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• Eclipse organization: workspaces, working sets, projects, folders, multiple source folders, ....!!!

  - by Ricket

  There is quite a tier of organization in Eclipse. You can have multiple workspaces, each of which can have projects, these projects can be assigned to working sets, and then each project can have source folders... How do you use all this organization? Do you even use it all? Working sets are so hidden that I hardly know what they are; are they commonly used, or are they hidden because they are so uncommonly used? What is even the methodology behind all this? I'd like a good explanation of the recommended way to use all these different organizational layers, because at the moment I basically just have a bunch of random projects in a single workspace (the default %USER%/workspace folder) and it's getting to be quite an alphabetical mess. So in essence: How do you keep your Eclipse workspace(s) organized?

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• Can a conforming C# compiler optimize away a local (but unused) variable if it is the only strong re

  - by stakx

  The title says it all, but let me explain: void Case_1() { var weakRef = new WeakReference(new object()); GC.Collect(); // <-- doesn't have to be an explicit call; just assume that // garbage collection would occur at this point. if (weakRef.IsAlive) ... } In this code example, I obviously have to plan for the possibility that the new'ed object is reclaimed by the garbage collector; therefore the if statement. (Note that I'm using weakRef for the sole purpose of checking if the new'ed object is still around.) void Case_2() { var unusedLocalVar = new object(); var weakRef = new WeakReference(unusedLocalVar); GC.Collect(); // <-- doesn't have to be an explicit call; just assume that // garbage collection would occur at this point. Debug.Assert(weakReferenceToUseless.IsAlive); } The main change in this code example from the previous one is that the new'ed object is strongly referenced by a local variable (unusedLocalVar). However, this variable is never used again after the weak reference (weakRef) has been created. Question: Is a conforming C# compiler allowed to optimize the first two lines of Case_2 into those of Case_1 if it sees that unusedLocalVar is only used in one place, namely as an argument to the WeakReference constructor? i.e. is there any possibility that the assertion in Case_2 could ever fail?

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• Is it possible to have WAMP run httpd.exe as user [myself] instead of local SYSTEM?

  - by Olivier H

  Hello! I run a django application over apache with mod_wsgi, using WAMP. A certain URL allows me to stream the content of image files, the paths of which are stored in database. The files can be located whether on local machine or under network drive (\my\network\folder). With the development server (manage.py runserver), I have no trouble at all reading and streaming the files. With WAMP, and with network drive files, I get a IOError : obviously because the httpd instance does not have read permission on said drive. In the task manager, I see that httpd.exe is run by SYSTEM. I would like to tell WAMP to run the server as [myself] as I have read and write permissions on the shared folder. (eventually, the production server should be run by a 'www-admin' user having the permissions) Mapping the network shared folder on a drive letter (Z: for instance) does not solve this at all. The User/Group directives in httpd.conf do not seem to have any kind of influence on Apache's behaviour. I've also regedited : I tried to duplicate the HKLM[...]\wampapache registry key under HK_CURRENT_USER\ and rename the original key, but then the new key does not seem to be found when I cmd this > httpd.exe -n wampapache -k start or when I run WAMP. I've run out of ideas :) Has anybody ever had the same issue?

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• Stopping process in /etc/inittab kills spawned process. Doesn't happen in rc.local.

  - by Paul

  Hi, I'm trying to execute a firmware upgrade while my programming is running in inittab. My program will run 2 commands. One to extract the installer script from the tarball and the other to execute the installer script. In my code I'm using the system() function call. These are the 2 command strings below, system ( "tar zvxf tarball.tar.gz -C / installer.sh 2>&1" ); system( "nohup installer.sh tarball >/dev/null 2>&1 &" ); The installer script requires the tarball to be an argument. I've tried using sudo but i still have the same problem. I've tried nohup with no success. The installer script has to kill my program when doing the firmware upgrade but the installer script will stay alive. If my program is run from the command line or rc.local, on my target device, my upgrade works fine, i.e. when my program is killed my installer script continues. But I need to run my program from /etc/inittab so it can respawn if it dies. To stop my program in inittab the installer script will hash it out and execute "telinit q". This is where my program dies (but thats what I want it to do), but it also kills my installer script. Does anyone know why this is happening and what can I do to solve it? Thanks in advance.

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• Is it ethical to work as freelancer even if you are working in a software company as a full time dev

  - by Ram

  Is it ethical to work as freelancer even if you are working in a software company as a full time developer?

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• does a git repository have its own local value for core.autocrlf that overrides the global one?

  - by Warren P

  As per this question, I understand that core.autocrlf=true in git will cause CRLF to LF translations. However when I type : git config core.autocrlf I see: false However, when I stage modified files that are already in the repo, I still get these warnings: Warning: CRLF will be replaced by LF in File1.X. The file will have its original line endings in your working directory. My guess is that the repo copy of the file is already set to "autocrlf=true". Questions: A. How do I query whether a file or git repo is already forcing AutoCrlf? B. How do I turn it autocrlf off?

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• How much benefit do you get from working with other developers?

  - by SnOrfus

  For whatever reason I've only ever worked solo. The job that I have now, I was under the impression that I was being hired to work underneath a senior developer and that I'd be able to learn from them/their code. This was actually one of the conditions that I had when I accepted the position (that and I was broke and needed the cash - so I would have likely taken it anyway). As it turns out, the intention of management was for me to replace that senior developer because they were contracted and relatively expensive. The question I have is, though I've learned a lot in the 2 short years I've been here, am I potentially seriously stunting my learning/progress working solo instead of working at a company with other developers?

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• why click on the button is not working on IE?

  - by Cristian Boariu

  Hi guys, I'm just preparing the release of a library site builded in asp.net: http://213.133.103.5/gramma_prod/Site/Index.aspx All it's working great on FF and Chrome but on IE the asp button click event is not working. Please notice the most important buttons: "Adauga in cos" (Add to basket)... I'm just struggling to find out the problem... I've checked the forms to not have nested ones but they seems ok. Could you provide any other ideea? ps: I did not post any code because this problem occurs on all pages... Thanks in advance. Edit: Code for "Add to basket"(Adauga in cos) button from the index: <asp:ImageButton ID="imgBtnCosBooksFeatured" runat="server" OnCommand="addProductToBasket_Click" CommandName="Click" CommandArgument='<%# Eval("Carti_id").ToString()+","+Eval("Titlu").ToString()+","+Eval("Autor").ToString()%>' ImageUrl="../Site/images/featured-cos.jpg" ToolTip="Adauga in cos" /> works ok on ff and chrome. Fails on IE :(

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• Could git do not store history of specific folders when working with git-svn?

  - by Timofey Basanov

  In short: Is there a way to disable storing full history for specific folders in git-svn repo? We have pretty large SVN repo with big checkout. I would like to migrate it to Git for my local development, because Git speeds up update and status commands orders of magnitude. When I simply do git svn clone it creates very big repo. Big enough to be bigger then my whole HDD. The problem lies in binary directories for which history is too large. Latest binaries are required for proper local build, but history is not required at all for my development process. I will never change them myself. I would like to store only latest versions for specific folders, or may be a history, but for no more than a week. I could only found filter for git svn fetch, which excludes specific folders at all. This is not exactly what I need. It's OK with me to have Cron task which deletes history from specific folders, but I do not know how to make one. Also Cron does not solve problem of first git svn clone. P.S. SVN repository structure could not be changed by any means.

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• How to limit memory of a OS X program? ulimit -v neither -m are working

  - by hectorpal

  My programs run out of memory like half of the time I run them. Under Linux I can set a hard limit to the available memory using ulimit -v mem-in-kbytes. Actually, I use ulimit -S -v mem-in-kbytes, so I get a proper memory allocation problem in the program and I can abort. But... ulimit is not working in OSX 10.6. I've tried with -s and -m options, and they are not working. In 2008 there was some discussion about the same issue in MacRumors, but nobody proposed a good alternative. The should be a way a program can learn it's spending too much memory, or setting a limit through the OS.

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• Which repository access method is used to create a new “working copy”, file:/// or svn:// in same m

  - by Banani

  Hi!, I have setup svnserve server (1.6.5,plain, without apache) on Fedora. The users, who has accounts in same machine want to checkout a working copy. I have read svnbook and other sites and found file:/// access method is being used to checkout as svn checkout file:///var/svn/repos/myproject/trunk myproject ( ref:svnbook) I am little confused! As svnbook also says "Clients contact an svnserve server by using URLs that begin with the svn://" So, my question is, which method user will use to create their working copy? Thankyou. Banani

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• Is there a way to sync (two way) tables betwen a mysql server and a local MS Access?

  - by Kailen

  Help me figure out a solution to a (not so unique) problem. My research group has gps devices attached to migratory animals. Every once in a while, a research tech will be within range of an animal and will get the chance to download all the logged points. Each individual spits out a single dbf and new locations are just appended to the end (so the file is just cumulative). These data need to be shared among a research group. Everyone else (besides me) wants to use access, so they can make small edits and prefer that interface. They do not like using MySQL. The solution I came up with is: a) The person who downloads the file goes to a web page, enters animal ID into a form, chooses .dbf file and uploads to a mysql database on the server (I still have to write php code to read the dbf and write sql insert statements from it). b) Everyone syncs from their local access database to the server. (This is natively possible from access but very clunky). Is there a tool (preferably open source), that can compare a access table to mysql table and sync the two (both ways)? Alternatively, does anyone have a more elegant solution? The ultimate goal is to allow everyone to have access to the most current data on their computers using their preferred database app.

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• Why are scripts given .phtml extension while working with zend framework?

  - by q234e

  Why are scripts given .phtml extension while working with zend framework?

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• Disable error_log. Error_log flooding

  - by user36646

  Hello, i got an webserver running and old version of gambio (xt:commerce fork). The error_log in the dir over the public_html is flooding with errors. About 30mb in 15min. How can I disable this log? I can't fix all the errors. Here are a few examples of the errors: [warn] mod_fcgid: stderr: PHP Notice: Undefined variable: key in /usr/www/users/foo//includes/classes/class.inputfilter.php on line 98 [warn] mod_fcgid: stderr: PHP Notice: Undefined index: in /usr/www/users/foo/templ [warn] mod_fcgid: stderr: in /usr/www/users/foo/templates/gambio/source/inc/xtc_show_category_sectionc.inc.php on line 47 They are all errors of: "mod_fcgid: stderr". I tried to grep "error_log" and "error_report" in the public html dir, but i did not find anything. Here is a part from the phpinfo(): PHP Version 4.4.9 System Linux foobar.com 2.6.26-2-686-bigmem #1 SMP Sat Dec 26 09:26:36 UTC 2009 i686 Build Date Feb 11 2010 13:00:33 Configure Command './configure' '--prefix=/usr/local/php4' '--with-config-file-path=/etc/php4/cgi' '--with-gd' '--with-jpeg-dir' '--with-png-dir' '--with-tiff-dir' '--with-ttf' '--enable-force-cgi-redirect' '--enable-safe-mode' '--with-zlib' '--enable-ftp' '--enable-url-includes' '--enable-gd-native-ttf' '--enable-trans-sid' '--enable-dbase' '--with-db4' '--with-ldap' '--enable-bcmath' '--enable-calendar' '--enable-memory-limit' '--with-mcal=/usr' '--with-bz2' '--with-mod-dav' '--enable-sockets' '--with-kerberos' '--with-imap-ssl' '--enable-gd-imgstrttf' '--with-freetype-dir' '--with-curl' '--with-mysql' '--with-mhash' '--with-gdbm' '--with-pgsql' '--with-gettext' '--with-xml' '--with-mcrypt' '--with-openssl' '--with-dom' '--without-pear' '--enable-exif' '--with-zip' '--enable-wddx' '--disable-cli' '--enable-fastcgi' '--with-imap' '--enable-xslt' '--with-xslt-sablot=/usr/local/lib' '--enable-mbstring' '--with-dom-xslt' '--with-dom-exslt' Server API CGI/FastCGI Virtual Directory Support disabled Configuration File (php.ini) Path /home/httpd/php-ini/foo/php.ini PHP API 20020918 PHP Extension 20020429 Zend Extension 20050606 Debug Build no Zend Memory Manager enabled Thread Safety disabled Registered PHP Streams php, http, ftp, https, ftps, compress.bzip2, compress.zlib **Configuration PHP Core** Directive Local Value Master Value allow_call_time_pass_reference On On allow_url_fopen Off Off always_populate_raw_post_data Off Off arg_separator.input & & arg_separator.output & & asp_tags Off Off auto_append_file no value no value auto_prepend_file no value no value browscap no value no value default_charset no value no value default_mimetype text/html text/html define_syslog_variables Off Off disable_classes no value no value disable_functions no value no value display_errors On On display_startup_errors Off Off doc_root no value no value docref_ext no value no value docref_root no value no value enable_dl On On error_append_string no value no value error_log no value no value error_prepend_string no value no value error_reporting 2039 2039 expose_php On On extension_dir /usr/local/php4/lib/php/extensions/no-debug-non-zts-20020429 /usr/local/php4/lib/php/extensions/no-debug-non-zts-20020429 file_uploads On On gpc_order GPC GPC highlight.bg #FFFFFF #FFFFFF highlight.comment #FF8000 #FF8000 highlight.default #0000BB #0000BB highlight.html #000000 #000000 highlight.keyword #007700 #007700 highlight.string #DD0000 #DD0000 html_errors On On ignore_repeated_errors Off Off ignore_repeated_source Off Off ignore_user_abort Off Off implicit_flush Off Off include_path .:/usr/local/lib/php/ .:/usr/local/lib/php/ log_errors Off Off log_errors_max_len 1024 1024 magic_quotes_gpc On On magic_quotes_runtime Off Off magic_quotes_sybase Off Off max_execution_time 120 120 max_input_nesting_level 500 500 max_input_time -1 -1 memory_limit 128000000 128000000 open_basedir /usr/www/users/foo:/usr/home/foo:/tmp:/usr/local/lib/php:/usr/local/rmagic:/usr/www/users/he/_system_ /usr/www/users/foo:/usr/home/foo:/tmp:/usr/local/lib/php:/usr/local/rmagic:/usr/www/users/he/_system_ output_buffering no value no value output_handler no value no value post_max_size 128000000 128000000 precision 14 14 register_argc_argv On On register_globals Off Off report_memleaks On On safe_mode Off Off safe_mode_exec_dir no value no value safe_mode_gid Off Off safe_mode_include_dir no value no value sendmail_from no value no value sendmail_path /usr/sbin/sendmail -t /usr/sbin/sendmail -t serialize_precision 100 100 short_open_tag On On SMTP localhost localhost smtp_port 25 25 sql.safe_mode Off Off track_errors Off Off unserialize_callback_func no value no value upload_max_filesize 128000000 128000000 upload_tmp_dir /usr/foo/foo/.tmp /usr/foo/.tmp user_dir no value no value variables_order EGPCS EGPCS xmlrpc_error_number 0 0 xmlrpc_errors Off Off y2k_compliance Off Off

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• While installing updates I get "Package operation Failed" for ubuntu 12.04

  - by user54395

  i get the following response in the details:- Please help nstallArchives() failed: perl: warning: Setting locale failed. perl: warning: Please check that your locale settings: LANGUAGE = (unset), LC_ALL = (unset), LANG = "en_IN.ISO8859-1" are supported and installed on your system. perl: warning: Falling back to the standard locale ("C"). locale: Cannot set LC_CTYPE to default locale: No such file or directory locale: Cannot set LC_MESSAGES to default locale: No such file or directory locale: Cannot set LC_ALL to default locale: No such file or directory perl: warning: Setting locale failed. perl: warning: Please check that your locale settings: LANGUAGE = (unset), LC_ALL = (unset), LANG = "en_IN.ISO8859-1" are supported and installed on your system. perl: warning: Falling back to the standard locale ("C"). locale: Cannot set LC_CTYPE to default locale: No such file or directory locale: Cannot set LC_MESSAGES to default locale: No such file or directory locale: Cannot set LC_ALL to default locale: No such file or directory perl: warning: Setting locale failed. perl: warning: Please check that your locale settings: LANGUAGE = (unset), LC_ALL = (unset), LANG = "en_IN.ISO8859-1" are supported and installed on your system. perl: warning: Falling back to the standard locale ("C"). locale: Cannot set LC_CTYPE to default locale: No such file or directory locale: Cannot set LC_MESSAGES to default locale: No such file or directory locale: Cannot set LC_ALL to default locale: No such file or directory perl: warning: Setting locale failed. perl: warning: Please check that your locale settings: LANGUAGE = (unset), LC_ALL = (unset), LANG = "en_IN.ISO8859-1" are supported and installed on your system. perl: warning: Falling back to the standard locale ("C"). locale: Cannot set LC_CTYPE to default locale: No such file or directory locale: Cannot set LC_MESSAGES to default locale: No such file or directory locale: Cannot set LC_ALL to default locale: No such file or directory (Reading database ... (Reading database ... 5%% (Reading database ... 10%% (Reading database ... 15%% (Reading database ... 20%% (Reading database ... 25%% (Reading database ... 30%% (Reading database ... 35%% (Reading database ... 40%% (Reading database ... 45%% (Reading database ... 50%% (Reading database ... 55%% (Reading database ... 60%% (Reading database ... 65%% (Reading database ... 70%% (Reading database ... 75%% (Reading database ... 80%% (Reading database ... 85%% (Reading database ... 90%% (Reading database ... 95%% (Reading database ... 100%% (Reading database ... 427340 files and directories currently installed.) Preparing to replace thunderbird-trunk-globalmenu 14.0~a1~hg20120409r9862.91177-0ubuntu1~umd1 (using .../thunderbird-trunk-globalmenu_14.0~a1~hg20120409r9866.91235-0ubuntu1~umd1_i386.deb) ... Unpacking replacement thunderbird-trunk-globalmenu ... Preparing to replace thunderbird-trunk 14.0~a1~hg20120409r9862.91177-0ubuntu1~umd1 (using .../thunderbird-trunk_14.0~a1~hg20120409r9866.91235-0ubuntu1~umd1_i386.deb) ... Unpacking replacement thunderbird-trunk ... Processing triggers for man-db ... locale: Cannot set LC_CTYPE to default locale: No such file or directory locale: Cannot set LC_MESSAGES to default locale: No such file or directory locale: Cannot set LC_ALL to default locale: No such file or directory Processing triggers for bamfdaemon ... Rebuilding /usr/share/applications/bamf.index... Processing triggers for gnome-menus ... Processing triggers for desktop-file-utils ... Setting up crossplatformui (1.0.27) ... Rather than invoking init scripts through /etc/init.d, use the service(8) utility, e.g. service acpid restart Since the script you are attempting to invoke has been converted to an Upstart job, you may also use the stop(8) and then start(8) utilities, e.g. stop acpid ; start acpid. The restart(8) utility is also available. acpid stop/waiting acpid start/running, process 5286 package libqtgui4 exist QT_VERSION = 4 make -C /lib/modules/3.2.0-22-generic/build M=/usr/local/bin/ztemtApp/zteusbserial/below2.6.27 modules make[1]: Entering directory /usr/src/linux-headers-3.2.0-22-generic' CC [M] /usr/local/bin/ztemtApp/zteusbserial/below2.6.27/usb-serial.o /usr/local/bin/ztemtApp/zteusbserial/below2.6.27/usb-serial.c:34:28: fatal error: linux/smp_lock.h: No such file or directory compilation terminated. make[2]: *** [/usr/local/bin/ztemtApp/zteusbserial/below2.6.27/usb-serial.o] Error 1 make[1]: *** [_module_/usr/local/bin/ztemtApp/zteusbserial/below2.6.27] Error 2 make[1]: Leaving directory/usr/src/linux-headers-3.2.0-22-generic' make: * [modules] Error 2 dpkg: error processing crossplatformui (--configure): subprocess installed post-installation script returned error exit status 2 No apport report written because MaxReports is reached already Setting up thunderbird-trunk (14.0~a1~hg20120409r9866.91235-0ubuntu1~umd1) ... Setting up thunderbird-trunk-globalmenu (14.0~a1~hg20120409r9866.91235-0ubuntu1~umd1) ... Errors were encountered while processing: crossplatformui Error in function: SystemError: E:Sub-process /usr/bin/dpkg returned an error code (1) Setting up crossplatformui (1.0.27) ... Rather than invoking init scripts through /etc/init.d, use the service(8) utility, e.g. service acpid restart Since the script you are attempting to invoke has been converted to an Upstart job, you may also use the stop(8) and then start(8) utilities, e.g. stop acpid ; start acpid. The restart(8) utility is also available. acpid stop/waiting acpid start/running, process 5541 package libqtgui4 exist QT_VERSION = 4 make -C /lib/modules/3.2.0-22-generic/build M=/usr/local/bin/ztemtApp/zteusbserial/below2.6.27 modules make[1]: Entering directory /usr/src/linux-headers-3.2.0-22-generic' CC [M] /usr/local/bin/ztemtApp/zteusbserial/below2.6.27/usb-serial.o /usr/local/bin/ztemtApp/zteusbserial/below2.6.27/usb-serial.c:34:28: fatal error: linux/smp_lock.h: No such file or directory compilation terminated. make[2]: *** [/usr/local/bin/ztemtApp/zteusbserial/below2.6.27/usb-serial.o] Error 1 make[1]: *** [_module_/usr/local/bin/ztemtApp/zteusbserial/below2.6.27] Error 2 make[1]: Leaving directory/usr/src/linux-headers-3.2.0-22-generic' make: * [modules] Error 2 dpkg: error processing crossplatformui (--configure): subprocess installed post-installation script returned error exit status 2

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• Why doesn't Wolfram Workbench work on 64-bit Ubuntu?

  - by Ian Hincks

  I have downloaded the shell script (Workbench_2.0.0_LINUX.sh), I have run it as root with it giving no complaints, relevant looking files have appeared in /usr/local/Wolfram/WolframWorkbench/2.0/ and it has created the executable "WolframWorkbench" in /usr/local/bin. However, when I run WolframWorkbench from terminal it spits out /usr/local/bin/WolframWorkbench: 46: exec: /usr/local/Wolfram/WolframWorkbench/2.0/WolframWorkbench: not found That file does indeed exist, and is executable. I have also tried running it directly, and I have also tried running the /usr/local/Wolfram/WolframWorkbench/2.0/Executables/WolframWorkbench too. Is there something I'm missing? (I am running Ubuntu 12.04 64bit with openjdk7)

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• DNS settings for resolving Host name to IP not working?

  - by Hasas Ali Khan

  I want to access my IIS hosted application over LAN. First I installed a DNS server. The DNS configuration steps are: Go to DNS Manager - right click on System Name - click on configure a DNS Server. DNS Server wizard open -, click on next button - Select radio button "forward lookup zone" click on next button. In the second window. click on radio button "The server maintains the zone" and then click next. Give the zone name "example.com" Click on radio button, "Do Not allow dynamic updates". and then click next button. In the next window, click on radio button "No it should not forward query" and then click next button. Complete the configure a DNS server wizard and then click on finish button. After it is managing the DNS records: In DNS server wizard. open tree of forward lookup zone and right click on the new zone name "example.com" - properties and click on "Start of authority" and write values on text boxes serial number=1 primary server=systemname.domainname responsible person=hostmaster.domainname Click on server name, highlight domain name, click on edit button and enter IP address of the server where I host my application. Highlight new zone name and right click on it and click "New Host" option. In this window there are three text boxes: Name(user parent name if blank)=scoring Fully Qualified Domain Name=scoring.example.com IP Address= My IP Address and check on "Create associated pointer(PTR) record" and click on "Add Host" Host button and then click done button. I have host header for my application is "scoring" on port 80 and its working fine on server my application setting are I have change its, Advance setting --> Application Pool Identity --> Local System application can access on server with host name "scoring" but it can not access on machines on LAN. When I change LAN machine host file that is under, C:/windows/system32/driver/etc/host and edit it and enter host name with hosted machine IP like this: scoring 192.168.1.20 By making these changes I can run the application over LAN machines as I mentioned above DNS setting by which I can run App over LAN with out editing the client's host file. What mistake am I doing in this configuration?

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• How to get an inactive RAID device working again?

  - by Jonik

  After booting, my RAID1 device (/dev/md_d0 *) sometimes goes in some funny state and I cannot mount it. * Originally I created /dev/md0 but it has somehow changed itself into /dev/md_d0. # mount /opt mount: wrong fs type, bad option, bad superblock on /dev/md_d0, missing codepage or helper program, or other error (could this be the IDE device where you in fact use ide-scsi so that sr0 or sda or so is needed?) In some cases useful info is found in syslog - try dmesg | tail or so The RAID device appears to be inactive somehow: # cat /proc/mdstat Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] md_d0 : inactive sda4[0](S) 241095104 blocks # mdadm --detail /dev/md_d0 mdadm: md device /dev/md_d0 does not appear to be active. Question is, how to make the device active again (using mdmadm, I presume)? (Other times it's alright (active) after boot, and I can mount it manually without problems. But it still won't mount automatically even though I have it in /etc/fstab: /dev/md_d0 /opt ext4 defaults 0 0 So a bonus question: what should I do to make the RAID device automatically mount at /opt at boot time?) This is an Ubuntu 9.10 workstation. Background info about my RAID setup in this question. Edit: My /etc/mdadm/mdadm.conf looks like this. I've never touched this file, at least by hand. # by default, scan all partitions (/proc/partitions) for MD superblocks. # alternatively, specify devices to scan, using wildcards if desired. DEVICE partitions # auto-create devices with Debian standard permissions CREATE owner=root group=disk mode=0660 auto=yes # automatically tag new arrays as belonging to the local system HOMEHOST <system> # instruct the monitoring daemon where to send mail alerts MAILADDR <my mail address> # definitions of existing MD arrays # This file was auto-generated on Wed, 27 Jan 2010 17:14:36 +0200 In /proc/partitions the last entry is md_d0 at least now, after reboot, when the device happens to be active again. (I'm not sure if it would be the same when it's inactive.) Resolution: as Jimmy Hedman suggested, I took the output of mdadm --examine --scan: ARRAY /dev/md0 level=raid1 num-devices=2 UUID=de8fbd92[...] and added it in /etc/mdadm/mdadm.conf, which seems to have fixed the main problem. After changing /etc/fstab to use /dev/md0 again (instead of /dev/md_d0), the RAID device also gets automatically mounted!

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• How do I allow mysqld to use more than 24.9% of my cpu?

  - by Joseph Yancey

  I have a Web server running on RHEL that is running Apache and MySQL. It has a Quad core 3.2Ghz Xeon CPU and 8 Gigs of RAM Most of the time, we don't have any issues at all. Our web application is very database intensive. When our usage gets pretty heavy MySQL will peg out at using 24.9% of the cpu. Most of the time, it hangs around below 5%. I have speculated that it is only using one core of the CPU and it is pegging out that core but TOP shows me in the cpu column that mysqld changes cores even while the usage stays at 24.9%. When it does this MySQL gets painfully slow as it is queuing up queries Is there some magic configuration that will tell mysql to use more cpu when it needs to? Also, any other advice on my configuration would be helpful. We run two applications on this server. One that runs Innodb but doesn't get much usage (it has been replaced by the other app), and one that runs MyIsam and gets lots of use. Overall, our whole mysql data directory is something like 13Gigs if that matters at all. Here is my config: [root@ProductionLinux root]# cat /etc/my.cnf [mysqld] server-id = 71 log-bin = /var/log/mysql/mysql-bin.log binlog-do-db = oldapplication binlog-do-db = newapplication binlog-do-db = support thread_cache_size = 30 key_buffer_size = 256M table_cache = 256 sort_buffer_size = 4M read_buffer_size = 1M skip-name-resolve innodb_data_home_dir = /usr/local/mysql/data/ innodb_data_file_path = InnoDB:100M:autoextend set-variable = innodb_buffer_pool_size=70M set-variable = innodb_additional_mem_pool_size=10M set-variable = max_connections=500 innodb_log_group_home_dir = /usr/local/mysql/data innodb_log_arch_dir = /usr/local/mysql/data set-variable = innodb_log_file_size=20M set-variable = innodb_log_buffer_size=8M innodb_flush_log_at_trx_commit = 1 log-queries-not-using-indexes log-error = /var/log/mysql/mysql-error.log mysql show variables; +---------------------------------+-----------------------------------------------------------------------------+ | Variable_name | Value | +---------------------------------+-----------------------------------------------------------------------------+ | auto_increment_increment | 1 | | auto_increment_offset | 1 | | automatic_sp_privileges | ON | | back_log | 50 | | basedir | /usr/local/mysql-standard-5.0.18-linux-x86_64-glibc23/ | | binlog_cache_size | 32768 | | bulk_insert_buffer_size | 8388608 | | character_set_client | latin1 | | character_set_connection | latin1 | | character_set_database | latin1 | | character_set_results | latin1 | | character_set_server | latin1 | | character_set_system | utf8 | | character_sets_dir | /usr/local/mysql-standard-5.0.18-linux-x86_64-glibc23/share/mysql/charsets/ | | collation_connection | latin1_swedish_ci | | collation_database | latin1_swedish_ci | | collation_server | latin1_swedish_ci | | completion_type | 0 | | concurrent_insert | 1 | | connect_timeout | 5 | | datadir | /usr/local/mysql/data/ | | date_format | %Y-%m-%d | | datetime_format | %Y-%m-%d %H:%i:%s | | default_week_format | 0 | | delay_key_write | ON | | delayed_insert_limit | 100 | | delayed_insert_timeout | 300 | | delayed_queue_size | 1000 | | div_precision_increment | 4 | | engine_condition_pushdown | OFF | | expire_logs_days | 0 | | flush | OFF | | flush_time | 0 | | | ft_max_word_len | 84 | | ft_min_word_len | 4 | | ft_query_expansion_limit | 20 | | ft_stopword_file | (built-in) | | group_concat_max_len | 1024 | | have_archive | YES | | have_bdb | NO | | have_blackhole_engine | NO | | have_compress | YES | | have_crypt | YES | | have_csv | NO | | have_example_engine | NO | | have_federated_engine | NO | | have_geometry | YES | | have_innodb | YES | | have_isam | NO | | have_ndbcluster | NO | | have_openssl | NO | | have_query_cache | YES | | have_raid | NO | | have_rtree_keys | YES | | have_symlink | YES | | init_connect | | | init_file | | | init_slave | | | innodb_additional_mem_pool_size | 10485760 | | innodb_autoextend_increment | 8 | | innodb_buffer_pool_awe_mem_mb | 0 | | innodb_buffer_pool_size | 73400320 | | innodb_checksums | ON | | innodb_commit_concurrency | 0 | | innodb_concurrency_tickets | 500 | | innodb_data_file_path | InnoDB:100M:autoextend | | innodb_data_home_dir | /usr/local/mysql/data/ | | innodb_doublewrite | ON | | innodb_fast_shutdown | 1 | | innodb_file_io_threads | 4 | | innodb_file_per_table | OFF | | innodb_flush_log_at_trx_commit | 1 | | innodb_flush_method | | | innodb_force_recovery | 0 | | innodb_lock_wait_timeout | 50 | | innodb_locks_unsafe_for_binlog | OFF | | innodb_log_arch_dir | /usr/local/mysql/data | | innodb_log_archive | OFF | | innodb_log_buffer_size | 8388608 | | innodb_log_file_size | 20971520 | | innodb_log_files_in_group | 2 | | innodb_log_group_home_dir | /usr/local/mysql/data | | innodb_max_dirty_pages_pct | 90 | | innodb_max_purge_lag | 0 | | innodb_mirrored_log_groups | 1 | | innodb_open_files | 300 | | innodb_support_xa | ON | | innodb_sync_spin_loops | 20 | | innodb_table_locks | ON | | innodb_thread_concurrency | 20 | | innodb_thread_sleep_delay | 10000 | | interactive_timeout | 28800 | | join_buffer_size | 131072 | | key_buffer_size | 268435456 | | key_cache_age_threshold | 300 | | key_cache_block_size | 1024 | | key_cache_division_limit | 100 | | language | /usr/local/mysql-standard-5.0.18-linux-x86_64-glibc23/share/mysql/english/ | | large_files_support | ON | | large_page_size | 0 | | large_pages | OFF | | license | GPL | | local_infile | ON | | locked_in_memory | OFF | | log | OFF | | log_bin | ON | | log_bin_trust_function_creators | OFF | | log_error | /var/log/mysql/mysql-error.log | | log_slave_updates | OFF | | log_slow_queries | OFF | | log_warnings | 1 | | long_query_time | 10 | | low_priority_updates | OFF | | lower_case_file_system | OFF | | lower_case_table_names | 0 | | max_allowed_packet | 1048576 | | max_binlog_cache_size | 18446744073709551615 | | max_binlog_size | 1073741824 | | max_connect_errors | 10 | | max_connections | 500 | | max_delayed_threads | 20 | | max_error_count | 64 | | max_heap_table_size | 16777216 | | max_insert_delayed_threads | 20 | | max_join_size | 18446744073709551615 | | max_length_for_sort_data | 1024 | | max_relay_log_size | 0 | | max_seeks_for_key | 18446744073709551615 | | max_sort_length | 1024 | | max_sp_recursion_depth | 0 | | max_tmp_tables | 32 | | max_user_connections | 0 | | max_write_lock_count | 18446744073709551615 | | multi_range_count | 256 | | myisam_data_pointer_size | 6 | | myisam_max_sort_file_size | 9223372036854775807 | | myisam_recover_options | OFF | | myisam_repair_threads | 1 | | myisam_sort_buffer_size | 8388608 | | myisam_stats_method | nulls_unequal | | net_buffer_length | 16384 | | net_read_timeout | 30 | | net_retry_count | 10 | | net_write_timeout | 60 | | new | OFF | | old_passwords | OFF | | open_files_limit | 2510 | | optimizer_prune_level | 1 | | optimizer_search_depth | 62 | | pid_file | /usr/local/mysql/data/ProductionLinux.pid | | port | 3306 | | preload_buffer_size | 32768 | | protocol_version | 10 | | query_alloc_block_size | 8192 | | query_cache_limit | 1048576 | | query_cache_min_res_unit | 4096 | | query_cache_size | 0 | | query_cache_type | ON | | query_cache_wlock_invalidate | OFF | | query_prealloc_size | 8192 | | range_alloc_block_size | 2048 | | read_buffer_size | 1044480 | | read_only | OFF | | read_rnd_buffer_size | 262144 | | relay_log_purge | ON | | relay_log_space_limit | 0 | | rpl_recovery_rank | 0 | | secure_auth | OFF | | server_id | 71 | | skip_external_locking | ON | | skip_networking | OFF | | skip_show_database | OFF | | slave_compressed_protocol | OFF | | slave_load_tmpdir | /tmp/ | | slave_net_timeout | 3600 | | slave_skip_errors | OFF | | slave_transaction_retries | 10 | | slow_launch_time | 2 | | socket | /tmp/mysql.sock | | sort_buffer_size | 4194296 | | sql_mode | | | sql_notes | ON | | sql_warnings | ON | | storage_engine | MyISAM | | sync_binlog | 0 | | sync_frm | ON | | sync_replication | 0 | | sync_replication_slave_id | 0 | | sync_replication_timeout | 10 | | system_time_zone | CST | | table_cache | 256 | | table_lock_wait_timeout | 50 | | table_type | MyISAM | | thread_cache_size | 30 | | thread_stack | 262144 | | time_format | %H:%i:%s | | time_zone | SYSTEM | | timed_mutexes | OFF | | tmp_table_size | 33554432 | | tmpdir | | | transaction_alloc_block_size | 8192 | | transaction_prealloc_size | 4096 | | tx_isolation | REPEATABLE-READ | | updatable_views_with_limit | YES | | version | 5.0.18-standard-log | | version_comment | MySQL Community Edition - Standard (GPL) | | version_compile_machine | x86_64 | | version_compile_os | unknown-linux-gnu | | wait_timeout | 28800 | +---------------------------------+-----------------------------------------------------------------------------+ 210 rows in set (0.00 sec)

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• NGINX rewrite rules help. Redirect not working and want to get rid of index.php in urls

  - by Tamerax

  hey! I have 2 questions for nginx users. 1) I'm trying to setup my joomla server onto my new linode running NGINX and after much (like days) of searching and testing, I finally have a config that works with with SEF url plugins...sorta. I was using an apache system on the old server and it used mod_rewrite and life was fine in terms of SEF. Since NGINX doesn't have mod_rewrite, I found something that works BUT it constantly leaves index.php in the urls. ex: http://mysite.com/index.php/forum i want it to be just http://mysite.com/forum but without mod_rewrite it doesn't seem to be possible in joomla that i'm aware of. I know in wordpress it IS possible but I have to use a plugin. Here is my config file: server { listen 80; server_name mysite.com www.mysite.com; access_log /home/public_html/mysite.com/log/access.log; error_log /home/public_html/mysite.com/log/error.log; root /home/public_html/mysite.com/public/; large_client_header_buffers 4 8k; # prevent some 400 errors index index.php index.html; fastcgi_index index.php; location / { expires 30d; error_page 404 = @joomla; log_not_found off; } # Rewrite location @joomla { rewrite ^(.*)$ /index.php?q=last; } # Static Files location ~* ^.+.(jpg|jpeg|gif|css|png|js|ico)$ { access_log off; expires 30d; } # PHP location ~ \.php { keepalive_timeout 0; fastcgi_pass 127.0.0.1:9000; fastcgi_index index.php; include /usr/local/nginx/conf/fastcgi_params; fastcgi_param SCRIPT_FILENAME /home/public_html/mysite.com/public /$fastcgi_script_name; } } 2) second question should be easy but i can't get it to work. I want to use the same config I posted above and have either mysite.com or www.mysite.com both forward to mysite.com/portal. Basically when you hit up the front page with or without the www, it all gets forwarded to a sub directory on the server I called Portal. I have tried several variations of: rewrite ^/(.*) http://www.example.com/portal/$1 permanent; but it usually ends with firefox telling me there is some crazy loop happening the address bar saying something like mysite.com/portalportalportalportalportal.........on and on. So, any help on either of these issues would be awesome!! Thanks!!

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• pascal triangle in php (anything wrong with this solution?) [migrated]

  - by zhenka

  I saw that one of the interview questions could be building a pascal triangle. Is there anything wrong with this particular solution I came up with? function pascal_r($r){ $local = array(); if($r == 1){ return array(array(1)); } else { $previous = pascal_r($r - 1); array_push($local, 1); for($i = 0; $i < $r - 2 && $r > 2; $i++){ array_push($local, $previous[$r-2][$i] + $previous[$r-2][$i + 1]); } array_push($local, 1); } array_push($previous, $local); return $previous; } print_r(pascal_r(100));

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• RouterOS on Hyper-V (v3/2012) - any way to get it working?

  - by TomTom

  Trying to set up a small VPN point to connect into a remote Hyper-V cluster using ROuterOS. Anyone got it working ON Hyper-V with the latest builds of RouterOS? It seems the legacy network adapter is not supported anymore either (or just broken). The platform is a Windows Server 2012 RC. This is not a high performance setup - the RouterOS wont do the routing for more than the backend administrative access, and the only real traffic we will see there is when ISO images for new operating systems are uploaded. Otherwise we will have possibly RDP traffic as well as web / http traffioc, but this is internal only (dashboards, some control panel). The server has no public business. So the price for non virtualized network cards is ok for me. After hooking up - ping just does not work. After some time I see in windows (arp -a on the command line), so I know that the Hyper-V side is set up properly. Just no packets arrived. I have turned off all protection on Hyper-V (or : not turned them on), so no MAC spoofing protection etc. in the Advanced page for the legacy adapters. Unless I can get it work I will have to resort to using a windows install as router / VPN endpoint, which introduces another OS into the fabric (we run all routers etc. so far on mikrotik in hardware, which is why I want this one to be RouterOS, too). And no, putting hardware there is NOT an option - the cost would be significant.

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• keyboard intermittently stops working even after reinstalling windows 7; possibly a Chrome issue?

  - by neverskipbreakfast

  My keyboard intermittently stops working. Sometimes a couple of keys will work, but usually none. Sometimes if I mash the ctrl+alt+windows keys randomly for a bit, the keyboard will let me type one more letter before stopping again. Sometimes the keys will open a program menu but usually not. I have even completely wiped my machine and reinstalled windows 7; the problem continues. Specs: Intel iMac (early 2006, 2.0GHz, 2MB RAM, 240GB HD) running ONLY Windows 7 Professional, 32-bit (NOT through boot camp) and using a USB keyboard (Saitek Eclipse II.) Unplugging & reconnecting keyboard does NOT fix it. Connecting a different keyboard does NOT fix it. That one won't work, either. Drivers are up-to-date. Removing and reinstalling drivers does NOT fix it. Restarting the computer does NOT fix it. In fact, when the Windows logon screen appears the keyboard won't work and neither will the icon to pull up the on-screen keyboard. My mouse can click around just fine. I can only log onto a non-password protected account. Generally, logging into as different Windows user fixes it. I can then log back on to my main user account and continue work for a few hours until it happens again. Clearing my Chrome browsing data stopped the problem from recurring for a week or so. I have already REINSTALLED Windows 7 (not just a restore.) The problem returned after 2 days of use. I use Avira free antivirus software, and repeated scans turn up nothing fishy. I suspect it is related to something in Google Chrome because I used my google account to reload all my previous Chrome extensions, saved data, etc. (Chrome Extensions Installed: AdBlock, Better Google Tasks, DropBox, FB Photo Zoom, Google Mail Checker, StayFocusd.) Any ideas? Any at all?

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• How can I get my SATA DVDs working again?

  - by user269051

  My hard drive crashed (WinXPpro), so I took a C drive from a broken PC. The new C drive is Win7pro. Motherboard is MSI K8N Neo4 Platinum, with 4 hard drives installed on SATA 1-4 (nForce4 Ultra); the two DVD drives are loaded on SATA 7-8 (Silicon Image SATARAID5). I've tweaked BIOS settings every which way. The closest thing to success was when each DVD had both a CD and a DVD icon, and blinked green. No CD or DVD could be read in either drive. I assume that the problem resulted from the fact that my new C drive does not have the RAID drivers? I've tried loading from the floppy (doesn't work). I can't boot off the DVD/CD, and switching the DVD's SATA cable to the SATA 3 slot (and pulling one of the hard discs) didn't work. I'd like to be able to use the other two available SATA slots for a mirrored RAID drive, and get my DVDs working again. Any suggestions?

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• Copy a harddrive from a failed desktop machine using a second working one. [closed]

  - by MrEyes

  Heres the scenario: I have PC-A, an old PC that runs Windows XP but now refuses to boot due to a failed motherboard (or maybe PSU). This PC has a single 80gb IDE drive. I also have PC-B, running Windows Vista, this is working fine. I want to copy all the data off PC-As HDD onto PC-B. To do this I have taken the HDD out of PC-A and connected it as a slave to PC-B. PC-B now boots and sees the additional drive. However, when I attempt to access/copy user folders (i.e. Documents and Settings/[username]/*) I am told that I cannot access the folders due to user permissions. I am doing this under an adminstrator account on PC-B. So the question is, how can I "backup" the data? Preferably without making any changes to the drive contents. The reason for this is that it is possible that PC-A is failing due to a bad PSU, so I intend to replace it before writing off the machine. However I would feel much happier if I had a backup of the data on the HDD.

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