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• Brand new Seagate HDD has high raw read error rate

  - by kpax

  I've just purchased a brand new Seagate ST31000524AS 1TB HDD. Manufacture date shows as January 2012 (yes that's as new as new can get), so must be one of the new batches from the post-flood Thailand. Anyway, I downloaded a copy of Active Hard Disk Monitor tool to check the S.M.A.R.T. parameters and I find the parameter Raw Read Error Rate is very low. Should I be worried? Will this rectify over time? This hdd is just 7 hours old; what gives? Edit: I meant high raw read error rate - Title updated accordingly

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• Staggering java linux process startup to prevent OOM

  - by ctennis

  I am running a number of java processes on a single Linux machine. From a memory and computing standpoint, everything is fine when things are static. However, periodically we use a configuration management package up upgrade the jar or war files, and restart the java process. The problem is, that is restarts them all relatively quickly, and so we get 10 or so java VMs restarting all at the same time (we use daemontools for the service stops/starts), which wreaks havoc on the machine, in terms of OOMs or just really slow. This is because it's spawning the JVM 10x at the same time. Other than trying to stagger the startups, is there a smarter way of handling this? Maybe a sysctl tuning performance parameters, or a JVM parameter?

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• icacls, Network Service, and setting ACLs on Windows Server 2008

  - by Ted

  Setting ACLs on Windows Server 2008 via the command line is giving me some problems. As per http://web2.minasi.com/forum/topic.asp?TOPIC%5FID=26907 I've tried all sorts of variations: C:\Windows\system32icacls "D:\Websites\site.com\Web\bin*" /grant 'NT A uthority\NETWORK SERVICE: (OI) (CI)M' C:\Windows\system32icacls "D:\Websites\site.com\Web\bin*" /grant "NETWORK SERVICE": (OI) (CI)M And all variations in between. However, each try leads to i.e. "Invalid parameter "'NETWORK'"" depending on the variation above. As per http://technet.microsoft.com/en-us/library/cc753525%28WS.10%29.aspx (see in comments), it appears that others have experienced the same issue where the same command works on Windows 7/Vista/etc., but not on Windows Server 2008. What's the best way to apply permissions to Network Service account on a directory and/or files via the command line in Windows Server 2008? Especially as there's no way to do multiple file permissions at once via the GUI (see http://serverfault.com/questions/30991/windows-server-2008-change-security-settings-for-multiple-files-at-once).

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• Schedule a batch file with parameters containing spaces

  - by Danilo Brambilla

  Hi, I need to schedule a task in Windows Server 2003 that executes this script that deletes files older that n days in the specified folder. The script needs 3 parameters: %1 path to folder where files need to be deleted %2 file names (es. *.log) %3 number of days @echo off forfiles -p %1 -s -m %2 -d -%3 -c "cmd /c del /q @path" The script works fine if the first parameter has no spaces inside. This is an example of parameters that work: "C:\Program Files\SCRIPT\DeleteFilesOlderThanXDays.cmd" N:\FOLDER\FOLDER *.zip 60 This is an example that does not work: "C:\Program Files\SCRIPT\DeleteFilesOlderThanXDays.cmd" N:\Program Files\LOG *.zip 60 This does not work too: "C:\Program Files\SCRIPT\DeleteFilesOlderThanXDays.cmd" "N:\Program Files\LOG" *.zip 60 I think it would be a quotes problem but I can't figure out the solution. I'd like not to insert values directly into the script if possible Thank you all for help

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• How can transfer zabbix item from different hosts and save item statistic

  - by Stepchik

  There are two server's (srv1 and srv2). Mysql server has been installed on which of them. Srv1 mysql contains database (db1). Zabbix-server get statistic throw configured agent user parameter (https://www.zabbix.com/documentation/2.0/manual/config/items/userparameters). Yesterday i has been copyed database db1 from mysql srv1 to mysql srv2. I can clone zabbix server item (https://www.zabbix.com/documentation/2.0/manual/config/items) to srv2, but lost all srv1 db1 statistic. Can you advice how keep them?

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• frequent errors with subversion repository on fat32 on USB memory stick

  - by sal

  I keep a copy of a Subversion Repository on a USB memory stick that is formatted with FAT32. I am using TortoiseSVN on XP and command line svn 1.6.x on Ubuntu and OSX with this memory stick. I notice that I need to do an svn cleanup just about every time or updates and commits will not work. I routinely have errors with .lock and *.svn/text-base/** files getting corrupted. Errors tend to be parameter is incorrect or lock file can not be read Sometimes svn cleanup works and sometimes chflags -R nouchg * Is there anything I can do to prevent this?

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• How do I make a privileged port non-privileged in Redhat 5?

  - by Jason Thompson

  So I have a RedHat 5 box that I'm wanting to run an application that I wrote that implements SLP. SLP uses port 427 for answering service queries. My understanding is that ports below 1024 are "privileged" and thus cannot be bound to by anyone that's not root. I cannot run this application as root as it is launched via tomcat. One creative solution I really like was simply writing an iptables rule to route the privileged port to a non-privileged. In my proof of concept tests, this works wonderfully. Unfortunately, it would be greatly (and understandably) desired by the powers if my application did not require screwing around with iptables upon installation. So I heard a rumor and cannot find anything to verify this that there was some sort of command or parameter that could be set to make any port I want be non-privileged. Is this true? If so, how is this done? Thanks!

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• OpenVPN route missing

  - by dajuric

  I can connect to an OpenVPN server from Windows without any problems. But when I try to connect from Ubuntu 12.04 (start OpenVPN) I receive the following: OpenVPN needs a gateway parameter for a --route option and no default was specified by either --route-gateway or --ifconfig options SERVER IP: 161.53.X.X internal network: 10.0.0.0 / 8 What I need to do ? client configuration: client dev tap proto udp remote 161.53.X.X 1194 resolv-retry infinite nobind ca ca.crt cert client.crt key client.key ns-cert-type server comp-lzo verb 3 server conf: local 161.53.X.X port 1194 proto udp dev tap dev-node OpenVPN ca ca.crt cert server.crt key server.key # This file should be kept secret dh dh1024.pem # DHCP leases addresses to clients server-bridge # Push routes to the client to allow it # to reach other private subnets behind # the server. Remember that these # private subnets will also need # to know to route the OpenVPN client # address pool (10.8.0.0/255.255.255.0) # back to the OpenVPN server. push "route 10.0.0.1 255.255.0.0" client-to-client duplicate-cn keepalive 10 120 comp-lzo verb 6

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• Samba as a PDC and offline authentication

  - by Aimé Barteaux

  Say I have a Windows laptop which has been connected to a domain. The domain has a Samba server as a PDC. Now say that I move the laptop outside of the network (the network is completely inaccessible). Will I be able to logon into accounts I have accessed before on the laptop (through GINA)? Update: Looking at the smb.comf documentation I noticed the setting winbind offline logon: This parameter is designed to control whether Winbind should allow to login with the pam_winbind module using Cached Credentials. If enabled, winbindd will store user credentials from successful logins encrypted in a local cache.. To me it looks like this solves the issue but can anyone else confirm it and/or point out if any additional values need to be set?

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• What are best monitoring tool customizable for cluster / distributed system?

  - by Adil

  I am working on a system having multiple servers. I am interested in monitoring some server specific data like CPU/memory usage, disk/filesystem usage, network traffic, system load etc. and some other my process specific data. What are available open source that can serve my purpose? If it provides to customize the parameter to be monitored and monitor your own data by creating plugin / agent. Any suggestions? I heard of Nagios, Zabbix and Pandora but not sure if they provide such interface.

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• Setting subversion "password-stores" does nothing?

  - by Coderer

  The Subversion documentation says that I can set a parameter in ~/.subversion/config like [auths] password-stores = gnome-keyring to have it cache my certificate password in gnome-keyring. I set the option, and nothing happens -- no error messages, no change in behavior, nothing. Maybe I'm missing a log somewhere? I know subversion has to be compiled to support this but AFAIK I'm using the RPM version, which (they say...) ships with it rolled in. Is there a way to check whether my binary supports keyring? Shouldn't it say something if it doesn't?

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• Windows media player 12 not launching from custom program

  - by Supertrolly

  There is a program we use for testing that calls windows media player and plays a media file. The problem is that windows media player fails to load unless you open and close it before starting the program. After that the program will open it every time without a hitch but after a reboot it is lost and you must do it again. My question is what could be voilate setting could windows media player have that would be lost on a reboot? I have tried programs like Regshot to capture changes to the registry that might be delated on reboot. The code for the program is very straight forward simply calling windows media player with a parameter with the media to play. Using process montior I have determined that is is crashing shortly after the program executes it. I am at a lost on this problem as I can not find what if anything it is changing to run windows media player.

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• Nginx proxy to Apache - resolve HTTP ORIGIN

  - by Fratyr

  I have a server setup with nginx serving static content and proxy all PHP/dynamic requests to apache on 127.0.0.1 I'm building an API for my databases, and I need to allow clients by their origin (domain name), rather than just IP. Based on CORS rules. So when I send an HTTP header header("Access-Control-Allow-Origin: www.client-requesting.myapi.com"); from my API server, I have to tell it which origin I allow, otherwise client side requests won't work to my API due to same-origin policy. The question is how can I know which domain name (if any) called my API? What should be the nginx and apache configuration to pass the origin parameter? I tried to google, and all I found is some possible solution with mod_rpaf, but I wanted to be sure. Thanks!

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• Power Shell does not like command

  - by Campo

  Any ideas what I did wrong here? I copied this script from a tutorial and get this error.... PS C:\Windows\system32> Get-Service | Where-Object ($_.status -eq "running") Where-Object : Cannot bind parameter 'FilterScript'. Cannot convert value "False" to type "System.Management.Automation .ScriptBlock". Error: "Invalid cast from 'System.Boolean' to 'System.Management.Automation.ScriptBlock'." At line:1 char:27 + Get-Service | Where-Object <<<< ($_.status -eq "running") + CategoryInfo : InvalidArgument: (:) [Where-Object], ParameterBindingException + FullyQualifiedErrorId : CannotConvertArgumentNoMessage,Microsoft.PowerShell.Commands.WhereObjectCommand

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• asterisk incoming/miss call notification (to skype)

  - by tike

  My environment: Centos 5.6, Asterisk with freepbx , skype i.e.sends message with parameter skype.sh skype_user message. Now i wanted to send skype notification so that my asterisk server notification are sent to skype rather than email (or to both skype and email). I know, there is voicemail.conf, voicemail_general and vm_email.inc, which has these body created. vm_email.inc emailbody=${VM_NAME},\n\nThere is a new voicemail in mailbox ${VM_MAILBOX} But i dont see where is something like "mail" command. What my thought to do is: instead of saying "mailcmd" pass system ( /path/to/script) and it would simply send message as rest is already configured. Any suggestion where i could run script rather than sending email Or Executing script on every incoming call, so that i could send as notification on every call over the Skype. (however, ultimate goal is to achieve miss call notification or voice mail notification over Skype.)

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• EC2 hostname ubuntu and ejabberd

  - by aelbaz

  I have questions related to the host name in Ubuntu EC2 instances. I have a IPS elastics for hosts that want to be seen from the internet and I have pointed out in the DNS entries with the computer name to those ips. For example, for elastic IP 11.11.11.11 DNS I added my computer name www.example.com. But I also want to rename the machines which they have, because it is a parameter of the service running on them (ejabberd server). EC2 instances are restarted when changing the host name, and seen on the client requesting dhcp hostname to dhcp Amazon. My question is ... What is the safest method to change the hostname: dhcp client modify, insert the command in rc.local, etc. ..? Could I have a problem with the internal resolution of traffic between EC2 instances? thanks

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• High shmmax value in Redhat 6.3

  - by xpapad

  We are using Redhat 6.3 with 30G RAM to host our Postgres server. The (default) shmmax value is 68,719,476,736 In some forums I have read that having an shmmax value larger than the RAM causes extensive paging, but in the Redhat forums it warns against changing a kernel parameter that is already configured to a value larger than the minimum requirements for an environment. In ServerFault I've read that this probably has no impact. So is there any impact of having shmmax value RAM in a DB server, or the kernel understands this and handles it appropriately? Thanks

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• How to disable 3G USB Modem internal storage from being loaded by linux kernel?

  - by Krystian

  Hi, I've got a problem with my 3G modem [Huawei E122]. It has internal storage and kernel assigns a device [/dev/sdX] to it. Because of that, every second time my machine will not boot - kernel panic - as my usb hdd gets assigned /dev/sdb instead of /dev/sda. I cannot use LABEL nor UUID in root= kernel parameter, as it is only available when using initrd, and I can't use it - I am using Debian on my router - mips architecture machine. I have to prevent this from happening, as my router has to start everyday and I have to be sure it works ok. I don't have physical access to restart it when something goes wrong. I don't use my modem internal storage, there's no SD card inserted. However kernel detects the reader and loads it. I can not prevent loading od usb drivers since my hdd is on USB as well. I will appreciate any ideas.

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• MS Access Query Criteria Issue

  - by xxl3ww

  Currently I have a MS Access database query that has a field named FedEXDetTotal that totals 9 FedEX charge fields. I have another field that is from our inhouse system called "Total Charge". This is just a normal number field. I have created another Field in this query Diff: [FedEXDetTotal]-[Total Charge] This tells me the difference between the Fedex charge and what we actually charged. Everything works OK with this, but when I try to put the criteria 5 for the Diff field, when I run the query, I get a prompt saying "Enter Parameter Value FedEXDetTotal". Why is Access doing this? How do I get around this? I'm trying to start out with something simple(5), but what I really want is [Forms]![Dis].[txtbox_Diff].

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• nginx static file buffer

  - by Philip

  I have a nfs which several frontend-servers are connected to for making the files stored on the nfs available for http downloads. It looks like I have problems with the way apache is serving the files, there seems to be a very small buffer or no buffer at all which results in a lot disk seeks. I did some testing with loading the whole requested file into memory at once and serve it to the client from memory. With this technique I need less disk seeks for a download stream. Since I don't want to implement this by myself for production use I thought that I could maybe use nginx for that because the documentation says that it uses buffers for static file serving. Is it possible to increase the buffer size to a few mb, if so which config parameter do I have to change for this? Has anyone experience with large buffers for static file serving? Is there a better way to reduce disk seeks?

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• How to pass parameters to a function?

  - by sbi

  I need to process an SVN working copy in a PS script, but I have trouble passing arguments to functions. Here's what I have: function foo($arg1, $arg2) { echo $arg1 echo $arg2.FullName } echo "0: $($args[0])" echo "1: $($args[1])" $items = get-childitem $args[1] $items | foreach-object -process {foo $args[0] $_} I want to pass $arg[0] as $arg1 to foo, and $arg[1] as $arg2. However, it doesn't work, for some reason $arg1 is always empty: PS C:\Users\sbi> .\test.ps1 blah .\Dropbox 0: blah 1: .\Dropbox C:\Users\sbi\Dropbox\Photos C:\Users\sbi\Dropbox\Public C:\Users\sbi\Dropbox\sbi PS C:\Users\sbi> Note: The "blah"parameter isn't passed as $arg1. I am absolutely sure this is something hilariously simple (I only just started with doing PS and still feel very clumsy), but I have banged my head against this for more than an hour now, and I can't find anything.

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• postgresql 9.1 Multiple Cluster on same host

  - by user1272305

  I have 2 cluster databases, running on the same host, Ubuntu. My fist database port is set to default but my second database port is set to 5433 in the postgresql.conf file. While everything is ok with local connections, I cannot connect using any of my tools to the second database with port 5433, including pgAdmin. Please help. Any parameter that I need to modify for the new database with port 5433? netstat -an | grep 5433 shows, tcp 0 0 0.0.0.0:5433 0.0.0.0:* LISTEN tcp6 0 0 :::5433 :::* LISTEN unix 2 [ ACC ] STREAM LISTENING 72842 /var/run/postgresql/.s.PGSQL.5433 iptables -L shows, Chain INPUT (policy ACCEPT) target prot opt source destination Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination

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• Easily manage vsftpd virtual users?

  - by Phil

  I have a vsftpd server configured with many virtual users. logins are stored in a Berkeley DB file One configuration file exists for each user to define his permissions (read-only or read-write, home directory, etc.). To do that, I use the user_config_dir parameter (set in vsftpd.conf). I am wondering if it would be possible to manage these virtual users from a simple GUI (such as web interface). I have found some tools but they are limited to generic vsftpd configuration, not virtual users management. Otherwise, PAM-MySQL seems to be a good way to manage users efficiently but only username/password and logs can be stored in database, not permissions. Finally, I've found this thread, but the solution is a bit awkward... Is there any way to easily manage the vsftpd users ?

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• Automating the input of query criteria

  - by Steve Wren

  New user to this site and found an extremely informative answer to a question I had but can't find an answer to this one. Using Access 2010, I have 42 different criteria that I need to run individually using the same query. Rather than have 42 queries, or an input parameter dialogue box where I need to enter the criteria 42 times, can I automate this so that the 42 criteria are sourced sequentially from a different table and input to the query using a macro/ module etc. Unfortunately I have no experience of SQL/VBA so am struggling. Any help would be greatly appreciated.

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• Interested in scp recipe for sftp [closed]

  - by GJZ

  You wrote in a reply this Blockquote The problem is that sftp runs as the user's id -- first, the sftp client ssh's into the target host as the given user, then runs sftp-server. Since sftp-server is running as a regular user, it has no way to "give away" a file (change owner of a file). However, if you are able to use scp, and assign a key pair to each user, you can get around this. This involves adding a user's key to root's ~/.ssh/authorized_keys file, with a "command=" parameter to force it to run a script that sanitizes and alters the arguments of the server-side scp program. I've used this technique before to set up an anonymous scp dropbox that allowed anyone to submit a file, and ensure that no one could retrieve submitted files and also prevent overwrites. If you are open to this technique, let me know and I'll update this post with a quick recipe. We are interested in this scp quick recipe for our community services file sharing. Best Regards, Gert Jan Zeilstra

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