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  • Parallel File Copy

    - by Jon
    I have a list of files I need to copy on a Linux system - each file ranges from 10 to 100GB in size. I only want to copy to the local filesystem. Is there a way to do this in parallel - with multiple processes each responsible for copying a file - in a simple manner? I can easily write a multithreaded program to do this, but I'm interested in finding out if there's a low level Linux method for doing this.

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  • HP Colour LaserJet Printer Hard Drive

    - by Jon Rhoades
    We are struggling to print Student's Theses on our HP CLJ CP4025 Printers (It will only let us print 1 at a time & typically they need multiple copies). Supposedly the solution is to install the optional Hard Drive. My question is: a) Does a hard drive on the printer make a significant difference? b) Can we use any old hard drive or do we have to use the rather pricey HP High performance EIO units?

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  • Problems starting MySQL on Mac OS X

    - by Jon
    I am not able to start MySQL server on Mac OS X 10.4.11. MySQL was installed using Macports. MySQL was running fine until it suddenly died without any obvious reason. When running "mysql", I get the error message: ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/opt/local/var/run/mysql5/mysqld.sock' (2) If I try to start MySQL manually, I get the following error message: sudo /opt/local/share/mysql5/mysql/mysql.server start Starting MySQL/opt/local/share/mysql5/mysql/mysql.server: line 159: kill: (636) - No such process ERROR! In /etc/mysql/my.cnf I have: socket = __PREFIX/var/run/mysqld/mysqld.sock But the path "opt/local/var/run/mysqld/" does not exist on my system. I tried to change the socket path to "__PREFIX/var/run/mysql5/ mysqld.sock" (which is where the socket is located). Unfortunately, this did not help either. Owner and Permissions for /opt/local/var/run/mysql5/ are correctly set. Any suggestions on how to start MySQL again? Thanks for your advice.

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  • How do I diagnose a bottleneck in an Intel Atom based Ubuntu server?

    - by Jon Cage
    I have a small media server at home which has software raid and a gigabit link to the rest of my network. For some reason though, I only get ~10MB/s transfers when copying to/from the server. I use software RAID5 (mdadm) over 4 1TB disks. On top of that I then use LVM to give me a huge pool of disk space which is then split up into multiple partitions which can be resized as and when they need it. I'm guessing this it most likely the cause, but I'd like to know for sure where the root cause is. So, how can I benchmark network throughput (Windows 7 desktop <- Ubuntu server) and hard disk performance to try and identify where my bottleneck might be? [Edit] If anyone's interested, the motherboard is an Intel Desktop Board D945GCLF2. So that's a 300 series Atom processor with the Intel® 945GC Express Chipset [Edit2] I feel like such a fool! I just checked my desktop and I had the slower of the two onboard NICs plugged in so the server is probably not at fault here. Transferring a copy of ubuntu off the server I get ~35-40MB/s according to Windows 7. I'll do those HD tests when I get a chance though (just for completeness).

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  • I have too many DNS servers configured

    - by Jon Will
    I have my laptop connecting to my wireless router, and I have told the router to issue out DNS via the DHCP lease. The laptop is configured to use the information. The router is configured to only issue two DNS server addresses from open dns, but the laptop reports Networking Dns Servers: 10.197.100.1 10.197.100.2 10.197.100.3 8.8.8.8 8.8.4.4 208.67.222.222 208.67.220.220 I have no idea where the laptop is getting these additional IPs as DNS. Please advise.

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  • Webserver: chrooted PHP gives mysql.sock error when attempting to reach mysql

    - by Jon L.
    Hey guys, I've configured an Ubuntu webserver with Nginx + PHP5-FPM. I've created a chrooted environment (using jailkit) that I'm tossing my developers into, from where they can develop their test applications. Chroot jail: /home/jail Nginx and PHP5-FPM run outside the chroot, but are configured to function with websites within the chrooted environment. So far, Nginx and PHP5-FPM are serving up files without issue, except for the following: When attempting to connect to MySQL, we receive this error: SQLSTATE[HY000] [2002] Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' Now, I believe the issue is due to the non-chrooted php.ini referencing mysqld.sock outside of the chroot environment (it's actually using the MySQL default setting currently). My question is, how can I configure PHP to access MySQL via loopback or similar? (Found that as a suggestion in a google result, but without any instructions) Or if I'm missing some other obvious setting, let me know. If there's an option of creating a hardlink (that would remain available even if mysql is restarted), that would be handy as well.

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  • Virtual Server 2005 VSS writer missing

    - by Jon S.
    I have two servers running Virtual server 2005 R2 SP1. I'm using Symantec Backup Exec 10d for backups. One server runs the backups fine but the other will cause the vm's to crash when it tries to backup. I think the problem is because the "Microsoft Vitual Server 2005 Writer" is not showing up when I run "vssadmin list writers". Can I install the writer without reinstalling VS 2005?

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  • Why is Apple System Image Utility so slow?

    - by Jon Rhoades
    I'm using Apple System Image Utility (SIU) on Snow Leopard 10.6.2 and I am rather disturbed it takes over Three hours to make a Netrestore or Netboot image. I'm using as the donor machine a brand new iMac and as the imaging machine a brand new iMac connected using target disk mode & Firewire 800. The hard drive size and subsequent image is about 8GB. To restore the image over the network takes about 4 minutes. Given that Norton Ghost will take an image in about 5 minutes (or less on newer machines) over USB2, why is the Mac over an order of magnitude slower?

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  • Deleted the .AppleDouble files inside my Time Machine backups - are they still OK?

    - by Jon M
    My Ubuntu server is set up to emulate a TimeCapsule (after a very long weekend following the instructions here, here and here). My macbook pro has been backing up happily to it for a month or so now, and all seems well. The other day I was tidying up the extraneous files from my music collection on the server, got a bit loose with the find command... and ended up deleting all the .AppleDouble files underneath '/', which included the Time Machine folder. Now, Time Machine still appears to work fine, it backs up regularly, I can look through all the previous versions of my files, and they seem to restore without trouble. My question is: by deleting the .AppleDouble files, have I actually broken anything? Is the TM data still good, or should I trash it and start fresh (i.e. with a new 'day 0' full backup)?

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  • Line-length-tolerant XML diff

    - by Jon Skeet
    I've looked at the answers to this question, and unfortunately none of them has helped me so far. Not to beat about the bush, the second edition of C# in Depth is now in copy edit. I want to be able to see what the copy editor's done really easily, so I can reject or accept his changes. We're using a modified form of docbook, but I'm happy enough looking at the raw XML source. All fine so far - except that when the copy editor makes a change, that can change the line wrapping. So something that used to read: <para>Foo bar baz second line</para> now reads <para>Foo bar grontle baz second line</para> Now the real change here is the insertion of "grontle". I don't care that "baz" has moved from the first line to the second line... but all the diff tools I've seen do. I realise that one option would be to reformat the whole document (or possibly just whole paragraphs) into single lines... but that's then really hard to read, because diff tools don't wrap when they're displaying. I'm sure I can manage with the tools I've got, but if anyone knows of anything better, I'd be really glad to hear about it. I suspect my publishers would too :) (I've included the Windows tag here because I'd really need it to be available on Windows. I'd like to hear about any non-Windows software too, but only in case I could help to build it on Windows :)

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  • LVS TCP connection timeouts - lingering connections

    - by Jon Topper
    I'm using keepalived to load-balance connections between a number of TCP servers. I don't expect it matters, but the service in this case is rabbitmq. I'm using NAT type balancing with weighted round-robin. A client connects to the server thus: [client]-----------[lvs]------------[real server] a b If a client connects to the LVS and remains idle, sending nothing on the socket, this eventually times out, according to timeouts set using ipvsadm --set. At this point, the connection marked 'a' above correctly disappears from the output of netstat -anp on the client, and from the output of ipvsadm -L -n -c on the lvs box. Connection 'b', however, remains ESTABLISHED according to netstat -anp on the real server box. Why is this? Can I force lvs to properly reset the connection to the real server?

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  • Web Host Recommendations

    - by Jon B
    I'm presently using web.com for website hosting. I've had some so-so experiences, and think they are a little overpriced. We have a fairly simple website - no e-commerce. We do need plenty of storage space, though. What web hosts are people happy with?

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  • Windows 2008R2 blocks outbound LDAP for non-admins?

    - by Jon Bailey
    I've got a Windows 2008R2 terminal server with ~30 users on it. It's joined to a Samba-based domain. During the login script, we connect directly to the LDAP server to pull out certain profile information. This used to work just fine. Now, it doesn't, but only for non-local-admin accounts. Local admins work fine. As a non-local-admin: Connection to ports 389 or 636 just terminate (wireshark on the LDAP server reveals no connection attempt) Connection to other ports on the same server work fine Same thing on multiple LDAP servers Windows firewall is disabled Can't find any other rules/policies that may block this I suspect since this used to work, it came down during an update, but for the life of me, I can't find what. EDIT: I just ran Wireshark on the machine and didn't see anything when connecting to the LDAP server in question (or any LDAP server for that matter). I can, however, see traffic when I connect to that server on another port.

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  • Why would the IIS UrlRewrite module continue redirecting requests after the rule is removed?

    - by Jon Norton
    Our application uses the IIS UrlRewrite module to temporarily redirect requests during upgrades to a maintenance site. We have seen a few instances where even though the redirect rule has been removed, the server continues to redirect all requests according to the removed rule. There does not seem to be any pattern with this, and has only occurred once or twice. We have taken the following steps to try and determine the cause of this behavior. Verified that the original rule was a 307 temporary redirect Requested the application from machines that had never requested it before Used a different browser Added and removed a dummy rule from the IIS management console Checked the http kernel cache using netsh http show cachestate Modified the applicationHost.config file by hand (the rule was not still in the file, we just added a superfluous space) In the past when this has happened, we have been able to restart IIS and it solves the problem but that is not always an option and we really want to figure out what the root cause is. How or why would UrlRewrite be caching the response and not responding to configuration changes?

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  • Web filtering (Proxy or DNS) with option for users to ignore the block

    - by Jon Rhoades
    We are struggling with our users visiting infected or "attack" sites and Phising in general. Most of our machines are protected by an Enterprise anti virus and monitoring solution (McAffe ePO) and we try to get people to use Firefox... But no AV is perfect and we have to endure personal machines as well (albeit on their own 'Plague' VLANs) and would like to do something about Phishing as our users seem intent on disclosing their passwords to the world... To complicate matters we don't want to implement a block for many many reasons instead we would like to implement something akin to Firefox's "Reported Scam/Phish/Attack Site" - "Get me out of here" or crucially "Let me in anyway", giving the user a choice to still infect themselves if they feel like it (or look at a site incorrectly blacklisted). The reason we can't just use Firefox is we have a core enterprise App only certified on IE6&7 - thank you Oracle. Is it possible to implement this type of advisory filtering either using a proxy (in our case Squid) or DNS? http://serverfault.com/questions/15801/what-free-options-are-available-for-web-content-filtering http://serverfault.com/questions/47520/open-source-filtering-of-https-traffic Were a good start, but they don't address the advisory aspect of the filtering.

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  • DBRD dual primary Heartbeat resource management

    - by Jon Skarpeteig
    I have the following setup: Two servers with DRBD running dual primary with OCFS2 Heartbeat with two virtual ips, one for each server Round robin DNS to load balance NFS across the two vIPs Shutting down Server1 for a period of time, cause Server2 to take over the vIP for failover. However, when Server1 returns - it takes over the designated vIP as soon as heartbeat gets connection again - even though the DRBD is running sync (and thus not up to date) How can I configure heartbeat to perform failback as soon as Server1 again is in sync with Server2 ? (And not before)

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  • Running a 2048 x 1152 monitor on a Dell Vostro 220s with HD3450 video card

    - by Jon
    I recently bought a new monitor which has a resolution of 2048 x 1152. However, this resolution is not on in the options list. I have tried installing ATI Catalyst but to no avail. I am running the monitor on the VGA cable. How can I add the resolution to the settings drop down? Additional info: VGA is through a splitter cable from DVI The outputs on my grahics card are DVI and VGA Monitor only has VGA input

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  • GoDaddy SSL on Shared Hosting

    - by Jon
    So I'm very new to using SSL certificates and I have been trying to install one on a site for a client. He is using shared hosting for multiple domains through GoDaddy, and the site we're working on is not the primary domain. He purchased a UCC certificate for multiple domains and I installed it on the shared hosting account. My thought was that since the domains were under the same hosting account, then they would each be protected under the certificate. This was not the case...apparently. I checked both domains with an SSL checker and the primary domain checked out. The domain that we wanted the SSL on showed the following errors: None of the common names in the certificate match the name that was entered (www.CLIENTDOMAIN.com). You may receive an error when accessing this site in a web browser. I'm not sure how to fix this. It was just purchased yesterday, so if necessary, I guess I could un-install it or re-key it (???). Is there a way to just change the common name to www.CLIENTDOMAIN.com (the correct domain)?

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