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• Use `dd` linux program to save / recover a disk's MBR

  - by Graduate

  I have an Ubuntu OS installed on my laptop. I want to install Windows 7 as well to another disk partition (I will do it by recovering it from a special partition on my laptop). After installing Windows, I want to recover my hard drive MBR to be able to load Ubuntu. I have a plan to use linux dd program: 1) (Before installing, perform this command in Linux) dd if=/dev/sda of=/home/user/mbr_backup bs=512 count=1 2) (after installing, load Ubuntu Live CD and launch this) dd if=/home/user/mbr_backup of=/dev/sda bs=512 count=1 3) Load Ubuntu on PC and re-configure the GRUB2 to be able start Windows I need your advice, I want to be sure I won't damage the disk (it's partition table).

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• Why is the System process listening on Port 443?

  - by Cornelius

  I am having problems starting my apache server, because port 443 is already in use. It turns out, the system process (PID 4) uses the port 443. I don't have IIS installed, the services.msc shows (predicatbly) no Exchange server running, nor WWW-Services, nor IIS. I have no idea how to find out what service uses that port short of just disabling each service one after the other, and I am not even sure that would help. I would be grateful if someone could point me towards how I can get my SSL port back, thank you :) P.S.: Of course "just switch apache to another port for SSL" would solve the problem of not being able to start apache. But I'd still like to know what is so insistent about hogging port 443. :) Edit: I by now took the 'hard route' and disabled services one after the other. It turned out that the "Routing and RAS" service was the culprit. Thank you all for the valuable input and the new tools in the combat against "WTF does my system do now".

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• Access Domain over Wireless

  - by William

  I have an active directory server and all hard wired clients connect perfectly fine. However any wireless clients do not recognize that they are connected to the domain, despite the dns server being appropriately set to the domain controller for both wired and wireless connections. Also - both wired and wireless clients are on the same subnet. I am using a Verizon food actiontec router. What am I missing? For instance, this is the same computer connected first via an Ethernet cable and second via the wireless.

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• Override some DNS records and delegate others to another nameserver

  - by Addev

  I'm starting playing with nameservers. Currently I have: A domain: mydomain.com Access for writing the whois ns records. Access for writing DNS records at the domain hosting provider. nsX.foo.com A shared (hostC) hosting which cPanel writes in the nameserver of nsX.bar.com Basically I want the following structure: hostA.mydomain.com -> hostA hostB.mydomain.com -> hostB hostC.mydomain.com -> hostC mydomain.com -> hostC *.mydomain.com -> hostC Whats the correct way of configuring this? By the way I have configured the following records hostA.mydomain.com IN A [IP_OF_hostA] (at foo.com nameservers) hostB.mydomain.com IN A [IP_OF_hostB] (at foo.com nameserver) But now I dont know how to specify that @.mydomain.com and *.mydomain.com are resolved by the ns1.bar.com and ns2.bar.com, and it is hard to try with the delays after editing the records.

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• Storage sizing for virtual machines

  - by njo

  I am currently doing research to determine the consolidation ratio my company could expect should we start using a virtualization platform. I find myself continually running into a dead end when researching how to translate observed performance (weeks of perfmon data) to hdd array requirements for a virtualization server. I am familiar with the concept of IOPs, but they seem to be an overly simplistic measurement that fails to take into account cache, write combining, etc. Is there a seminal work on storage array performance analysis that I'm missing? This seems like an area where hearsay and 'black magic' have taken over for cold, hard fact.

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• a safer no password sudo?

  - by Stacia

  Ok, here's my problem - Please don't yell at me for being insecure! :) This is on my host machine. I'm the only one using it so it's fairly safe, but I have a very complex password that is hard to type over and over. I use the console for moving files around and executing arbitrary commands a LOT, and I switch terminals, so sudo remembering for the console isn't enough (AND I still have to type in my terrible password at least once!) In the past I have used the NOPASSWD trick in sudoers but I've decided to be more secure. Is there any sort of compromise besides allowing no password access to certain apps? (which can still be insecure) Something that will stop malware and remote logins from sudo rm -rf /-ing me, but in my terminals I can type happily away? Can I have this per terminal, perhaps, so just random commands won't make it through? I've tried running the terminal emulations as sudo, but that puts me as root.

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• Windows 7 Hibernate Problem

  - by goygoycu

  I cannot hibernate windows. When I click "hibernate", my laptop(windows) just locks and the screen goes black. I can unlock without any problem. I do not have any problem with other options such as "sleep" or "shut down". I updated the chipset drivers but it did not help. There is not any option in BIOS about the sleep modes. "Hibernate" is "on" on Windows. Any advice? My Laptop specifications: MSI A5000 3gb system memory, Windows 7 Home Premium 32bit installed, Gentoo linux installed, Grub bootloader(MBR). Hard drive: Around 4gb of free space in windows partition.

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• Computers with Small Capacity SSD - For caching?

  - by RXC

  Recently, in newsletters from websites, I have been seeing computers for sale from manufacturers that include an HDD and an SSD but the SSD has a small capacity like 24 GBs. I don't know if this still holds true, but I learned that when building a computer, you would want to install your OS on your fastest hard drive. I do a lot of PC gaming, so I install my OS and games on my SSD, because I learned that games and many applications make lots of system calls to the OS and performance can only be as fast as the slowest piece. Why these computers come with small capacity SSDs? Most OS's take up around 20 to 30 GBs of space, so what are the benefits of such a small SSD? Are these small size SSDs for caching? and what exactly does caching mean (what does it do and how does it help)?

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• Which rdisk value in boot.ini maps to which disk?

  - by MA1

  Following are the contents of a sample boot.ini: [boot loader] timeout=30 default=multi(0)disk(0)rdisk(0)partition(1)\WINDOWS [operating systems] multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Microsoft Windows XP Professional" /NOEXECUTE=OPTIN /FASTDETECT multi(0)disk(0)rdisk(0)partition(2)\WINNT="Windows 2000 Professional" /fastdetect multi(0)disk(0)rdisk(1)partition(1)\WINDOWS="Microsoft Windows XP Home Edition" /NOEXECUTE=OPTIN /FASTDETECT The rdisk value tells the physical disk number. So, if I have three hard disks say: /dev/sda /dev/sdb /dev/sdc Then how to know which disk (/dev/sda or /dev/sdb or /dev/sdc) is rdisk(0) and which disk is rdisk(1), etc.?

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• make a computer recognized as a usb flash drive?

  - by user137560

  Is there anyway to make a folder or a partition on a computer (Linux/windows) to act like a flash drive to other computers or devices when connected with a usb cable. For example, I have a windows 7 computer with 2 partitions c and d, then connect that computer to another computer or a smart TV using a USB cable (has to be male to male USB cable) then the other computer or TV recognizes the current computer as a usb device. Is that possible, if not is there any usb switch to connect an external hard drive or flash drive to both the computer and TV without the need to manually switch them (I know about some USB switches but they only support automatic switching with some certain types of printers, not with mass storage) Thanks in advanced! Sam

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• Increase Volume of an MKV Video from Linux Terminal

  - by The How-To Geek

  I've got a large amount of .MKV video files which seem to all play at a very low volume - I end up having to turn the TV up all the way to hear them, which is really irritating when I switch to another channel and wake the dead because it's so loud. What I'm looking for is a command-line method to increase the volume (so I can run it on all of them quickly) that would hopefully work regardless of the audio codec in use in the particular file. (I don't mind hard-coding the output audio though). For reference, I'm using Ubuntu 9.04 on my server, and the files are being played back with Boxee on a Mac Mini, but the volume problem is the same on Windows too.

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• how do I list Distribution Group (List) and their members inside of an OU using AD or exchange 2010

  - by wraak

  our entire domain has thousands of distribution groups, while i can use the script referenced here: How to get a list of all Distribution Lists and their Members in Exchange 2007? to pull all distribution groups and their members, it would be too hard to filter through all results. I particularilly need to pull either a. (preferred) all groups (both distribution and security) and their members inside of an OU (this particular OU contains over 100 hundred groups) or b. all groups and members matching a name starting with exampl* dsquery | dsget looks like could almost serve that purpose however when i did: dsquery group "OU=my-department,DC=blah,DC=blahblah,DC=com" -name * | dsget group -members (-expand) c:\my-department.txt it displays only the members without showing which group they belong to. The output I need should have: group name, members and potentially expanded sub-groups. i am still researching on how to get this done, seems like i can somehow make the above referenced script to search only inside of an OU, but i am not very familiar with powershell. any help would be appreciated, thank you.

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• Install Windows 8 (clean) on Hybrid Drive

  - by Ananthakrishnan Ravi

  I have a Sony Vaio T series (UEFI) that consists of a Hybrid Drive (SSD + HDD). I would like to install Windows 8 on the SSD and keep the Program files and other applications on the hard disk. What I could perceive was to keep the SSD as the System Drive. I'm able to install the OS on the SSD, but I run into some issues where I don't see the Microsoft Store App on my system and there are no apps on Windows 8. I tried using this blog post but doesn't seem to fit for Windows 8. Any help in this regard would be great. I would like the Windows 8 alone on the SSD, I don't care about the space wasted on the SSD and install other programs on my HDD. Thanks

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• Windows 8 Update on Bootcamp

  - by RazorSharp

  I currently have Windows 8 Consumer Preview installed on a Mac Bootcamp Partition. Microsoft recently released the Windows 8 Release Preview, and I'd like to upgrade, but I'm worried that upgrading to the Release Preview (while in the Windows 8 partition) will erase my other partitions (ex. the Mac OS X partition). By upgrading from Consumer to Release (using the installer on Microsoft's website) while IN the Windows 8 partition, will it end up re-formating the whole hard drive / erasing partitions / removing Mac OS X? Are there any 100% positive answers out there? Will this work, and if not then how would you suggest updating? Note: I have a Time Machine backup of my Mac, but it isn't the WHOLE Mac.

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• For web development which is more important - CPU and Graphics card OR Ram and SSD Harddrive?

  - by adam

  Buying a laptop is always hard work and questions about specific models dont age well on forums. A popular dilema (especially with apple macbooks) is whether to spend more for a faster cpu and graphics card but settle for standard ram and hd OR drop down and spend the savings on more ram and a faster harddrive such as a ssd. Im wondering for web development i.e. ide, unit tests, photoshop work and some user testing screen capturing now and again what would provide better performance. ( No games, music production or spielberg standard video editing.) For examples sake the current apple lineup for their 15inch macbookpros. 2.66 cpu i7 4gb ram 5400rpm drive 4gig ram vs 2.4 cpu i5 8gb ram 124gb sdd roughly the same price.

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• Black Screen on Startup even after running chkdsk

  - by phwd

  I started an old (Dell Inspiron 2200) the startup goes all the way to Microsoft Windows XP Logo then I get a black screen. I am still able to move the cursor but that is about it. I tried running Recovery console (from CD) with chkdsk command. First time it said they were errors. I decided to do a fixboot and see if the errors went away. They did. Restarted and still no luck. If there are commands that I can call either from recovery console or elsewhere to further describe the problem please tell me and I will re-edit the question. srvtag:7XNSG81 Also what are my full range of options before wiping the hard-drive (if that is even the problem) I want to exhaust all options before replacing hardware.

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• why can’t I see my Hardrive for my compaq mini 110c from A windows Xp installation on usb stick?

  - by sludog1

  I have a Compaq mini 110c-1100dx and I'm having a terrible time trying to reinstall windows. I dont have a external CD drive and REALLY dont want to pay HP 200bux for one. so, I've been TRYING to reinstall WinXP from a flashdrive and I have it to the point where the XP installation gets past the Agreement, but then the netbooks hard drive is not showing up, it's jus giving me the option to install WInXP onto the flash drive, registering as C:. I've tried using nLite to add extra drivers to the WinXP "cd" but I dont think I have the correct HD drivers and I am stuck. ANY help at all be great

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• Gigabit connection between 2 computers

  - by Alecu

  I am trying to set up a connection between 2 pc's. It's a direct cable connection. The problem that I am having is that the connection isn't gigabit. I know both network cards support gigabit. I checked in the device settings and in one pc I can see in the Speed & Duplex the 1Gbps option but on the other pc I can't see that option despite the fact that the network card is gigabit. I have quite some files to copy from one pc onto another and I really need a good connection between them. I can't really remove the hard drive because it would void the warranty. Could this be a driver issue or a cable issue? On both pc's I have windows 8. The network card on the pc that doesn't have the 1 gbps option is an Atheros ar8161 card.

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• Rebuilding a file if files have changed

  - by Todd Strauch

  I'm having a hard time wrapping my head around this. It seems trivial, but I'm not getting it. I have two files. If either of those two files changes, I want to rebuild one of them. Essentially: if file a changes or file b changes then file {"a": content => template('a.erb', 'b.erb'), } I know I can audit a file for change, I just don't know how to include that within a conditional. Can anyone point me in the right direction?

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• I lost /dev/md2 on my server

  - by sten

  Hi, My 2 hard drives fried at the same moment apparently. My host company rebooted my server in rescue mode and I am trying to recover my data. They told me to mount /dev/sda2 to recover the data I need but, looking at a similar server that I have in pool, the data I'm looking for should be instead in /dev/md2. I can find /dev/md0 but not /dev/md2 (nor /dev/md1). I've looked on several places on the web and I could only find messages explaining how to create new partition. I just need to recover some data, not all of it and I'll be glad if anyone could help me to mount the /dev/md2 folder (or any other trick that would allow me to recover the data that was stored there). Thanks in advance, Sten

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• Using Redirect for an SSL CDN to have a Custom Domain

  - by bendytree

  We're looking to move our website/app assets to a CDN. The problem is, our CDN doesn't offer custom domain names with SSL. In other words, for SSL they offer https://1234.cdn.hostingcompany.com but not https://assets.mysite.com. So this seems like a huge problem since I don't want to re-publish my app with their domain hard coded. So I read somewhere about a method where you send people to https://assets.mysite.com then redirect to https://1234.cdn.hostingcompany.com. Is there merit to that solution or would that completely defeat the purpose of the CDN.

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• Best linux distribution for Java build server & ...

  - by ashkanr

  Hi all, we are trying to setup a build server for building our Java projects. Following software will be installed: * Subversion * Jira/Confluence/Crucible/Fisheye ... * Bamboo (continuous integration solution) I have 2 questions: 1. Which dist of linux is better suited in your opinion? Our current candidates are: openSUSE, CentOS, Gentoo, Mandriva. 2. Is it possible to build something like an image after finishing setup process and burn it on hard drive for next customers without need to repeat all installation and config process? Thanks in advance,

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• Boot custom linux up by pressing Lenovo OKR button?

  - by Semmu

  I have a Lenovo Y510p laptop and I'm a Linux user, use Windows only for gaming. The device had no OS when I bought it and I also installed an SSD besides the 1TB hard drive. I would like to "hack" the One-Key-Recovery button, because I have no interest in its default behaviour (I don't need Windows recovery), but if I could boot up a hidden, fail-safe Linux with it, that would be great. How could I achieve it? I tried to search what the button does, but I only found some installers for Windows that could magically create a partition for the recovery. I would like to override this behaviour completely to boot up something else.

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• Replacement for NewSID when working with Windows 7?

  - by sbussinger

  Has anyone got a lead on a replacement for the old SysInternals NewSID utility that will work for Windows 7? I found out the hard way that NewSID will totally hose a Win7 setup (BSOD on reboot). Apparently the same problem occurs for Server 2008 R2. They've officially announced that NewSID will be retired in November, possibly because of this issue. I'm aware of SYSPREP, but it's not a clean replacement in my case so I was hoping that there was another utility similar to NewSID that worked with Win7. Reworking our system to use SYSPREP will be ugly and slower as well. Any thoughts on another alternative? Thanks!

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• In terms of load handling, which is better: one server or two of equivalent power?

  - by seldary

  My goal is to figure out if i'm better off with one strong server, or multiple weaker servers with a load balancer. Does the fact of splitting the load between servers have an effect on the total load my website could take? It's hard to single that out, because there are of course a lot of parameters that affect the results, so some assumptions: Putting failover considerations aside - I know it matters, but for the sake of the question's simplicity, lets assume nothing fails. The servers in the multiple servers option have an accumulated "power" equivalent to the one server option (about the same amount of cores and RAM space). If that is too theoretical, here is a concrete question that could help: Suppose I have several instances of exactly the same server - lets call it S. Suppose that server S can serve a load of up to X calls per time unit. Will two S servers with a load balancer serve 2X calls per time unit? significantly more? significantly less?

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