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• Python: How do sets work

  - by Guy

  I have a list of objects which I want to turn into a set. My objects contain a few fields that some of which are o.id and o.area. I want two objects to be equal if these two fields are the same. ie: o1==o2 if and only if o1.area==o2.area and o1.id==o2.id. I tried over-writing __eq__ and __cmp__ but I get the error: TypeError: unhashable instance. What should I over-write?

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• Java: change an element in a prepopulated List of string array.

  - by battousai622

  I have a List of string array already populated in storeInv. How do i change a specific element in the string array? For example the code below... Thanks =] List <String[]> storeInv ; //assume already populated with elements String[] store = storeInv.get(5); store[1] = 123; store.set(5, store[1]); //this gives me an error.

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• Techniques for querying a set of object in-memory in a Java application

  - by Edd Grant

  Hi All, We have a system which performs a 'coarse search' by invoking an interface on another system which returns a set of Java objects. Once we have received the search results I need to be able to further filter the resulting Java objects based on certain criteria describing the state of the attributes (e.g. from the initial objects return all objects where x.y z && a.b == c). The criteria used to filter the set of objects each time is partially user configurable, by this I mean that users will be able to select the values and ranges to match on but the attributes they can pick from will be a fixed set. The data sets are likely to contain <= 10,000 objects for each search. The search will be executed manually by the application user base probably no more than 2000 times a day (approx). It's probably worth mentioning that all the objects in the result set are known domain object classes which have Hibernate and JPA annotations describing their structure and relationship. Off the top of my head I can think of 3 ways of doing this: For each search persist the initial result set objects in our database, then use Hibernate to re-query them using the finer grained criteria. Use an in-memory Database (such as hsqldb?) to query and refine the initial result set. Write some custom code which iterates the initial result set and pulls out the desired records. Option 1 seems to involve a lot of toing and froing across a network to a physical Database (Oracle 10g) which might result in a lot of network and disk activity. It would also require the results from each search to be isolated from other result sets to ensure that different searches don't interfere with each other. Option 2 seems like a good idea in principle as it would allow me to do the finer query in memory and would not require the persistence of result data which would only be discarded after the search was complete. Gut feeling is that this could be pretty performant too but might result in larger memory overheads (which is fine as we can be pretty flexible on the amount of memory our JVM gets). Option 3 could be very performant but is something I would like to avoid as any code we write would require such careful testing that the time taken to acheive something flexible and robust enough would probably be prohibitive. I don't have time to prototype all 3 ideas so I am looking for comments people may have on the 3 options above, plus any further ideas I have not considered, to help me decide which idea might be most suitable. I'm currently leaning toward option 2 (in memory database) so would be keen to hear from people with experience of querying POJOs in memory too. Hopefully I have described the situation in enough detail but don't hesitate to ask if any further information is required to better understand the scenario. Cheers, Edd

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• Flash+PHP+cookie

  - by naveen

  I want an animation play only once in the browser. If any user seen the movie and if goes to any other page or refresh(F5) and then come back on the animation page then animation should not play from start. I want to play it from another frame. I think it can be done by set cookie or somthing using javascript or php. Please anybody help me. Thanks in advance. I will appreciate ,if some code help please

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• how to use database name as a value

  - by user316833

  I have more than 1000 access databases with the same table names.Each database has a unique name. In each database, I want to add column to one existing table and populate that new column (all rows in the table would be the same) with the database name. I found the example below - How can I alter this to give the new column the name of the database. ALTER TABLE TestTable ADD NewColumn INT; UPDATE TestTable SET NewColumn = 0;

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• Android. How do I keep a button displayed as PRESSED until the action created by that button is finished?

  - by user527405

  I have button_focused, button_pressed, and button_normal images. When I press the button, the button_pressed image is displayed and the action related to the button pressing begins. When I quit pressing the button, the action continues but the button returns to button_normal image being displayed. How can I set the button image being displayed to button_pressed during the entire action then reset to the button_normal image? Thank you for your time

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• What is wrong with this recursive Windows CMD script? It won't do Ackermann properly

  - by boost

  I've got this code that I'm trying to get to calculate the Ackermann function so that I can post it up on RosettaCode. It almost works. I thought maybe there'd be a few batch file wizards on StackOverflow. ::echo off set depth=0 :ack if %1==0 goto m0 if %2==0 goto n0 :else set /a n=%2-1 set /a depth+=1 call :ack %1 %n% set t=%errorlevel% set /a depth-=1 set /a m=%1-1 set /a depth+=1 call :ack %m% %t% set t=%errorlevel% set /a depth-=1 if %depth%==0 ( exit %t% ) else ( exit /b %t% ) :m0 set/a n=%2+1 if %depth%==0 ( exit %n% ) else ( exit /b %n% ) :n0 set /a m=%1-1 set /a depth+=1 call :ack %m% %2 set t=%errorlevel% set /a depth-=1 if %depth%==0 ( exit %t% ) else ( exit /b %t% ) I use this script to test it @echo off cmd/c ackermann.cmd %1 %2 echo Ackermann of %1 %2 is %errorlevel% A sample output, for Test 1 1, gives: >test 1 1 >set depth=0 >if 1 == 0 goto m0 >if 1 == 0 goto n0 >set /a n=1-1 >set /a depth+=1 >call :ack 1 0 >if 1 == 0 goto m0 >if 0 == 0 goto n0 >set /a m=1-1 >set /a depth+=1 >call :ack 0 0 >if 0 == 0 goto m0 >set/a n=0+1 >if 2 == 0 (exit 1 ) else (exit /b 1 ) >set t=1 >set /a depth-=1 >if 1 == 0 (exit 1 ) else (exit /b 1 ) >set t=1 >set /a depth-=1 >set /a m=1-1 >set /a depth+=1 >call :ack 0 1 >if 0 == 0 goto m0 >set/a n=1+1 >if 1 == 0 (exit 2 ) else (exit /b 2 ) >set t=2 >set /a depth-=1 >if 0 == 0 (exit 2 ) else (exit /b 2 ) Ackermann of 1 1 is 2

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• cset as non-root to set cpu affinity for running processes

  - by RaveTheTadpole

  I've been playing with cset to set cpu affinity for running processes. I'm recreating the built-in "shield" function manually with set and proc, to add some subsets for specific threads of my application. I have a bash script that is calling cset to create the sets, and move the correct threads to the correct sets. It works when run with sudo. Now I'd like to make this script executable by another user, who does not have sudo powers. I trust this user enough to be responsible with cset, but don't want to open up the wide powers of root. I thought that CAP_SYS_NICE -- which is needed for sched_setaffinity, which I just assume cset must use -- on the script would be sufficient, but that didn't work. I tried extending CAP_SYS_NICE to the cset program (which is a thin python wrapper for the cset python library). No dice. The output of cap_to_text on my CAP_SYS_NICE'd scripts is "=cap_ipc_lock,cap_sys_nice,cap_sys_resource+eip" (it has ipc_lock and sys_resource for other reasons; I think only sys_nice is relevant). Any ideas?

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• Cachefilesd (cachefiles) everything seems to be set up, still not working

  - by Evgenius

  I'm trying to set up cachefilesd to work with my network folder shared using NFS. I have seemingly everything set up, however cachefilesd starts normally, however caching isn't functioning. Here is output of commands, which I ran in the same order 1 sudo mount ... cache-1:/mnt/datashared on /mnt/nfsshare type nfs (rw,sync,ac,acregmin=3,acregmax=60,acdirmin=30,acdirmax=300,lookupcache=pos,vers=3,fsc) ... 2 lsbmod | grep cachefiles cachefiles 40555 1 fscache 57430 4 nfs,cifs,cachefiles,nfsv4 3 [edited - deleted] 4 uname -r 3.8.0-34-generic 5 grep CONFIG_NFS_FSCACHE /boot/config-3.8.0-34-generic CONFIG_NFS_FSCACHE=y 6 lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 13.04 Release: 13.04 Codename: raring 7 sudo service cachefilesd restart * Restarting FilesCache daemon cachefilesd [ OK ] 8 dmesg [6211206.141781] FS-Cache: Withdrawing cache "mycache" [6211210.135236] FS-Cache: Cache "mycache" added (type cachefiles) [6211210.135242] CacheFiles: File cache on sdb1 registered [6214644.348929] CacheFiles: File cache on sdb1 unregistering [6214644.348935] FS-Cache: Withdrawing cache "mycache" [6214654.575909] FS-Cache: Cache "mycache" added (type cachefiles) [6214654.575915] CacheFiles: File cache on sdb1 registered 9 ps aux | grep cachefilesd root 65399 0.0 0.0 4460 540 ? Ss 23:14 0:00 /sbin/cachefilesd 1000 65464 0.0 0.0 8160 916 pts/0 S+ 23:16 0:00 grep --color=auto cachefilesd finally, biggest problem is 10 cat /proc/fs/nfsfs/volumes NV SERVER PORT DEV FSID FSC v3 64476645 801 0:24 233e020f0da07a93 no tl;dr I think I configured everything properly but FSC mount option + fscachefilesd don't seem to work

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• Xen dom0 reports incorrect amount of RAM with dom0_mem set

  - by xen_amnesiac

  I've done a fair bit of searching about this, but have found nothing that answers my question. I have a system with 6GB of RAM which acts as a Xen server. For reference, it runs Ubuntu 12.04. I've set the kernel parameter dom0_mem:512M,max:512M in /etc/default/grub as follows: GRUB_CMDLINE_XEN_DEFAULT="dom0_mem=min:512M,max:512M" I've tried variations of that, with the same result. My question is this: With the above set, the dom0 reports in all applications a RAM amount of 422M. cat /proc/meminfo gives the following: $ cat /proc/meminfo MemTotal: 432472 kB MemFree: 54144 kB Buffers: 17640 kB Cached: 220104 kB SwapCached: 30172 kB Active: 136500 kB Inactive: 167780 kB Active(anon): 6156 kB Inactive(anon): 60516 kB Active(file): 130344 kB Inactive(file): 107264 kB Unevictable: 52 kB Mlocked: 52 kB SwapTotal: 1794044 kB SwapFree: 1682012 kB Dirty: 0 kB Writeback: 0 kB AnonPages: 39572 kB Mapped: 8048 kB Shmem: 136 kB Slab: 44324 kB SReclaimable: 22012 kB SUnreclaim: 22312 kB KernelStack: 1280 kB PageTables: 3840 kB NFS_Unstable: 0 kB Bounce: 0 kB WritebackTmp: 0 kB CommitLimit: 2010280 kB Committed_AS: 329192 kB VmallocTotal: 34359738367 kB VmallocUsed: 313988 kB VmallocChunk: 34359417340 kB HardwareCorrupted: 0 kB AnonHugePages: 0 kB HugePages_Total: 0 HugePages_Free: 0 HugePages_Rsvd: 0 HugePages_Surp: 0 Hugepagesize: 2048 kB DirectMap4k: 524696 kB DirectMap2M: 0 kB top, htop, free -m, and byobu's RAM monitor all report the same amount. At first I thought this was because of the onboard graphics borrowing some memory, but have now switched to a dedicated GPU and it persists. Is this normal behavior, or has something gone amiss? It's just about 100MB of RAM that's "gone", and I have no idea where it went. I understand that it's normal that not all RAM is available for allocation, but does the system really take an amount relatively high to the amount of RAM available?

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• E-mail hosting provider that can set up aliases with wildcards

  - by Richard Downer

  I am looking for an e-mail hosting provider that allow e-mail aliases containing wildcards. In more detail: I own my own domain. I want an e-mail hosting provider to manager e-mail for my domain. Now, to help deal with spam, I often give different e-mail addresses to different organisations. These e-mail addresses always start with the same prefix, but then differ. So, for example, I might give out these e-mail addresses: [email protected] [email protected] [email protected] I want to be able to go to the e-mail provider's control panel and set up an e-mail alias like this: [email protected] -- bounce/discard (because this address has been sold to spammers) joe-*@sample.com -- redirect to [email protected] What's I don't want to do is either have to set up every single e-mail address individually (because I make them up whenever I need them), nor do I want to have a general catch-all for any unrecognised address in my domain (because I don't want to be carpet-bombed with spam when a spammer runs a dictionary attack against my domain name.) Although this seems like a useful feature to have, it seems to be a little-known feature and I've not seen anybody advertise this feature. My current hosting provider offer this but I want to move away from them, so I need another provider that will continue to work with all the e-mail addresses I've been using for years. Alternatively, I could use mail server software that runs on Windows - I have seen some commercial packages offering this feature but they cost more than I can afford - are there any suggestions for low-cost software packages?

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• How to set the VirtualDocumentRoot based on the files within

  - by Chuck Vose

  I'm trying to set up Apache to use the VirtualDocumentRoot directive but my sites aren't all exactly the same. Most of the sites have a drupal folder which should be the root but there are a few really old drupal sites, a few rails sites, some django sites, etc. that want the Document root to be / or some other folder. Is there a way to set up VirtualDocumentRoot based on a conditional or is there a way to use RewriteRule/Cond to detect that / is the incorrect folder if there is a drupal folder or a public folder? Here's what I have so far: <VirtualHost *:80> # Wildcard ServerAlias, this is the default vhost if no specific vhost matches first. ServerAlias *.unicorn.devserver.com # Automatic ServerName, based on the HTTP_HOST header. UseCanonicalName Off # Automatic DocumentRoot. This uses the 4th level domain name as the document root, # for example http://bar.foo.baz.com/ would respond with /Users/vosechu/Sites/bar/drupal. VirtualDocumentRoot /Users/vosechu/Sites/%-4/drupal </VirtualHost> Thanks in advance! -Chuck

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• MYSQL - Multiple set values in one update statement [migrated]

  - by Maurzank

  MYSQL - MULTIPLE SET VALUES IN ONE UPDATE STATEMENT USING 2 TABLES AS REFERENCE AND STORING VALUES IN ONE OF THOSE TABLES WITH A SPECIFIC LOGIC. Hello people, A problem came up by making an UPDATE. The example issue is as follows: CURRENUSRTABLE +------------+-------+ | ID | STATE | +------------+-------+ | 123 | 3 | | 456 | 3 | | 789 | 3 | +------------+-------+ HISTORYTABLE +------------+------------+-----+ | ID | TRDATE | ACT | +------------+------------+-----+ | 123 | 2013-11-01 | 5 | | 456 | 2013-11-01 | 5 | | 789 | 2013-11-01 | 5 | | 123 | 2013-11-02 | 4 | | 456 | 2013-11-02 | 4 | | 789 | 2013-11-02 | 4 | | 123 | 2013-11-03 | 3 | | 456 | 2013-11-03 | 3 | | 789 | 2013-11-03 | 3 | +------------+------------+-----+ I'm using these variables: @BA=3, @DE=5, @BL=4, What I'm trying to do is an update on CURRENUSRTABLE.STATE using HISTORYTABLE.ACT with the following logic: STATE value will be updated as ACT value, except when STATE value is 4 and ACT is 3, then STATE will be 5 I made this statement: UPDATE CURRENUSRTABLE RIGHT OUTER JOIN HISTORYTABLE ON HISTORYTABLE.ID=CURRENUSRTABLE.ID SET CURRENUSRTABLE.STATE= ( SELECT CASE HISTORYTABLE.ACT WHEN @DE THEN @DE WHEN @BL THEN @BL WHEN @BA THEN CASE CURRENUSRTABLE.STATE WHEN @BL THEN @DE ELSE @BA END END ORDER BY HISTORYTABLE.TRDATE,FIELD(HISTORYTABLE.ACT,@DE,@BL,@BA) ) WHERE HISTORYTABLE.TRDATE BETWEEN '2013-11-01' AND '2013-11-01' I'm intentionally using "RIGHT OUTER JOIN" and "HISTORYTABLE.TRDATE BETWEEN" because I'd like to change the values in CURRENUSRTABLE using a timeframe of more than one day. If I execute this statement many times using only one day (i.e. "BETWEEN '2013-11-01' AND '2013-11-01'" and then "BETWEEN '2013-11-02' AND '2013-11-02'"... etc ) it works perfectly, but if it is executed using the dates "BETWEEN '2013-11-01' AND '2013-11-03'" the results on CURRENUSRTABLE.STATE are 3, which is wrong, it should be 5. I think the problem relies on "CASE CURRENUSRTABLE.STATE" when uses "HISTORYTABLE.TRDATE BETWEEN '2013-11-01' AND '2013-11-03'", because it reads the STATE 9 times which has not been commited yet until the statement ends. Query OK, 9 rows affected (0.00 sec) Rows matched: 9 Changed: 9 Warnings: 0 Maybe the solution is very simple, but unfortunately I've not much practice on MySQL since I've worked with it less than 2 months :) Is there any suggestions to solve this issue? PD: MySQL version is 4.1.22, I know is very old an EOL, unfortunately I have to make these statements on this version. Thanks!

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• Struggling to set-up NLB cluster

  - by Chris W

  I'm trying to set up NLB on a couple of Windows 2008 R2 virtual servers running on top of Hyper V R2. The servers each have a single vNIC for LAN access (and a second vNIC for SAN access). I'm setting up the cluster to use Multicast mode. The vNICs are each set to allow MAC spoofing. Essentially I'm finding that i can add SERVER1 as a host and it will pick up and respond to the cluster IP from a remote subnet. If I then 'stop' the node in NLB manager it still responds when I would expect it to stop answering on that IP. If I recreate the cluster and add SERVER2 as the first host, the wizard completes correctly and an IPCONFIG on the server shows that it now has the cluster IP but I can't ping the cluster IP from a remote subnet but I can from another machine on the same subnet. As a final test - with both servers in the cluster, pinging from another machine on the same subnet I still get a response from the cluster IP when both nodes are stopped according to the NLB manager. The two VMs are sat on the same physical blade and are built up exactly the same as they'll be used as SharePoint web front end servers. I'm at a loss as to what could be wrong with the second VM that prevents it taking on the address just as the sole node in the cluster, never mind the strange behaviour of the cluster when I stop/start nodes.

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• How to set up a serial connection to a Windows 7 computer

  - by oli_arborum

  I need to set up a "dial in" connection to a Windows 7 (Ultimate) computer via a serial null-modem cable to be able to connect from a Windows XP client to that computer and exchange data over IP. Question 1: How do I do that? I did neither find the information via Google nor in the MSDN. Seems like no one tried ever before... ;-) I already managed to install a legacy modem device called "Communications cable between two computers" and found the menu entry "New Incoming Connection..." in Network and Internet Network Connections. When I finish this wizard I get the message that the "Routing and Remote Access service" cannot be started. In the event viewer I see the following error messages: "The currently configured authentication provider failed to load and initialize successfully. The requested name is valid, but no data of the requested type was found." (Source: RemoteAccess, EventID: 20152) "The Routing and Remote Access service terminated with service-specific error The requested name is valid, but no data of the requested type was found." (Source: Service Control Manager, EventID: 7024) The Windows 7 installation is "naked", i.e. no additional software or services are installed. Question 2: Am I on the right path to set up the connection? Question 3: How can I get the Routing and Remote Access service running?

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• how to properly set environment variables

  - by avorum

  I've recently started using Windows (having used Ubuntu up until now) and I find myself unable to properly set environment variables. Whenever I set them they don't seem to work. I've been going to Start-Edit Environment Variables for your Account and editing the PATH value in the upper half of the GUI. Here's what I've got so far. ;C:\Chocolatey\bin;C:\tools\mysql\current\bin;C:\Program Files (x86)\Git\bin;C:\Program Files\MySQL\MySQL Server 5.6\bin\;C:\Python33\Scripts; These are each the parent directories of the executables I'd like to be able to run by name from CMD, but mysql, git, and pip aren't being recognized. Am I doing something wrong syntactically or at a general understanding level? I'd like to be able to run these commands without having to specify the full path to the executables every time. EDIT: The full PATH extracted from CMD PATH=C:\Python33\;C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common;C:\Program Files (x86)\AMD APP\bin\x86_64;C:\Program Files (x86)\AMD APP\bin\x86;C:\Program Files\Common Files\Microsoft Shared\Windows Live;C:\Program Files (x86)\Common Files\Microsoft Shared\Windows Live;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files (x86)\GTK2-Runtime\bin;C:\Program Files\WIDCOMM\Bluetooth Software\;C:\Program Files\WIDCOMM\Bluetooth Software\syswow64;C:\Program Files (x86)\ATI Technologies\ATI.ACE\Core-Static;C:\Program Files (x86)\Microsoft ASP.NET\ASP.NET Web Pages\v1.0\;C:\Program Files\Microsoft SQL Server\110\Tools\Binn\;C:\Program Files (x86)\QuickTime\QTSystem\;C:\Program Files (x86)\Common Files\Acronis\SnapAPI\;C:\Program Files (x86)\Java\jre7\bin;C:\Program Files (x86)\Windows Kits\8.1\Windows Performance Toolkit\;C:\Program Files (x86)\Microsoft SDKs\TypeScript\;C:\Program Files (x86)\MySQL\MySQL Utilities 1.3.4\; ;C:\Chocolatey\bin;C:\tools\mysql\current\bin I'm being forced to use Windows by my work environment, I don't enjoy the state of affairs.

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• Correct way to set up office network - 8 workstations, a file server and a staging server

  - by naunu

  Our office had this old school windows 2003 domain setup, our server caught fire, and now we are looking to do it right from scratch. Here is what we need: 5 PC and 3 Mac workstations for web development, they will each have WAMP/MAMP setup on them, managed by their developers. We will have a file server for assets, and a LAMP server with an external IP for staging. Here is what we have to work with: 5 IP addresses, brand new PC file server with windows 2008 SE, D-Link DSS-16+ 16 port switch, belkin 5 port wireless router, cable modem with 4 ports. How I have it set up now (this is a temporary makeshift setup): Cable modem = LAMP server, wireless router Wireless router = Switch = All of the workstations and file server (setup as a workgroup). We have noticed our internet is very slow with us all plugged in to the switch, and the switch plugged in to the router. I am not positive, but I think it is because our router does not have NAT. We are also having problems with the MACs connection to the network drive - it keeps disconnecting. I want this done right, and we have a ~$600 budget to buy anything else we need. Does anybody have any advice for me? Should I set up a domain or workgroup?

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• Can't set screen brightness in Gentoo system

  - by Real Yang

  My system: Linux gentoo 3.10.7-gentoo-r1 VGA compatible controller: NVIDIA Corporation GT216M [GeForce GT 240M] (rev a2) output of xbacklight: No outputs have backlight property output of xrandr: xrandr: Failed to get size of gamma for output default Screen 0: minimum 640 x 480, current 1280 x 720, maximum 1280 x 768 default connected 1280x720+0+0 0mm x 0mm 1280x720 0.0* 1024x768 61.0 800x600 61.0 640x480 60.0 1280x768 0.0 output of ls /proc/acpi: button/ event When I'm in kernel 3.8.13, I can change my brightness using xbacklight. I compiled 3.10.7-r1 using genkernel all. Before the upgrade I did get a notice of "compatible issues for Nvdia users" from emerge but I still don't know the details. It there anyway to let me set the brightness? Then i found a ebuild app-laptop/nvdiabl-0.81 and tried to emerege nvidabl, I got this message: Your kernel does not support FB_BACKLIGHT. To enable you it you can enable any frame buffer with backlight control or nouveau. Note that you cannot use FB_NVIDIA with nvidia's proprietary driver Please check to make sure these options are set correctly. Failure to do so may cause unexpected problems. Once you have satisfied these options, please try merging this package again. ERROR: app-laptop/nvidiabl-0.81::gentoo failed (pretend phase): Incorrect kernel configuration options Call stack: ebuild.sh, line 93: Called pkg_pretend nvidiabl-0.81.ebuild, line 31: Called linux-mod_pkg_setup linux-mod.eclass, line 559: Called linux-info_pkg_setup linux-info.eclass, line 911: Called check_extra_config linux-info.eclass, line 805: Called die The specific snippet of code: die "Incorrect kernel configuration options" [SOLVED] I enter the menuconfig again and check the Device Drivers -> Graphics support -> Support for frame buffer devices, then i found this: <*> nVidia Framebuffer Support [*] Support for backlight control (NEW) What can i say. Recompiling...

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• How to set only specific nginx server block into maintenance mode programmatically

  - by Ville Mattila

  I am looking for a solution to automate one of our application's deployment process. In the beginning of deployment, I would like to programmatically set the specified server into maintenance mode and finally after the deployment has been completed, remove the maintenance mode flag from the nginx server. By maintenance mode, I mean that nginx should response with HTTP Response Code 503 to all the requests (with possible custom page). I know how to set the server block to respond with 503 code (see http://www.cyberciti.biz/faq/custom-nginx-maintenance-page-with-http503/) but the question is about how to do this programmatically and most efficiently. Two options have came to my mind: Option 1: At the beginning of the deployment process, write a maintenance file into document root and conditionally check an existence of the maintenance file in nginx server config: server { if (-f $document_root/in_maintenance_mode) { return 503; } } This method contains certain overhead as the file existence is checked for each request. Is it possible to check the file existence only when loading the nginx config? Option 2: Deployment script replaces the whole nginx server configuration file with a maintenance version and swaps it back in the end of the deployment. If this method is used, I am concerned about possible other automation processes like puppet that may be override the maintenance configuration file.

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• how to set cache control to public in iis 7.5

  - by ivymike

  I'm trying to set cache control header to max age using the following snippet in my web.config: <system.webServer> <staticContent> <clientCache cacheControlMode="UseMaxAge" cacheControlMaxAge="1.00:00:00" /> </staticContent> </system.webServer> Some how this isn't being reflected in the response. Instead I see a Cache-Control: private header on the responses. I'm using NancyFx framework (which is a layer on top of Asp.net). Is there any thing else I need to do ? Below are the reponse headers I receive: HTTP/1.1 200 OK\r\n Cache-Control: private\r\n Content-Type: application/x-javascript\r\n Content-Encoding: gzip\r\n Last-Modified: Mon, 19 Mar 2012 16:42:03 GMT\r\n ETag: 8ced406593e38e7\r\n Vary: Accept-Encoding\r\n Server: Microsoft-IIS/7.5\r\n Nancy-Version: 0.9.0.0\r\n Set-Cookie: NCSRF=AAEAAAD%2f%2f%2f%2f%2fAQAAAAAAAAAMAgAAADxOYW5jeSwgVmVyc2lvbj0wLjkuMC4wLCBDdWx0dXJlPW5ldXRyYWwsIFB1YmxpY0tleVRva2VuPW51bGwFAQAAABhOYW5jeS5TZWN1cml0eS5Dc3JmVG9rZW4DAAAAHDxSYW5kb21CeXRlcz5rX19CYWNraW5nRmllbGQcPENyZWF0ZWREYXRlPmtfX0JhY2tpbmdGaWVsZBU8SG1hYz5rX19CYWNraW5nRmllbGQHAAcCDQICAAAACQMAAADTubwoldTOiAkEAAAADwMAAAAKAAAAAkpT5d9aTSzL3BAPBAAAACAAAAACPUCyrmSXQhkp%2bfrDz7lZa7O7ja%2fIg7HV9AW6RbPPRLYLAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA%3d; path=/; HttpOnly\r\n X-AspNet-Version: 4.0.30319\r\n Date: Tue, 20 Mar 2012 09:44:20 GMT\r\n Content-Length: 1624\r\n

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• Set postfix to send email but not to receive them

  - by CodeShining

  I'm using Google Apps to handle personal email addresses for my domain name, and I set up the DNS as Google suggests. All works fine. Now since I need a SMTP to send emails from my e-commerce I installed Postfix on the server. It works fine when I send emails to any email address but it doesn't send to the same domain name, so let's say my domain is example.com, I set postfix using example.com, if I try to reset a password using [email protected] postfix doesn't send and instead reports on the mail.log Sep 20 01:09:52 ip-10-54-26-162 postfix/pickup[6809]: B09A3415D8: uid=33 from=<www-data> Sep 20 01:09:52 ip-10-54-26-162 postfix/cleanup[6854]: B09A3415D8: message-id=<20120920010952.B09A3415D8@ip-10-54-26-162.eu-west-1.compute.internal> Sep 20 01:09:52 ip-10-54-26-162 postfix/qmgr[30978]: B09A3415D8: from=<[email protected]>, size=4234, nrcpt=1 (queue active) Sep 20 01:09:52 ip-10-54-26-162 postfix/local[6856]: B09A3415D8: to=<[email protected]>, relay=local, delay=0.01, delays=0.01/0/0/0, dsn=5.1.1, status=bounced (unknown user: "myaccount") Of course it cannot find a local user "myaccount" since that account is on Google Apps... How can I tell Postfix to send the email and do not search for a local user?

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• Set proper rights for sshfs mountpoint so it can be shared with samba

  - by CS01

  I have a domain hoster that provides access via SSH. My platforms are: Gentoo 2.6.36-r5 Windows (XP/Vista/7) I work on my Windows, I use Gentoo to do all the magic Windows can't do. Therefore I use sshfs to mount the remote public directory for my domain to /mnt/mydomain.com. Authentication is done via keys, so lazy me don't have to type in my password every now and then. Since I do my coding on Windows, and I don't want to upload/download the changed files all the time, I want to access this /mnt/mydomain.com via a samba share. So I shared /mnt in samba, all mounts except mydomain.com is listed on my Windows Explorer. My theories are: sshfs does not set the mountpoint uid/gid to something that samba expects samba does not know that it has to include the uid/gid that /mnt/mydomain.com has been set. All above is wrong, and I don't know. Here are configs and output from console, need anything else just let me know. Also no errors or warnings that I take notice of being relevant to this issue, but I might be wrong. gentoo ~ # ls -lah /mnt total 20K drwxr-xr-x 9 root root 4.0K Mar 26 16:15 . drwxr-xr-x 18 root root 4.0K Mar 26 2011 .. -rw-r--r-- 1 root root 0 Feb 1 16:12 .keep drwxr-xr-x 1 root root 0 Mar 18 12:09 buffer drwxr-s--x 1 68591 68591 4.0K Feb 16 15:43 mydomain.com drwx------ 2 root root 4.0K Feb 1 16:12 cdrom drwx------ 2 root root 4.0K Feb 1 16:12 floppy drwxr-xr-x 1 root root 0 Sep 1 2009 services drwxr-xr-x 1 root root 0 Feb 10 15:08 www /etc/samba/smb.conf [mnt] comment = Mount points writable = yes writeable = yes browseable = yes browsable = yes path = /mnt /etc/fstab sshfs#[email protected]:/home/to/pub/dir/ /mnt/mydomain.com/ fuse comment=sshfs,noauto,users,exec,uid=0,gid=0,allow_other,reconnect,follow_symlinks,transform_symlinks,idmap=none,SSHOPT=HostBasedAuthentication 0 0 For an easier read: [email protected] /home/to/pub/dir/ /mnt/mydomain.com/ options: comment=sshfs noauto users exec uid=0 gid=0 allow_other reconnect follow_symlinks transform_symlinks idmap=none SSHOPT=HostBasedAuthentication Help!

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• Set proper rights for sshfs mountpoint so it can be shared with samba

  - by CS01

  I have a domain hoster that provides access via SSH. My platforms are: Gentoo 2.6.36-r5 Windows (XP/Vista/7) I work on my Windows, I use Gentoo to do all the magic Windows can't do. Therefore I use sshfs to mount the remote public directory for my domain to /mnt/mydomain.com. Authentication is done via keys, so lazy me don't have to type in my password every now and then. Since I do my coding on Windows, and I don't want to upload/download the changed files all the time, I want to access this /mnt/mydomain.com via a samba share. So I shared /mnt in samba, all mounts except mydomain.com is listed on my Windows Explorer. My theories are: sshfs does not set the mountpoint uid/gid to something that samba expects samba does not know that it has to include the uid/gid that /mnt/mydomain.com has been set. All above is wrong, and I don't know. Here are configs and output from console, need anything else just let me know. Also no errors or warnings that I take notice of being relevant to this issue, but I might be wrong. gentoo ~ # ls -lah /mnt total 20K drwxr-xr-x 9 root root 4.0K Mar 26 16:15 . drwxr-xr-x 18 root root 4.0K Mar 26 2011 .. -rw-r--r-- 1 root root 0 Feb 1 16:12 .keep drwxr-xr-x 1 root root 0 Mar 18 12:09 buffer drwxr-s--x 1 68591 68591 4.0K Feb 16 15:43 mydomain.com drwx------ 2 root root 4.0K Feb 1 16:12 cdrom drwx------ 2 root root 4.0K Feb 1 16:12 floppy drwxr-xr-x 1 root root 0 Sep 1 2009 services drwxr-xr-x 1 root root 0 Feb 10 15:08 www /etc/samba/smb.conf [mnt] comment = Mount points writable = yes writeable = yes browseable = yes browsable = yes path = /mnt /etc/fstab sshfs#[email protected]:/home/to/pub/dir/ /mnt/mydomain.com/ fuse comment=sshfs,noauto,users,exec,uid=0,gid=0,allow_other,reconnect,follow_symlinks,transform_symlinks,idmap=none,SSHOPT=HostBasedAuthentication 0 0 For an easier read: [email protected] /home/to/pub/dir/ /mnt/mydomain.com/ options: comment=sshfs noauto users exec uid=0 gid=0 allow_other reconnect follow_symlinks transform_symlinks idmap=none SSHOPT=HostBasedAuthentication Help!

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• I've just set up FreeBSD 8.0 and can't login with ssh

  - by Matt

  /etc/hosts.allow is set to allow any protocol from anywhere. I can "ssh localhost" and it works. I simply get "connection refused" from putty on another machine. Any ideas? Will try to get a copy of the sshd_server.conf file as soon as I can find a flash disk to copy it to, but I thought someone might know what you need to set initially to permit login. EDIT: I think I can see why it's not working now. If I telnet to the IP address of the server I'm seeing MGE UPS SYSTEMS SNMP Web/Agent configuration menu. Enter Password: Doh. Ok, so the IP address is assigned by DHCP, but it seems there is already a device statically assigned to that address. I'll put in a reservation and try again. ok, sorted now. It was an ip address conflict. Windows DHCP isn't smart enough to check if there is something listening on the address before first assigning it.

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• How to set umask globally?

  - by DevSolar

  I am using a private user group setup, i.e. a user foo's home directory is owned by foo:foo, not foo:users. For this to work, I need to set the umask to 002 globally. After a quick grep -RIi umask /etc/*, it seemed for a moment that modifying the UMASK entry in /etc/login.defs should do the trick. It does, too -- but only for console logins. If I log in to my desktop, and open a terminal there, I still get to see the default umask 022. Same goes for files created from apps started through the menu. Apparently, the display manager (or whatever X11 component responsible) does source some different setting than a console login does, and damned if I could tell which one it is. (I tried changing the setting in /etc/init.d/rc, and no, it did not help.) How / where do I set umask globally (and for all users), so that the X11 desktop environment gets the memo as well? (The system is Linux Mint / Ubuntu, in case that changes anything...)

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