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• Suspected network performance issue on VirtualBox Ubuntu guest on Win7 host

  - by Adam

  I set up Ubuntu 12.04 in VirtualBox on the Win7 machine I was allocated on my new project. I am running Java, Eclipse, Tomcat to develop a large data-intensive application and I noticed that this application runs at half the speed of my colleague's identical machine, where he runs it all under Windows. I think I have narrowed down the performance issue to the network, after comparing and equalising all the Java VM settings with my colleague. Is there a ping test I can do or some other network diagnostic test to flag up any problems? To give some background, the network performance is confusing. Running a network speed test to my colleague's machine with iperf shows speeds of 6 Mb/s from my Ubuntu guest, and 90 Mb/s from the win7 host. Large downloads, e.g. the Java SDK, come down at about 1.2 MB/s on both the guest and the host. Pings are sub-1ms on the host, but 1.5ms on the guest. I also did a broadband speed test, and got 10Mb/s download speed on both, but the host has an upload speed of 10Mb/s but the guest only uploads at 3Mb/s. I've been trying to diagnose any MTU problems with ping -M do to identify any kind of packet fragmentation problem but it's progressing very slow because I don't have much experience in this area. From what I read on other people's networking issues with VB and Linux guests on Win7 hosts, I should be able to get the speed on the guest up to the same level as the host. I installed a fresh VM with Ubuntu again to see if I'd foobar'd it somehow, but I'm getting the same readings with iperf on the virgin installation. My setup is: Adapter 1: Intel PRO/1000 MT Desktop (NAT) Adapter 2: ditto (host-only adapter) eth0 Link encap:Ethernet HWaddr 08:00:27:0b:76:bf inet addr:10.0.2.15 Bcast:10.0.2.255 Mask:255.255.255.0 inet6 addr: fe80::a00:27ff:fe0b:76bf/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:86236 errors:0 dropped:0 overruns:0 frame:0 TX packets:49369 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:69163946 (69.1 MB) TX bytes:3530535 (3.5 MB) eth2 Link encap:Ethernet HWaddr 08:00:27:a3:26:b8 inet addr:192.168.56.101 Bcast:192.168.56.255 Mask:255.255.255.0 inet6 addr: fe80::a00:27ff:fea3:26b8/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:59 errors:0 dropped:0 overruns:0 frame:0 TX packets:57 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:9148 (9.1 KB) TX bytes:7648 (7.6 KB) lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:701 errors:0 dropped:0 overruns:0 frame:0 TX packets:701 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:66321 (66.3 KB) TX bytes:66321 (66.3 KB)

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• Rack Mounting a Server with hot air vents on the top?

  - by Adam

  We just got a couple of HP DL360 G7's, and I notice it has vents on the top. More hot air seems to exit through these vents than it does anywhere on the back. All our servers in the past have always vented all the hot air through the back. How are these servers with top vents supposed to be mounted? Everyone always says airflow is best by not leaving gaps on the rack, but it seems like a server right on top of it would receive a lot of heat.

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• Backing up files on ubuntu for reinstall. Will there be problems with permissions?

  - by adam

  I have some very important files I want to backup before I reinstall my Ubuntu back to 9.04 from the 9.10 (its causing me all sorts of problems). The files total size is small so im just going to copy them over to Dropbox. Im wondering, when i reinstall Ubuntu and copy them back will there be any issues re the permissions of those files because my old user account which created them and the new user Ill setup on the new install will be different?

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• Why does my company's software download get blocked by anti-virus programs when downloading from the company website but not other websites?

  - by Adam Burgess

  My company distributes software via website download off of a URL that is on our company's website. The download is an .EXE. We are getting calls from multiple customers saying the download is being blocked. We can help them download by turning off the virus-scan software, but wondering what is causing the block. Here are the details: We have other downloadable .EXEs that download fine without being blocked from the same company website. Our problem download file downloads fine from other websites (i.e., Dropbox) without being blocked. In summary, this one particular download from our company website is being blocked by various anti-virus programs a high percentage of the time. Any suggestions?

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• Adding a file path into a formula that is typed into a another cell

  - by Adam Graham

  I have 'C:\Users\Documents...etc.......[file name.xlsx]Work Sheet'!$B:$F in cell B1 i then want to run a vlookup formula to the above file but instead of vlookup(A1,'C:\Users\Documents...etc.......[file name.xlsx]Work Sheet'!$B:$F,2,false) I want to use the cell B1 for the path. Reason is i want the master to look at multiple workbooks and i don't have time to sit and retype. Please help

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• Windows 7 Long Delay on Login or Unlock

  - by Adam Driscoll

  I have a clean install of Windows 7 x32 running on my HP DV6449us and am experiencing a really long delay (10+ seconds) when unlocking or logging into my computer. The same issue was happening with UAC but I was able to turn that off. I realize this is a security risk but couldn't take it any more. I've read about this being video driver related but have updated the drivers to the newest I could find for the GeForce Go 6150. Anyone else experiencing this? My desktop is very happy but he's sporting a Nvidia 260 GT. Is it just the lack of firepower?

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• Using Active Directory through a Firewall

  - by Adam Brand

  I had kind of a weird setup today where I wanted to enable Windows Firewall on a Windows 2003 R2 SP2 computer that would act as an Active Directory Domain Controller. I didn't see one resource on the Internet that listed what would be required to do this, so I thought I'd list them here and see if anyone has anything to add/sees something that isn't necessary. Ports to Open with "subnet" scope: 42 | TCP | WINS (if you use it) 53 | TCP | DNS 53 | UDP | DNS 88 | TCP | Kerberos 88 | UDP | Kerberos 123 | UDP | NTP 135 | TCP | RPC 135 | UDP | RPC 137 | UDP | NetBIOS 138 | UDP | NetBIOS 139 | TCP | NetBIOS 389 | TCP | LDAP 389 | UDP | LDAP 445 | TCP | SMB 445 | UDP | SMB 636 | TCP | LDAPS 3268 | TCP | GC LDAP 3269 | TCP | GC LDAP Ports to Open with "Any" Scope (for DHCP) 67 | UDP | DHCP 2535 | UDP | DHCP ALSO You need to restrict RPC to use fixed ports instead of everything 1024. For that, you need to add two registry keys: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\NTDS\Parameters Registry value: TCP/IP Port Value type: REG_DWORD Value data: <-- pick a port like 1600 and put it here HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Netlogon\Parameters Registry value: DCTcpipPort Value type: REG_DWORD Value data: <-- pick another port like 1650 and put it here ...don't forget to add entries in the firewall to allow those in (TCP, Subnet scope). After doing all that, I was able to add a client computer to the AD domain (behind Windows Firewall) and log in successfully.

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• Resolving host names to their domain name in an internal BIND domain

  - by Adam Plumb

  I'm setting up a domain on my home network for learning purposes, using BIND on CentOS to act as the name server. I've got the name server up and running as type master for my internal domain (plumbnicoll.family), and can do forward and reverse lookups from other computers in my LAN. For example, host office2.plumbnicoll.family correctly returns office2.plumbnicoll.family has address 192.168.1.3. What I'd like is to be able to resolve just office2 to its address, without needing to put .plumbnicoll.family at the end. Is this possible, or even desirable to do? I'm running a mixed environment at home with both Linux and Windows computers.

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• Preventing SSH RSA host key warnings for change of key vs IP address

  - by Adam M-W

  I have a network with DHCP enabled, and also a computer that dual boots operating systems and has different SSH keys on each (and yes, I would like to keep different keys on each rather than copying the same identity/private key to each). Because the IP address does not change between operating systems because the MAC address is the same, when connecting to ssh, even when not using the IP address but the hostname via DNS/mDNS, I get the warning: Warning: the RSA host key for 'hostname' differs from the key for the IP address '192.168.1.172' Offending key for IP in /Users/user/.ssh/known_hosts:37 Matching host key in /Users/user/.ssh/known_hosts:38 Are you sure you want to continue connecting (yes/no)? How can I surpress the warning when the hostname differs from the IP address for that hostname, but retain the ability to check host keys are the same for each hostname? (each OS has a unique hostname)

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• Adobe Photoshop CS5 mac - drag and drop to open

  - by Adam Kiss

  Adobe Photoshop CS5 has new feature - when file is dropped from finder onto document, it creates new smart layer with contents. What do I have to do to open the file instead creating new layer? Thank you.

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• How to install couchdb on mac osx 10.6

  - by Adam

  I'm trying to install CouchDB on my mac, running snow leopard 10.6. I installed Xcode, MacPorts, and then followed the instructions here: http://wiki.apache.org/couchdb/Installing_on_OSX It all worked fine until I tried to visit the web interface: http://127.0.0.1:5984/_utils/index.html Google chrome said "Oops! Google Chrome could not connect to 127.0.0.1:5984" I tried connecting using telnet in bash and it said connection refused. Can somebody shed some light with some suggestions or perhaps and idiot-proof walkthrough?

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• vmware workstation - virtual network adapters missing from ipconfig, still show in networking (XP host)

  - by Adam

  Hi Folks - here's a new one for me, and my first time posting here: I installed VMWare workstation 7.1 on a new PC. VMWare properly installs the virtual network adapters under the Network Connections control panel, however for some reason they do not show up under ipconfig, which is very weird. They also don't appear anywhere in "route print". I don't have network connectivity to the VM. My guesses are perhaps some conflict with Symantec AntiVirus or Symantec Client Firewall. Tried the following things: enabling TCP/IP in the virtual network adapters (they often get installed with it disabled for some reason) Restoring defualts in the VMnetcfg gui tool (this causes an uninstall and reinstall of the virtual network adapters on the host) Re-installing vmware workstation Uninstalling checkpoint secureremote and then reinstalling vmware Just to be clear, this problem is totally on the host. In my searching for stuff about (non-vmware) adapters missing from ipconfig, I see some posts about resetting the TCP/IP stack using netsh. Looking into that next... Thanks!

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• Best open source server notification software

  - by Adam Evers

  I am looking for an open source notification/monitoring software which will work much like growl does with a mac. It would be awesome if I could receive certain messages to my mac computer from my server when lets say it restarts or some predefined error happens etc. Anyone know of anything like that? I know of Nagios but I am thinking not as complex.

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• Email is not sending when the script is running by CRON

  - by Adam Blok

  I wrote the simple backup bash script and at the end of it, it's sending an email to me that backup is ready. Everything works perfect when I run this script from terminal (root), but when the script is running by CRON, email is not sending :-/. #!/bin/sh filename=$(date +%d-%m-%Y) backup_dir="/mnt/backup/" email_from_name="BACKUP" email_to="my@email" email_subject="Backup is ready" email_body_file="/tmp/backup-email-body.txt" tar czf "$backup_dir$filename.tgz" "/home/www" echo "Subject: $email_subject" > $email_body_file ls $backup_dir -sh >> $email_body_file sendmail -F $email_from_name -t $email_to < $email_body_file

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• No Other User In Task Manager Users Tab Windows 7

  - by Samuel Adam

  I want to ask why there is only me on Task Manager's Users tab. Originally I wanted to be able to chat with other clients on my local network using msg command, but I can't found any other user. How to see other users on the same network? I use Work Network, and all of the users is using wifi to connect. I googled about it, but no information is close enough. As much as a newbie question it sounded, I really appreciate any help. Thank you ! :)

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• Alternative to Microsoft Remote Desktop Connection for Mac?

  - by Adam Tuttle

  When working from Windows, I prefer to use RoyalTS instead of the default Microsoft RDP client, because it allows me to save multiple connections, the credentials of the connection, etc; as well has having more than 1 connection open at a time. Is there a similar (or any) alternative to the Microsoft RDP client for connecting from OSX to Windows? Aside from VNC, that is; at this point I'm hoping to continue using the RDP protocol.

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• Accessing localhost on IIS7 from another computer on the network

  - by Adam

  I recently upgraded computers to Windows 7 Professional and am running IIS7. When I'm on my computer I can easily access localhost through my web browser but when I try from another computer on my network (replacing localhost with my computer name) it doesn't work. I also tried using "computername.domain.com" and still no luck. I can access other computers running Windows XP and IIS 5 but I'm having no luck accessing my own from another computer. I checked and my IIS7 has anonymous users enabled. Am I missing any other setting? Is this an IIS7 thing or am I missing a setting? Thanks in advance!

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• How do I get the machine name from an IP via Multicast DNS?

  - by Adam

  I have a list of IP addresses on a network, and most of them support multicast DNS. I'd like to be able to resolve the server name instead of just having the IP address. ping computer.local 64 bytes from 192.168.0.52: icmp_seq=1 ttl=64 time=5.510 ms 64 bytes from 192.168.0.52: icmp_seq=2 ttl=64 time=5.396 ms 64 bytes from 192.168.0.52: icmp_seq=3 ttl=64 time=5.273 ms Works, but I'd like to be able to determine that name from the IP. Also the devices don't necessarily broadcast any services, but definitely do support mDNS broadcast. So looking through services won't work.

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• NAS backup - multiple machines

  - by Adam

  HI We are looking to backup between 50-100 servers to a NAS box each night (Contains of each server ie files and folders). We need the backup application to backup to a NAS and perform incremental backups following the full backup. We also need to be able to store versions of each file. The full backup will probably be about 5TB. Does anyone know a a cheap or free application which will do this? Thanks

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• Outlook 2007 Autodiscover Out Of Office Assistant

  - by Adam

  Hi We are having an issue trying to set the Out Of Office Assistant through Outlook 2007. It works fine through OWA but all of the users cannot set it through Outlook. They get: your out of office settings cannot be displayed because the server is unavailable We have run through: https://www.testexchangeconnectivity.com/ and we get this error: Certificate name validation error More info: Host name xxxxxxxxxxxx.com does not match any name found on the server certificate CN=*.securedwebspace.com, OU=Domain Control Validated - RapidSSL(R), OU=See www.rapidssl.com/resources/cps (c)09, OU=GT93715821, O=*.securedwebspace.com, C=GB Any ideas on how we can fix this? (Everything else seems to work fine - Its just the Out of Office through Outlook) Server is SBS 2008 with Exchange 2007 installed. Thanks

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• building a new pc - no display, no beeps

  - by Adam

  Hi Building a new pc using this motherboard: GA-MA785GMT-UD2H and a 500W power supply (1 x 20 pin & 1 x 4 pin connectors). The CPU fan, hard drive and power supply all spin up but no display on the monitor and no beeps. Have tried: taking out all of the memory and still no beeps used a different power supply and still no display I only have the Motherboard, memory, CPU, heat sink & fan & power supply connected. Any ideas? Do I have a faulty motherboard?

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• Web/Email Hosting [closed]

  - by Adam

  Hey I use Rackspace for website and email hosting but I have lots of disk space and bandwidth I don't use. Does anyone need good reliable hosting for a small fee?

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• how install minimum domain email piping to script in centos?

  - by Adam Ramadhan

  hello i have search google on a simple tutorial on how to make a piping email. first how does really email technically work? "stmp is a process that binds to 25, waiting for email request that goes in from another stmp process(in another server) determined by the domain MX route that will send the message to port 25 if any email goes though the MX.domain.tld" that is in a nutshell how emailing work, am i right? or there is something wrong here? second, so if im right, we need to set a SMTP server so we can receive incoming emails from MX SMTP route right? ive googled though google and found two best STMP servers from my opinion, they are EXIM and POSTFIX, can anybody give us a simple tutorial installing and setting up an email piping for a fresh installed linux/centos? example *.domain.tld -> allinonepipe.php thanks.

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• Word 2007 "Out of Memory or Disk Space" Error on launch

  - by Adam

  Word 2007 is installed on a Vista Home Premium machine and whenever it starts up it opens what appears to be a dynamic installer to do something and then throws up the "Out of Memory or Disk Space" error. Word 2007 never completes starting up. Reinstalling Word hasn't helped and if I can avoid reinstalling Windows until Windows 7 is released and get Word working in the mean time, that would be ideal. I've been looking around for a solution, once of which seemed to point to a problem with the user account. I created a second user on the machine and Word still had the same problem. The other solution that seems possible is a corrupted normal.dot/normal.dotm file. However, even in the location it should be, I can't seem to find it. Am I going in the right direction with this? Is there another solution I haven't come across that will fix this? If it is possible that renaming normal.dot/normal.dotm how can I find it?

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• file system that allow to specify different RAID level per directory and change it afterward

  - by Adam Ryczkowski

  I have 5 hard drives, where I want to keep my data. Some of my files are more important, and some of them are less. So some of them I wish to put on RAID-6, and for some it RAID-5 is sufficient. It is difficult to predict at the moment of creation of the arrays how much space of each type to declare. What I would do if I didn't hear about zfs, is partition the hard drives into identical 100GB partitions, and as my needs grow, assemble those partitions into md devices using linux-raid. Then, I'd combine those devices using lvm into logical volumes where I'd put my data. So when I'd need more space of e.g. RAID-6, I'd take 100GB partition from each hard drive and assemble them into another RAID-6 md device and would use it as physical storage for the logical volume group dedicated for RAID-6 data. Then I could grow the file system on this logical volume. On top of RAID-6 and RAID-5 Volume Groups (managed by lvm) would reside completely independent file systems, which I'd later merge with multiple mount --bind into a single directory structure that would reflect the logical structure of data rather that of the storage. But now, when I heard about the ZFS with all the performance, data-healing and compression capabilities I cannot stop thinking if it can help me. If so, what do you think would be the best setup?

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