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• Tip: Tip: Using Autoexpect to Create Interactive Scripts in Linux

  Scripting interactive operations can be a challenge, but the expect command is tailor-made for this. Juliet Kemp offers some tips on using this handy scripting tool.

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• vpnc Connects Linux and Cisco VPNs

  Linux users have a notoriously hard time with Cisco's VPN client. With vpnc, a little effort up front yields easy connections via GNOME NetworkManager or the command line.

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• Setup Guide for updating local system and the repository with the incremental Solaris 11.1 SRU

  - by Gurubalan

  This guide covers the steps to implement the following setup. I. Updating the local system from Solaris 11.1 to Solaris 11.1 SRU 16.5II. Setting up local system as an IPS Repository Server (HTTP interface)III. Updating the local repository with the incremental Solaris 11.1 SRU 16.5I. Updating the local system from Solaris 11.1 to Solaris 11.1 SRU 16.5We assume that the local system is currently installed with Solaris 11.1 GA and the system doesn't have internet connectivity.What I have:1. Two parts of full repo iso files downloaded from http://www.oracle.com/technetwork/server-storage/solaris11/downloads/index.html. Both files are concatenated to a single file using the following command. $ cat sol-11_1-repo-full.iso-a sol-11_1-repo-full.iso-b > sol-11_1-repo-full.iso I suggest to verify the downloaded file against its md5checksum value [http://download.oracle.com/otn/solaris/11_1/md5sum.txt] using the following command digest -a md5 <file-name>  // the output of this command should match the original checksum value for that file.2. Incremental repo sol-11_1_16_5_0-incr-repo.iso downloaded from MOS [Patch 18269379: ORACLE SOLARIS 11.1.16.5.0 REPO ISO IMAGE (SPARC/X86 (64-BIT)]. You can get the checksum value of incremental repo iso by clicking the check box "show digest details" when you download the file.3. The local system IP is 192.168.10.10 & port 81 is reserved for repo serverPlease note that this repo file (either full or incremental) is common for both SPARC and X86(64BIT).Steps to update the local system: 1. #mounting s11.1 full repo iso to mnt        $ mount -F hsfs /soft/sol-11_1-repo-full.iso /mnt 2. Setting the pkg publisher to full repo source         $ pkg set-publisher -g file:///mnt/repo solaris 3. Perform the update of the packages.        $ pkg updateII. Setting up local system (Oracle Solaris 11.1) as an IPS Repository Server(HTTP interface):Please note that we have already mounted the full repo iso at /mnt    1. # copying /mnt permanently to the disk location at /s11.1        #zfs create -o atime=off -o mountpoint=/s11.1 rpool/s11.1        #rsync -aP /mnt/* /s11.1     2. #unmounting mnt         #umount /mnt3. To allow clients to access the local repository via HTTP, enable the application/pkg/server Service Management Facility (SMF) service.        svccfg -s application/pkg/server setprop pkg/inst_root=<data_source>/repo        eg: $svccfg -s application/pkg/server setprop pkg/inst_root=/s11.1/repo4. Setting port# to 81      svccfg -s application/pkg/server setprop pkg/port=<port_number>      eg: svccfg -s application/pkg/server setprop pkg/port="81"5a. Enable the pkg/server service (if the service is disabled)     $svcs pkg/server     STATE          STIME    FMRI     disabled        19:55:03 svc:/application/pkg/server:default      $svcadm enable pkg/server5b. Refresh/Restart the service, if it is already online       $svcadm refresh application/pkg/server       $svcadm restart application/pkg/server6. Setting pkg publisher on repo server and repo clients:      pkg set-publisher -G '*' -g http://<ip>:<port> solaris      eg: $pkg set-publisher -G '*' -g 'http://192.168.10.10:81' solaris7. Verify the Solaris 11.1 version from the repository         $pkgrepo list -s http://192.168.10.10:81 | grep entire         solaris   entire     0.5.11,5.11-0.175.1.0.0.24.2:20120919T190135Z You will have multiple row entries if the repository is setup with incremental SRUs.III. Updating the local repository with the incremental Solaris 11.1 SRU 16.51. #mounting s11.1 incremental SRU repo iso to mnt        $ mount -F hsfs <full_path_to>/sol-11_1_sruN_bldnum_respinnum-incr-repo.iso  /mnt        $ mount -F hsfs /soft/sol-11_1_16_5_0-incr-repo.iso /mnt2. Updating the local repository        $pkgrecv -s  /mnt/repo -d /s11.1/repo '*'3. Building a Search Index    $pkgrepo -s /s11.1/repo refresh     Initiating repository refresh.4. Refresh/Restart the service       $svcadm refresh svc:/application/pkg/server       $svcadm restart svc:/application/pkg/server5. Verify the repo has the incremental SRU as well.       # pkgrepo list -s http://192.168.10.10:81 | grep entire        solaris   entire      0.5.11,5.11-0.175.1.16.0.5.0:20140218T165248Z       solaris   entire      0.5.11,5.11-0.175.1.0.0.24.2:20120919T190135Z

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• Self-signed certificates for a known community

  - by costlow

  Recently announced changes scheduled for Java 7 update 51 (January 2014) have established that the default security slider will require code signatures and the Permissions Manifest attribute. Code signatures are a common practice recommended in the industry because they help determine that the code your computer will run is the same code that the publisher created. This post is written to help users that need to use self-signed certificates without involving a public Certificate Authority. The role of self-signed certificates within a known community You may still use self-signed certificates within a known community. The difference between self-signed and purchased-from-CA is that your users must import your self-signed certificate to indicate that it is valid, whereas Certificate Authorities are already trusted by default. This works for known communities where people will trust that my certificate is mine, but does not scale widely where I cannot actually contact or know the systems that will need to trust my certificate. Public Certificate Authorities are widely trusted already because they abide by many different requirements and frequent checks. An example would be students in a university class sharing their public certificates on a mailing list or web page, employees publishing on the intranet, or a system administrator rolling certificates out to end-users. Managed machines help this because you can automate the rollout, but they are not required -- the major point simply that people will trust and import your certificate. How to distribute self-signed certificates for a known community There are several steps required to distribute a self-signed certificate to users so that they will properly trust it. These steps are: Creating a public/private key pair for signing. Exporting your public certificate for others Importing your certificate onto machines that should trust you Verify work on a different machine Creating a public/private key pair for signing Having a public/private key pair will give you the ability both to sign items yourself and issue a Certificate Signing Request (CSR) to a certificate authority. Create your public/private key pair by following the instructions for creating key pairs.Every Certificate Authority that I looked at provided similar instructions, but for the sake of cohesiveness I will include the commands that I used here: Generate the key pair.keytool -genkeypair -alias erikcostlow -keyalg EC -keysize 571 -validity 730 -keystore javakeystore_keepsecret.jks Provide a good password for this file. The alias "erikcostlow" is my name and therefore easy to remember. Substitute your name of something like "mykey." The sigalg of EC (Elliptical Curve) and keysize of 571 will give your key a good strong lifetime. All keys are set to expire. Two years or 730 days is a reasonable compromise between not-long-enough and too-long. Most public Certificate Authorities will sign something for one to five years. You will be placing your keys in javakeystore_keepsecret.jks -- this file will contain private keys and therefore should not be shared. If someone else gets these private keys, they can impersonate your signature. Please be cautious about automated cloud backup systems and private key stores. Answer all the questions. It is important to provide good answers because you will stick with them for the "-validity" days that you specified above.What is your first and last name?  [Unknown]:  First LastWhat is the name of your organizational unit?  [Unknown]:  Line of BusinessWhat is the name of your organization?  [Unknown]:  MyCompanyWhat is the name of your City or Locality?  [Unknown]:  City NameWhat is the name of your State or Province?  [Unknown]:  CAWhat is the two-letter country code for this unit?  [Unknown]:  USIs CN=First Last, OU=Line of Business, O=MyCompany, L=City, ST=CA, C=US correct?  [no]:  yesEnter key password for <erikcostlow>        (RETURN if same as keystore password): Verify your work:keytool -list -keystore javakeystore_keepsecret.jksYou should see your new key pair. Exporting your public certificate for others Public Key Infrastructure relies on two simple concepts: the public key may be made public and the private key must be private. By exporting your public certificate, you are able to share it with others who can then import the certificate to trust you. keytool -exportcert -keystore javakeystore_keepsecret.jks -alias erikcostlow -file erikcostlow.cer To verify this, you can open the .cer file by double-clicking it on most operating systems. It should show the information that you entered during the creation prompts. This is the file that you will share with others. They will use this certificate to prove that artifacts signed by this certificate came from you. If you do not manage machines directly, place the certificate file on an area that people within the known community should trust, such as an intranet page. Import the certificate onto machines that should trust you In order to trust the certificate, people within your known network must import your certificate into their keystores. The first step is to verify that the certificate is actually yours, which can be done through any band: email, phone, in-person, etc. Known networks can usually do this Determine the right keystore: For an individual user looking to trust another, the correct file is within that user’s directory.e.g. USER_HOME\AppData\LocalLow\Sun\Java\Deployment\security\trusted.certs For system-wide installations, Java’s Certificate Authorities are in JAVA_HOMEe.g. C:\Program Files\Java\jre8\lib\security\cacerts File paths for Mac and Linux are included in the link above. Follow the instructions to import the certificate into the keystore. keytool -importcert -keystore THEKEYSTOREFROMABOVE -alias erikcostlow -file erikcostlow.cer In this case, I am still using my name for the alias because it’s easy for me to remember. You may also use an alias of your company name. Scaling distribution of the import The easiest way to apply your certificate across many machines is to just push the .certs or cacerts file onto them. When doing this, watch out for any changes that people would have made to this file on their machines. Trusted.certs: When publishing into user directories, your file will overwrite any keys that the user has added since last update. CACerts: It is best to re-run the import command with each installation rather than just overwriting the file. If you just keep the same cacerts file between upgrades, you will overwrite any CAs that have been added or removed. By re-importing, you stay up to date with changes. Verify work on a different machine Verification is a way of checking on the client machine to ensure that it properly trusts signed artifacts after you have added your signing certificate. Many people have started using deployment rule sets. You can validate the deployment rule set by: Create and sign the deployment rule set on the computer that holds the private key. Copy the deployment rule set on to the different machine where you have imported the signing certificate. Verify that the Java Control Panel’s security tab shows your deployment rule set. Verifying an individual JAR file or multiple JAR files You can test a certificate chain by using the jarsigner command. jarsigner -verify filename.jar If the output does not say "jar verified" then run the following command to see why: jarsigner -verify -verbose -certs filename.jar Check the output for the term “CertPath not validated.”

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• installing Oracle Database 10g XE Server in Ubuntu 11.04, "E: Unable to locate package oracle-xe"

  - by Nguyen Phi Vu

  I have read many posts for installing Oracle Database 10g XE Server in Ubuntu, such as this But I get an error: E: Unable to locate package oracle-xe when execute the command sudo apt-get install oracle-xe At the previous step (sudo apt-get update), it also notices that E: Some index files failed to download. They have been ignored, or old ones used instead. Did any one meet and solve this problem? I have searched for this problem but got no proper answer.

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• Did I lost my RAID again?

  - by BarsMonster

  Hi! A little history: 2 years ago I was really excited to find out that mdadm is so powerful so it even can reshape arrays so you can start with a smaller array and the grow it as you need. I've bought 3x1Tb drives and made RAID-5. It was fine for a year. Then I bought 2x more, and tried to reshape to RAID-6 out of 5 drives, and due to some mess with superblock versions, lost all content. Had to rebuild it from scratch, but 2Tb of data were gone. Yesterday I bought 2 more drives, and this time I had everything: properly built array, UPS. I've disabled write intent map, added 2 new drives as a spare and run a command to grow array to 7-disk. It started working, but speed was ridiculously slow, ~100kb/sec. AFter processing first 37Mb at such an amasing speed, one of old HDDs fails. I properly shutdown PC and disconnected failed drive. After bootup it appeared it recreated intent map as it was still in mdadm config, so I removed it from config and rebooted again. Now all I see is that all mdadm processes deadlocks, and don't do anything. PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 1937 root 20 0 12992 608 444 D 0 0.1 0:00.00 mdadm 2283 root 20 0 12992 852 704 D 0 0.1 0:00.01 mdadm 2287 root 20 0 0 0 0 D 0 0.0 0:00.01 md0_reshape 2288 root 18 -2 12992 820 676 D 0 0.1 0:00.01 mdadm And all I see in mdstat is: $ cat /proc/mdstat Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] md0 : active raid6 sdb1[1] sdg1[4] sdf1[7] sde1[6] sdd1[0] sdc1[5] 2929683456 blocks super 1.2 level 6, 1024k chunk, algorithm 2 [7/6] [UU_UUUU] [>....................] reshape = 0.0% (37888/976561152) finish=567604147.2min speed=0K/sec I've already tried mdadm 2.6.7, 3.1.4 and 3.2 - nothing helps. Did I lost my data again? Any suggestions how can I make it work? OS is Ubuntu Server 10.04.2... PS. Needless to say that data is unaccessible - I cannot mount /dev/md0 as save the most valuable data. You can see my disappointment - the very specific thing I was excited about failed twice taking 5Tb of my data with it.

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• Make alsamixer changes permanent

  - by Mauricio Andrés

  I have installed ubuntu GNOME 14.04 in my macbook Pro 13" mid 2012, and something is wrong with the headphones jack, a red led is on and it just can be turned off with the alsamixer command and muting a special section (I'm sorry for not remember the setting, I'm on OS X for work reasons) I already know how to fix it, but I want to know how to save the setting in the alsamixer, because with every reboot the red led is back. Thanks for the help.

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• Can't return to stock Android

  - by kurt

  Whenever I try and uncompress the tar file, I get this: tar (child): nakasi-jro03d-factory-e102ba72.tg: Cannot open: No such file or directory tar (child): Error is not recoverable: exiting now tar: Child returned status 2 tar: Error is not recoverable: exiting now I'm fairly new to Ubuntu. So I'm pretty sure that's my fault. So I just compress it manually using the GUI. But when I try to flash it, I get sudo: ./flash-all.sh: command not found Please help.

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• How to run php with Eclipse and XAMPP?

  - by Patterson

  I'm using eclipse kepler on ubuntu 14.04, and I want to know how do I run a php project? I already installed the plugin in eclipse for php and when command run the project, the page does not load in the browser. I know this is why I have to save the php pages in the xampp directory: / opt / lampp / htdocs. My PHP files are in the eclipse workspace in my home folder, how can I run from the workspace if that is possible?

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• @CodeStock 2012 Review: Jay Harris ( @jayharris ) - XCopy is Dead: .Net Deployment Strategies that Work

  XCopy is Dead: .Net Deployment Strategies that WorkSpeaker: Jay HarrisTwitter: @jayharrisBlog: www.cptloadtest.com This talk focused on new technologies built in to deployment packaging through Visual Studios 2010.  Jay showed various methodologies in deploying web sites, and focused on features specifically for Visual Studios 2010. He covered transforming config files based on environmental constraints, the creation of deployment packages, and deploying packages via command line or importing into IIS 7.

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• SQL Server PowerShell Provider follows the Version of PowerShell on the Host and other errata

  - by BuckWoody

  There may be some misunderstanding on how the PowerShell Provider for SQL Server works. I’ve written an article or two explaining that you can use PowerShell with SQL Server, without having the SQL Server 2008 (or higher) provider around. After all, PowerShell just uses .NET, and SQL Server “Server Management Objects” or SMO listen to that interface as well. In SQL Server 2008 and higher we created a “MiniShell” for PowerShell that gives you the ability to treat a SQL Server Instance as a drive (called a “Provider” or path or drive) and a few commands (called command-lets). Using these two simple constructs you can move around SQL Server quickly and work with the objects it holds. I read the other day where someone stated that we had “re-compiled” PowerShell, so that you would have version 1.0 from SQL Server and 2.0 on your new server. Not so! Drop to a SQLPS prompt and a PowerShell prompt and type this in each: $PSVersionTable They should return the same value. You can think of a MiniShell as simply a compiled “profile” that gives you those providers and command-lets automatically – that’s all. In fact, you can load the SMO libraries yourself without the SQL Server 2008 Provider anywhere in sight. I do this all the time, since the MiniShell also has other restrictions. Also remember that if you run a PowerShell script as a SQL Agent Job step type (in 2008 and higher) that you’re running under the context of the account that starts Agent – I think most folks know this, but it’s good to keep in mind. There’s a re-written section of Books Online that goes over working with this very nicely – also covers the question “How to I connect to another server using the SQL Server PowerShell Provider” (hint: It’s just CD) and “How do I load all the SMO stuff if I don’t want to use the Provider” and more. Be sure and check out the note at the bottom that explains the firewall exceptions you’ll need to enable to CD to that remote server. Here’s that link: http://msdn.microsoft.com/en-us/library/cc281947.aspx Share this post: email it! | bookmark it! | digg it! | reddit! | kick it! | live it!

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• How do I install drivers for the Atheros AR8161 Ethernet controller?

  - by Jessica Burnett

  I have installed Ubuntu 12.04-64 bit on my Lenovo IdeaPad laptop, and the wired Ethernet (LAN) connection doesn't work. Running the lspci -vv | grep Atheros command from the terminal shows me I have the AR8161 Gigabit Ethernet controller: 02:00.0 Ethernet controller: Atheros Communications Inc. AR8161 Gigabit Ethernet (rev 08) This looks like a new product whose drivers are not built into Ubuntu. How do I install drivers to get the AR8161 working?

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• Announcing: General Availability of Demantra 7.3.1.4!

  - by user702295

  Announcing: General Availability of Demantra 7.3.1.4! This new release brings important usability upgrades and key requested customer enhancements. Key features released in Demantra 7.3.1.4: - Improved user interface - Improved mobile support - Embed Demantra-Anywhere in Advanced Planning Command Center - Aggregate work orders for Asset Intensive Planning Additionally: - Demantra 7.3.1.4 is certified with VCP 12.1.3.8 only. Availability via patch 14405087.

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• how to start LXDE session automatically after tightvncserver starts to make me able see desktop when connecting to the host via vncclient?

  - by Oleksandr Dudchenko

  I have system which is equipped with Intel Celeron processor 1.1 GHz s370 with 384 Mb of RAM on Intel d815egew motherboard which supports wake-on-lan function. I want to use such a PC for Internet sharing to the local network. Also this PC is a DHCP+DNS server as well as router/gateway. Based on above I decided to install Lubuntu as it is lightweight system. I installed Lubuntu 10.04.4 LTS from alternate ISO. System has no auto login. System boots and has acceptable performance. Host PC has onboard 4 network adapters: eth0 – ethernet controller which is used for Local Network connections. Has static address 10.0.0.1 eth1 – ethernet controller which is not used and not configured so far, I plan to connect printer here later on. eth2 - ethernet controller which is used to connect to Internet, which we plan to share for the local network wlan0 – wireless controller, it is used in role of access poit for local Network and has address 10.0.0.2 We want to control our gateway remotely. So, we need to be able to power it on remotely. To allow this I’ve done the following things: $ cd /etc/init.d/ made a new file with command $ sudo vim wakeonlanconfig Wrote the following lines to the newly created file, saved and closed it #!/bin/bash ethtool -s eth0 wol g ethtool -s eth2 wol g exit Made the abovementioned file executable $ sudo chmod a+x wakeonlanconfig Then included it into autostart sequence during boot. $ sudo update-rc.d -f wakeonlanconfig defaults after system reboot we will be able to poweron system remotely. Than we need to have a possibility to connect remotely to the host via SSH and VNC. So, I installed following packets with the following commands: $ sudo apt-get update $ sudo apt-get install openssh-server tightvncserver Add ssh daemon into autostart sequence during boot. $ sudo update-rc.d -f ssh defaults Power off the host PC $ sudo halt Then I went to remote place, send magic paket and powered the Host up. System started... And I connected to the host via Putty from remote system under Windows. Than logged in and run the command to start vnc server. $ tightvncserver -geometry 800x600 -depth 16 :2 VNC server successfully started and I got message like follows. New 'X' desktop is gateway:2 Starting applications specified in /home/dolv/.vnc/xstartup Log file is /home/dolv/.vnc/gateway:2.log Using UltraVNC Viewer programm under windows I connected to the host's vnc server, enterd the password and.... sow only mouse cursor in form of cross on a grey background of 800x600 dots, no desktop. Here is my .vnc/xstartup file #!/bin/sh xrdb $HOME/.Xresources xsetroot -solid grey #x-terminal-emulator -geometry 80x24+10+10 -ls -title "$VNCDESKTOP Desktop" & #x-window-manager & # Fix to make GNOME work export XKL_XMODMAP_DISABLE=1 /etc/X11/Xsession The Question: What I have to change and where to make LXDE session start automatically after tightvncserver starts?

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• Commandline Purge in AS11

  - by Dheeraj Kumar

  AS11 - B2B offering consists of numerous features that have been made available via commandline approach. Most of these are supplement to the already available User Interface based approach. One such is purging of runtime data. The commandline purge option enables the users to purge the runtime data, based on various criteria. This is an ANT based command, provides the flexibility to selectively set the criteria to purge the runtime data. Providing the command line option also enables the administrator to purge in bulk, without visiting the B2B UI, which can also be used for automation purpose By default archival is turned on for purge activity. As a pre-requisite, the respective folder needs to be configured in database with the proper permission. When no filename is provided for archived data, the sysdate will be considered for filename. Below are the various options to purge the runtime data Normal 0 Option ANT option   Message state -Dmsgstate   Date range -Dfromdate,  -Dtodate Format : dd/mm/yyyy hh:mm AM/PM Trading partner -Dtp   Direction -Ddirection   Message Type -Dmsgtype   Agreement Name -Dagreement   IdType/ value -Didtype,  -Didvalue   Archive -Darchive True/false By default true Archive file name -Darchivename File name (optional), will be used when archive is set to true. Normal 0 Note: When using -Darchivename the value must be a unique file name. An existing file name used with -Darchivename throws an exception v\:* {behavior:url(#default#VML);} o\:* {behavior:url(#default#VML);} w\:* {behavior:url(#default#VML);} .shape {behavior:url(#default#VML);} Normal 0 Below are the few of ant commands and various options.   Purge based on date range and message state: Normal 0 ant -f ant-b2b-util.xml b2bpurge -Dmode=RT -Dfromdate="19/12/2009 1:04 AM" -Dtodate="19/12/2009 1:05 AM" -Dmsgstate=MSG_COMPLETE -Darchivename="filename.dmp"  Purge based on direction: Normal 0 ant -f ant-b2b-util.xml b2bpurge -Dmode=RT -Ddirection="OUTBOUND" Normal 0 Purge based on agreement Name: Normal 0 ant -f ant-b2b-util.xml b2bpurge -Dmode=RT -Dagreement="agreement_name" Normal 0 Purge based on Trading partner Name: Normal 0 ant -f ant-b2b-util.xml b2bpurge -Dmode=RT -Dtp=GlobalChips Normal 0 Purge based on Message State: Normal 0 ant -f ant-b2b-util.xml b2bpurge -Dmode=RT -Dmsgstate="MSG_COMPLETE" Normal 0 ant -f ant-b2b-util.xml b2bpurge -Dmode=RT -Ddirection="OUTBOUND" -Dmsgstate="MSG_COMPLETE"

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• installing ntop in ubuntu 12.4

  - by George Ninan

  When i try to start the ntop i get the following error - Secure Connection Failed An error occurred during a connection to 192.168.166.229:3000. SSL received a record that exceeded the maximum permissible length. (Error code: ssl_error_rx_record_too_long) The page you are trying to view cannot be shown because the authenticity of the received data could not be verified. Please contact the website owners to inform them of this problem. Alternatively, use the command found in the help menu to report this broken site. Please advice

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• Acer Wireless Network not working

  - by pico

  I installed Ubuntu 12.04 64 Bit desktop version in acer AspireE1-470. Everything work great except Wireless and touch pad. When i run additional driver there nothing to activate and when i run "rfkill list" it's show 0: hci0:bluetooth Soft blocked: yes Hard Blocked: no 1: acer-wireless: Wireless Lan Soft blocked: no Hard blocked: no I don't know too much command in linux and i hv no i ieda hot to work wireless and touch-pad

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• Get to Know MySQL Workbench

  <b>Ghacks:</b> "Although MySQL works exceptionally well from the command line (it's not as hard as one would think), having a solid GUI tool just opens the user up to learning more powerful tasks and getting more work done faster."

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• Merge replication stopping without errors in SQL 2008 R2

  - by Rob Farley

  A non-SQL MVP friend of mine, who also happens to be a client, asked me for some help again last week. I was planning on writing this up even before Rob Volk (@sql_r) listed his T-SQL Tuesday topic for this month. Earlier in the year, I (well, LobsterPot Solutions, although I’d been the person mostly involved) had helped out with a merge replication problem. The Merge Agent on the subscriber was just stopping every time, shortly after it started. With no errors anywhere – not in the Windows Event Log, the SQL Agent logs, not anywhere. We’d managed to get the system working again, but didn’t have a good reason about what had happened, and last week, the problem occurred again. I asked him about writing up the experience in a blog post, largely because of the red herrings that we encountered. It was an interesting experience for me, also because I didn’t end up touching my computer the whole time – just tapping on my phone via Twitter and Live Msgr. You see, the thing with replication is that a useful troubleshooting option is to reinitialise the thing. We’d done that last time, and it had started to work again – eventually. I say eventually, because the link being used between the sites is relatively slow, and it took a long while for the initialisation to finish. Meanwhile, we’d been doing some investigation into what the problem could be, and were suitably pleased when the problem disappeared. So I got a message saying that a replication problem had occurred again. Reinitialising wasn’t going to be an option this time either. In this scenario, the subscriber having the problem happened to be in a different domain to the publisher. The other subscribers (within the domain) were fine, just this one in a different domain had the problem. Part of the problem seemed to be a log file that wasn’t being backed up properly. They’d been trying to back up to a backup device that had a corruption, and the log file was growing. Turned out, this wasn’t related to the problem, but of course, any time you’re troubleshooting and you see something untoward, you wonder. Having got past that problem, my next thought was that perhaps there was a problem with the account being used. But the other subscribers were using the same account, without any problems. The client pointed out that that it was almost exactly six months since the last failure (later shown to be a complete red herring). It sounded like something might’ve expired. Checking through certificates and trusts showed no sign of anything, and besides, there wasn’t a problem running a command-prompt window using the account in question, from the subscriber box. ...except that when he ran the sqlcmd –E –S servername command I recommended, it failed with a Named Pipes error. I’ve seen problems with firewalls rejecting connections via Named Pipes but letting TCP/IP through, so I got him to look into SQL Configuration Manager to see what kind of connection was being preferred... Everything seemed fine. And strangely, he could connect via Management Studio. Turned out, he had a typo in the servername of the sqlcmd command. That particular red herring must’ve been reflected in his cheeks as he told me. During the time, I also pinged a friend of mine to find out who I should ask, and Ted Kruger (@onpnt) ‘s name came up. Ted (and thanks again, Ted – really) reconfirmed some of my thoughts around the idea of an account expiring, and also suggesting bumping up the logging to level 4 (2 is Verbose, 4 is undocumented ridiculousness). I’d just told the client to push the logging up to level 2, but the log file wasn’t appearing. Checking permissions showed that the user did have permission on the folder, but still no file was appearing. Then it was noticed that the user had been switched earlier as part of the troubleshooting, and switching it back to the real user caused the log file to appear. Still no errors. A lot more information being pushed out, but still no errors. Ted suggested making sure the FQDNs were okay from both ends, in case the servers were unable to talk to each other. DNS problems can lead to hassles which can stop replication from working. No luck there either – it was all working fine. Another server started to report a problem as well. These two boxes were both SQL 2008 R2 (SP1), while the others, still working, were SQL 2005. Around this time, the client tried an idea that I’d shown him a few years ago – using a Profiler trace to see what was being called on the servers. It turned out that the last call being made on the publisher was sp_MSenumschemachange. A quick interwebs search on that showed a problem that exists in SQL Server 2008 R2, when stored procedures have more than 4000 characters. Running that stored procedure (with the same parameters) manually on SQL 2005 listed three stored procedures, the first of which did indeed have more than 4000 characters. Still no error though, and the problem as listed at http://support.microsoft.com/kb/2539378 describes an error that should occur in the Event log. However, this problem is the type of thing that is fixed by a reinitialisation (because it doesn’t need to send the procedure change across as a transaction). And a look in the change history of the long stored procs (you all keep them, right?), showed that the problem from six months earlier could well have been down to this too. Applying SP2 (with sufficient paranoia about backups and how to get back out again if necessary) fixed the problem. The stored proc changes went through immediately after the service pack was applied, and it’s been running happily since. The funny thing is that I didn’t solve the problem. He had put the Profiler trace on the server, and had done the search that found a forum post pointing at this particular problem. I’d asked Ted too, and although he’d given some useful information, nothing that he’d come up with had actually been the solution either. Sometimes, asking for help is the most useful thing you can do. Often though, you don’t end up getting the help from the person you asked – the sounding board is actually what you need. @rob_farley

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• Sample code for my #mix10 talk online

  - by Laurent Bugnion

  I just saw that the video for my MIX10 session is online already! Impressive work, MIX10 team. I also published the sample code on my web server, so here are the links: Powerpoint slides Video MVVM Demo 1 (start) MVVM Demo 1 (final) Command sample RelayCommand sample Messaging sample MVVM Demo 2 (start) MVVM Demo 2 (final) MVVM Light Toolkit Version 3 It was a real pleasure and an amazing experience to have this talk and to get all the great feedback! Thanks all for coming, and as usual don’t hesitate to send your feedback! Laurent

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• SPSS launcher for Unity

  - by user67157

  I have "SPSS 20 for Linux" statistical analysis program installed under /opt/IBM directory. I can run it via terminal entering the command line with /opt/IBM, and it runs without any problems. When the program window opens, I go to the launcher and right-click on its icon to lock it there, but after closing it, the icon becomes useless. When I click on it, nothing happens. I tried to ceate a launcher for it, but there is no use again.

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• Separating a "wad of stuff" utility project into individual components with "optional" dependencies

  - by romkyns

  Over the years of using C#/.NET for a bunch of in-house projects, we've had one library grow organically into one huge wad of stuff. It's called "Util", and I'm sure many of you have seen one of these beasts in your careers. Many parts of this library are very much standalone, and could be split up into separate projects (which we'd like to open-source). But there is one major problem that needs to be solved before these can be released as separate libraries. Basically, there are lots and lots of cases of what I might call "optional dependencies" between these libraries. To explain this better, consider some of the modules that are good candidates to become stand-alone libraries. CommandLineParser is for parsing command lines. XmlClassify is for serializing classes to XML. PostBuildCheck performs checks on the compiled assembly and reports a compilation error if they fail. ConsoleColoredString is a library for colored string literals. Lingo is for translating user interfaces. Each of those libraries can be used completely stand-alone, but if they are used together then there are useful extra features to be had. For example, both CommandLineParser and XmlClassify expose post-build checking functionality, which requires PostBuildCheck. Similarly, the CommandLineParser allows option documentation to be provided using the colored string literals, requiring ConsoleColoredString, and it supports translatable documentation via Lingo. So the key distinction is that these are optional features. One can use a command line parser with plain, uncolored strings, without translating the documentation or performing any post-build checks. Or one could make the documentation translatable but still uncolored. Or both colored and translatable. Etc. Looking through this "Util" library, I see that almost all potentially separable libraries have such optional features that tie them to other libraries. If I were to actually require those libraries as dependencies then this wad of stuff isn't really untangled at all: you'd still basically require all the libraries if you want to use just one. Are there any established approaches to managing such optional dependencies in .NET?

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• unable to change brightness settings in sony vaio e series laptop

  - by yashwanth

  I am using Sony Vaio E Series VPCEH25EN laptop. I installed ubuntu 12.04 64 bit version and I couldn't change my brightness level. Always it is showing max brightness, I tried to change by using echo 0 | sudo tee /sys/class/backlight/acpi_video0/brightness command. When I run the above cmd it showing output as 0 but there is no change in brightness level. please help out how to change brightness levels.

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• Box2D networking

  - by spacevillain

  I am trying to make a simple sync between two box2d rooms, where you can drag boxes using the mouse. So every time player clicks (and holds the mousedown) a box, I try send joint parameters to server, and server sends them to other clients. When mouseup occurs, I send command to delete joint. The problem is that sync breaks too often. Is my way radically wrong, or it just needs some tweaks? http://www.youtube.com/watch?v=eTN2Gwj6_Lc Source code https://github.com/agentcooper/Box2d-networking

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• How to Create a PowerShell Profile

  - by Taylor Gibb

  PowerShell is a great way to automate almost anything in Windows. However, its not just a scripting language. If you find yourself using it as a command line shell it may be useful to store your functions and customizations in a profile that gets loaded every time you load the Console. Read on to find out how. 6 Ways Windows 8 Is More Secure Than Windows 7 HTG Explains: Why It’s Good That Your Computer’s RAM Is Full 10 Awesome Improvements For Desktop Users in Windows 8

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