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• GRUB error: unknown filesystem

  - by Ali

  I replaced my old laptop drive which was win7 and ubuntu dual boot with an SSD. Now I connected the old drive through a USB adapter and I want to boot from it. But this comes up: unknown filesystem grub rescue> As i need the programs from old drive I have to boot from it time to time and I don't want to install those software on the new drive. It takes so time to exchange the drives so I want to boot from USB. how can I fix this?

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• Accessing through VPN, which internet connection would be used

  - by Sriram

  I've a data card which has a limit of 2 GB up/download traffic per month. I've an office internet line which has an unlimited up/download. I've successfully connected to VPN using my data card and by changing certain configurations like DNS etc., have also been able to use my office line for internet (verified by doing a IP check - returns the static IP of our office). Now to my question - is it just a NAT which is happening or am I actually using my office line for all communication. Which one would reflect the usage/trace. The data card usage log at this moment does not reflect any usage (which is confusing since the VPN is over the data card connection). Further more (theoretically), would the net be any faster if my office line is let us say 8Mbps and the data card is 512kbps by doing this as against directly connecting the internet using the data card.

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• Connect laptop to mobile wifi

  - by Arnab Sen Gupta

  I have a nokia N97. In my apartment there's a wifi network that we all use to connect to the internet. But for the past few days my laptop is not able to find the network..Initially I thought it was a problem of the network,but hen I found out that others were able to use it..My vista os laptop is able to detect other available networks but not the required one..Then i tried to connect my cell phone to the network and it did easily!! I tried restoring the network settings to default but it showed the network for just 2 mins and it ws back to square one.. I wanted to know can I connect my laptop to the cell using USB and browse internet through that?? I have done it when I used GPRS but am not sure if it cn be done in this situation when the cell is connected toa wifi network..plz help..

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• Hot video card in server

  - by DougN

  Not sure if this belongs here or Superuser (I looked at Superuser -- suspect there are more hardware gurus here). I have a server that sits in a cabinet. It's connected to a small screen that is normally off. However, the video card is running at about 210 F all the time. The rest of the PC is pretty cool (getting temps from SpeedFan). Any thoughts on a way to quiet/calm/cool the video card since it's never really doing anything anyway? I'm usually logged out on the server, and no screen saver defined. Windows is already set to turn off the screen for power saving at 5 minutes.

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• FreeBSD: Samba performance over GBit-Ethernet

  - by Axel Gneiting

  I'm using a FreeBSD NAS with RAID-Z. I can read ~300MB/s from the ZFS disks to /dev/null on the box, but only get about 50MB/s over GBit-Ethernet with SMB to Windows 7 (Samba 3.5.6). Both systems have Intel-PCIe-NICs and are connected directly. Samba is configured to use AIO and I already tried to tune TCP/IP: kern.ipc.maxsockbuf=16777216 net.inet.tcp.sendspace=1048576 net.inet.tcp.recvspace=1048576 net.inet.tcp.sendbuf_max=8388608 net.inet.tcp.recvbuf_max=8388608 net.inet.tcp.delayed_ack=0 Any ideas what's causing the bottleneck? I think the link should handle 100 MB/s easily.

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• Can I set up a COM Port that Connects via TCP/IP?

  - by Kristopher Johnson

  I have an RS232 device connected to a Digi PortServer on my network. I can telnet to the Digi's IP and port number to communicate with that RS232 device. I have a Windows application that knows how to talk to the device, but it wants to connect directly to an RS232 port. So, my question: Is there some way to set up a COM port so that when this application connects to it, it goes through the network to the Digi to communicate with the device? I have run across the utility TCP-Com, which seems like it might be a solution. Is this the best option?

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• How to do simple multitasked loop processing over filenames with PowerShell?

  - by Ville Koskinen

  I'm batch transcoding some 50 GB of video files on a USB hard disk which is connected to a wlan router. The drive is mapped as a network drive on my Windows 7 laptop. The speed handicap of the wlan causes some parts of the processing to become unnecessarily slow, so I would like to do the following with PowerShell: List the names of the files on the network drive to be transcoded Copy the first file to a temporary folder on my laptop Simultaneously Transcode the file in the folder Begin copying the next file from the network drive to the temporary folder After transcoding and copy have both ended, Delete the file which has been transcoded from the temporary folder Begin transcoding next file in the temporary folder Loop until all files have been processed How would I be able to do this with PowerShell? The multitasking part is an obstacle for my skill/persistence combination.

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• Limited RGB range due to HDMI cable?

  - by Cedric Reichenbach

  I have a NVidia GeForce GTX 660, connected to a Samsung SyncMaster S24B350 through a HDMI cable. On my computer, I'm running both, Windows 8 and Linux Mint. I think that something might prevent my system from using the whole RGB spectrum, since bright colors seem to vanish into white under standard settings. However, under Linux I could switch to a limited color range mode (16-235) and suddenly, the image looked much better. Is it possible that the HDMI cable limits color range (since it was originally inteded for TVs)? Is there a way of switching to limited color range mode in Windows 8 as well?

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• Does openssl errno 104 mean that SSLv2 is disabled?

  - by David

  I want to check if my server has SSLv2 disabled. I am doing this by attempting to connect remotely with openssl with the following shell command. openssl s_client -connect HOSTNAME:443 -ssl2 Most literature I could find on the Internet says if I see something similar to the following error then SSLv2 is properly disabled. 29638:error:1407F0E5:SSL routines:SSL2_WRITE:ssl handshake failure:s2_pkt.c:428: I do get the above error when connecting to my Ubuntu server with SSLv2 disabled in Apache Apache but when I connect to my Windows Server 2008 R2 server with SSLv2 disabled in the registry I get the following output and error. CONNECTED(00000003) write:errno=104 I can't find any literature explaining this output and error. If anybody could explain to me if and why this output and error means that SSLv2 is properly disabled, I would appreciate it. Thanks!

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• Database/Web Server and SQL Server Setup - Security?

  - by Jess

  This seems really basic, but I couldn't find an answer already ... we are looking to deploy a website to an IIS server, and a database to a separate server. We aren't sure how to best secure this for access by internal users and internet. The IIS Server is not connected to the domain, and neither is the database at the moment. Should it be? Also, if we use SQL Server authentication instead of Windows Authentication, should we just hard-code the user/password into our internal apps?

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• XenServer VM's lose network settings

  - by Ash

  We deploy virtual machines using Citrix XenServer 6.0 for our clients. Two seperate clients experience the same issue: when a Server 2008 virtual machine is restarted, the static IP addresses (network address, subnet, gateway, primary DNS) don't appear to apply correctly as the IP's cannot be pinged, network services cannot be accessed etc. The issue is resolved by manually switching the network adapters to DHCP, then re-setting them to the original static IP's. While not a major issue, it's a pain when restarting servers due to Windows Updates, plus iSCSI drives need to be manually connected to Windows again via iSCSI Initiator. We have tried removed the network adapters from the virtual machine under XenCentre but without luck. Anyone experienced similar issues?

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• CPU I/O communication

  - by b-gen-jack-o-neill

  Hi, I know there is this question already discussed, but I still don´t understand something, so please just help me clarify it. What I understand there is 2 way to do I/O aka communicate from CPU with other HW. One is to use in and out instructions, and second is the memory mapped. But what I don´t actually understand is, is IN and OUT instructions are used, you define source port. But what is this port? I mean, is it different set of pins on CPU or what? And, to what is that port connected? And for the memory mapped, I miss just a tiny detail. Wheather memory mapped I/O must be first set by IN and OUT instructions, or does the device actually somehow itself connects to the RAM and reads it? Thanks.

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• Unable to connect to a remote SQL Server Instance over a VPN

  - by Jack Njiri

  I'm running SQL Server 2005 on two different servers running Win XP. The two servers are in different physical locations and are connected via a dedecated point to point data link in a virtual private network(VPN). Im only able to connect to the remote instance of SQL Server by specifying the IP address on the server name property. If I provide the actual server name say 'ServerA', then I get an error message. Everything works fine except configuring replication at the subscriber level, which requires the actual name of the instance, not an IP address or alias. I have already configured both instances on allow remote connections and im running the SQL Server Browser. How do I connect to the remote instance by providing the instance name? Alternatively how I configure subscription to a remote publisher without supplying the remote instance name?

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• router cannot get ip address

  - by user43208

  Hi guys, I have a linksys router WRT54G2 connected to a cable broadband. Just last week, everything was working perfectly - I would be able to connect my laptop to the internet using WiFi. However, starting last week, I suddenly lost my internet connection. At first I thought something was wrong with my ISP. However, when I tried connecting the cable directly to my laptop, I found out that there was no problem with the internet connection after all. It appears that it is only my router that cannot get IP address. I have already tried cloning my MAC address and reconfiguring my router using the setup CD, but nothing worked. What could be the problem here? Thank you. Regards, Erwin

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• Audigy 2 Coaxial to Coaxial/Optical connection possible?

  - by Chris

  Hello, The original question is deleted, and asked again below with accurate information. Edit: Excuse me for my ignorance, my friend has a Logitech Z-5500 set. I thought after comparing those systems on Google images that he had the Z-680, but he hasn't. This set has a single Digital coaxial for DVD or CD players or PC sound cards (requires coaxial cable, sold separately) cable. This single cable was connected to the orange tulip connector (SPDIF coaxial out) on the backside of his onboard HP Elite m9070, this connector is broken. How can I use the digital out with a single cable coaxial cable on the Audigy2 (see image below) (I have the following converters for my disposal, can I use one of these? 3.5 mm male - coax optical mini optical male - toslink optical female 2 x toslink optical female, toslink coupler, optical audio extension note: Is it possible to connect a toslink cable with an mini optical male - toslink converter on the digital out of the Audigy 2? (see image below)

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• Debian 6 Internet connection sharing aka IP masquerade not working

  - by Rautamiekka

  The problem: the computers [Xbox 360 and a Kubuntu 12.04.1 laptop] can't access Internet through a recently-installed desktopless Debian 6 laptop (which is wirelessly connected to a WLAN station) but addresses are successfully given by dnsmasq. The attempts: 1.1) /etc/dnsmaq.conf conffed according to http://wiki.debian.org/HowTo/dnsmasq: add lines interface=eth0 dhcp-range=192.168.0.50,192.168.0.150,255.255.255.0,12h 1.2) Follow http://www.cyberciti.biz/faq/rhel-fedora-linux-internet-connection-sharing-howto/ and use their script to setup iptables. 2) Follow the Ubuntu Internet Gateway Method (iptables) at https://help.ubuntu.com/community/Internet/ConnectionSharing recommended and which worked at Share internet in Linux. The Debian laptop was rebooted many times and between each attempt, with and without the script auto-executing via /etc/rc.local. While adding the iptables-restore command to that file I disabled the script.

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• HP Photosmart 7450 Prints Noise On Windows 7 Pro 64-bit

  - by David Mackintosh

  I have received a working (in its last location) HP Photosmart 7450 printer. I connected it up to my Windows 7 Pro 64-bit workstation, and the driver was (apparently) installed. The problem is that whenever I try to print from it -- test page, text from notepad, picture, whatever -- it spins through a half dozen sheets of paper, some of which have fractions of text on them, but most of which are either blank or have line noise printed on them. Noise similar to what was printed out on ye olde laserjet printers when the postscript interpreter failed. HP's web site only has a "use the included driver in Windows 7, be happy" instruction. The driver has been removed and added several times. The printer was previously attached to a XP Home computer and worked correctly without incident. Does anyone have any ideas for troubleshooting before I drop this printer in the river?

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• RAID across SAS controller ports

  - by BlueGene

  Hi, I'm managing a HP DL360 G5 machine. It has a SAS controller with two ports. Port 1 is attached to 4 drive bays and Port 2 has 2 bays. The machine currently has 3 drives connected to Port 1 with RAID 5 configuration. I'm trying to max out the bays by adding 1 disk in port 1 and 2 in port 2. Can I group those three disks(1 disk-port, 2 disks-port 2) in a RAID 5 configuration?

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• Can't connect to local SQL Server

  - by D.M.

  I'm banging my head against the wall here and can't get things figured out. Yesterday I uninstalled SQL Server 2008 Express and installed a full copy of SQL Server 2008 R2. Everything installed fine but I can't connect to the database to save my life. There is a similar question here that never got answered and I'm not sure if this may be specific to 2008 R2 and how I may have installed. Under my old configuration (SQL Express) I connected with "DM\SQLEXPRESS" just fine. So far I've tried: DM\MSSQLSERVER - .\MSSQLSERVER - \MSSQLSERVER - MSSQLSERVER - DM\Dave\MSSQLSERVER and I get the "cannot connect to server" error every time. I have the service installed as well as the SQL Server Browser that I have started. If anyone had any suggestions that would be great.

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• How to see who is using my wifi

  - by Bakhtiyor

  Dear all. Such a question. I have WiFi router at home and would like to know if there is any way to know who is connected to my WiFi network and using it. My WiFi network is password protected but still there could be chances that neighbors crack it and could use my WiFi for free. For this reason I would like to know is there is any tool to inspect the log of WiFi router in order to know which computers are connecting to it. Thanks a lot beforehand.

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• apache2 mod_proxy without 301 moved permanently?

  - by Guy Sensei

  Is it possible to not send a 301 moved permanently response to the client when using mod_proxy? I would like the client to deal with the reverse proxy as opaquely as possible. My Virtual Host Settings- relevant snippet ProxyPreserveHost On ProxyPass /GTM http://192.168.1.27/GTM ProxyPassReverse /GTM http://192.168.1.27/GTM wget localhost/GTM --2011-09-27 21:54:22-- localhost/GTM Resolving localhost... ::1, 127.0.0.1 Connecting to localhost|::1|:80... failed: Connection refused. Connecting to localhost|127.0.0.1|:80... connected. HTTP request sent, awaiting response... 301 Moved Permanently Location: localhost/GTM/ [following] --2011-09-27 21:54:22-- localhost/GTM/ Reusing existing connection to localhost:80. HTTP request sent, awaiting response... 200 OK

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• How to selectively route network traffic through VPN on Mac OS X Leopard?

  - by newtonapple

  I don't want to send all my network traffic down to VPN when I'm connected to my company's network (via VPN) from home. For example, when I'm working from home, I would like to be able to backup my all files to the Time Capsule at home and still be able to access the company's internal network. I'm using Leopard's built-in VPN client. I've tried unchecking "Send all traffic over VPN connection." If I do that I will lose access to my company's internal websites be it via curl or the web browser (though internal IPs are still reachable). It'd be ideal if I can selectively choose a set of IPs or domains to be routed through VPN and keep the rest on my own network. Is this achievable with Leopard's built-in VPN client? If you have any software recommendations, I'd like to hear them as well.

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• Why does text look so Horrible in my HD monitor???

  - by Laura

  I just bought a 1080p 22" Samsung HD monitor (connected via HDMI) and the picture and video quality is great but the text quality is absolutely horrible. Even as I type now all the text in this text box as well as in the browser toolbar and start menu, etc looks weird - like it all has a white outline around it that makes it jagged and hard to read. It hurts my eyes just to look at it. I am running my PC in the suggested native resolution of 1920 by 1080, so what's the problem? Is this one of the unavoidable downsides of using a HD monitor? Is there a solution to the problem?

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• Why Matlab in screen in Linux on PuTTY terminates itself after closing PuTTY session?

  - by Karl

  I connected to a linux server with PuTTY and start a screen session, and start matlab with: matlab -nodesktop Then, I run my matlab code as usual. The code will run for hours. So to test whether screen works, I start another PuTTY session and run top. Then, I close PuTTY session with still-running Matlab (top shows Matlab at 100% CPU usage) in screen. To my surprise, my Matlab process vanished after I close the aforementioned session. I've tried this a few times, and it seems the same thing happened. screen -ls shows that my screens are there but detached. top also shows that my matlab is not there. What might be the possible cause of this? Doesn't screen normally should keep on running even I terminate my PuTTY session?

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• Any way to know if two ip address points to the same machine?

  - by Vivek V K

  Is there anyway to find if two different IP address in two different network actually points to the same physical device? I need it in Linux. Edit - I have the same server(a raspberry pi) connected via 2 intranets to my client. I don't know the IP address of the server as it is DHCP. The crude way to do is to reach the raspberry pi from one intranet and check with ifconfig to find the ipadress of the machine in the other Intranet. I want to know if there is any other way I can do it? I know the mac address of the machine.But I don't know how do I find the Ipadress based on the mac address.

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