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  • Re-Initialize RAID-0 in software after card failure

    - by Ben
    I'm working on a Friend's WD MyBook "1TB" HDD that is not mounting. When I got in to it, I discovered that it is really 2 500GB HDD's set up as RAID-0. It appears that the drives themselves are fine, but that the logic board has failed. My questions is this: can I re-initialize the RAID-0 using software RAID so that I can recover the data to another drive? If so, how and which software RAID would be best (Preferably open source. any platform OK).

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  • Passwordless ssh failed when login using username

    - by Aczire
    I was trying to setup Hadoop and was stumbled on passwordless ssh to localhost. I am getting a password prompt when trying to connect using ssh username@hostname format. But there is no problem connecting to the machine like ssh localhost or ssh hostname.com. Tried ssh-copy-id user@hostname but it did not work. Using CentOS 6.3 as normal user, I neither have root access or am a sudoer so editing any files like sshd_config is not possible (not even cat the sshd_config file contents). I hope the user login is possible since I can do login without password to localhost, right? Please advise, Here is the ssh debug output. [[email protected] ~]$ ssh -v [email protected] OpenSSH_5.3p1, OpenSSL 1.0.0-fips 29 Mar 2010 debug1: Reading configuration data /etc/ssh/ssh_config debug1: Applying options for * debug1: Connecting to hostname.com [::1] port 22. debug1: Connection established. debug1: identity file /home/user/.ssh/identity type -1 debug1: identity file /home/user/.ssh/id_rsa type -1 debug1: identity file /home/user/.ssh/id_dsa type 2 debug1: Remote protocol version 2.0, remote software version OpenSSH_5.3 debug1: match: OpenSSH_5.3 pat OpenSSH* debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_5.3 debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug1: kex: server->client aes128-ctr hmac-md5 none debug1: kex: client->server aes128-ctr hmac-md5 none debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP debug1: SSH2_MSG_KEX_DH_GEX_INIT sent debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY debug1: Host 'hostname.com' is known and matches the RSA host key. debug1: Found key in /home/user/.ssh/known_hosts:1 debug1: ssh_rsa_verify: signature correct debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug1: SSH2_MSG_NEWKEYS received debug1: SSH2_MSG_SERVICE_REQUEST sent debug1: SSH2_MSG_SERVICE_ACCEPT received debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic,password debug1: Next authentication method: gssapi-keyex debug1: No valid Key exchange context debug1: Next authentication method: gssapi-with-mic debug1: Unspecified GSS failure. Minor code may provide more information Credentials cache file '/tmp/krb5cc_500' not found debug1: Unspecified GSS failure. Minor code may provide more information Credentials cache file '/tmp/krb5cc_500' not found debug1: Unspecified GSS failure. Minor code may provide more information debug1: Unspecified GSS failure. Minor code may provide more information debug1: Next authentication method: publickey debug1: Offering public key: /home/user/.ssh/id_dsa debug1: Server accepts key: pkalg ssh-dss blen 434 Agent admitted failure to sign using the key. debug1: Trying private key: /home/user/.ssh/identity debug1: Trying private key: /home/user/.ssh/id_rsa debug1: Next authentication method: password [email protected]'s password:

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  • What is this dm-0 device?

    - by Jeff Shattock
    While poking around trying to figure out why a Linux - Linux file transfer is running slower than I think it should, I stumbled across something I'm not familiar with. /dev/dm-0 seems to be my bottleneck, but I have no idea what it is. On my destination server, the iostat command shows a device at the bottom, /dev/dm-0, as being 100% utilized. This server has 6 disks in a mdadm raid5 set, with LVM running on top of it. Each of the underlying disks are sitting around 50% util. The transfer is writing to a logical volume located on this raidset. What is this /dev/dm-0 thing? Once I know what it is, maybe I can find how to increase its speed, or at least understand why its the speed that it is.

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  • public key infrastructure - distribute bad root certificates

    - by iamrohitbanga
    Suppose a hacker launches a new Linux distro with firefox provided with it. Now a browser contains the certificates of the root certification authorities of PKI. Because firefox is a free browser anyone can package it with fake root certificates. Can this be used to authenticate some websites. How? Many existing linux distros are mirrored by people. They can easily package software containing certificates that can lead to such attacks. Is the above possible? Has such an attack taken place before?

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  • Chat client/server that offers certain options.

    - by MrStatic
    A few friends of mine and including me for the past few years have hosted an irc server on one of our dedicated servers. We use it for just personal reasons. We like the aspect of it that it allows private messages and chat rooms. Plus the ability to send/receive files and is cross platform (Linux/Mac/Windows/Mobile). Our domain is about to expire and we are looking to move onto something new. So we are looking for a chat client / server that offers the following: Chatroom (multiple people chatting together in the same box) File transfers Private messages Cross Platform (especially mobile ie: Blackberry and Android) We don't have to host it but that isn't out of the question Logging on the client side (we say a lot of crap and like to go back and quote said crap) SSL/TLS Some sort of encryption some of the stuff said/sent is of a sensitive nature ie: business nature

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  • How do I setup a systemd service to be started by a non root user as a user daemon?

    - by Hans
    I just finished the install and setup process of systemd on my arch-linux system (2012.09.07). I uninstalled initscripts (and removed the configuration files). What I want to do is create a service that can be started and stopped by a non-root user. The service is to start a detached screen session running rtorrent. However I want every user on the system who has set this service to start (enabled) to have a particular instance started for them specifically. How would one go about doing this? I remember reading that systemd supports user instances of services, however I have been unable to find any information on how to set this up, or whether it relates to what I am looking for. Service file that I have used for system: [Unit] Description=rTorrent [Service] Type=forking ExecStart=/usr/bin/screen -d -m -S rtorrent /usr/bin/rtorrent ExecStop=/usr/bin/killall -w -s 2 /usr/bin/rtorrent

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  • I can't connect to my network, except in safe mode

    - by eidylon
    My laptop cannot connect to my network all of a sudden except in safe mode. When it boots, it will show the networks available in the tray popup, but if I click connect on any, it says "Unable to connect" and the troubleshooter is useless. Shortly thereafter all the networks disappear. I have tried removing IPv6 support as I have seen that cause problems. No joy. I've also tried removing the wireless network adapter in Device Manager and reinstalling it, also no joy. I've also tried attaching a USB wireless adapter, and it has the same problem. If I boot in safe mode, then it has no problems at all. Three other devices in the house connect fine, so I am pretty sure it is nothing to do with the router. Any ideas what to check next? I am running Win7 Ultimate on a 2GHz Quadcore with 8GB RAM with a Broadcom 802.11n wireless card. EDIT: RE wired connections: What is very weird is that if i plug in a wired connection, then not only does it connect via the wired connection, but the wireLESS also starts working perfectly. And a soon as I unplug the wire, then the wireLESS stops working again! So it seems the wireless is right now working only in safe-mode, or when a wired connection is also plugged in.

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  • Separating two networks

    - by Farhan Ali
    I have two routers, R1 and R2. R1 (a stock linksys router running dd-wrt) is connected to internet and is serving internet to a network of 5 devices/PCs running a DHCP server, with a network of 192.168.1.0/24. R1 also serves internet services to R2. R2 (a ubuntu server 12.04) gets internet from R1. R2 has 3 PCs attached to it, runs a DHCP server with a network of 172.22.22.0/24. My requirement is that the clients on both sides should not talk to each other at all – with the exception that R1 clients may access the R2 router through its IP of 192.168.1.x. At the moment, R2 clients are able to ping R1 clients, which is unacceptable, whereas R1 clients cannot ping R2 clients, which is OK. I believe iptables could be set up but I don't know how.

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  • Where can I learn various hacking techniques on the web?

    - by Carson Myers
    I would like to try my hand at hacking -- that is, exploiting various website vulnerabilities. Not for any illegal purpose mind you, but so I can have a better understanding and appreciation of these exploits while writing my own web software. I seem to recall that there was a community that hosted a bunch of demo websites, and you had to find and exploit certain vulnerabilities with each one. I can't remember what it is called but this is the sort of thing I am looking for -- I have read a tonne of little XSS and CSRF examples but have yet to find a real-life hands-on example of one. Does anyone know of such a place, where I can be given an example page and look for security holes? I would really rather not try this with actual websites, I don't want to break any laws.

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  • Connect to SVN through Eclipse on Ubuntu

    - by Gene R
    We have a Subversion server running on an internal server. I'm trying to connect to it through SubClipse (Eclipse) on Ubuntu. When I enter the URL: svn://servername/site/trunk as I do from Windows. I get the following error: Error validating location: "org.tigris.subversion.javahl.ClientException: svn: Malformed network data" Anybody got any ideas?

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  • grep beginning of file?

    - by user13743
    In a linux shell, I want to make sure that a certain set of files all begin with <?, having that exact string and no other characters at the beginning. How can I grep or use some other to express "file begins with"?

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  • Can 'screen' grab an existing process and tie itself to it?

    - by warren
    Scenario: Started a process that's going to take "a while" to complete outside of screen. Need to leave the terminal / netowrk hiccups Process lost Would be nice if: Started a process outside of screen Realize error Run screen <magic-goes-here> and it grabs the active process to itself From the man pages and --help info, I don't see a way this can be done. Is this possible directly with screen? If not, is it possible to change the owning shell of a process, so that the bash (or other shell of your choosing) instance inside screen can have a command run which will change the parent shell of the initial process to itself from the originator?

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  • CentOS 6.0 yum audacity dependency

    - by Kaemic
    I'm trying to install audacity on centos using yum and I cant force yum to resolve all dependencies, here's what i got, can someone help me with it (when I download the rpm file and click-installit i get the dependency problem too): # yum --disablerepo=c6-media install audacity-1.2.3-2.2.el4.rf.i386.rpm Loaded plugins: fastestmirror, refresh-packagekit Loading mirror speeds from cached hostfile * base: mirror.karneval.cz * centosplus: mirror.karneval.cz * extras: centos.vieth-server.de * rpmforge: fr2.rpmfind.net * updates: mirror.karneval.cz Setting up Install Process Examining audacity-1.2.3-2.2.el4.rf.i386.rpm: audacity-1.2.3-2.2.el4.rf.i386 Marking audacity-1.2.3-2.2.el4.rf.i386.rpm to be installed Resolving Dependencies --> Running transaction check ---> Package audacity.i386 0:1.2.3-2.2.el4.rf set to be updated --> Processing Dependency: wxGTK >= 2.4.0 for package: audacity-1.2.3-2.2.el4.rf.i386 --> Processing Dependency: libwx_gtk-2.4.so.0 for package: audacity-1.2.3-2.2.el4.rf.i386 --> Processing Dependency: libwx_gtk-2.4.so.0(WXGTK_2.4) for package: audacity-1.2.3-2.2.el4.rf.i386 --> Running transaction check ---> Package audacity.i386 0:1.2.3-2.2.el4.rf set to be updated --> Processing Dependency: libwx_gtk-2.4.so.0 for package: audacity-1.2.3-2.2.el4.rf.i386 --> Processing Dependency: libwx_gtk-2.4.so.0(WXGTK_2.4) for package: audacity-1.2.3-2.2.el4.rf.i386 ---> Package wxGTK.i686 0:2.8.12-1.el6.rf set to be updated --> Finished Dependency Resolution Error: Package: audacity-1.2.3-2.2.el4.rf.i386 (/audacity-1.2.3-2.2.el4.rf.i386) Requires: libwx_gtk-2.4.so.0 Error: Package: audacity-1.2.3-2.2.el4.rf.i386 (/audacity-1.2.3-2.2.el4.rf.i386) Requires: libwx_gtk-2.4.so.0(WXGTK_2.4) You could try using --skip-broken to work around the problem You could try running: rpm -Va --nofiles --nodigest

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  • Silent install FirePro v4900 Driver on Windows Embedded 7 Standard

    - by Birgit_B
    I'm trying to install the Drivers for a FirePro v4900 on a Windows Embedded 7 Standard 64bit OS. I want the system to be as small as possible, so i would rather not install the whole catalyst control center, but only the necessary drivers. Because the installation should be accomplished absolutely unattended, the installation process of the FirePro-Driver should also be done without any user interaction. I see two possible solutions for the Problem: Install only the Drivers: Is it possible to solely install the necessary drivers? How would i achieve that? This solution would be the preferred one, because of the smaller footprint. Silent custom install the provided "FirePro_8.911.3.3_VistaWin7_X32X64_135673.exe" (found at ATI FirePro™ Driver). Is there a way, to do that? Thank you in advance for your support! Update: I managed to accomplish a silent installation. I extracted the contents of the above mention installer-file and ran \$_OUTDIR\Bin64\Setup.exe -Install. (There are some other Parameters, just run Setup.exe /?). But i couldn't achieve to just install the drivers without the Cataclyst Control Center, and it seams the Control Center has some unfulfilled dependencies and so it crashes...

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  • How to create an "hybrid" usb stick?

    - by rdesign
    Hey guys, I was wondering how to make an hybrid usb stick. That means a usb stick that runs under mac and windows and displays specific content. Example: Plug in on win : index.html opens. Mac os X files are invisible. Plug in on mac: indexMac.html opens. Win files are invisible. I know that every usb stick can be read by both platforms. The Apple Mac os X CD is something which inspired me. thanks a lot.

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  • Buffer Overflow errors when reading ConfigDelay and Manufacturer info from registry

    - by peter
    Hi All, This is a strange driver error which doesn't make a lot of sense to me. I am running an application developed in C# .NET which our company develops. I was monitoring the application using process monitor and noticed that it accesses the registry a lot. The output on Process Monitor looks like this, Operation Result Path RegQueryValue Success HKLM\System\CurrentControlSet\Enum\SWMUXBUS\SW_MODEM\7&6c4af30&0&5&0004\Driver RegQueryValue Success HKLM\System\CurrentControlSet\Control\Class\{4D36E96D-E325-11CE-BFC1-08002BE10318}\0000\Properties RegQueryValue Success HKLM\System\CurrentControlSet\Control\Class\{4D36E96D-E325-11CE-BFC1-08002BE10318}\0000\Default RegQueryValue Success HKLM\System\CurrentControlSet\Control\Class\{4D36E96D-E325-11CE-BFC1-08002BE10318}\0000\InactivityScale RegQueryValue Name Not Found HKLM\System\CurrentControlSet\Control\Class\{4D36E96D-E325-11CE-BFC1-08002BE10318}\0000\PowerDelay RegQueryValue Name Not Found HKLM\System\CurrentControlSet\Control\Class\{4D36E96D-E325-11CE-BFC1-08002BE10318}\0000\ConfigDelay RegQueryValue Buffer Overflow HKLM\System\CurrentControlSet\Control\Class\{4D36E96D-E325-11CE-BFC1-08002BE10318}\0000\Manufacturer RegQueryValue Buffer Overflow HKLM\System\CurrentControlSet\Control\Class\{4D36E96D-E325-11CE-BFC1-08002BE10318}\0000\Model RegQueryValue Name Not Found HKLM\System\CurrentControlSet\Control\Class\{4D36E96D-E325-11CE-BFC1-08002BE10318}\0000\Version The app is reading this stuff every 5 seconds from the registry, so I would ask a few questions, 1) What is this stuff 2) Why is the app reading this stuff 3) Why is it saying 'Buffer Overflow' 4) Could this cause performance problems for my app? From what I can see the app does not explicitly read this stuff, so I think this relates to a driver on the machine (which is a netbook)

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  • Alternatives to using email (in particular, Outlook) as a knowledge store?

    - by Umber Ferrule
    I suspect that, like many people, I use my work email account (accessed via Outlook 2007) to store information. I generally try to group similar things in folders and sub-folders, but with a multitude of folders this gets very unwieldy. In particular, it can be a bind to locate things using Outlook's tree structure. (As an aside: I've yet to come across a good free search add-on for Outlook.) I realise Outlook is not the best place to store all my information and I'd prefer not to. In an ideal world I'd like to be able to organise all of the information stored in Outlook in a MindMap (my software of choice being Freemind) or Wiki. To maintain an email audit-trail, I've considered saving individual emails as files using a MindMap or Wiki to link them. What do people think of this? (I can't say I relish the thought of the exporting process!) Whatever I do is going to involve some pain (i.e. setting up a Wiki/MindMap) or sticking with what Outlook provides currently. Has anyone been in the same position? Has anyone mass-migrated information from Outlook? If so, what was the best way? Any ideas or alternative proposals?

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  • How to fix monitor detection on Windows 7?

    - by Boaz
    Hi, I'm using Windows 7 + Windows Media Center for my HTPC. It works great except from one annoying issue. Whenever I turn off my TV while listening the music, the music stop for a second or while Windows 7 tries to figure out what monitor is attached. After that second it settles down on a default 800x640. While not a big deal, it is annoying as I don't want to have the TV on while playing music. Is there anyway to fix the monitor/disable monitor auto-detection on Windows 7 so it would not start recalibrating everything when I turn off my TV? Thanks, Boaz

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