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• GlusterFS on VMWare ESXi 5

  - by Dharmavir

  I want to build network file system on top of my VMWare ESXi based virtual nodes which are running Ubuntu 12.04 LTS. I am evalaluating options and found that GlusterFS (http://www.gluster.org/) can turn out to be a good choice. Purpose: I have about 2 dozen VM nodes with different configurations, on 2 physical nodes which has following configuration: 16 core Intel Xeon 1 TB 48 GB RAM Now as I said earlier each Physical server has about 1TB hdd and I can increase if I want additional so for now I have 2TB disk space available, these space is distributed in VM nodes I have created on which about 2 dozen VM nodes live. Now some of them being application server and mgmt server, they have plenty of free disk space which I want to utilize for some heavy storage which I can not design if I do that individually on single VM node. This way if my storage is distributed between dozens of VM nodes and about 2 or more physical nodes I have some sort of backup as well. I do not mind if data gets stored redundently but per my knowledge it might hapeen that individual VM nodes will not be able to store all of the data because complete data size for example if we take 100GB will exceed VM disk size of 70GB and then VM will also have system and program files on it. I need some suggestion that will GlusterFS be the solution for which I am looking forward to or I should go with something like hadoop? I am not too sure. But yes, I would like to utilize my free space on each VM node and while doing that if I get store data redundently I am okay because it will give me data security.

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• Rsync: General file/folder synchronization

  - by Rey Leonard Amorato

  I have a file server, which is in-charge of pulling a folder tree from multiple workstations on a daily basis. My current method for this is by using rsync, (which works pretty well provided directory names and/or files remain the same) however, when files are renamed or moved about within subdir1, rsync will copy them over to the server, creating duplicates. I have to manually find and delete extraneous files/folders that had been left on the server during previous syncs. Note that I cannot use rsync's --delete flag because any sync from a workstation will then mirror that particular folder tree, instead of merging them to the server. Visual diagram: Server: Workstation1 Workstation2 Workstation(n) Folder* Folder* Folder* Folder* -subdir1 -subdir1 -subdir1 -subdir(n) -file1 -file1 -file2 -file(n) -file2 -file(n) Is there a simple script (preferably in bash, nothing fancy) that can accomplish the deletion of the extraneous files/folders in the event a file is renamed or moved to a different subdir? Is there a different program, much like rsync that can accomplish this task autonomously and in a much simpler manner? I have looked at unison, but I did not like the fact that it keeps a local database for the syncing info. Any tips at all as to how I am supposed to tackle this? Thank you in advanced for your help. EDIT: I have tried unison just recently and I can safely say it is out of the question now. unison is a bi-directional synchronization tool and from my testing, it mirrors the files existing on the server to all workstations. - This is unwanted. preferably, i would want files/folders to stay within their respective workstations and just merge to the server. AKA uni-directional sync; but with renames/moves propagated to the server. I might have to look into Git/Mercurial/Bazaar as mentioned by kyle, but still unsure if they are fit for the job.

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• cannot log into mysql locally

  - by Lostsoul

  When I try to log into mysql locally using the command: mysql -u root -p I get this error: ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2) I can access the server remotely(not as root) and my web pages are using the mysql fine, but locally I cannot log on(which I need because I need to create some users). Only change I made was to attach another drive to the server and move the sql data there. Here's my.cnf [mysqld] datadir=/media/ephemeral0/data/mysql socket=/media/ephemeral0/data/mysql/mysql.sock user=mysql # Disabling symbolic-links is recommended to prevent assorted security risks symbolic-links=0 # adding more config skip-external-locking long_query_time=1 slow_query_log slow_query_log_file=/var/log/log-slow-queries.log log-bin=mysql-bin server-id= 1 [mysqld_safe] log-error=/var/log/mysqld.log pid-file=/var/run/mysqld/mysqld.pid myisam_recover_options I read I need to edit the socket info in my.cnf to make sure it points to the right socket file..I double checked and the file exists(although it starts with an S when I do ls -l "srwxrwxrwx 1 mysql mysql 0 Jun 21 03:43 mysql.sock"). I'm not really sure how to resolve this. I have tried to reboot and ran yum update to make sure I was running the latest packages. Please help!

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• attach / detach mssql 2008 sql server manager [SOLVED]

  - by Tillebeck

  An external consult wrote a guide on how to copy a database. Step two was detach the database using Sql Server Manager. After the detach the database was not visible in the SQL Server Manager... Not much to do but write a mail to the service provider asking to have the database attached again. The service porviders answer: Not posisble to attach again since the SQL Server security has been violated". Rolling back to last backup is not the option I want to use. Can any one give feedback if this seems logic and reasonable to assume that a detached database in a SQL Server 2008 accessed through SQL Server Manager cannot be reattached. It was done by rightclicking the database and choosing detach. -- update -- Based on the comments below I update the question with the server setup. There are two dedicated servers: srv1: Web server with remote desktop and an Sql Server Manager srv2: Sql server that can be accessed through the Sql Server Manager on the web server -- update2 -- After a restart of the server the DBA could suddenly do the attachment of the database. And I guess that after the restart it was a simple task. So all of your answer were rigth! It seems that I can only mark one as a correct answer so I marked the first answer correct. But all are correct answer. Thanks a lot. Without posting the link to this thread then we might had so suffer while watching our database beeing restored by a backup :-) Thanks a lot. BR. Anders

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• Wordpress Directory Permission to allow uploads, plugin folders, etc

  - by user1015958

  I have a wordpress pre-made site which were developed on my localmachine, and i uploaded it too a vps running on debian6, using nginx, mysql, php. Following this guide: 1) Create an unprivilaged user, this could be say 'karl' or whatever, and make them belong to the www-data group. So that if I were to login as karl and create a web root in say /home/karl/www/ , all the files will be owned by karl:www-data 2) Set up nginx as the user www-data in nginx.conf 3) Set up PHP-FPM to run as www-data 4) Place your files in /home/karl/www/[domain name maybe]/public_html/, upload as 'karl' so you don't have to chown everything again. when i type ls -l inside public_html/ it shows that all the files inside are owned by karl:karl. But the public_html directory is owned by karl:www-data. I chmod 0755 the folder wp-content but i still get the error: ERROR: Path ../wp-content/connection_images does not seem to be writeable. I know i shouldn't set it too 777 due to security reason, how should i set it too proper permission? and what should i set also to allow my users to upload,write posts,edit articles? Sorry for my english by the way.

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• Authenticating Linked Servers - SQL Server 8 to SQL Server 10

  - by jp2code

  We have an old SQL Server 2000 database that has to be kept because it is needed on our manufacturing machines. It also maintains our employee records, since they are needed on these machines for employee logins. We also have a newer SQL Server 10 database (I think this is 2008, but I'm not sure) that we are using for newer development. I have recently learned (i.e. today) that I can link the two servers. This would allow me to access the employee tables in the newer server. Following the SF post SQL Server to SQL Server Linked Server Setup, I tried adding the link. In our SQL Server 2000 machine, I got this error: Similarly, on our SQL Server 10 machine, I got this error: The messages, though worded different, probably say the same thing: I need to authenticate, somehow. We have an Active Directory, but it is on yet another server. What, exactly, should be done here? A guy HERE<< said to check the Security settings, but did not say what else to do. Both servers are set to SQL Server and Windows Authentication mode. Now what?

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• ISA 2006 SP1 - SSL Client Certificate Authentication in Workgroup Environment

  - by JoshODBrown

  We have an IIS6 website that was previously published using an ISA 2006 SP1 standard server publishing rule. In IIS we had required a client certificate be provided before the website could be accessed... this all worked fine and dandy. Now we wish to use a web publishing rule on ISA 2006 SP1 for this same website. However, it seems the client certificate doesn't get processed now, so of course the user can't access the website. I've read a few articles stating the CA for the certificate needs to be installed in the trusted root certificate authorities store on the ISA Server (i have done this), as well as installing the client certificate on the ISA Server (done as well). I have also verified that the ISA Server is able to access the CRL for our CA no problem... In the listener properties for the web publishing rule, under Authentication, and Client Authentication Method, there is an option for SSL Client Certificate Authentication... i select this, but it appears the only Authentication Validation Method selectable is Windows (Active Directory).... there is no Active Directory in this environment. When i configure the rule with the defaults, I then try to hit my website and it prompts for my certificate, i choose it and hit ok... then I'm given the following error Error Code: 500 Internal Server Error. The server denied the specified Uniform Resource Locator (URL). Contact the server administrator. (12202) I check the event logs on the ISA Server and in Security Logs, i see Event ID 536, Failure Aud. The reason: The NetLogon component is not active. I think this is pretty obvious since there is no active directory available. Is there a way to make this web publishing rule work using client certificates in this workgroup environment? Any suggestions or links to helpful documents would be greatly appreciated!

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• Mysql Cluster not working on Ubuntu

  - by user53864

  I am unable to setup MySQL Cluster on ubuntu servers. As a starting point I started from the link but I am not successful and the tar ball version I download is 6.3.45. As I wanted to test the mysql cluster, the Data node and SQL node are same but sql never appeared as connected in management node console and it looks like below. [ndbd(NDB)] 2 node(s) id=2 @192.168.1.107 (Version: version number, Nodegroup: 0, Master) id=3 @192.168.1.108 (Version: version number, Nodegroup: 0) [ndb_mgmd(MGM)] 1 node(s) id=1 @192.168.1.105 (Version: version number) [mysqld(API)] 2 node(s) id=4 (not connected, accepting connect from 192.168.1.107) id=5 (not connected, accepting connect from 192.168.1.108) On all the 3 machines mysql-server & client(apt-get install mysql-server mysql-client) were already installed and I completely stopped and also removed them at the system start up. Now the mysqld is from extracted cluster tar ball(/usr/local/mysql/support-files/mysql.server). As for testing, I created a test database on both the data nodes but the tables are also not syncing on other node. I checked many links, configurations are remained similar in all the links but somewhere it's going wrong. Anymore extra package is required?, Could anyone help me here..?. I am trying this for past 3 days... Thank you!

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• apache permission errors

  - by Wilduck

  I'm trying to set up Apache on a arch-linux box as a testing environment (I'm only using the localhost, not trying to serve anything to the greater web). When setting up Django with mod_wsgi, it recommended that I set up a WSGIScriptAlias from / to /usr/local/django/mysite/apache/django.wsgi . I've done this, as well as added the /usr/.../apache directory to my httpd.conf. When I try to access http://localhost I get a 403 forbidden error. I have no idea why this is happening. Things I've tried so far: 1) chown -R http .../apache 2) chmod -R 777 .../apache 3) using a simple Alias directive to host a static file from that directory. None of these have worked. I'm at a loss for what I'm doing wrong. Below is a relevant excerpt from my httpd.conf: Alias / /usr/local/django/mysite/apache <Directory "/usr/local/django/mysite/apache"> Order deny,allow Allow from all </Directory> So my question is: what am I doing wrong?

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• Subversion all or nothing access to repo tree

  - by Glader

  I'm having some problems setting up access to my Subversion repositories on a Linux server. The problem is that I can only seem to get an all-or-nothing structure going. Either everyone gets read access to everything or noone gets read or write access to anything. The setup: SVN repos are located in /www/svn/repoA,repoB,repoC... Repositories are served by Apache, with Locations defined in etc/httpd/conf.d/subversion.conf as: <Location /svn/repoA> DAV svn SVNPath /var/www/svn/repoA AuthType Basic AuthName "svn repo" AuthUserFile /var/www/svn/svn-auth.conf AuthzSVNAccessFile /var/www/svn/svn-access.conf Require valid-user </Location> <Location /svn/repoB> DAV svn SVNPath /var/www/svn/repoB AuthType Basic AuthName "svn repo" AuthUserFile /var/www/svn/svn-auth.conf AuthzSVNAccessFile /var/www/svn/svn-access.conf Require valid-user </Location> ... svn-access.conf is set up as: [/] * = [/repoA] * = userA = rw [/repoB] * = userB = rw But checking out URL/svn/repoA as userA results in Access Forbidded. Changing it to [/] * = userA = r [/repoA] * = userA = rw [/repoB] * = userB = rw gives userA read access to ALL repositories (including repoB) but only read access to repoA! so in order for userA to get read-write access to repoB i need to add [/] userA = rw which is mental. I also tried changing Require valid-user to Require user userA for repoA in subversion.conf, but that only gave me read access to it. I need a way to default deny everyone access to every repository, giving read/write access only when explicitly defined. Can anyone tell me what I'm doing wrong here? I have spent a couple of hours testing and googling but come up empty, so now I'm doing the post of shame.

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• Why does "commit" appear in the mysql slow query log?

  - by Tom

  In our MySQL slow query logs I often see lines that just say "COMMIT". What causes a commit to take time? Another way to ask this question is: "How can I reproduce getting a slow commit; statement with some test queries?" From my investigation so far I have found that if there is a slow query within a transaction, then it is the slow query that gets output into the slow log, not the commit itself. Testing In mysql command line client: mysql begin; Query OK, 0 rows affected (0.00 sec) mysql UPDATE members SET myfield=benchmark(9999999, md5('This is to slow down the update')) WHERE id = 21560; Query OK, 0 rows affected (2.32 sec) Rows matched: 1 Changed: 0 Warnings: 0 At this point (before the commit) the UPDATE is already in the slow log. mysql commit; Query OK, 0 rows affected (0.01 sec) The commit happens fast, it never appeared in the slow log. I also tried a UPDATE which changes a large amount of data but again it was the UPDATE that was slow not the COMMIT. However, I can reproduce a slow ROLLBACK that takes 46s and gets output to the slow log: mysql begin; Query OK, 0 rows affected (0.00 sec) mysql UPDATE members SET myfield=CONCAT(myfield,'TEST'); Query OK, 481446 rows affected (53.31 sec) Rows matched: 481446 Changed: 481446 Warnings: 0 mysql rollback; Query OK, 0 rows affected (46.09 sec) I understand why rollback has a lot of work to do and therefore takes some time. But I'm still struggling to understand the COMMIT situation - i.e. why it might take a while.

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• Java Deployment Ruleset not working

  - by adbertram

  I've created a Java Deployment Ruleset that looks like this: <ruleset version="1.0+"> <rule> <id location="http://hpfweb.mydomain.com/" /> <action permission="run" version="1.6.0_20" /> </rule> <rule> <id location="http://*.mydomain.com" /> <action permission="run" /> </rule> <rule> </ruleset> I've created a self-signed cert, added it into the keystore as well as Trusted Certification Authorities. I have an app at http://hpfweb.mydomain.com that requires Java v1.6.20 and will error out if any other version is attempted. When only this version is installed on the computer the application works. However, if a newer version is installed, it does not. As you can see, I've attempted to force the version to 1.6.0_20 in the ruleset. I've confirmed the deployment rule set is being applied successfully by going into the Java Control Panel -- Security and "view the active deployment rule set". It is exactly as you see here. I've also looked at the web source for the application and all references point to http://hpfweb* links. When the applet is launched I've brought up task manager and have confirmed the java.exe launched is coming from the jre6 directory. When the newer version is installed, I'm getting the error "accesscontrolexception - access denied (java.awt.AWTPermission.accessEventQueue".

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• Nginx - Enable PHP for all hosts

  - by F21

  I am currently testing out nginx and have set up some virtual hosts by putting configurations for each virtual host in its own file in a folder called sites-enabled. I then ask nginx to load all those config files using: include C:/nginx/sites-enabled/*.conf; This is my current config: http { server_names_hash_bucket_size 64; include mime.types; include C:/nginx/sites-enabled/*.conf; default_type application/octet-stream; sendfile on; keepalive_timeout 65; server { listen 80; root C:/www-root; #charset koi8-r; #access_log logs/host.access.log main; location / { index index.html index.htm index.php; } # redirect server error pages to the static page /50x.html # error_page 500 502 503 504 /50x.html; location = /50x.html { root html; } location ~ \.php$ { fastcgi_pass 127.0.0.1:9000; fastcgi_index index.php; fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name; include fastcgi_params; } } server{ server_name localhost; } } And this is one of the configs for a virtual host: server { server_name testsubdomain.testdomain.com root C:/www-root/testsubdomain.testdomain.com; } The problem is that for testsubdomain.testdomain.com, I cannot get php scripts to run unless I have defined a location block with fastcgi parameters for it. What I would like to do is to be able to enable PHP for all hosted sites on this server (without having to add a PHP location block with fastcgi parameters) for maintainability. This is so that if I need to change any fastcgi values for PHP, I can just change it in 1 location. Is this something that's possible for nginx? If so, how can this be done?

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• Linux Experts Riddle: Network output of 10MB/s on 10GB/s NIC

  - by user150324

  I have two CentOS 6 servers. I am trying to transfer files between them. Source server has 10GB/s NIC nd destination server has 1GB/s NIC. Regardless to the command used nor the protocol, the transfer speed is ~1 Mega byte per second. The goal is at least couple dozens MB per second. I have tried: rsync (also with various encryptions), scp, wget, aftp, nc. Here's some testing results with iperf: [root@serv ~]# iperf -c XXX.XXX.XXX.XXX -i 1 ------------------------------------------------------------ Client connecting to XXX.XXX.XXX.XXX, TCP port 5001 TCP window size: 64.0 KByte (default) ------------------------------------------------------------ [ 3] local XXX.XXX.XXX.XXX port 33180 connected with XXX.XXX.XXX.XXX port 5001 [ ID] Interval Transfer Bandwidth [ 3] 0.0- 1.0 sec 1.30 MBytes 10.9 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 1.0- 2.0 sec 1.28 MBytes 10.7 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 2.0- 3.0 sec 1.34 MBytes 11.3 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 3.0- 4.0 sec 1.53 MBytes 12.8 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 4.0- 5.0 sec 1.65 MBytes 13.8 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 5.0- 6.0 sec 1.79 MBytes 15.0 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 6.0- 7.0 sec 1.95 MBytes 16.3 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 7.0- 8.0 sec 1.98 MBytes 16.6 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 8.0- 9.0 sec 1.91 MBytes 16.0 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 9.0-10.0 sec 2.05 MBytes 17.2 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 0.0-10.0 sec 1.68 MBytes 14.0 Mbits/sec I guess HD is not the bottleneck here.

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• Gentoo Linux useful utilities

  - by Alakdae

  I want to make a list of utilities that come in handy in Gentoo (general Linux tools available in all distributions also appreciated). What tools and commands do you use and consider helpful in administration of a Gentoo server? I will update the list with command from answers from time to time. eclean Utility for cleaning distfiles and binary packages. Usage example: eclean distfiles Usage example output: Cleans out the files in /usr/portage/distfiles. Pretty handy. Package: app-portage/gentoolkit eix Very useful tool for getting information about a package. Similar to "emerge -s" but much faster and more precise. Usage example: eix gentoolkit Usage example output: Show information about package such as: available versions, masked versions, installed versions and description. Package: app-portage/eix eix-test-obsolete Check system for obsolete, redundant, uninstalled entries in package.keywords, package.mask, package.unmask, package.use and package.cflags Usage example: eix-test-obsolete Usage example output: Shows non-matching entries, redundant entries, and uninstalled entries. Package: app-portage/eix equery Another very useful tool for getting information about packages (listing package files, checking which files belong to which package and much more) Usage example: equery b emerge Usage example output: Show which packages installed a file called emerge Package: app-portage/gentoolkit genlop Utility for extracting information about emerged ebuilds Usage example: genlop -l --date yesterday Usage example output: Show a list of packages that have been emerged yesterdayPackage: app-portage/genlop glsa-check Checks system if it's affected by GLSAs (security issues) Usage example: glsa-check -l affected Usage example output: List of GLSA that the system is affected by. Package: app-portage/gentoolkit rc-update Utility for managing (adding, deleting) runlevel scripts. Usage example: rc-update add syslog-ng default Usage example output: Adds syslog-ng to default runlevel. Package: sys-apps/baselayout revdep-rebuild Scans libraries and binaries for missing shared library dependencies Usage example: revdep-rebuild Usage example output: Gather binaries and libraries information, check for dependencies, rebuild packages with missing dependencies Package: app-portage/gentoolkit

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• Cisco Catalyst 3750 connected to Cisco ASA 5505 and dropping packets

  - by Bo102010

  (Cross posted from Super User per suggestion there) At the office, I have inherited a network that I am still trying to fully comprehend. I have a problem today with a new connection between: A port on a Cisco Catalyst 3750 [WS-C3750G-48TS-S running C3750-IPSERVICESK9-M version 12.2(53)SE1] A port on a Cisco ASA 5505 [ASA Software version 8.3(2)] The 3750 is home to a Vlan that has a few ports assigned to it. interface Vlan3 description Internal network (172.18.160.0/24) ip address 172.18.160.1 255.255.255.0 I have a host (outside of my control) that needs to be in this VLAN (i.e it must have an address 172.18.160.something/24) that also needs to access the Internet. To accomplish this, I ran a link from the Catalyst (Gi1/0/13) to the ASA (Ethernet 0/5). I configured the Catalyst port like so: interface GigabitEthernet1/0/13 description To ASA, 172.18.160.69 switchport access vlan 3 switchport mode access speed 100 duplex full I configured the ASA like so: interface Vlan1 nameif inside security-level 100 ip address 172.18.160.69 255.255.255.0 interface Ethernet0/5 speed 100 duplex full Then I plugged the host into Ethernet 0/4 on the ASA and instructed its owner to make its default gateway 172.18.160.69. I made a NAT rule in the ASA and set up some rules, and it's able to access the Internet without issue. However, I noticed that the Catalyst reports a ton of packets being dropped toward the ASA. Catalyst3750#show interfaces GigabitEthernet 1/0/13 | include counters|drops Last clearing of "show interface" counters 00:28:13 Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 136909347 This is a huge number of drops, since there's not much traffic on this VLAN at all. I tried these things: Make sure speed and duplex agree on both sides (100 Mbps / Full) Set no cdp enable on the Catalyst Gi10/13 Set no keepalive on the Catalyst Gi10/13 Checked for excessive CPU usage on both Checked for excessive traffic on both Am I missing something? Any help would be appreciated.

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• Samba and Windows 7

  - by John Gaughan

  I built a new computer with the intention of it being primarily a home file server. Here is my setup: one desktop with Windows 7 64 HP one laptop with Windows 7 64 HP one desktop with Kubuntu 11.10 (server) The two desktops use static IPs, and I have hostnames mapped in the HOSTS files on all three systems. I have the same username/password combo on all three systems. I have been trying for a while now to set up Samba so the Windows 7 systems can see and use it. Even if I can get the server to show up, Windows is unable to log in. One of the first things I did was to enable LMv2 authentication, which this version of Samba (3.5.11) supports. The workgroup is set correctly. I can normally see the server, but cannot authenticate. Windows homegroup is turned off. Pinging between machines works fine, and the two Windows 7 systems work together flawlessly. What I am trying to do is set up Samba to use peer to peer networking using NTLM security and user-mode authentication. According to the documentation this is possible, but there are no examples that I could find. In all the googling I have done, I see a lot of people asking how to set this up but it either works for someone else and not for me (no idea what I'm missing), or it doesn't work. Has anyone gotten this to work? Is there a place I could download a smb.conf that is set up to work in this environment?

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• Symbolic links not working in MySQL

  - by Eno

  I'm having an issue, I searched a lot but I'm not sure if it's related to a previous security patch. On the last version of MySQL on Debian Lenny ( 5.0.51a-24 ) I need to share one table between two db, those two db are in the same path ( /var/lib/mysql/db1 & db2 ). I created symbolic links for db2 pointing to the table in db1. When I query the same table from db2 I get this : 'ERROR 1030 (HY000): Got error 140 from storage engine' This is how it looks : test-lan:/var/lib/mysql/test3# ls -alh drwx------ 2 mysql mysql 4.0K 2010-08-30 13:28 . drwxr-xr-x 6 mysql mysql 4.0K 2010-08-30 13:29 .. lrwxrwxrwx 1 mysql mysql 28 2010-08-30 13:28 blbl.frm -> /var/lib/mysql/test/blbl.frm lrwxrwxrwx 1 mysql mysql 28 2010-08-30 13:28 blbl.MYD -> /var/lib/mysql/test/blbl.MYD lrwxrwxrwx 1 mysql mysql 28 2010-08-30 13:28 blbl.MYI -> /var/lib/mysql/test/blbl.MYI -rw-rw---- 1 mysql mysql 65 2010-08-30 13:24 db.opt I really need those symlinks, is there a way to make them working like before ? ( old MySQL-server is fine ) Thanks,

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• Tuning Windows 7 for use in a VM

  - by intuited

  I'm running Windows 7 in a VirtualBox Virtual Machine, and would like to make it run in a more streamlined fashion. I'll be using the install primarily for testing web apps, and have no need for it to run quickly. I would like it to run with minimal memory requirements, and with minimal changes to its virtual hard drive's contents. Changes to the hard drive contents, for example the paging file, result in larger snapshot sizes. Another recent post of mine seems to be related to this issue, but does not directly address issues with Windows. One concern that I have is that Windows seems to be using 17% of its paging file even with over 900MB of memory marked "Standby" or "Free". My uneducated guess is that this is being used to store indexes or some other data that helps to speed up the system but is not really necessary. I'm also wondering if it's normal for Windows to use over 500 MB of "In Use" memory with no apps running. Will this amount decrease if I reduce the amount of "installed" memory in the VM? What steps can I take to reduce the system's memory footprint without incurring an increase in paging file usage?

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• How can I debug user mode driver failures in Windows 8

  - by Tom

  I have a 32 GB SD Card. Whenever I insert this card in to my newly upgraded Windows 8 laptop the OS stops responding normally. Metro Apps won't work. The system may or may not log in. Desktop apps may or may not be able to do things. When I remove the card and restart then all is fine. As soon as I put the card back in, the system starts misbehaving again. I've run Windows Update, so I have the latest drivers from Microsoft. This does not occur with the 8 GB cards I have. Unfortunately I only have one 32 GB card, so I can't test with others. From examining the system event log I've determined this is happening due to a user mode driver failure. How can I best debug this issue from here? How can I figure out which driver this is related to? Will there be a Dr. Watson crash dump somewhere? Details - System - Provider [ Name] Microsoft-Windows-DriverFrameworks-UserMode [ Guid] {2E35AAEB-857F-4BEB-A418-2E6C0E54D988} EventID 10110 Version 1 Level 1 Task 64 Opcode 0 Keywords 0x2000000000000000 - TimeCreated [ SystemTime] 2012-10-29T00:51:57.532718300Z EventRecordID 40417 Correlation - Execution [ ProcessID] 1056 [ ThreadID] 3796 Channel System Computer thebrain - Security [ UserID] S-1-5-18 - UserData - UMDFHostProblem [ lifetime] {811E3DC4-FBC6-420B-ABCC-AD7505A36F3B} - Problem [ code] 3 [ detectedBy] 2 ExitCode 3 - Operation [ code] 259 Message 72448 Status 4294967295 Edit 1 So I tried using Debug View from SysInternals (you can get it here: http://technet.microsoft.com/en-us/sysinternals/bb896647.aspx). That gave me this information: which is not especially helpful. Then I tried connecting WinDbg to WUDFHost.exe (the process that seems to host user mode drivers) to see if it could catch the error. Get it here: http://msdn.microsoft.com/en-US/windows/hardware/hh852363 Instructions: http://msdn.microsoft.com/en-US/library/windows/hardware/ff554716(v=vs.85).aspx That didn't help much. It didn't catch any exceptions as I'd hoped (which would point me to the cause of the crash at least). Here's the stack of one of the threads:

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• Disabling Skype automatic update

  - by user13267

  How to stop skype from searching or at least downloading update without consent? I want that annoying "Update skype now" dialog box that keeps popping up before I log in to Skype and after I log in to Skype from appearing at all. Few months ago this used to work: 1) C:\Users\”YourName”\AppData\Local\Temp folder. 2) Find the file called SkypeSetup.exe, and delete it. 3) Create a text file in the folder, rename it to SkypeSetup.exe 4) Right click on the new file you just created and ask for properties. 5) Next left click the security tab then left click the advanced button. 6) Now left click “Change Permissions” and then “Add”. Enter “Everyone” (without the quotes) where it sez’, “Enter the object name to select (examples):” and click “OK”. 7) Now check the “Deny” box for “Full control” and click “OK”. obtained from HERE, but now it seems this has stopped working. The worst part is Skype seems to download ~30MB of executable setup file without my knowledge before bugging me with the dialog box to update it, and there seems to be no direct way to disable this download. And disabling the skype updater service does not seem to work either. Is there any kind of patch or registry hack I can use to stop skype from auto updating? Or should I start looking for an alternative to Skype altogether?

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• Setting up CIFS ISO Repository for Xen

  - by user85610

  I recently started working with Xen, to try to make better use of an extra desktop box for development testing. I'd like to be able to do OS installs on it without having to burn discs, but I'm having some trouble actually being able to get it to boot OS ISOs from a Windows share. My Windows box is running Win 7, and it's on a domain. I created a CIFS ISO SR in Xen, specifying the correct username and password to use. Xen is able to scan the share, and I see the ISOs that are in the folder, and can select them in the list in XenCenter. However, when I try to start the VM, I get "Error: Starting VM 'linxcentos' - INVALID_SOURCE - Unable to access a required file in the specified repository: file:///tmp/cdrom-repo-hIz-H7/isolinux/vmlinuz." I tried booting a different Linux ISO and got the same result. I know that the ISOs are valid because I was able to install them without issue when I tried VMWare ESXi earlier. What am I missing here? It's Xen/XenCenter 6 and I'm trying to install the newest version of Centos. I may end up burning it for now, but I'd like to get this to work, at least just for the principle of not letting mysterious behaviors go unsolved...

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• nginx rewrite or internal redirection cycle

  - by gyre

  Im banging my head against a table trying to figure out what is causing redirection cycle in my nginx configuration when trying to access URL which does not exist Configuration goes as follows: server { listen 127.0.0.1:8080; server_name .somedomain.com; root /var/www/somedomain.com; access_log /var/log/nginx/somedomain.com-access.nginx.log; error_log /var/log/nginx/somedomain.com-error.nginx.log debug; location ~* \.php.$ { # Proxy all requests with an URI ending with .php* # (includes PHP, PHP3, PHP4, PHP5...) include /etc/nginx/fastcgi.conf; } # all other files location / { root /var/www/somedomain.com; try_files $uri $uri/ ; } error_page 404 /errors/404.html; location /errors/ { alias /var/www/errors/; } #this loads custom logging configuration which disables favicon error logging include /etc/nginx/drop.conf; } this domain is a simple STATIC HTML site just for some testing purposes. I'd expect that the error_page directive would kick in in response to PHP-FPM not being able to find given files as I have fastcgi_intercept_errors on; in http block and nave error_page set up, but I'm guessing the request fails even before that somewhere on internal redirects. Any help would be much appreciated.

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• Are there any wireless webcams/cameras that Windows will recognize as a capture device?

  - by Keithius

  I'd like to have a webcam in a different room from my computer, and the distance means USB is out of the question. I know there are many wireless cameras, but what I can't seem to find out is if any of them would be recognized by Windows as a capture device (just like a locally connected USB webcam). Most of the wireless cameras I can find (e.g., D-Link DCS920; Cisco-Linksys WVC54GCA, etc.) can all stream video directly from the camera itself, which is fine if you're using the camera as a "security" camera (for private use only), but not for other uses (say, sending the video to an online video streaming service, e.g., Ustream). It seems like this should be possible; after all, wireless (WiFi) printers with scanners are recognized by Windows. Are there any wireless (WiFi) cameras out there that would be recognized by Windows as a capture device in the same way as a USB webcam would? Alternatively, a camera that's not wireless (e.g., connects via Ethernet) would do the trick too - but I imagine if anyone is going to make a remote camera like this, they'd go the extra step and make it wireless, too.

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• JBoss7 load balancing with mod_proxy_balancer - session not working

  - by Phil P.

  I am trying to set up mod_proxy_balancer for routing requests to 2 jboss7-servers. For the time being I am testing this setup on my local machine, using following config in httpd.conf: ProxyRequests Off <Proxy \*> Order deny,allow Deny from all </Proxy> ProxyPass / balancer://mycluster/ stickysession=JSESSIONID|jsessionid scolonpathdelim=On <Proxy balancer://mycluster> BalancerMember http://localhost:8080 route=node1 BalancerMember http://localhost:8081 route=node2 Order allow,deny Allow from all </Proxy> and in the standalone.xml file of each jboss I have defined the jvmRoute system property: <system-properties> <property name="jvmRoute" value="node1"/> </system-properties> At http:// localhost/myapp the application is accessible but the java-session is not build up correctly. Consequently the authentication is not working. The funny thing is, that everything is working if I turn off one JBoss-instance. As I have tried a couple of settings already, I am thankful for any further suggestions.

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