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• What's the best way of handling permissions for apache2's user www-data in /var/www ?

  - by gyaresu

  Has anyone got a nice solution for handling files in /var/www/ ? We're running Name Based Virtual Hosts and the apache2 user is 'www-data' We've got two regular users & root. So when messing with files in /var/www ,rather than having to... chown -R www-data:www-data ...all the time, what's a good way of handling this? Supplementary question. How hardcore do you then go on permissions? This one has always been a problem in collaborative development environments. Cheers.

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• KVM Slow performance on XP Guest

  - by Gregg Leventhal

  The system is very slow to do anything, even browse a local folder, and CPU sits at 100% frequently. Guest is XP 32 bit. Host is Scientific Linux 6.2, Libvirt 0.10, Guest XP OS shows ACPI Multiprocessor HAL and a virtIO driver for NIC and SCSI. Installed. CPUInfo on host: processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 42 model name : Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz stepping : 7 cpu MHz : 3200.000 cache size : 8192 KB physical id : 0 siblings : 8 core id : 0 cpu cores : 4 apicid : 0 initial apicid : 0 fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx lahf_lm ida arat epb xsaveopt pln pts dts tpr_shadow vnmi flexpriority ept vpid bogomips : 6784.93 clflush size : 64 cache_alignment : 64 address sizes : 36 bits physical, 48 bits virtual power management: <memory unit='KiB'>4194304</memory> <currentMemory unit='KiB'>4194304</currentMemory> <vcpu placement='static' cpuset='0'>1</vcpu> <os> <type arch='x86_64' machine='rhel6.3.0'>hvm</type> <boot dev='hd'/> </os> <features> <acpi/> <apic/> <pae/> </features> <cpu mode='custom' match='exact'> <model fallback='allow'>SandyBridge</model> <vendor>Intel</vendor> <feature policy='require' name='vme'/> <feature policy='require' name='tm2'/> <feature policy='require' name='est'/> <feature policy='require' name='vmx'/> <feature policy='require' name='osxsave'/> <feature policy='require' name='smx'/> <feature policy='require' name='ss'/> <feature policy='require' name='ds'/> <feature policy='require' name='tsc-deadline'/> <feature policy='require' name='dtes64'/> <feature policy='require' name='ht'/> <feature policy='require' name='pbe'/> <feature policy='require' name='tm'/> <feature policy='require' name='pdcm'/> <feature policy='require' name='ds_cpl'/> <feature policy='require' name='xtpr'/> <feature policy='require' name='acpi'/> <feature policy='require' name='monitor'/> <feature policy='force' name='sse'/> <feature policy='force' name='sse2'/> <feature policy='force' name='sse4.1'/> <feature policy='force' name='sse4.2'/> <feature policy='force' name='ssse3'/> <feature policy='force' name='x2apic'/> </cpu> <clock offset='localtime'> <timer name='rtc' tickpolicy='catchup'/> </clock> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>restart</on_crash> <devices> <emulator>/usr/libexec/qemu-kvm</emulator> <disk type='file' device='disk'> <driver name='qemu' type='qcow2' cache='none'/> <source file='/var/lib/libvirt/images/Server-10-9-13.qcow2'/> <target dev='vda' bus='virtio'/> <alias name='virtio-disk0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x0'/> </disk>

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• How to get a good current VMWare browser appliance?

  - by Brooks Moses

  I'd like to have a small VMWare virtual machine that runs a copy of Firefox, with Flash enabled. (Or some equivalently-capable browser.) I tried doing some Google searching with no luck finding good keywords, and tried looking through VMWare's "marketplace" of VMs, but all I found were things from 2006 or so. Is there a reasonably easy way to get a current one? Ideally, I'd like to just download one somewhere, but in the alternative, a quick how-to guide would be useful. I know I could go through the whole process of getting a full-Linux-install VM and setting things up, but that seems like quite a lot of trouble and ends up with a pretty heavyweight solution to the problem, so I'm hoping there's a simpler way.

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• Install both 64-bit and 32-bit JDK on a 64-bit windows?

  - by Toperi

  I need to use a java library that uses native code requiring a 32-bit jvm. I have 64-bit windows with 64-bit eclipse installed with 64-bit JDK7. In order to develop with it, do I need to have 32-bit JDK? Or would the JRE suffice? If it is possible to install both, what is the naming convention you use for the installation directory for the 32-bit jre or jdk? I have heard rumors there is a performance hit on virtual memory if both are installed, is this true?

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• How to unmount a VHD in Windows 7. There is no unmount option.

  - by Triynko

  I mounted a VHD file in Windows 7 using the Disk Manager. Once mounted, there is no option to Unmount it. The only thing close to such an option that I can find is if I click the icon in the taskbar notification area that I use to remove USB devices... there's an option to eject the virtual hard disk. However, when I click that, it says that it's in use and cannot be ejected. Even though... it's not in use, I never even browsed the drive. The disk manager is closed... and the only open files handles to the drive (according to disk performance in task manager) is SYSTEM. Ejecting devices cleanly has been a problem since Windows XP, and it sickens me to see it persist into windows 7.

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• Hyper-V Manager right clicking on remote VM causes MMC error

  - by Greg Bray

  I have a Windows 2008 R2 Enterprise Server with SP1 that I log into and use to manage virtual machines running on multiple HyperV servers on our domain. Sometimes when I right click on a remote VM the HyperV Manager will crash and display the following error message: If I use the Actions menu on the lower right it works just fine, but for some reason right clicking cause MMC to stop working. Is there any way to fix this issue? Here are the full details of the error message. Description: Stopped working Problem signature: Problem Event Name: CLR20r3 Problem Signature 01: mmc.exe Problem Signature 02: 6.1.7600.16385 Problem Signature 03: 4a5bc808 Problem Signature 04: Microsoft.Virtualization.Client Problem Signature 05: 6.1.0.0 Problem Signature 06: 4ce7c9e3 Problem Signature 07: 342 Problem Signature 08: 1f Problem Signature 09: System.OverflowException OS Version: 6.1.7601.2.1.0.274.10 Locale ID: 1033 Read our privacy statement online: http://go.microsoft.com/fwlink/?linkid=104288&clcid=0x0409 If the online privacy statement is not available, please read our privacy statement offline: C:\Windows\system32\en-US\erofflps.txt

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• Internet connection sharing: Ubuntu 9.10 Server on Windows 7 and VMWare

  - by avesse

  I'm trying to get Internet Connection Sharing (ICS) working between my Windows 7 RTM host and a Ubuntu 9.10 Server running on VMWare Workstation 6.5, but I have not been able to get it right. Here's what I have done: Configured VMWare to use Host Only networking (I tried NAT as well). Enabled ICS on my host's network connection, allowing VMnet1. After enabling it, Windows informed me that its VMnet1 IP has changed to 192.168.137.1. So in VMWare's Virtual Network Editor I configured VMnet1: Subnet 192.168.137.0 Mask 255.255.255.0 I did the same for DHCP. For NAT i set 192.168.137.1 as Gateway. I cannot ping any sites or get access through apt-get/aptitude install/update, although domains do get resolved to IPs. I have also tried using a static IP in Ubuntu. I don't know if it makes a difference, but my external IP is locked to my host's MAC address.

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• Database Server Hardware components (order of importance), CPU speed VS CPU cache vs RAM vs DISK

  - by nulltorpedo

  I am new to database world and would like to know what are crucial hardware specs when it comes to database performance. I have searched the internet and found this so far (In order of decreasing importance): 1) Hard Disk: Get an SSD basically (much more IOPS than spinners) 2) Memory: Get as much as you can afford 3) CPU: For the same $ spent, prefer larger cache size over speed. Are these findings sensible? EDIT: I would like to focus on CPU speed VS CPU cache size. EDIT2: The database is used to store some combination of ints and int arrays with few text fields. There are a lot of Select queries looking for existing entries. If entry is not found, then insert it. I would say most of processing would be trying to find a match across a table with 200 columns and 20k rows. The insert statements are very few. EDIT3: Also, we have a lot of views (basically select queries).

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• Type Chinese with French keyboard

  - by SoftTimur

  I use a Mac with French keyboard, and I have installed a Windows 7 as virtual machine. Now I would like to type Chinese in this Windows 7. The normal input method for Chinese within Windows 7 allows me to input Chinese, but does not work perfectly, because it does not recognize I am using a French keyboard - it presumes I am using a English keybord... So for some keys, what I type on the keybord is not what the input method gives on the screen... Could anyone help on this?

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• Apache2 conditional section based on port

  - by Waleed Hamra

  I don't know much about if statements in apache configuration, and I'm wondering if I can have a section of the configuration applied only if the request is received on a certain port. In short, this is about SSL. I have name based virtual hosts, I can make a configuration for port 80, then duplicate it all for port 443, and add the relevant SSL configurations. But this seems redundant. I was wondering if i can have something like: <VirtualHost *:80 *:443> and then I can put: <IfModule mod_ssl.c> SSLEngine on SSLCertificateFile ... SSLCertificateKeyFile ... SSLCACertificateFile ... </IfModule> inside an if statement that checks if connection is on port 443... or is such thing impossible? the server supports SNI, and I don't have any worries from non-SNI compliant browsers.

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• Win7 to Win7 Remote Desktop Not working, Xp to 7 working fine

  - by vlad b.

  Hello, I have a small home network and recently i tried to enable remote desktop for one of the pc's. I have a mix of Windows 7, Windows Vista and Xp runing alongside ubuntu, centos and others (some virtual, some real). I have a few Windows 7 pc`s that can be connected to using remote desktop from inside and outside the network (port redirects on routers, etc, etc) and some Xp ones. The trouble is when i tried to do the same thing to a Win7 laptop i discovered i can't connect to it from another win7 pc inside the home network. To sum it up Working: xp -- win7 not working: win7 -- win7 What i tried - disable and enable remote desktop (my computer - remote settings) - removing and adding users to the remote settings window - adding a new user to the machine, administrator or 'normal' user - checking the firewall settings on the machine and set 'allow' to remote desktop for both 'home/work' and 'public'networks Any tips on what should i do next? It displays ' .. secure connection' and after that the window with 'Your security credentials did not work' and it lets me try again with another user/password..

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• Centos iptables blocks after reboot

  - by bilal

  I have a Centos5 installation with kvm on my server. I am using nat portforwarding to ssh my virtual machines. I have several iptables rules and saved then in /etc/sysconfig/iptables. After reboot, I see all these rules when I type service iptables status but I am getting a connection refused error. After typing service iptables restart everything works. I don't understand, why do I need to restart iptables again? Doesn't it restart on reboot?

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• HP Compaq T20 Thin Clients & Windows Server 2008 R2: RDP Disconnects instantly.

  - by sinni800

  Hello, I have some HP Compaq T20 Thin Clients connecting to a Windows Server 2003. Now I want to upgrade to 2008 R2, so I tested a trial installation with remote desktop in administration mode. So I try to connect my T20 to the server and... It doesn't matter if I turn off encryption or not it disconnects with an generic error instantly. The T20s have Windows CE embedded with RDP 5.2 installed. Out of curiosity I tried Windows Server 2008 (no R2) and it worked! I tried the same with a Windows 7 machine set up with- no work. I can not update the T20s to Windows NT embedded for example because they only have a low amount of flash memory. It seems the "new" version of RDP coming from Windows 7 / Windows Server 2008 R2 is completely incompatible with the older 5.2 version. People are having the same problem here: http://social.technet.microsoft.com/Forums/en-US/winserverTS/thread/700488cd-a872-47e5-85a7-595f050afc10

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• Hosting 2 different SSL domains on the same IP [closed]

  - by Jim

  Possible Duplicate: Multiple SSL domains on the same IP address and same port? I have 2 different domains, domain1.com and domain2.net. Both require SSL certificates. I've got the certificates signed by a CA and now need to set them up on Apache. I've got a single IP address and have found a post here: SSL site not using the correct IP in Apache and Ubuntu that apparently works for ubuntu but I am on CentOS and have not had the same luck trying that configuration. When I try that configuration, Apache dies telling me that the port is already in use: (98)Address already in use: make_sock: could not bind to address 0.0.0.0:443 I had SSL working for a single domain but now that I've added the second, I get a browser warning about the cert not belonging to the domain. How do I get both domains to work using virtual host containers?

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• Windows SBS 2011 DNS Role (service) failing & needing restarting

  - by HaydnWVN

  Have a Windows SBS 2011 with Exchange that is handling all DNS for the network. Since getting a 3rd party (Hardware & Support) to setup a recieving FTP service and restricting Exchanges memory useage for another 3rd party product (Stock software) the local network seems to periodically 'lose the internet connection'. Delving deeper I found that the DNS service is somehow failing/stopping without the actual service on the server reporting such (nothing in event logs). A simple restart of the 'DNS Role' on the server solves the problem. The manager onsite reports that he has to do this most days in the afternoon - yet not at the same time and other days it works fine without a restart being required. I'm unable (lacking sufficient SBS2011 knowledge) to diagnose this further, ideally I would like the DNS Role to report (and log) the failure, then automatically restart itself.

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• does heartbeat v3 support same resource agent types of pacemaker?

  - by Emre He

  As we know, Pacemaker supports three types of Resource Agents, ? LSB Resource Agents, ? OCF Resource Agents, ? legacy Heartbeat Resource Agents http://www.linux-ha.org/wiki/Resource_Agents does heartbeat v3 support above 3 types resource agent? or it only support LSB and legacy heartbeat resource agents? because we have only virtual ip and one service need to switch in ha cluster, so we decide not involve pacemaker, so we come to this question, for example we cannot monitor the application service by heartbeat, heartbeat only can handle to start it on active node. thanks, Emre

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• Securely wiping a file on a tmpfs

  - by Nanzikambe

  I have a script that decrypts some data to a tmpfs, the directory is secure (permissions), the machine's swap is encrypted (random key on boot) and when the script is done it does a 35 pass wipe (Peter Gutmann) of the cleartext on the tmpfs . I do this because I'm aware wiping files on a journaling file system is insecure, data may be recovered. For discussion, here're the relevant bits extracted: # make the tmpfs mkdir /mnt/tmpfs chmod 0700 /mnt/tmpfs mount -t tmpfs -o size=1M tmpfs /mnt/tmpfs cd /mnt/tmpfs # decrypt the data gpg -o - <crypted_input_file> | \ tar -xjpf - # do processing stuff # wipe contents find . -type f -exec bcwipe -I {} ';' # nuke the tmpfs cd .. umount -f /mnt/tmpfs rm -fR /mnt/tmpfs So, my question, assuming for the moment that nobody is able to read the cleartext in the tmpfs while it exists (I use umask to set cleartext to 0600), is there any way any trace of the cleartext could remain either in memory or on disk after the snippet above completes?

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• Problems installing Linux to IDE connected compact flash card

  - by mathematician1975

  I have been trying to install Ubuntu on some hardware (Netcom NC-499 board that contains a Vortex86DX processor). I am trying to install to a compact flash card attached to the board via an IDE adaptor, the aim being that the board will boot up and simply treat the compact flash like a normal hard drive. The processor vendor claims support for Ubuntu 10.04 but I am having problems installing it onto the card. I have been trying using a USB CD-ROM drive and the standard .iso image from the ubuntu site (md5 checksum works out fine so no problem there) but I have had no success at all. I have been able to do this with Ubuntu 8.04 but with no other version (9.04 and 10.04 desktop and alternative discs all fail). My question is what other options are available to me to try and install this? I have googled myself apart trying to find out but other than a few sites describing USB based installs using flash memory sticks for very specific hardware, I have found no useful info at all. Any suggestions will be gratefully received.

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• Windows 7 Natively on Mac OS X Bootcamp, Airport Wifi Unable To Connect....

  - by Goober

  Hello! I am using a brand new MacBook Pro. I am running a copy of Windows 7 natively via bootcamp (No use of Virtual Machine Software at all). However the only way I can get Windows to connect to the internet is via ethernet, as opposed to the Macs Airport card picking up the wireless. It just refuses to connect, and gives me a limited access status. Any ideas!? I've run Windows XP natively via bootcamp and I had a few issues with the network constantly dropping out, however I blamed that on the drivers and the general shiteness of XP.... Help greatly appreciated.

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• How to alter mail-from postfix?

  - by Simon

  Hi all, do anyone know how to alter the mail-from of a postfix mail server? Example, I have a postfix mail server which sends mail for the domain example.org. When a linux user, whose account is user.example.org (mapped in postfix/virtual to [email protected]), try to send an email, its mail from is [email protected]. HELO hostname: server.hostname.org Source IP: one ip here mail-from: [email protected] Problems: user.example.org instead of just user. server.hostname.org instead of just example.org. Desired mail-from: [email protected]. This is causing me problems with SPF records for example (example.org differs from server.hostname.org)... any idea of what can be the problem? Thanks in advance, Simon.

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• Should I install Windows 7 on a 3 years old PC?

  - by Jitendra vyas

  This is my PC configuration, Should I upgrade my Windows XP to Windows 7. Currently I'm using Windows XP SP3 32 bit. Now will I get same performance or better performance or bad performance if I install Windows 7 on this system? Or would sticking with XP be better? Memory (RAM): 1472 MB DDR RAM (not DDR 2) CPU Info: AMD Sempron(tm) Processor 2500+ CPU Speed: 1398.7 MHz Sound card: Vinyl AC'97 Audio (WAVE) Display Adapters: VIA/S3G UniChrome Pro IGP | NetMeeting driver | RDPDD Chained DD Network Adapters: Bluetooth Device (Personal Area Network) | WAN (PPP/SLIP) Interface Hard Disks: 300 GB SATA HDD Manufacturer: Phoenix Technologies, LTD Product Make: MS-7142 AC Power Status: OnLine BIOS Info: AT/AT COMPATIBLE | 01/18/06 | VIAK8M - 42302e31 Motherboard: MICRO-STAR INTERNATIONAL CO., LTD MS-7142 Modem: ZTE USB Modem FFFE CDMA :

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• Why does the CentOS 5.8 install give an error about CD-ROM drive when using HP ILO?

  - by Mike B

  CentOS 5.8 I'm trying to install CentOS 5.8 on a box. I'm connecting the ISO to the server via a virtual disk using HP ILO. It initially seems to boot fine but in the middle of the anaconda text-mode package installation, it gives the following error: CD Not Found CentOS CD was not found in any of your CDROM drives. Please insert the CentOS CD and press OK to retry. If I click OK, it gives me the same error. I don't understand how it could get this far and then complain about the CD-ROM drive. Any thoughts?

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• Detecting Request that uses invalid Encoding using Modsecurity

  - by Ali Ahmad

  I am trying write a virtual patch using modsecurity for my hosted web application using following rule i.e. <Location /index.php> SecDefaultAction phase:2,t:none,log,deny # Validate parameter names SecRule ARGS_NAMES "!^(articleid)$" \ "msg:'Unknown parameter: %{MATCHED_VAR_NAME}'" # Expecting articleid only once SecRule &ARGS:articleid "!@eq 1" \ "msg:'Parameter articleid seen more than once'" # Validate parameter articleid SecRule ARGS:articleid "!^[0-9]{1,10}$" \ "msg:'Invalid parameter articleid'" </Location> The problem is how can i reject requests that use invalid encoding as a global WAF configuration so that this patch cannot be circumvented.

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• MOM 2005 SP1 and MBSA 2.1 : Compatible?

  - by Mitch

  We're currently using MOM 2005 SP1 for our system monitoring duties. It was installed and "configured" by someone who is no longer on our team. In the process of correcting a persistent error in the applications log of all of the monitored servers, "Default Global Virtual Directory Not Configured", I'm seeing the MBSA management pack is for MBSA v1.2. The current version of the MBSA appears to be 2.1. Does anyone have any experience in configuring MOM to use MBSA 2.1? Does MOM get along with MBSA 2.1? Any input would be appreciated. Point me in the direction of more reading if there's something out there I should be referring to. Thanks!

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• How can I selectively increase latency? E.g. throttle games

  - by Arcymag

  Basically, I want networked games to run poorly on a network, but I want everything else to run smoothly. I would also appreciate advice on blocking games in general. As far as I can tell, there's a few ways to completely prevent an internet game from running: Blocking entirely via DNS configuration (e.g. hosts file), or router DNS configuration Blocking entirely via a separate DNS server Blocking the application, by uninstalling or some kind of access control Blocking the application by automatically killing the process every once in a while Blocking the application by corrupting files periodically However, I would like a more subtle way to block a program. Something that either: Increases latency (would this be doable through some kind of QoS like what DD-WRT offers?) Increases latency by using a special routing configuration for specific target IPs Throttle other systems resources, such as memory, IO, or CPU Screw around with keyboard configurations when a game is launched I would like this to work on MacOSX and Windows, but Linux would be great too. FYI I don't have a kid, but I was brainstorming with some friends and parents.

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