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• Mac OS X Server add server user

  - by Meltemi

  What's the recommended way to add a user to Mac OS X Server that doesn't need all the hoopla associated with Workgroup Manager? There are many users pre-configured in Mac OS X Server (www, root, ldapadmin, etc.) that don't have "Full Name" or mail accounts, etc. I'd like to create a 'svn' user to be the owner of our Subversion Repository as per this tutorial: If you've decided to use either Apache or stock svnserve, create a single svn user on your system and run the server process as that user. Be sure to make the repository directory wholly owned by the svn user as well. From a security point of view, this keeps the repository data nicely siloed and protected by operating system filesystem permissions, changeable by only the Sub- version server process itself. Wondering if there's a way outside of WorkgroupManager and OpenDirectory as this account will be entirely server based. Is this still sound advice under OS X Server? If so what's the easiest way to create the user (Mac OS X Server doesn't seem to respond to useradd).

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• Acer Aspire 3680 Wireless Signal Problem

  - by SHiNKiROU

  I am using Acer Aspire 3680. I recently reinstalled Windows Vista, and the wireless did not work by default. I installed the "Atheros Wireless LAN Driver" on this site: http://support.acer-euro.com/drivers/notebook/as_3680.html The result, the wireless APs are successfully scanned. However, when I tried to join a network, even with 5/5 signal, an error message showed up diagnosing signal too little. I restarted as Ubuntu, and wireless worked perfectly, with same computer position. Even more confusing, When I moved to the kitchen (2 meters close to the router), the wireless connected, when I move back to my room, wireless failed on Vista and worked on Ubuntu. It is clearly the driver problem. Acer laptops seems come with pre-installed drivers, but after re-installation, they are all gone. (I can't find the original Acer backup disc) Please do not answer "move closer to the AP" and something related to "interference", as wireless worked with Ubuntu's default driver.

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• How can I see logs in a server after a kernel panic hang ?

  - by Low Kian Seong

  I am running a production gentoo Linux machine, and recently there was a situation where the server hung in my co-located premises and when I got there I noticed that the server was hung on what appeared to be a kernel panic hang. I rebooted the machine with a hard reboot and was disappointed to find out that I could not find a shred of evidence anywhere on why the machine hung. Is it true that when I do a hard reboot the messages itself will get lost or is there a setting I can do somewhere say in syslog-ng or maybe in sysctl to at least preserve the error log so that I can prevent such mishaps from happening in the future ? I am running a 2.6.x kernel by the way. Thanks in advance.

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• Debian Lenny - network interfaces(eth) are in DOWN state

  - by pachanga

  Folks, I'm facing a very weird problem with one of my production servers(it's Debian Lenny) - after reboot network interfaces(eth0,eth1) are in DOWN state. Looks like an Intel based networking adapter is installed on the server, lspci lists it as follows: Ethernet controller: Intel Corporation Device 10c9 (rev 01) The kernel driver responsible for this adapter is "igb". I tried "modprobe -r igb && modprobe igb", network interfaces first disappear then appear, but they are in DOWN state again. What could go wrong? It used to be working just fine. How can this be fixed?

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• How to proceed setting up a secondary mysql linux slave?

  - by Algorist

  I have a mysql database master and slave in production. I want to setup additional mysql slave. There is around 15 Terabyte of data in the database and there are MYISAM and InnoDB tables in the database. I am thinking of below options: Shutdown master database and copy the mysql data folder to secondary slave. Can Innodb tables be copied like this? Run flush table with read lock, scp the file to new slave and unlock the table and this is possible for myisam tables, can I do the same for innodb tables too? Thanks for looking at the question.

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• Apache service hung and incoming requests not accepted

  - by Gnanam

  Hi, My production server is running Apache v2.2.4 with mod_mono v1.2.4 on CentOS release 5.2 (Final). Suddenly, Apache service hung during normal usage time (approx. 1 pm EDT). Traffic is not too high at this time. This is the first time we're noticing this kind of behaviour in our server. I noticed from access log that even subsequent requests are also not received, even though there were incoming requests. I then manually tried to invoke my application call from web browser, it never returned successfully but it was still loading. I found no unusual behaviour/activity in: 1) Apache access_log and error_log 2) No kernel level errors found in /var/log/messages I've no other option but ended up restarting Apache service. Any idea on what would cause Apache to hang and thereby not allowing subsequent incoming requests? How do I debug/diagnose when this happens next time? Experts advice/recommendation on this are highly appreciated.

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• OpenAFS on Fedora/CentOS

  - by Michael Pliskin

  I am trying to see if OpenAFS fits my needs as a distributed filesystem and is a bit stuck. There are docs but they're all quite hard to understand, so asking for some expert advice here. My questions: which version to install? I need windows client support so I need 1.5 - right? But it is not stable.. Or is it? And don't see any pre-built rpms for it, so compiling from sources? tried to compile and it worked but it created a non-"mp" kernel module while my kernel needs an mp one - how to workaround that? do I really need a new fresh partition to start with or I can re-use an existing one and just make it available via afp? any nice HOWTOs around?

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• Setting-up Windows Server 2003 as an L2TP/IPSEC VPN server

  - by andyjohnson

  I'm looking for a pointer to step-by-step instructions for setting-up a Win Server 2003 Std box as a L2TP/IPSEC VPN server. I don't need to use certificates - pre-shared key is sufficient - and the server isn't on a domain. All the sources of information I've found assume a level of sysadmin experience that I don't have - which is why I'm looking for a step-by-step description. I'm a experienced developer, not an IT person, but I have what I'd guess is intermediate level experience of configuring/administering small-scale servers, and have set-up OpenVPN-based VPNs on Windows.

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• Monitoring mongrel with monit

  - by matnagel

  I wrote a monit.d file for mongrels which works in this version: check process redmine with pidfile /home/redmine/service/redmine.pid group webservice start program = "/usr/bin/mongrel_rails start -p 41328 -e production -d --pid /home/redmine/service/redmine.pid --user redmine --group redmine -a 127.0.0.1 -c /home/redmine/app" stop program = "/usr/bin/mongrel_rails stop --pid /home/redmine/service/redmine.pid -c /home/redmine/app && rm /home/redmine/service/redmine.pid > /dev/null 2>&1 if cpu greater 50% for 2 cycles then alert if cpu greater 80% for 3 cycles then restart if totalmem greater 60.0 MB for 5 cycles then restart if loadavg (5min) greater 4 for 8 cycles then restart if 3 restarts within 5 cycles then timeout $ Checking monit control file syntax... $ Control file syntax OK I want to also monitor the http response, so I add this line at the end: if failed port 41328 protocol http with timeout 10 seconds then restart Now monit complains: $ Checking monit control file syntax... $ /etc/monit.d/redmine:16: Error: exceeded maximum number of program arguments 'http' $ ERROR: CHECK MONIT CONFIG FILE SYNTAX How do I correctly monitor the port?

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• Should EC2 server self register or have admin server

  - by hortitude

  I'm creating AWS servers using chef. I am also planning on enabling auto-scaling. While we have automatic monitoring setup already (server density or nagios etc), I was also going to setup the cloud watch alarm for the status check on the server. This led me down the path of trying to decide whether to install the ec2-command-line tools on the server itself (which then requires me to install java on the servers -- despite no other need for Java in our environment) or to possible have an "admin" box that will check periodically for servers and make sure they have their alarms set. I expect this paradigm to carry over to other things we want to configure (perhaps ensuring that termination protection is setup on production servers?). Any thoughts as to why to go one direction or another?

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• How can I repair the boot loader on my laptop?

  - by zbalata

  I had removed my HD from a Dell laptop and accessed it with an external HD port on another computer. Though after returning it to the Dell laptop, it will no longer boot. The PC came pre-installed with Windows 7 and I do not have an installation disk. None of the contents of the original install have been removed or modified. If I use another laptop running Windows 7 to create a repair/recovery disk, would I be able to use it on my Dell to repair the boot sector? How can I repair the bootmgr? It's frustrating knowing there's a perfectly good operating system there that wont boot. Thanks for your time!

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• Duplicate incoming TCP traffic on Debian Squeeze

  - by Erwan Queffélec

  I have to test a homebrew server that accepts a lot of incoming TCP traffic on a single port. The protocol is homebrew as well. For testing purposes, I'd like to send this traffic both : - to the production server (say, listening on port 12345) - to the test server (say, listening on port 23456) My clients apps are "dumb" : they never read data back, and the server never replies anyway, my server only accepts connections, and do statistical computations and store/forward/service both raw and computed data. Actually, client apps and hardware are so simple there is no way I can tell clients to send their stream on both servers... And using "fake" clients is not good enough. What could be the simplest solution ? I can of course write an intermediary app that just copy incoming data and send it back to the testing server, pretending to be the client. I have a single server running Squeeze and have total control over it. Thanks in advance for your replies.

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• Squid Proxy Antivirus - Recommendations / Performance

  - by Jon Rhoades

  Due to our user's increasing expertise at downloading virus and the like, we are investigating adding Antivirus to our Squid proxy. A casual Google reveals several free and one paid: HAVP squid-vscan Viralator Safe Squid (commercial) None of the 'free' ones have reached v1 yet, nor do any inspire huge confidence form their websites (although of course I would rather they spent their time on the app rather than their website!). Does anybody have experience with any of these (or any other similar apps). If so are they suitable for a production network with 400ish concurrent users, and what sort of CPU/RAM requirements does it have?

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• HTTP Range request rejected

  - by Dan

  I am trying to understand why my production environment might be disallowing HTTP RANGE requests. I have a pool of W2K8x64/IIS7 servers behind a pair of Netscaler 9000s. I compose the following request in Fiddler: http://myorigin.example.com/file.flv User-Agent: Fiddler Host: myorigin.example.com Range: bytes=40000-60000 The response looks like: HTTP/1.1 200 OK Cache-Control: public Content-Type: video/x-flv Expires: Thu, 24 Jun 2010 18:23:53 GMT Last-Modified: Sat, 11 Apr 2009 00:16:14 GMT Accept-Ranges: none ETag: f9d5c718-e148-4225-9ca6-d1f91a2a3c08-_633749805744270000 Server: Microsoft-IIS/7.0 Edge-Control: max-age=2592000 X-Powered-By: ASP.NET Date: Tue, 25 May 2010 18:23:53 GMT Content-Length: 443668 "Accept-Ranges: none" tells me that the range request was rejected, but I am not sure where/why as IIS7 accepts Range by default. Could the 'scalers be shooting it down? Thanks, Dan

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• Which is better for running Ubuntu and other Linux OSes, Chromebook or Windows, why? [on hold]

  - by Serge

  I'm learning programming and I would like to switch to a Linux OS, perhaps Ubuntu, to continue this, but the current machine is generally getting pretty old and slow and Windows is the least favorite option for production, and I can manage getting something new right around the price range of the nicest Chromebook on the market right now. However, I have compared specs of HP Chromebook 14 with those of regular PC laptops that roughly cost the same, and the latter consistently have approximately the same and sometimes higher (like the processor speed) specs. Yet usage of Chromebooks for this purpose is pretty widespread nowadays. Is this because they were initially built for a Linux OS - and is it really THAT crucial - or are there other major factors at play here?

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• Process spawned by exec-maven-plugin blocks the maven process

  - by Arnab Biswas

  I am trying to execute the following scenario using maven : pre-integration-phase : Start a java based application using a main class (using exec-maven-plugin) integration-phase : Run the integration test cases (using maven-failsafe-plugin) post-integration-phase: Stop the application gracefully (using exec-maven-plugin) Here is pom.xml snip: <plugins> <plugin> <groupId>org.codehaus.mojo</groupId> <artifactId>exec-maven-plugin</artifactId> <version>1.2.1</version> <executions> <execution> <id>launch-myApp</id> <phase>pre-integration-test</phase> <goals> <goal>exec</goal> </goals> </execution> </executions> <configuration> <executable>java</executable> <arguments> <argument>-DMY_APP_HOME=/usr/home/target/local</argument> <argument>-Djava.library.path=/usr/home/other/lib</argument> <argument>-classpath</argument> <classpath/> <argument>com.foo.MyApp</argument> </arguments> </configuration> </plugin> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-failsafe-plugin</artifactId> <version>2.12</version> <executions> <execution> <goals> <goal>integration-test</goal> <goal>verify</goal> </goals> </execution> </executions> <configuration> <forkMode>always</forkMode> </configuration> </plugin> </plugins> If I execute mvn post-integration-test, my application is getting started as a child process of the maven process, but the application process is blocking the maven process from executing the integration tests which comes in the next phase. Later I found that there is a bug (or missing functionality?) in maven exec plugin, because of which the application process blocks the maven process. To address this issue, I have encapsulated the invocation of MyApp.java in a shell script and then appended “/dev/null 2&1 &” to spawn a separate background process. Here is the snip (this is just a snip and not the actual one) from runTest.sh: java - DMY_APP_HOME =$2 com.foo.MyApp > /dev/null 2>&1 & Although this solves my issue, is there any other way to do it? Am I missing any argument for exec-maven-plugin?

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• Internet Connection Sharing on OSX causes delayed web requests

  - by Vanthel

  I have an iMac connected to my router via WiFi, and a PC connected by ethernet to the iMac. The iMac is sharing its connection. I've never had a problem with this in the past (pre Lion anyway) but now all web page requests take an eon to resolve on the iMac (they are instant on the PC). It suggests to me the iMac is attempting to resolve it through the PC first every time? I've tried reordering the connections in the network settings but that made no difference.

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• How do I minor upgrade MySQL on Windows?

  - by TruMan1

  I currently have MySQL 5.1.35 installed on a Windows 2008 server via the MSI installer. I need to upgrade to the latest 5.1.44 to fix a bug, but docs were not clear on how to do this. I ran the MSI installer, but it did not give me any upgrade option so I quit it. I am weary because it's a production machine with many PHP websites running on it. Also, my data directory is not the default one, it's kept on another partition. How can I upgrade it? Thanks for any help.

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• Debian server doesn't free memory after backup

  - by stan31337

  I have production server that is running Debian 6.0.6 Squeeze #uname -a Linux debsrv 2.6.32-5-xen-amd64 #1 SMP Sun Sep 23 13:49:30 UTC 2012 x86_64 GNU/Linux Every day cron executes backup script as root: #crontab -e 0 5 * * * /root/sites_backup.sh > /dev/null 2>&1 #nano /root/sites_backup.sh #!/bin/bash str=`date +%Y-%m-%d-%H-%M-%S` tar pzcf /home/backups/sites/mysite-$str.tar.gz /var/sites/mysite/public_html/www mysqldump -u mysite -pmypass mysite | gzip -9 > /home/backups/sites/mysite-$str.sql.gz cd /home/backups/sites/ sha512sum mysite-$str* > /home/backups/sites/mysite-$str.tar.gz.DIGESTS cd ~ Everything works perfectly, but I notice that Munin's memory graph shows increase of cache and buffers after backup. Then I just download backup files and delete them. After deletion Munin's memory graph returns cache and buffers to the state that was before backup. Here's Munin graph: Unfortunately I don't have enough rep to add image here. So here's a link:

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• One bigger Virtual Machine in Cloud

  - by flyer

  I just setup virtual machines on one hardware with Vagrant (this is just a test environment, not production!). I want to use a Puppet to configure them and next try to setup OpenStack. I am not sure If I am understanding how this should look at the end. Is it possible to have below architecture with OpenStack after all where I will run one Virtual Machine with e.g. 12 cores? ------------------------------- | VM (12c) | ------------------------------- | NOVA | NOVA | NOVA | ------------------------------- | OpenStack | ------------------------------- | VM (4c) | VM (4c) | VM (4c) | ------------------------------- | Bare Metal (8c) | ------------------------------- I need this information to have a bigger picture to continue.

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• Replace Whole Site by FTP

  - by Sam Machin

  Hi There, I've got a set of tools which periodically (about once a day) generate a complete set of static HTML pages for a site with associated folder structure etc. I then need to put those file onto the production server, my problem is that the server runs IIS(6 I think) and I only have regular FTP access. I need a way to automate the process of publishing the new site and it needs to a total replacement of the files each time its published, eg delete the whole folder & contents then put the new ones up. My source server is a ubuntu machine and I've got total control at that end, I have tried using CurlFTpFS but it seems to be too slow for what I'm trying to do and locks up. Rgds Sam

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• 1 TB hdd and no space to create a partition for linux !

  - by rangalo

  I have a brand new Acer aspire 5811 with core i5 processor and all that. There is windows 7 Home Premium pre-installed on it. I want to install arch and setup a dual boot system. The problem is: Windows shows 4 partitions 14 MB UNKNOWN recovery partition 100MB NTFS System Reserved partition for Windows 7 448GB NTFS Windows 7 system partition 468GB NTFS Data partition for windows 7 But GpartedLive cd and also arch setup show 5 partitions 938Kb UNKOWN system reserved partition 14 MB UNKNOWN recovery partition 100MB NTFS System Reserved partition for Windows 7 448GB NTFS Windows 7 system partition 468GB unusable space Because of this, I cannot create another primary partition. Can any body guide me about how should I go for creating partition for installing arch ? Note: I need to keep windows 7 working. regards.

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• Unix Server Partitioning & Filesystem Layout

  - by user1717735

  There's a lot of contradictory information about Unix server partitioning out on the internet, so I need some advice on how to proceed. So far, on the servers I in our test environment I didn't really care about partitioning and I configured a single monolithic / plus a swap partition. This partitioning scheme doesn't seem like a good idea for our production servers. I have found a good starting point here, but it seems very vague on the details. Basically I have a server on which I will be running a basic LAMP stack (Apache, PHP, and MySQL). It will have to handle file uploads (up to 2GB). The system has a 2TB RAID 1 array. I plan to set : / 100GB /var 1000GB (apache files and mysql files will be here), /tmp 800GB (handles the php tmp file) /home 96GB swap 4GB Does this sound sane, or am I over-complicating things?

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• Permissions for Scheduled Tasks on a Domain Controller

  - by silmaril8n

  I'm trying to run a Scheduled Task on a 2008 R2 Domain Controller and all was well until I set it into the production environment. I'm running the task as a Domain User that's defined in the "Log on as a batch job" setting. For giggles I also added the account to "Allow log on locally" after the former failed. When I'm prompted for the password after setting up the task I receive the error: "An error has occurred for the task ########. Error message: The following error was reported: Logon failure: the user has not been granted the requested logon type at this computer.." I'm thinking that because this a DC that maybe it needs something else?

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• HP ProLiant Smart Array "lock up" code 0x11

  - by ewwhite

  I've a ProLiant DL580 G7 server that experienced a storage subsystem failure during production. The system appeared available and responded to pings, but all I/O access stalled (the system load must have been 100+). The ASR did not trigger at the specified watchdog timeout. I had to force a reboot from the ILO. During POST, I received the following error: A controller failure event occurred prior to this power-up. (Previous lock up code = 0x11) I haven't pulled the ADU report yet, but I'm curious as to what this error actually means. I was not responsible for the the installation, but can see that the firmware is very old. But if there's anything else I should know about the error, I'd like to know for the post-mortem report. edit - I should add that the server had 95 days of uptime prior to the lock up.

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