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• MS Bing web crawler out of control causing our site to go down

  - by akaDanPaul

  Here is a weird one that I am not sure what to do. Today our companies e-commerce site went down. I tailed the production log and saw that we were receiving a ton of request from this range of IP's 157.55.98.0/157.55.100.0. I googled around and come to find out that it is a MSN Web Crawler. So essentially MS web crawler overloaded our site causing it not to respond. Even though in our robots.txt file we have the following; Crawl-delay: 10 So what I did was just banned the IP range in iptables. But what I am not sure to do from here is how to follow up. I can't find anywhere to contact Bing about this issue, I don't want to keep those IPs blocked because I am sure eventually we will get de-indexed from Bing. And it doesn't really seem like this has happened to anyone else before. Any Suggestions? Update, My Server / Web Stats Our web server is using Nginx, Rails 3, and 5 Unicorn workers. We have 4gb of memory and 2 virtual cores. We have been running this setup for over 9 months now and never had an issue, 95% of the time our system is under very little load. On average we receive 800,000 page views a month and this never comes close to bringing / slowing down our web server. Taking a look at the logs we were receiving anywhere from 5 up to 40 request / second from this IP range. In all my years of web development I have never seen a crawler hit a website so many times. Is this new with Bing?

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• What is the correct term for - server/client database sync via API?

  - by Daniel

  Forgive the vague question title. I've been programming mobile apps for 3 years now, and I've got a little too far from the web services and server side code then I probably should have. Anyway, I'm doing a personal project now and I want to create an web API for it. One of my requirements is to check for updates from my app, so I would send a timestamp to the API. I've used many APIs that my clients prepared for me and only now am I appreciating their work ! What is the term or technique used to create an API backed by a database which tracks changes via dates/timestamps, basically an effective way for me to query changes occurring since a timestamp. Simply put, I want that my app can call my API in order to sync new data and changed data from the server, to the app. The app would only have a timestamp of the last time it synced with the server. Would I have a log table for each data table in my database which adds a record for each change? Then I could query all changes with a timestamp superior to the one passed to the API. Can anyone point me in the right direction on this?

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• Java issues on OpenVZ Ubuntu 11.04 (.jar/.sh files)

  - by IWillNotChange

  I've had a whole line of messes with java and .jar files. I've tried both OpenJDK (from software installer) and about three repositories for Sun. /Desktop# java -jar -Xmx1024m ss.jar Exception in thread "main" java.awt.HeadlessException at java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:173) at java.awt.Window.<init>(Window.java:476) at java.awt.Frame.<init>(Frame.java:419) at java.awt.Frame.<init>(Frame.java:384) at javax.swing.JFrame.<init>(JFrame.java:174) at org.powerbot.bd.<init>(Unknown Source) at org.powerbot.Boot.main(Unknown Source) Two separate errors: ~/Desktop# ./ss.sh [SEVERE] org.server.Boot: Default heap size of 490m too small, restarting with 768m and about 30 different crashes were it just "aborts" with a huge file dump. Each time I've tried something a little different, whether it be updating Java or just changing -Xmx1024 to -Xmx1024m to get rid of the heap. Personally I think it has something to do with OpenVZ, but Google hasn't saved me this time, I need someone who can get to the bottom of my problem. java -version java version "1.6.0_26" Java(TM) SE Runtime Environment (build 1.6.0_26-b03) Java HotSpot(TM) 64-Bit Server VM (build 20.1-b02, mixed mode) is my current install. Running ss.sh gives me: (I'd post the entire log but its long) # # A fatal error has been detected by the Java Runtime Environment: # # SIGILL (0x4) at pc=0x00002b14278e6fa0, pid=9301, tid=47365590714112 # # JRE version: 6.0_26-b03 # Java VM: Java HotSpot(TM) 64-Bit Server VM (20.1-b02 mixed mode linux-amd64 compressed oops) # Problematic frame: # C [ld-linux-x86-64.so.2+0x14fa0] _dl_make_stack_executable+0x2b50 # # If you would like to submit a bug report, please visit: # http://java.sun.com/webapps/bugreport/crash.jsp # The crash happened outside the Java Virtual Machine in native code. # See problematic frame for where to report the bug. # I'm willing to let someone who knows what they are talking about view it and try and sort this out. Any help would be appreciated, I've about pulled all my hair Googling to no avail.

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• httpd memory could not be written on winxp

  - by Shawn

  I have a apache server on a winxp box, ocassionaly I got a "httpd error, memory could not be written" error, here is what I found in the apache error-log `[Sat Sep 12 10:58:34 2009] [error] [client 113.68.84.79] Invalid URI in request ;\xece\r\xd5m\xed{\xbcf\xbf\xffq\bZNB\xf0a\xf9\x13\xf3[\x06Y\x02G\xca\xc5\xf3\x9ft\x89b\xed\xb5m\x9f\x1c\xa6\x03\x10\xee\xe9G\xb5\xe0glLf\xd4eFT\x8f.{Ysl\x89\x05\x18\x0f\x0fp\xdd\xaf\x11G\xbe\xbf\x96/Pr\x9e\xf4\x89\xf2\xd4^mA\x13y2\xe3\x95\xaeD\x02\xa7*G\xe4\x1d\x07r^\xaf_J\xf7\xbc\x90\x17\xda\x90\x17\xec\xd4\xe8\xe4\xfcU\x04\xbc2V\xe1\x170\xeb Error in my_thread_global_end(): 66 threads didn't exit [Sat Sep 12 11:08:43 2009] [notice] Parent: child process exited with status 3221225477 -- Restarting. [Sat Sep 12 11:08:51 2009] [notice] Apache/2.2.4 (Win32) PHP/5.2.3 configured -- resuming normal operations` Anybody can tell what this means and where the problem is ? Thanks.

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• Vista locks up after ~10h. of activity

  - by Naomi

  Hi everybody, I am experiencing a problem: Windows Vista completely freezes/locks up lately... It happened today twice - the mouse and keyboard stopped responding and I had to re-boot. I checked the Application Events Log and I see these two errors: Event filter with query "SELECT * FROM __InstanceModificationEvent WITHIN 60 WHERE TargetInstance ISA "Win32_Processor" AND TargetInstance.LoadPercentage 99" could not be reactivated in namespace "//./root/CIMV2" because of error 0x80041003. Events cannot be delivered through this filter until the problem is corrected. and then The following boot-start or system-start driver(s) failed to load: SASDIFSV SASKUTIL I checked Help online and it points to http://technet.microsoft.com/en-us/library/cc756390%28WS.10%29.aspx and suggests Updating the drivers. I'm not sure why would I have problem with drivers and if so, how can I find out which drivers to update? Can you please help me? Thanks in advance.

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• Monitor SQL Server Replication Jobs

  - by Yaniv Etrogi

  The Replication infrastructure in SQL Server is implemented using SQL Server Agent to execute the various components involved in the form of a job (e.g. LogReader agent job, Distribution agent job, Merge agent job) SQL Server jobs execute a binary executable file which is basically C++ code. You can download all the scripts for this article here SQL Server Job Schedules By default each of job has only one schedule that is set to Start automatically when SQL Server Agent starts. This schedule ensures that when ever the SQL Server Agent service is started all the replication components are also put into action. This is OK and makes sense but there is one problem with this default configuration that needs improvement  -  if for any reason one of the components fails it remains down in a stopped state.   Unless you monitor the status of each component you will typically get to know about such a failure from a customer complaint as a result of missing data or data that is not up to date at the subscriber level. Furthermore, having any of these components in a stopped state can lead to more severe problems if not corrected within a short time. The action required to improve on this default settings is in fact very simple. Adding a second schedule that is set as a Daily Reoccurring schedule which runs every 1 minute does the trick. SQL Server Agent’s scheduler module knows how to handle overlapping schedules so if the job is already being executed by another schedule it will not get executed again at the same time. So, in the event of a failure the failed job remains down for at most 60 seconds. Many DBAs are not aware of this capability and so search for more complex solutions such as having an additional dedicated job running an external code in VBS or another scripting language that detects replication jobs in a stopped state and starts them but there is no need to seek such external solutions when what is needed can be accomplished by T-SQL code. SQL Server Jobs Status In addition to the 1 minute schedule we also want to ensure that key components in the replication are enabled so I can search for those components by their Category, and set their status to enabled in case they are disabled, by executing the stored procedure MonitorEnableReplicationAgents. The jobs that I typically have handled are listed below but you may want to extend this, so below is the query to return all jobs along with their category. SELECT category_id, name FROM msdb.dbo.syscategories ORDER BY category_id; Distribution Cleanup LogReader Agent Distribution Agent Snapshot Agent Jobs By default when a publication is created, a snapshot agent job also gets created with a daily schedule. I see more organizations where the snapshot agent job does not need to be executed automatically by the SQL Server Agent  scheduler than organizations who   need a new snapshot generated automatically. To assure this setting is in place I created the stored procedure MonitorSnapshotAgentsSchedules which disables snapshot agent jobs and also deletes the job schedule. It is worth mentioning that when the publication property immediate_sync is turned off then the snapshot files are not created when the Snapshot agent is executed by the job. You control this property when the publication is created with a parameter called @immediate_sync passed to sp_addpublication and for an existing publication you can use sp_changepublication. Implementation The scripts assume the existence of a database named PerfDB. Steps: Run the scripts to create the stored procedures in the PerfDB database. Create a job that executes the stored procedures every hour. -- Verify that the 1_Minute schedule exists. EXEC PerfDB.dbo.MonitorReplicationAgentsSchedules @CategoryId = 10; /* Distribution */ EXEC PerfDB.dbo.MonitorReplicationAgentsSchedules @CategoryId = 13; /* LogReader */ -- Verify all replication agents are enabled. EXEC PerfDB.dbo.MonitorEnableReplicationAgents @CategoryId = 10; /* Distribution */ EXEC PerfDB.dbo.MonitorEnableReplicationAgents @CategoryId = 13; /* LogReader */ EXEC PerfDB.dbo.MonitorEnableReplicationAgents @CategoryId = 11; /* Distribution clean up */ -- Verify that Snapshot agents are disabled and have no schedule EXEC PerfDB.dbo.MonitorSnapshotAgentsSchedules; Want to read more of about replication? Check at my replication posts at my blog.

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• How can I suppress /etc/issue without losing error messages?

  - by Andy

  Is it possible to tell the ssh client to not print the connects of /etc/issue to stdout when connecting to a remote host, but to print out any other diagnostic (e.g. error) messages? Either using ssh -q or having LogLevel quiet in ~/.ssh/config suppresses the /etc/issue printing, but also turn off error messages. I've tried touching ~/.hushlogin as well - that stops /etc/motd being printed, but doesn't affect /etc/issue. The most obvious solution is just to remove /etc/issue, but company policy dictates the file be there with dire warnings about unauthorised access. This is non-negotiable. Unfortunately, I've got a bunch of scripts that run across quite a few hosts via ssh, and the log files are a) very large and b) full of legalese. Since quite a lot of stuff runs unattended, I don't want to lose any error messages that are printed.

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• Sharing authentication methods across API and web app

  - by Snixtor

  I'm wanting to share an authentication implementation across a web application, and web API. The web application will be ASP.NET (mostly MVC 4), the API will be mostly ASP.NET WEB API, though I anticipate it will also have a few custom modules or handlers. I want to: Share as much authentication implementation between the app and API as possible. Have the web application behave like forms authentication (attractive log-in page, logout option, redirect to / from login page when a request requires authentication / authorisation). Have API callers use something closer to standard HTTP (401 - Unauthorized, not 302 - Redirect). Provide client and server side logout mechanisms that don't require a change of password (so HTTP basic is out, since clients typically cache their credentials). The way I'm thinking of implementing this is using plain old ASP.NET forms authentication for the web application, and pushing another module into the stack (much like MADAM - Mixed Authentication Disposition ASP.NET Module). This module will look for some HTTP header (implementation specific) which indicates "caller is API". If the header "caller is API" is set, then the service will respond differently than standard ASP.NET forms authentication, it will: 401 instead of 302 on a request lacking authentication. Look for username + pass in a custom "Login" HTTP header, and return a FormsAuthentication ticket in a custom "FormsAuth" header. Look for FormsAuthentication ticket in a custom "FormsAuth" header. My question(s) are: Is there a framework for ASP.NET that already covers this scenario? Are there any glaring holes in this proposed implementation? My primary fear is a security risk that I can't see, but I'm similarly concerned that there may be something about such an implementation that will make it overly restrictive or clumsy to work with.

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• Programming as a minor

  - by Tomas Cokis

  Hello Everyone! I've never asked a question here at programmers, and for reasons which will become obvious later I've never answered one here, but I do poke around in short bursts. Anyway, I'm 15 right now, and I've been programming in C++ for 4 years, just working on my own projects that are aim so high as to never be finished. I've been working on a single project for the last year, and every 3 months, I add a new system into it. It might be a value tabling directory enabled log system, or a render system, or a class to load up xml files, whatever it is, I don't mind too much that the overall project (a 3d engine) isn't ever going to get finished, I just get some satisfaction from getting what I have done building and running. I don't know what I want to do when I grow up, although I suspect I'll go into some form of engineering, but I was interested in knowing if I do choose to go into a career as a developer, what kind of material I could look at to push myself up and get myself experience that might help my career later. I'm not talking about books in particular, I'm more interested in subjects areas that will get me access to good job opportunities, or that will give me a hand-up if I do computer science and software related courses at uni. One of the things I was thinking of doing was designing some of the logic gate components of a small computer - which I started briefly over the holidays, working out integer addition, subtraction and multiplication. That kind of stuff interests me, but is it really useful - or more useful then just more programming? But anyway, Any advice? Should I continue on my perpetual 3d engine? Are there any other projects or particular accomplishments that would help my education? Perhaps I should mention that I live in Perth, Australia, so local software companies are likely to be more scarce then usual.

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• Disable user_deny.db in Cyrus/imapd

  - by netmano

  We have a cyrus 2.4.12 on Debian, we use packages, rather than building each software ourselves. I am getting the this "log" constantly, a lot of, various users, and 8-10 times per user request: fetching user_deny.db entry for 'user123' I have searched for it, but haven't found a real solution, there were some patches for 2.3.xx, but we don't want ot build it, we prefer to use packages. Is there any solution to disable the user_deny.db at all. We don't need this feature. It wastes the CPU as disk.

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• Strange request - http://66.196.81.202/error/vote

  - by mplungjan

  Hi a friend of mine is asking about the request which can for example be found here: http://www.geoidee.ch/geodata/geoserver-2.0.0/logs/2010_11_23.request.log His original message: On a couple of hundred web sites worldwide, one of the 50 most popular "File not found" error 404 is caused by the following request: "GET http://66.196.81.202/error/vote HTTP/1.0" It originates from a user agent that purports to be an iPhone. The two requests that hit my servers appeared to originate near Frankfort, Germany. The IP address in the request is part of Yahoo although I doubt that Yahoo had any intentional part. fe1.buzz.vip.re1.yahoo.com The HTTP request has a host header 66.196.81.202 and a X-Forwarded-For of 96.6.99.16 and my IP address I expected to be able to do a Google search and find some kind of security bulletin on it, but I found nothing. It could just be that my search skills are deficient. Thanks for any pointers to what this could be

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• Catch Me If You Can

  - by Knut Vatsendvik

  Suppose you have a Proxy based Web Service using Oracle Service Bus. In a stage in the request pipeline,  you are using a Publish action to publish the incoming message to a JMS queue using a Business Service. What if the outbound transport provider throws an exception (outside of your pipeline)? Is your pipeline able to catch the error with an error handler?? This situation could occur because of a faulty connection, suspended queue, or some other reason. Here is the Request Pipeline in our simple test case. With an Error Handler added to the message flow containing a simple Log action. By default, the Publish action will invoke the service in a fire and forget fashion. Therefore any exception that occurs in the outbound transport will go unnoticed as shown in the following Invocation Trace. So what now? In a message flow, you can apply a Routing Options action to modify any or all of the following properties in the outbound request: URI, Quality of Service, Mode, Retry parameters, Message Priority. Now add the Routing Options action to the Request Action as shown below. Click the Routing Options to display its properties in the Properties View. Select the QoS option to set the Quality of Service element. Select Exactly Once to override the default setting, and Republish the project. The invocation will now block until the message is completely processed. Trying the same test case as earlier generates the following Invocation Trace showing that the Error Handler is now triggered.

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• Recover RAID 5 data after created new array instead of re-using

  - by Brigadieren

  Folks please help - I am a newb with a major headache at hand (perfect storm situation). I have a 3 1tb hdd on my ubuntu 11.04 configured as software raid 5. The data had been copied weekly onto another separate off the computer hard drive until that completely failed and was thrown away. A few days back we had a power outage and after rebooting my box wouldn't mount the raid. In my infinite wisdom I entered mdadm --create -f... command instead of mdadm --assemble and didn't notice the travesty that I had done until after. It started the array degraded and proceeded with building and syncing it which took ~10 hours. After I was back I saw that that the array is successfully up and running but the raid is not I mean the individual drives are partitioned (partition type f8 ) but the md0 device is not. Realizing in horror what I have done I am trying to find some solutions. I just pray that --create didn't overwrite entire content of the hard driver. Could someone PLEASE help me out with this - the data that's on the drive is very important and unique ~10 years of photos, docs, etc. Is it possible that by specifying the participating hard drives in wrong order can make mdadm overwrite them? when I do mdadm --examine --scan I get something like ARRAY /dev/md/0 metadata=1.2 UUID=f1b4084a:720b5712:6d03b9e9:43afe51b name=<hostname>:0 Interestingly enough name used to be 'raid' and not the host hame with :0 appended. Here is the 'sanitized' config entries: DEVICE /dev/sdf1 /dev/sde1 /dev/sdd1 CREATE owner=root group=disk mode=0660 auto=yes HOMEHOST <system> MAILADDR root ARRAY /dev/md0 metadata=1.2 name=tanserv:0 UUID=f1b4084a:720b5712:6d03b9e9:43afe51b Here is the output from mdstat cat /proc/mdstat Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] md0 : active raid5 sdd1[0] sdf1[3] sde1[1] 1953517568 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/3] [UUU] unused devices: <none> fdisk shows the following: fdisk -l Disk /dev/sda: 80.0 GB, 80026361856 bytes 255 heads, 63 sectors/track, 9729 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: 0x000bf62e Device Boot Start End Blocks Id System /dev/sda1 * 1 9443 75846656 83 Linux /dev/sda2 9443 9730 2301953 5 Extended /dev/sda5 9443 9730 2301952 82 Linux swap / Solaris Disk /dev/sdb: 750.2 GB, 750156374016 bytes 255 heads, 63 sectors/track, 91201 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: 0x000de8dd Device Boot Start End Blocks Id System /dev/sdb1 1 91201 732572001 8e Linux LVM Disk /dev/sdc: 500.1 GB, 500107862016 bytes 255 heads, 63 sectors/track, 60801 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: 0x00056a17 Device Boot Start End Blocks Id System /dev/sdc1 1 60801 488384001 8e Linux LVM Disk /dev/sdd: 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: 0x000ca948 Device Boot Start End Blocks Id System /dev/sdd1 1 121601 976760001 fd Linux raid autodetect Disk /dev/dm-0: 1250.3 GB, 1250254913536 bytes 255 heads, 63 sectors/track, 152001 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: 0x00000000 Disk /dev/dm-0 doesn't contain a valid partition table Disk /dev/sde: 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: 0x93a66687 Device Boot Start End Blocks Id System /dev/sde1 1 121601 976760001 fd Linux raid autodetect Disk /dev/sdf: 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: 0xe6edc059 Device Boot Start End Blocks Id System /dev/sdf1 1 121601 976760001 fd Linux raid autodetect Disk /dev/md0: 2000.4 GB, 2000401989632 bytes 2 heads, 4 sectors/track, 488379392 cylinders Units = cylinders of 8 * 512 = 4096 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 524288 bytes / 1048576 bytes Disk identifier: 0x00000000 Disk /dev/md0 doesn't contain a valid partition table Per suggestions I did clean up the superblocks and re-created the array with --assume-clean option but with no luck at all. Is there any tool that will help me to revive at least some of the data? Can someone tell me what and how the mdadm --create does when syncs to destroy the data so I can write a tool to un-do whatever was done? After the re-creating of the raid I run fsck.ext4 /dev/md0 and here is the output root@tanserv:/etc/mdadm# fsck.ext4 /dev/md0 e2fsck 1.41.14 (22-Dec-2010) fsck.ext4: Superblock invalid, trying backup blocks... fsck.ext4: Bad magic number in super-block while trying to open /dev/md0 The superblock could not be read or does not describe a correct ext2 filesystem. If the device is valid and it really contains an ext2 filesystem (and not swap or ufs or something else), then the superblock is corrupt, and you might try running e2fsck with an alternate superblock: e2fsck -b 8193 Per Shanes' suggestion I tried root@tanserv:/home/mushegh# mkfs.ext4 -n /dev/md0 mke2fs 1.41.14 (22-Dec-2010) Filesystem label= OS type: Linux Block size=4096 (log=2) Fragment size=4096 (log=2) Stride=128 blocks, Stripe width=256 blocks 122101760 inodes, 488379392 blocks 24418969 blocks (5.00%) reserved for the super user First data block=0 Maximum filesystem blocks=0 14905 block groups 32768 blocks per group, 32768 fragments per group 8192 inodes per group Superblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, 4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968, 102400000, 214990848 and run fsck.ext4 with every backup block but all returned the following: root@tanserv:/home/mushegh# fsck.ext4 -b 214990848 /dev/md0 e2fsck 1.41.14 (22-Dec-2010) fsck.ext4: Invalid argument while trying to open /dev/md0 The superblock could not be read or does not describe a correct ext2 filesystem. If the device is valid and it really contains an ext2 filesystem (and not swap or ufs or something else), then the superblock is corrupt, and you might try running e2fsck with an alternate superblock: e2fsck -b 8193 <device> Any suggestions? Regards!

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• How to restrict user to a particular folder in CentOS 6?

  - by Chris Demetriad

  I will need to create users so developers can log in and clone/pull/push changes/repositories from a github like platform. I've managed to add a user (using the root) to this CentOS machine; I now have this line in /etc/passwd: chris:x:32008:32010::/home/chris/public_html:/bin/bash ..and this in /etc/shadow: chris:$1$ruUeLtTu$onAY2hdu1J.UmHajEIlmR.:15385:0:99999:7::: I am able to SSH the server, I have permission to create a folder and I guess that should be enough. But I am able to see other files and folders outside public_html. How can I actually restrict the user to a particular directory so he can't "cd out" of his folder? Update: root@echo [~]# ls -ld /home/moove drwx--x--x 21 moove moove 4096 Mar 22 16:16 /home/moove/ root@echo [~]# ls -ld /home/moove/public_html drwxr-x--- 11 moove nobody 4096 Mar 27 11:29 /home/moove/public_html/ root@echo [~]# ls -ld /home/moove/public_html/dev drwxr-x--- 12 moove nobody 4096 Mar 27 14:47 /home/moove/public_html/dev/ root@echo [~]# ls -ld /home/moove/public_html/dev/arsenal drwxr-xr-x 3 arsenal moove 4096 Mar 27 14:53 /home/moove/public_html/dev/arsenal/

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• Printing from a Linux using an Acer Aspire Netbook

  - by JoelFan

  A friend asked me to check why their Linux Acer Aspire netbook can't print to their HP printer. When I plugged in the USB cable, the a "balloon" popped up on the netbook saying it was installing the printer. But the printing does not work. I was able to get into a Settings area and click on Print Test Page but nothing happened. If it was Ubuntu, I would go into the Log File Viewer, but I couldn't find that on whatever Linux flavor the Acer is running. I couldn't even figure out how to get to a terminal (shell) window. I tried searching the HP and Acer sites but nothing seems to apply to this issue.

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• Problem During Installation SQL Server 2005 on Windows 7

  - by mlife

   Yesterday I was trying to install SQL Server 2005 on windows 7. During installation a popup error dialog shown with this message: The SQL Server service failed to start. For more information, see the SQL Server Books Online topics, "How to: View SQL Server 2005 Setup Log Files" and "Starting SQL Server Manually. Here is the captured screen: But in books online there was no useful information! After some hours googling, I did not found any useful information and at 3 o'clock of midnight, I was scratching my head! Believe it, I attempted to install SQL Server more than 15 times with different manners (with command prompt & parameters and else). Eventually I found the resource of problem, that was "BitDefender Internet Security 2010"! After uninstalling BitDefender Internet Security, I installed SQL Server 2005 and then reinstalled BitDefender. Just that! Problem resolved. Conclusion: After installing a new version of windows and it's requirements (like IIS and language specifications & else), first install the SQL Server and the Visual Studio and then other applications.Hope be helpful.  

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• Using group policy preferences to push a file to C:\Windows on a restricted user.

  - by Fireshot

  We have a really old Video learning program that we need to run from the network for our students. However it uses Director Player 6.0 and the students get the error: "Unable to copy the driver file C:\Windows\xobglu16.dll to your Windows directory. Your disk may be full" Now the solution I've read is to copy the files manually to each machine and mark them read-only. I'm trying to do this via GPP, but the Event log is showing an Access is denied error. I believe it is because the student accounts do not have permission to c:\windows. Any ideas on a work around without using a script?

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• Apache 2 Symbolic link not allowed or link target not accessible

  - by djechelon

  While the title of this question matches an already asked question, in my case I already set Options +FollowSymLinks. The setup is the following: my hosting setup includes htdocs/ directory that is the default document root for HTTP websites and htdocs-secure that is for HTTPS. They are meant for sites that need a different HTTPS version. In case both share the same files I create a link from htdocs-secure to htdocs by ln -s htdocs htdocs-secure but here comes the problem! Log still says Symbolic link not allowed or link target not accessible: /path/to/htdocs-secure Vhost fragment Header always set Strict-Transport-Security "max-age=500" DocumentRoot /path/to/htdocs-secure <Directory "/path/to/htdocs-secure"> allow from all Options +FollowSymLinks </Directory> I think it's a correct setup. The HTTP version of the site is accessible, so it doesn't look like a permission problem. How to fix this? [Add] other info: I use MPM-itk and I set AssignUserId to the owner/group of both the directories

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• Why Oracle Data Integrator for Big Data?

  - by Mala Narasimharajan

  Big Data is everywhere these days - but what exactly is it? It’s data that comes from a multitude of sources – not only structured data, but unstructured data as well.  The sheer volume of data is mindboggling – here are a few examples of big data: climate information collected from sensors, social media information, digital pictures, log files, online video files, medical records or online transaction records.  These are just a few examples of what constitutes big data.   Embedded in big data is tremendous value and being able to manipulate, load, transform and analyze big data is key to enhancing productivity and competitiveness.  The value of big data lies in its propensity for greater in-depth analysis and data segmentation -- in turn giving companies detailed information on product performance, customer preferences and inventory.  Furthermore, by being able to store and create more data in digital form, “big data can unlock significant value by making information transparent and usable at much higher frequency." (McKinsey Global Institute, May 2011) Oracle's flagship product for bulk data movement and transformation, Oracle Data Integrator, is a critical component of Oracle’s Big Data strategy. ODI provides automation, bulk loading, and validation and transformation capabilities for Big Data while minimizing the complexities of using Hadoop.  Specifically, the advantages of ODI in a Big Data scenario are due to pre-built Knowledge Modules that drive processing in Hadoop. This leverages the graphical UI to load and unload data from Hadoop, perform data validations and create mapping expressions for transformations.  The Knowledge Modules provide a key jump-start and eliminate a significant amount of Hadoop development.  Using Oracle Data Integrator together with Oracle Big Data Connectors, you can simplify the complexities of mapping, accessing, and loading big data (via NoSQL or HDFS) but also correlating your enterprise data – this correlation may require integrating across heterogeneous and standards-based environments, connecting to Oracle Exadata, or sourcing via a big data platform such as Oracle Big Data Appliance. To learn more about Oracle Data Integration and Big Data, download our resource kit to see the latest in whitepapers, webinars, downloads, and more… or go to our website on www.oracle.com/bigdata

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• Apache 2.2.16: client denied by server configuration

  - by Viktor

  I have problem with my server configuration. I use Apache 2.216, PHP 5.3.3 and wordpress 3.4.2 with Shopperpress. Time to time I receive error "client denied by server configuration: path/to/file" in apache log file. It is path to _tbs.php file, but it is not problem in rights of file, because this file is called 12 times on page for getting thumbs of photos and there is error only several times. I think that it has no connection to concrete photo, because once this photo is displayed corectly and next time same photo produce error. Do you have any idea what can be reason? Thank you for all advices. Viktor

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• Deploying war files in tomcat6

  - by user3215

  I am using tomcat5.5 for a long on ubuntu servers 8.10 and 9.10 and '/usr/share/tomcat/webapps/' is the path where I place my .war files and access them on the browser over network. On a sytem I've installed tomcat6 and I'm failing to find that where do I place my .war file of tomcat6's webapps. I checked deploying war under /var/lib/tomcat6/webapps/ and the war file is extracted and I think this should be the location but I could not access the page when I tried http://serverip:8080/myapp. I could access the default page properly when I navigate to http://serverip:8080. The same war file is working fine on tomcat servers which were not installed from apt repository. Log Messages: INFO: Stopping Coyote HTTP/1.1 on http-8080 2 Dec, 2010 10:06:29 AM org.apache.coyote.http11.Http11Protocol init INFO: Initializing Coyote HTTP/1.1 on http-8080 2 Dec, 2010 10:06:29 AM org.apache.catalina.startup.Catalina load INFO: Initialization processed in 523 ms 2 Dec, 2010 10:06:29 AM org.apache.catalina.core.StandardService start INFO: Starting service Catalina 2 Dec, 2010 10:06:29 AM org.apache.catalina.core.StandardEngine start INFO: Starting Servlet Engine: Apache Tomcat/6.0.20 2 Dec, 2010 10:06:30 AM org.apache.catalina.startup.HostConfig deployWAR INFO: Deploying web application archive myapp.war 2 Dec, 2010 10:06:32 AM org.apache.catalina.core.StandardContext start SEVERE: Error listenerStart 2 Dec, 2010 10:06:32 AM org.apache.catalina.core.StandardContext start SEVERE: Context [/myapp] startup failed due to previous errors 2 Dec, 2010 10:06:32 AM org.apache.coyote.http11.Http11Protocol start INFO: Starting Coyote HTTP/1.1 on http-8080 2 Dec, 2010 10:06:32 AM org.apache.catalina.startup.Catalina start INFO: Server startup in 3110 ms 2 Dec, 2010 10:06:39 AM org.apache.catalina.core.StandardContext start SEVERE: Error listenerStart 2 Dec, 2010 10:06:39 AM org.apache.catalina.core.StandardContext start SEVERE: Context [/myapp] startup failed due to previous error Any help?

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• Are there any problems migrating users from OSX 10.4.11 server to 10.6.6. server using WGM?

  - by Geoff Hardman

  I have just set up a new Mac server running 10.6.6. Installation went smoothly and all appears ok. Can create a new user through WGM and logon to the server from one of our local client systems. Imported the old users from the 10.4 system using WGM but the new system will not create home directories for these users and will not let them log on. I have read that there are issues using this method but can not find any detail as to why. Not wishing to recreate over 350 users from scratch I am looking for an easier solution. Can anyone help? The new server is 10.6.6. We use Open Directory and AFP. The paths are the same as the old server.

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• How do I enable SELinux when booting from a CD/DVD?

  - by JeffG

  I have a bootable DVD which boots the same Kernel as the Hard Drive (which uses SELinux). I have copied /etc/selinux and all the kernel modules to my ramdisk, and have tried both selinux=1 and selinux 1 as Kernel boot parameters. After the system boots, I check dmesg: % dmesg | grep -i selinux Kernel command line: initrd=idrd.img ramdisk_size=110476 selinux=1 SELinux: Initializing. SELinux: Starting in permissive mode selinux_register_security: Registering secondary module capability SElinux: Registering netfilter hooks But SELinux isn't running: % /usr/sbin/getenforce Disabled % /usr/sbin/setenforce 1 /usr/sbin/setenforce: SELinux is disabled /var/log/messages does not hold any clues. /proc/kmsg also has nothing

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• What's constitute an entry on the IPTables and how to find out which client it is originated from

  - by cbd

  I have a Billion BiPac 7700N Modem/Router/Access Point and I connect another router (TP-Link TL-WR1043ND) in wan-bypass mode to extend the wireless coverage. Lately, I noticed that the connection through TP-Link has been dropping out quite regularly. Having read some posts on the Internet, I checked system log on 7700N and found that there are many "nf_conntract: expectation table full" errors, which I suppose the iptables are full. My questions: What does constitute an entry on the iptable? Is it a client or a connection (which means one client can have multiple connections) How could I find out where are those connections originated from? Note: Many reported that the issue is usually related to having torrents running but I don't have any torrents running. Thank you.

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• #mvvmlight V4 update for Win8 RTM

  - by Laurent Bugnion

  With Windows 8 RTM out of the doors (at least for some of us), it was also time to create an update to MVVM Light. I selected the V4 RTM to do this (V4.0.23).This RTM version was released a few weeks ago with no much bells and whistles because I was just too busy to write much about it. Now after some vacation, I will resume blogging on all my favorite topics including of course MVVM Light. Upgrade Upgrading the installations should not require an ununistall, so try to simply run the MSI downloaded from the Download section at http://mvvmlight.codeplex.com/. Should you encounter any issue, try to uninstall the old version first following the steps at http://galasoft.ch/mvvm/cleaning/. Upgrading current apps from Win8 RP to Win8 RTM I didn’t recompile the assemblies of MVVM Light, so if you had a version running with V4.0.23 on Windows 8 RP, you should be able to use the same DLLs on Windows 8 RTM. If you were using earlier versions however, I would recommend doing an upgrade. I noticed a warning regarding the signing certificate. It is due to the PFX key which appears to be outdated after the upgrade to Windows 8 RTM. I solved this warning by replacing the old PFX key with a new one I copied from a new project. The warning did not cause the build to fail though. About MVVM Light V4 RTM The RTM is finalizing quite a lot of issues. The change log is available at http://galasoft.ch/mvvm/installing/changes/. There are some issues that are either still open or that popped up since then, and I am working on V4.1 to be released in the next few weeks. In addition to that, I have plans to support Windows Phone 8 (when it comes) and have a nice list of ideas for V5 with a few new components. Thanks again for your continuous support of MVVM Light! Laurent   Laurent Bugnion (GalaSoft) Subscribe | Twitter | Facebook | Flickr | LinkedIn

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