it eat up the memory for the string "hello world"? P.S. There are a lot of record calls in the program and it is memory sensitive, so is there any other way to conditionally compile so that it only depends on the #define DO_LOG? Thanks in advance.

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• jQuery .width() and .height() strange behaviour

  - by Misha Moroshko

  Why in the following code .height() returns 95 rather than 100, while .width() returns 200 as expected ? HTML: <table><tr> <td id="my"></td> </tr></table> <div id="log"></div> CSS: #my { border: 5px solid red; } JS: $("#my").width(200).height(100); $("#log").append("Width = " + $("#my").width() + "<br />"); $("#log").append("Height = " + $("#my").height());

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• The 2012 SQLServerCentral/Exceptional DBA Awards Party at the PASS Summit

  The 2012 SQLServerCentral party at the PASS Summit is on and will once again include the awards ceremony for the Exceptional DBA of 2012. Get your tickets now. Keep your database and application development in syncSQL Connect is a Visual Studio add-in that brings your databases into your solution. It then makes it easy to keep your database in sync, and commit to your existing source control system. Find out more.

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• Why does $('#id') return true if id doesn't exist?

  - by David

  I always wondered why jQuery returns true if I'm trying to find elements by id selector that doesnt exist in the DOM structure. Like this: <div id="one">one</div> <script> console.log( !!$('#one') ) // prints true console.log( !!$('#two') ) // is also true! (empty jQuery object) console.log( !!document.getElementById('two') ) // prints false </script> I know I can use !!$('#two').length since length === 0 if the object is empty, but it seems logical to me that a selector would return the element if found, otherwise null (like the native document.getElementById does). F.ex, this logic can't be done in jQuery: var div = $('#two') || $('<div id="two"></div>'); Wouldnt it be more logical if the ID selector returned null if not found? anyone?

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• Seam log4j credential logs

  - by Marc

  In Seam, using log4, I would like to have my info, warn and error always logging the logged in user (if so) name to be logged with whatever the log message is. Being a consistant thing I do not want to have to grab the logged-in user name, and prefix the message. so I attempted to populate the log4j NDC to have it as a field of the log message. Pushing the user name on successful login: NDC.push(credentials.getUsername()); Which works, but the NDC is managed per thread, so once another thread processes a request from the same logged in user, the trace of this user name is lost. I was thinking that there should be a common pattern to accomplish this simple task which is attaching each log message to the logged user, using the NDC or not, to know exactly what user triggered what action. Anyone knows the appropriate way to accomplish this?

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• Logging NHibernate SQL queries

  - by GuestMVCAsync

  Is there a way to access the full SQL query, including the values, inside my code? I am able to log SQL queries using log4net: <logger name="NHibernate.SQL" additivity="false"> <level value="ALL"/> <appender-ref ref="NHibernateSQLFileLog"/> </logger> However, I would like to find a way to log SQL queries from the code also. This way I will log the specific SQL query that causes an exception in my try/catch statement. Right now I have to data-mine the SQLFileLog to find the query that caused the exception when an exception occurs and it is not efficient.

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• How to get server message correctly

  - by Leo

  Problem I send the message "12345" from the socket server to the client: myPrintWriter.println("12345"); After that I read this message on client: int c; while ((c = inputStream.read( )) != -1) { byte[] buffer2 = new byte[1]; buffer2[0] = (byte) c; String symbol = new String(buffer2 , "UTF-8"); String symbolCode = Integer.toString((int)buffer2[0]); Log.v(symbol, symbolCode); } Log.v("c == -1", "Disconnected"); What I see in log: With out.println("abcrefg"); Why? I think it's line termination symbol. I need to get string "12345" or any other and next strings correctly. Help me please.

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• How to recover from a fatal error "Allowed memory size exhausted"

  - by Matthieu

  Hi everybody, Do you know any solution to recover from the PHP fatal error : "Allowed memory size ... exhausted" I have a shutdown function that is called when a fatal error appear. This function create an ErrorException from it, and logs it. The problem is : when there is no more memory available, it can't log the error (I log in Firebug, via FirePHP, with Zend Framework). So what i mean by "how to recover from it", is how to perform basic error log, and let Zend Framework send the Headers, so that the error is logged (in Firebug in my case) as any other error ? Thanks

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• Why doesn’t ISNUMERIC work correctly? (SQL Spackle)

  Another in our series of articles to help you fill in the cracks in your knowledge with SQL Spackle. MVP Jeff Moden shows us how IsNumeric works and how you should use it. Keep your database and application development in syncSQL Connect is a Visual Studio add-in that brings your databases into your solution. It then makes it easy to keep your database in sync, and commit to your existing source control system. Find out more.

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