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• InnoDB: Error: log file ./ib_logfile0 is of different size

  - by jack

  I just added the following lines in /etc/mysql/my.cnf after I converted one database to use InnoDB engine. innodb_buffer_pool_size = 2560M innodb_log_file_size = 256M innodb_log_buffer_size = 8M innodb_flush_log_at_trx_commit = 2 innodb_thread_concurrency = 16 innodb_flush_method = O_DIRECT But it raise "ERROR 2013 (HY000) at line 2: Lost connection to MySQL server during query" error restarting mysqld. And mysql error log shows the following InnoDB: Error: log file ./ib_logfile0 is of different size 0 5242880 bytes InnoDB: than specified in the .cnf file 0 268435456 bytes! 100118 20:52:52 [ERROR] Plugin 'InnoDB' init function returned error. 100118 20:52:52 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed. 100118 20:52:52 [ERROR] Unknown/unsupported table type: InnoDB 100118 20:52:52 [ERROR] Aborting So I commented out this line # innodb_log_file_size = 256M And it restarted mysql successfully. I wonder what's the "5242880 bytes of log file" showed in mysql error? It's the first database on InnoDB engine on this server so when and where is that log file created? In this case, how can I enable innodb_log_file_size directive in my.cnf? EDIT I tried to delete /var/lib/mysql/ib_logfile0 and restart mysqld but it still failed. It now shows the following in error log. 100118 21:27:11 InnoDB: Log file ./ib_logfile0 did not exist: new to be created InnoDB: Setting log file ./ib_logfile0 size to 256 MB InnoDB: Database physically writes the file full: wait... InnoDB: Progress in MB: 100 200 InnoDB: Error: log file ./ib_logfile1 is of different size 0 5242880 bytes InnoDB: than specified in the .cnf file 0 268435456 bytes! Resolution It works now after deleted both ib_logfile0 and ib_logfile1 in /var/lib/mysql

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• Issues with ProxyPass and ProxyPassReverse when proxying to localhost and a different TCP port

  - by mbrownnyc

  I am attempting to use ProxyPass and ProxyPassReverse to proxy requests through Apache to another server instance that is bound to the localhost on a different TCP port that the Vhost exists (VHost is bound to :80, when the target is bound to :5000). However, I am repeatedly receiving HTTP 503 when accessing the Location. According to the ProxyPass documentation... <VirtualHost *:80> ServerName apacheserver.domain.local DocumentRoot /var/www/redmine/public ErrorLog logs/redmine_error <Directory /var/www/redmine/public> Allow from all Options -MultiViews Order allow,deny AllowOverride all </Directory> </VirtualHost> PassengerTempDir /tmp/passenger <Location /rhodecode> ProxyPass http://127.0.0.1:5000/rhodecode ProxyPassReverse http://127.0.0.1:5000/rhodecode SetEnvIf X-Url-Scheme https HTTPS=1 </Location> I have tested binding the alternate server to the interface IP address, and the same issue occurs. The server servicing request is an instance of python paste:httpserver, and it has been configured to use the /rhodecode suffix (as I saw this to be mentioned in other posts about ProxyPass). The documentation from the project itself, Rhodecode, reports to use the above. The issue is persistent if I target another server that is serving on a different port. Does ProxyPass allow proxying to a different TCP port? [update] I won't delete this, in case someone comes across the same issue. I had set an ErrorLog, and in that ErrorLog the following error was reported: [Wed Nov 09 11:36:35 2011] [error] (13)Permission denied: proxy: HTTP: attempt to connect to 127.0.0.1:5000 (192.168.100.100) failed [Wed Nov 09 11:36:35 2011] [error] ap_proxy_connect_backend disabling worker for (192.168.100.100) After some more research, I attempted to set SELinux to permissive (echo 0 >/selinux/enforce), and try again. It turns out the SELinux boolean httpd_can_network_connect must be set to 1. For persistence on reboot: setsebool -P httpd_can_network_connect=1

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• Windows 2008 Terminal Services "Easy Print" and Matrix Printers

  - by Cesar87

  Server: Windows 2008 Server Standard SP2 with "Terminal Services" role Clients: Windows XP SP3 + .NET 3.5 Framework SP1 + Remote Desktop Client 7.0 We are using "Easy Print" feature which allows programs running on server to "see" printers installed on client machines. Everything works fine, EXCEPT when we send a text-only output to a dot-matrix printer. In this case, the printer only outputs a blank page. At first, we had problems with the error "Windows Presentation Foundation Terminal Server Print W has encountered a problem and needs to close." but this was fixed by replacing TsWpfWrp.exe with the one from Vista SP1 as suggested here. But now, we only get a blank page! Every other (graphical) document we sent to printer works 100%. We also tried to use the "Generic text-only" driver, but the result is same. Now we are trying to change parameters like print processor on "advanced" tab from printer driver to see if something happen. But this is just guessing and we really don't know what to try anymore. The problem appears to be on Easy Print driver, but we found almost no resources about it. Any tips are welcome.

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• gen-msg.map missing in Snort rules?

  - by TheLQ

  I am trying to install Snort 2.8.4.1 (only package available in the repos) with Barnyard2 with limited success. I've managed to fix everything but this: [lordquackstar@quackwall rules]$ sudo barnyard2 -c /etc/snort/barnyard2.conf -d /var/log/snort -f snort.u2 -w /etc/snort/barny Password: Running in Continuous mode --== Initializing Barnyard2 ==-- Initializing Input Plugins! Initializing Output Plugins! Parsing config file "/etc/snort/barnyard2.conf" ERROR: Unable to open Generator file "/etc/snort/gen-msg.map": No such file or directory ERROR: Stat check on log dir (/var/log/barnyard2) failed: No such file or directory. Fatal Error, Quitting.. The gen-msg.map error is puzzling me. The rulesets that come with the package do not contain this file. The newish rules I just downloaded from Snort.org for version 2.8.6.1 don't have this file. The only file that looks close is called sid-msg.map, but that's the wrong one. Where can I obtain this file? Just in case it matters: The packages come from the ClearOS repositories (OS is based off of CentOS). I'm running CentOS 5.2

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• Cisco adaptive security appliance is dropping packets where SYN flag is not set

  - by Brett Ryan

  We have an apache instance sitting inside our DMZ which is configured to proxy requests to an internal NATed tomcat instance inside our network. It works fine, but then all of a sudden requests from apache to the tomcat instance stop getting through with the following in the apache logs: [error] (70007)The timeout specified has expired: ajp_ilink_receive() can't receive header Investigating into the Cisco log viewer reveals the following: Error Message %ASA-6-106015: Deny TCP (no connection) from IP_address/port to IP_address/port flags tcp_flags on interface interface_name. Explanation The adaptive security appliance discarded a TCP packet that has no associated connection in the adaptive security appliance connection table. The adaptive security appliance looks for a SYN flag in the packet, which indicates a request to establish a new connection. If the SYN flag is not set, and there is not an existing connection, the adaptive security appliance discards the packet. Recommended Action None required unless the adaptive security appliance receives a large volume of these invalid TCP packets. If this is the case, trace the packets to the source and determine the reason these packets were sent. All are machines are virtualised using VMware, and by default machines have been using the Intel E1000 emulated NIC. Our network administrator has changed this to a VMXNET3 driver in an attempt to correct the problem, we just have to wait and see if the problem persists as it's an intermittent problem. Is there something else that could be causing this problem? This isn't the first service where we have had similar issues. Our apache host is running Ubuntu 11.10 with a kernel version of 3.0.0-17-server. We have also had this issue on RHEL5 (5.8) running kernel 2.6.18-308.16.1.el5, this machine also has the E1000 NIC. NOTE: I am not a network administrator and am a software architect and analyst programmer responsible for these systems.

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• Do we need to explicitly pass php.ini's location to php-fpm?

  - by F21

  I am seeing a strange issue where my php.ini is not used if I do not explicitly pass it to php-fpm when starting it. This is the upstart script I am using: start on (filesystem and net-device-up IFACE=lo) stop on runlevel [016] pre-start script mkdir -p /run/php end script expect fork respawn exec /usr/local/php/sbin/php-fpm --fpm-config /etc/php/php-fpm.conf If PHP is started with the above, my php.ini is never used, even though it is in Configuration File (php.ini) Path. This is the relevant part from phpinfo(): Configuration File (php.ini) Path /etc/php/ Loaded Configuration File (none) Scan this dir for additional .ini files (none) Additional .ini files parsed (none) If I modify the last line of the upstart script to point php-fpm to php.ini explicitly: exec /usr/local/php/sbin/php-fpm --fpm-config /etc/php/php-fpm.conf -c /etc/php/php.ini Then we see that the php.ini is loaded: Configuration File (php.ini) Path /etc/php/ Loaded Configuration File /etc/php/php.ini Scan this dir for additional .ini files (none) Additional .ini files parsed (none) Why is this the case? Is this a quirk in php-fpm? Minor update: This also seems to be a problem for php5-fpm installed using apt-get. I did a test install in a Ubuntu Server 12.04 virtual machine by running the following: sudo apt-get install nginx php5-fpm PHP-FPM and nginx were started after installation and everything seemed fine. I then uncommented php's settings in nginx's configuration and placed a test phpinfo() file to inspect PHP's settings. The relevant bits are: Configuration File (php.ini) Path /etc/php5/fpm Loaded Configuration File (none) Scan this dir for additional .ini files /etc/php5/fpm/conf.d Additional .ini files parsed /etc/php5/fpm/conf.d/10-pdo.ini I noted that no php.ini was loaded either. However, if I go to /etc/php5/fpm, I can see that a php.ini exists. I also checked the start up scripts for PHP-FPM and the -c parameter was not used to link the ini file to PHP. This can potentially be confusing for people who would expect php.ini to be loaded automatically by PHP-FPM.

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• Useful Excel keyboard shortcuts

  - by Ben Lings

  What keyboard shortcuts do you use in Excel? Things I've discovered recently and found very useful are: Shift + Space - select the current row Ctrl + Space - select the current column Ctrl + Shift + Space - select the block of contiguous cell Ctrl + + - Insert (as in the context menu). If the current row is selected, will insert a new row. Ctrl + - - Delete (as in the context menu). If the current row is selected, will delete entire row. What (apart from the normal cut, copy, paste, etc) do you use? Ctrl + 1 to open the Format dialog. Shift + F2 to add/edit a cell comment. Shift + F2, followed by Esc to select the current cell comment, which can then be moved around with the arrow keys (????) or deleted by pressing Del. Ctrl + ???? to move to the last non-blank cell in a series. This is usually the edge of a table, but not if you have blank cells in the path. Pressing End followed by an arrow key does the same thing. Alt + F11 to open the VBA editor. Alt + = to start a SUM() formula and go straight to selecting cells to be summed. Ctrl + G or F5 to jump to a cell by typing its coordinates (e.g. C3) Ctrl + Home to jump to the top left, usually A1 unless you you are in a frozen split view, in which case it will jump to the top left of the "data" area. Ctrl + ; and Ctrl + Shift + ; to insert the current date and time, respectively. I know Ben Lings already posted this one, but I find it indispensable.

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• Windows Server 2008 R2, SQL Server 2008 R2, and Registry Backups

  - by charliedigital

  Hi folks! As a developer, I've installed various instances of SQL Sever (2000, 2005, 2008, R2) from all the ways back to 2003 and I've never had an install fail on me....until yesterday. I was installing SQL Server 2008 R2 onto a Windows Server 2008 R2 hosted virtual server and the install finished, but failed on every component. To make matters worse, it was in a state in which I could not uninstall it either, even using command line options! I dug around a bit, but didn't get very far with it. The error is enigmatic and Google didn't turn up much hope. So today, I am going to try again after having the VM image wiped overnight. My question is how can I guard against the same failure today? I don't mind if it fails, but then I know it may be something wrong with the base image I'm getting from the hosting company. I really don't feel like paying another $20 to wipe the VM and I have no idea why it failed. Is it enough for me to backup the registry so that I can restore it in case it fails? What about the installation files? Do I need to have a tool to clean that out, too? Sorry, I'm no sys admin so no real experience with backup/restore aside from System Restore! So any advice would be appreciated!

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• How do I host node.js apps with pm2 without running them as root?

  - by jishi

  I have setup pm2 to run a node.js application, and I can successfully start it and it will resurrect upon reboot. However, the pm2 daemon is ran as root, which makes me think that all my node-scripts also runs as root? Even though I added them as a regular user in the system. The log files and stuff is created in the users home dir, /~/.pm2/logs, but the logs are owned by root. when I invoke pm2 startup (which handles the installation of the init.d script etc), it creates /etc/init.d/pm2-init.sh which looks like this: #!/bin/bash # chkconfig: 2345 98 02 # # description: PM2 next gen process manager for Node.js # processname: pm2 # ### BEGIN INIT INFO # Provides: pm2 # Required-Start: # Required-Stop: # Should-Start: # Should-Stop: # Default-Start: 2 3 4 5 # Default-Stop: 0 1 6 # Short-Description: PM2 init script # Description: PM2 is the next gen process manager for Node.js ### END INIT INFO NAME=pm2 PM2=/usr/local/lib/node_modules/pm2/bin/pm2 NODE=/usr/local/bin/node export HOME="/root" start() { echo "Starting $NAME" $NODE $PM2 stopAll $NODE $PM2 resurrect } stop() { $NODE $PM2 dump $NODE $PM2 stopAll } restart() { echo "Restarting $NAME" stop start } status() { echo "Status for $NAME:" $NODE $PM2 list RETVAL=$? } case "$1" in start) start ;; stop) stop ;; status) status ;; restart) restart ;; *) echo "Usage: {start|stop|status|restart}" exit 1 ;; esac exit $RETVAL When I dump the processes (which is what it will use when resurrecting the processes), I see mentions of user "USER":"pi" but I don't think that it's actually run as user pi. Any thoughts?

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• Server 2008 R2 - Unable to install any printer drivers

  - by toffitomek

  My problem is exactly this same as described here: Server 2008 R2 - Unable to install any printer drivers Options - google groups I have few Windows 2008 R2 (no SP1) servers in remote offices, mostly in Domain Controller, and many of them have problems installing ANY printer drivers. following errors show up in Event Log when adding printer driver under Print and Document Services/Print Management/Print Services/ /Drivers OR trying any other way to install drivers: EventID 215: Installing printer driver - failed, error code 0x57, HRESULT 0x80070057. See the event user data for context information. EventID 215: Installing printer driver Canon iR C2380/2550 PCL6 failed, error code 0x0, HRESULT 0x80070057. See the event user data for context information. EventID 215: Installing printer driver Canon iR C2380/2550 PCL6 failed, error code 0x490, HRESULT 0x80070057. See the event user data for context information. in this particular server case this is problem with Canon iRC 2380i printer with Canon Generic PCL6 Driver, but it seems to apply to any driver and any printer (tried different drivers, different versions, PCL, postscript, etc) I'm using 64 bit drivers that should be working on this platform. Any help will be appreciated.

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• PowerShell: New-PSDrive error handling

  - by mazebuhu

  Hello, I have a script where I mount with the command "New-PSDrive" a network drive. Now, since the script is running as a "cronjob" on a server I want to have some error detection. If for any reason the command New-PSDrive fails the script should stop executing and notify that something went wrong. I have the following code: Try { New-PSDrive -Name A -PSProvider FileSystem -Root \\server\share } Catch { ... handle error case ... } ... other code ... For testing reasons I specified a wrong server name and I get the following error "New-PSDrive : Drive root "\wrongserver\share" does not exist or it's not a folder". Which is OK since the server does not exists. But the script does not go into the Catch clause and stop. It happily continues to run and ends up in a mess since no drive is mounted :-) So my question, why? Is there any difference in Exception handling in PowerShell? I should also note that I'm a noob in PowerShell scripting. Bye, Martin

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• 4in6 tunneling (via OpenVPN?)

  - by Deshene

  I have a local network with internet access. But unfortunately IPv4 internet connection speed is limited to 1mbps, which is realy sad. Fortunately I have a native IPv6, and there is no connection speed limit over IPv6. So, in order to get a good internet connection I made a plan: connect to the VPN-service over IPv6, and pass all IPv4 traffic through IPv6 tunnel, or something like that, I think you get the idea. I suggested to use service like HideMyAss.com, but unfortunately they don't support IPv6. The question is: Is there any existing VPN service that will make my dreams come true, and is easy to use, which I could connect over PPTP or OpenVPN (I want to set up connection to VPN in my router settings). Edit: It seems like there are couple of VPN services that supports IPv6 (it's odd, but the biggest VPN services support only IPv4), and there is none providing 4in6 tunnels. So, I came to the following solution: rent a VPS with IPv6 address, and manually setup 4in6 tunnel. I'm not good at networking, never did things like that, and don't know where to start, and what should I do. The use case, as I undestand, should look like this: I connect from my home computer to the VPS via OpenVPN, and after that all my IPv4 traffic pass through IPv6 (server do the job). OpenVPN - because I want to configure VPN connection to server in my router (Asus RT-N16?). How can I achieve this?

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• PHP-FPM and APC for shared hosting?

  - by Tiffany Walker

  We are looking into finding a way to get APC to only create one cache per account / site. This can be done with Fastcgi (last update 2006…) but with Fastcgid APC will have to create multiple caches for multiple processes run by the same account. To get around this problem, we have been looking into PHP-FPM PHP process manager allows multiple PHP processes to share a single APC cache. But from what I have read (I hope I'm wrong) , even if you create a pool per process, all sites accross all pools will share the same APC cache. This brings us back to the same problem as with shared Memcached: it's not secure ! On php-fpm's site I read that you can chroot php-fpm pools and define a specific UID and GID per pool… if this is the case then shouldn't APC have to use this user and not have access to other pools cache ? An article here (in 2011) suggests that you would need to run one process per pool creating multiple launchers on different ports and different config files with one pool per config file : http://groups.drupal.org/node/198168 Is this still neceessary ? If so what would be the impact of running say 800 processes of php-fpm ? Would it be mainly memory ? If so how can I work out what the memory impact would be ? I guess that it would be better to run 800 times php-fpm then to have accounts creating multiple APC caches for a single site ? If on average an account creates a 50MB cache and creates 3 caches per account that makes 150Mb per account which makes 120GB… However if each account uses on average only 50Mb that would make 40GB We will have at least 128GB of ram on our next server so 40GB is acceptable if running 800 x PHP-FPM does not create an overhead of more than 20GB ! What do you think is PHP-FPM the best way to go to provide secure APC cache on shared hosting with a server that has a decent amount of memory ? Or should I be looking at another system ? Thanks !

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• Mouse wheel in VirtualPC (mostly) does not work on 64-bit Windows 7 RC

  - by JonStonecash

  I have recently upgraded my laptop from WinXP Pro (32-bit) to Windows 7 RC (64-bit). I have a number of VirtualPC 2007 images that I use for testing on various platforms and looking at beta software. I have installed the 64-bit version of VirtualPC. The images all work with the exception of the mouse wheel within the virtual machine. I have tried this out with WinXP Pro, Windows 7 RC, and Windows Server 2008 images. All are 32-bit and all exhibit the same behavior: a gentle rotation of the wheel does nothing; a quick rotation of the wheel sometimes gets a scroll and sometimes not. I regard this behavior as unusable as I tend to use the mouse wheel a lot. All of this worked just fine on WinXP. I have re-installed the Virtual machine additions on all of the machines. The Windows 7 RC virtual image was created after the upgrade to Windows 7 and the 64-bit version of VirtualPC (just to isolate the possibility that I had corrupted the images during the transition). I have googled, binged, and yahoo-ed. There are scattered mentions of this problem (dating back to VPC 2004) but no solutions. I am aware that I could start up one of these images and then use remote desktop connections to get access to that image. I, in fact, do just that for some development that I am doing; the mouse works just fine. This is acceptable in this case because I spend hours at a time in the development VM. These test environments are different in that I will bring up an image for just a short time: minutes rather than hours. Adding the rdc step is much more significant in these cases. Does anyone have any idea of what to do next?

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• What kind of “sysadmin stuff” should I show to students during a talk?

  - by Gregory Eric Sanderaon

  A teacher asked me If I could talk about my job as a linux sysadmin in his class. The course is called "Introduction to Operating systems" and i've been given 45 minutes to talk. The students are beginning their second year, so they've had a bit of experience with programming in different languages. What i'm like to do is show a series of hands-on examples of the kinds of things I do on a regular basis. I've already got a few ideas jotted down, but I'm afraid that they might be either too advanced or too simple for the students to appreciate. Another concern is that a topic might be too long to explain and use too much time overall. Here are a few ideas : Program deployment using version control (git in my case) filtering apache logs using grep, awk, uniq, tail A couple of bash scripts that i've made for various stuff on servers live montitoring (htop, iotop, iptraf) creating databases and assigning roles in mysql/postgresql So, are these ideas any good ? Do you have better ideas ? are the ideas too simple and should I go for more "advanced" stuff ?

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• Launching firefox on remote server causes local firefox to start instead

  - by terdon

  Right, this is strange. I am connecting from my laptop (LMDE) to a remote host (SUSE linux enterprise) using ssh -X. I want to launch a firefox instance running on the remote server so I can have access to webpages on a private network. User@RemoteMachine $ which -a firefox /usr/bin/firefox User@RemoteMachine $ /usr/bin/firefox --version Mozilla Firefox 2.0.0.2, Copyright (c) 1998 - 2007 mozilla.org User@LocalMachine $ which -a firefox /usr/bin/firefox User@LocalMachine $ /usr/bin/firefox --version Mozilla Firefox 14.0.1 Now, if firefox is not running on the local machine, everything goes as expected and executing firefox on the remote machine causes a firefox (v 2.0) window running on the remote machine to show up. However, if firefox is running on the local machine a second window of firefox 14.0.1 running on the local machine appears. I have checked top in both machines. In the 2nd case, a firefox process briefely appears on the remote machine and then disappears when the local version of firefox is launched. My questions are the following: What gives? How/why can firefox connect to its existing instance on the local machine? The remote machine appears to have access to the local machine. It, in fact, appears to have the right to execute programs on my local machine. Am I missing something or is this just weird? Is this not a security risk?

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• DNS slow after losing DNS Server

  - by Tim

  We have set up a small Windows Server 2008 R2 network with a domain controller which is also acting as the DNS server for the network (we opted to install DNS when setting up the domain). This network isn't connected to the Internet in any way, so all machines have been configured to use the IP address of the domain controller as their primary DNS and no secondary DNS server has been configured. If we shut down or unplug the network cable from the domain controller, DNS lookups become quite slow and the performance of the network suffers. For example, running a ping command using a hostname takes around 5-6 seconds to resolve the name. I presume this is because it is looking for the DNS, then falling back to some other method of resolving the names as the DNS server is now gone. All the machines have static IP addresses so we are considering just putting all entries in the HOSTS file of each machine. However, it would be nice to have a centralised DNS in case we one day change the IP of one of the machines. Is there a better way to speed this up?

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• Remote Desktop Mobile mangles barcodes coming from scanner

  - by sfonck

  We have an application here using handhelds to scan barcodes. These handhelds are actually making a remote desktop session towards a server where the application runs. Works fine. Now we have bought some new Motorola MC55's running 'Windows Mobile 6.1 Classic', and when using the application over remote desktop: it mangles the characters of the barcodes.... I already tried following things: When scanning a barcode on the MC55 itself it is displayed correctly When scanning a barcode via the remote desktop into a notepad session it is incorrect. Played with all options of the 'Remote Desktop Mobile' - no result Disabled 'autocorrect' and 'suggest words when entering text' on the input settings - no result The strange things is: a barcode which consists of only numbers gets scanned correctly the mangled characters comes through in lower case For some codes \t is mangled in between (should normally be entered after the barcode) e.g.: 'PERIN4' becomes 'ERINp4' 'MGZB' becomes 'GZB m' 'BAK664' becomes 'AK664 b' 'MAGBFA01' becomes 'AGBFmA01' '5021879949500' gets scanned correctly Final solution: Suppllier of the handhelds said the handheld was sending the characters too fast over the remote desktop connection. They changed the handheld to wait for 50ms between sending each character, which produced correct results right now. Scanning a barcode became somewhat slower but it's almost not remarkable to endusers.

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• Confusion about Kerberos, delegation and SPNs.

  - by Vilx-

  I already posted this question on SO, but the nature of it is between programming and server configuration, so I'll re-post it here as well. I'm trying to write a proof-of-concept application that performs Kerberos delegation. I've written all the code, and it seems to working (I'm authenticating fine), but the resulting security context doesn't have the ISC_REQ_DELEGATE flag set. So I'm thinking that maybe one of the endpoints (client or server) is forbidden to delegate. However I'm not authenticating against an SPN. Just one domain user against another domain user. As the SPN for InitializeSecurityContext() I'm passing "[email protected]" (which is the user account under which the server application is running). As I understand, domain users have delegation enabled by default. Anyway, I asked the admin to check, and the "account is sensitive and cannot be delegated" checkbox is off. I know that if my server was running as a NETWORK SERVICE and I used an SPN to connect to it, then I'd need the computer account in AD to have the "Trust computer for delegation" checkbox checked (off by default), but... this is not the case, right? Or is it? Also - when the checkbox in the computer account is set, do the changes take place immediately, or must I reboot the server PC or wait for a while?

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• Audio Static/Interference regardless of audio interface?

  - by Tom

  I currently am running a media center/server on a Lubuntu machine. The machine specs: Core 2 Duo Extreme EVGA SLI 680i MotherBoard 2 GB DDR2 Ram 3 Hard Drives no raid - WD Caviar Black, Green, and Samsung Spinpoint Galaxy GTX 220 1GB External USB Creative XI-FI Extreme Card 550W Power Supply This machine is hooked up through an optical cable to an ONKYO HTR340 Receiver through the XIFI card. Whenever I play any audio regardless if it is through XBMC, the default audio player, a flash video, etc, I get a horrible static sound that randomly gets louder. Here is a video of the sound: http://www.youtube.com/watch?v=SqKQkxYRVA4 This static comes in randomly, sometimes going away for short periods, but eventually always comes back. So far I have tried everything I could think of: Reinstalling OS Installing/upgrading/repairing PulseAudio/Alsa Installing alternate OSes, straight Ubuntu, Lubuntu, Xubuntu, Arch, Mint, Windows 7 Switching audio from the external card to internal Optical, audio out through HDMI, audio out through headphones Different ports on receiver (my main desktop sounds fine on the same sound system) Different optical cables Unplugging everything unnecessary from the motherboard (1 HD, 1 Stick of Ram, 1 Keyboard) Swapping out ram Swapping out the motherboard Replacing the Graphics Card (was replaced due to fan being noisy, not specifically for this problem) Different harddrives Swapping power supply Disabling onboard audio Pretty much everything short of swapping the CPU. I haven't been able to narrow down the problem and it is getting frustrating. Is it possible that the CPU is faulty and might cause a problem such as this, or that the PC case is shorting out the motherboard? Any kind of suggestions will be appreciated.

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• Toshiba Portege M400 screen rotation not working under Windows 7 x64

  - by Christi

  I have installed Windows 7 on my Toshiba Portege M400. This in itself was relatively tricky.* However, the button utilities aren't quite working for me. One of the buttons tries to launch the Toshiba Assist program, which doesn't appear to be available under Windows 7 for the M400, but this I can live without. More important is that the screen won't rotate as it is supposed to when you hold the "cancel" (X in a circle) button on the bezel. The PC is set to run "C:\Program Files (x860\Toshiba\Toshiba Rotation Utility\phtrot.exe". There is a "trot.exe" file in the same directory (the former appears to be to cause slightly different behaviour when rotation is done by press and hold). Neither of these programs rotates the screen either by using the buttons or from the command line. The screen is rotating normally when switching from tablet to laptop mode, so there does not appear to be an inherent problem with rotation. I'd just like to be able to use the buttons on the side of the screen to change the screen orientation. Windows XP used to have a "setrot" utility to do this, but that seems to have gone in Windows 7 Thanks for your help. *Just in case anyone comes looking for how to do this, you need to extract driver files from http://cdgenp01.csd.toshiba.com/content/support/downloads/util_raid_os2007252a.exe, which does not seem to be listed among the available files for the m400. This executable contains the SATA interface drivers that will need to be loaded by the installer before it can see your hard disk drive. It needs to be unpacked and the files copied to a USB key which they can then be loaded from in the install process. The utilities etc. for installation post windows install are all available from the Toshiba USA support website.

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• Explain why folder's permissions differ depending on HOW user is accessing server AFP vs SSH

  - by Meltemi

  Hoping someone can explain what is probably fairly obvious...but confuses me. Imagine two users with admin privileges on our server (Mac OS X Server 10.5). Call them joe & bob. both users are members of these groups: Staff Group ID: 20 Workgroup Group ID: 1025 Shared folder "devfolder" has sharing set as so: POSIX: Owner: joe read & write Group: admin read & write Other no access ACL: Workgroup Allow Read & write Question is why when looking at same folder does the ownership appear to change depending on who's doing the looking?!? Both looking at same folder on the server: From Joe's perspective: xserve:devfolder joe$ ls -l drwxrwxr-x 6 joe workgroup 204 May 20 19:32 app drwxrwxr-x 9 joe workgroup 306 May 20 19:32 config drwxrwxr-x 3 joe workgroup 102 May 20 19:32 db drwxrwxr-x 3 joe workgroup 102 May 20 19:32 doc drwxrwxr-x 3 joe workgroup 102 May 20 19:32 lib And from Bob's perspective (folder mounted on his machine via AFP): bobmac:devfolder bob$ ls -l drwxrwxr-x 6 bob _bob 264 May 20 19:32 app drwxrwxr-x 9 bob _bob 264 May 20 19:32 config drwxrwxr-x 3 bob _bob 264 May 20 19:32 db drwxrwxr-x 3 bob _bob 264 May 20 19:32 doc drwxrwxr-x 3 bob _bob 264 May 20 19:32 lib Now if Bob connects to server via SSH then his output is identical to Joe's, as expected. Can anyone tell me what the client is doing in this case and what should be expected when bob creates or updates files in this folder? What tools do I have to better understand this from the command line? Is this normal? Perhaps a "cleaner" way that wouldn't be confusing with "bob _bob"?!?

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• How to set shmall, shmmax, shmni, etc ... in general and for postgresql

  - by jpic

  I've used the documentation from PostgreSQL to set it for example this config: >>> cat /proc/meminfo MemTotal: 16345480 kB MemFree: 1770128 kB Buffers: 382184 kB Cached: 10432632 kB SwapCached: 0 kB Active: 9228324 kB Inactive: 4621264 kB Active(anon): 7019996 kB Inactive(anon): 548528 kB Active(file): 2208328 kB Inactive(file): 4072736 kB Unevictable: 0 kB Mlocked: 0 kB SwapTotal: 0 kB SwapFree: 0 kB Dirty: 3432 kB Writeback: 0 kB AnonPages: 3034588 kB Mapped: 4243720 kB Shmem: 4533752 kB Slab: 481728 kB SReclaimable: 440712 kB SUnreclaim: 41016 kB KernelStack: 1776 kB PageTables: 39208 kB NFS_Unstable: 0 kB Bounce: 0 kB WritebackTmp: 0 kB CommitLimit: 8172740 kB Committed_AS: 14935216 kB VmallocTotal: 34359738367 kB VmallocUsed: 399340 kB VmallocChunk: 34359334908 kB HardwareCorrupted: 0 kB AnonHugePages: 456704 kB HugePages_Total: 0 HugePages_Free: 0 HugePages_Rsvd: 0 HugePages_Surp: 0 Hugepagesize: 2048 kB DirectMap4k: 12288 kB DirectMap2M: 16680960 kB >>> ipcs -l ------ Shared Memory Limits -------- max number of segments = 4096 max seg size (kbytes) = 4316816 max total shared memory (kbytes) = 4316816 min seg size (bytes) = 1 ------ Semaphore Limits -------- max number of arrays = 128 max semaphores per array = 250 max semaphores system wide = 32000 max ops per semop call = 32 semaphore max value = 32767 ------ Messages Limits -------- max queues system wide = 31918 max size of message (bytes) = 8192 default max size of queue (bytes) = 16384 sysctl.conf extract: kernel.shmall = 1079204 kernel.shmmax = 4420419584 postgresql.conf non defaults: max_connections = 60 # (change requires restart) shared_buffers = 4GB # min 128kB work_mem = 4MB # min 64kB wal_sync_method = open_sync # the default is the first option checkpoint_segments = 16 # in logfile segments, min 1, 16MB each checkpoint_completion_target = 0.9 # checkpoint target duration, 0.0 - 1.0 effective_cache_size = 6GB Is this appropriate ? If not (or not necessarily), in which case would it be appropriate ? We did note nice performance improvements with this config, how would you improve it ? How should kernel memory management parameters be set ? Can anybody explain how to really set them from the ground up ?

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• Too much memory consumed during TFS automated build

  - by Bernard Chen

  We're running TFS 2010 Standard Edition, and we've set up an automated build to run whenever someone checks in code. We run through all of the automated tests (built with MSTest) as part of the build. We've configured the build to run the tests as a 64-bit process, but the QTAgent.exe that runs the tests grows in memory while the tests are running. It is currently reaching 8GB for the ~650 tests we have, and the process has slowed significantly when we went from 450 tests to 650 tests. When we run all of the tests in the local development environment, memory seems to be freed at least with each TestClass and never exceeds a certain level. The process of running all tests has not increased significantly in the local development environment. Is there a way to configure the build service to free up memory with each Test or each TestClass? With the way things are currently running, the build process gets very slow when we start to run out of memory on the machine. Edit: I found the MSTest invocation in the build log and ran it manually and saw the same behavior of runaway memory. I removed the /publish, /publishbuild, /teamproject, /platform, and /flavor parameters from the invocation of MSTest, in case the test runner was holding onto results until the end, but the behavior didn't change. I ran the same command line on a dev box, separate from the build server, and the memory freed up frequently. It seems there must be something wrong/different about the build server that is causing it to behave different, but I'm stumped where to look. I've looked at qtagent.exe.config, mstest.exe.config, versions of both executables. What else might affect this?

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• "Unable to open MRTG log file" error with nagios and mrtg

  - by Simone Magnaschi

  We have a strange issue with our setup of icinga / nagios and mrtg. Icinga is working great and has no problem, it can monitor basically everything without issues. We setup mrtg to gather bandwith data from our routers and switches. MRTG is working fine: it stores the log data in the /var/www/mrtg/ directory and displays the graph data via web. We assume so MRTG is doing great. We tried to setup bandwidth checks in nagios: define service{ use generic-service ; Inherit values from a template host_name zywall-agora service_description ZYWALL AGORA TRAFFICO check_command check_local_mrtgtraf!/var/www/mrtg/x.x.x.x_2.log!AVG!1000000,2000000!5000000,5000000!1000 check_interval 1 ; Check the service every 1 minute under normal conditions retry_interval 1 ; Re-check every minute until its final/hard state is determined } Where /var/www/mrtg/x.x.x.x_2.log is the correct log path file. We keep on getting Unable to open MRTG log file error in the test result in icinga web interface. We tried everything: give ownership to user nagios or icinga to the log file give chmod 777 to the file try to copy the file in another directory and give it full permission Same error. The strange thing is that if we use the command that nagios generate in a bash session the command works like a charm: /usr/lib64/nagios/plugins/check_mrtgtraf -F /var/www/mrtg/x.x.x.x_2.log -a AVG -w 10,20 -c 5000000,5000000 -e 10 Result: Traffic WARNING - Avg. In = 17.9 KB/s, Avg. Out = 5.0 KB/s|in=17.877930KB/s;10.000000;5000000.000000;0.000000 out=5.000000KB/s;20.000000;5000000.000000;0.000000 We ran that command line as root, as user nagios and as user icinga and all three worked ok. We thought that the command that nagios perform maybe has something wrong in it, so we debugged nagios but we found out that the generated command from nagios is the same as above. Searching on google for these kind of problem returns only issues of systems where mrtg is not installed or issues with the wrong path to the log file, but these seems not to be our case. We are stuck, can somebody help?

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