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• cups log kills ubuntu 12.04 and sudoer permissions changed

  - by peterretief

  I am using Ubuntu 12.04 as a desktop and recently had a weird crash with the log file for cups filling up the entire drive and not letting me back in, also what changed was /var/lib/sudo had changed from root to peter (me) I didn't make this change - I checked the history! I set the sudoers back to root and capped the max size for cups log Anyone had a similar experience? It feels like someone is messing around with my settings Is there any way to trace how the error occurred? Logs auth.log Jan 1 02:04:13 peter-desktop lightdm: pam_unix(lightdm:session): session opened for user lightdm by (uid=0) Jan 1 02:04:13 peter-desktop lightdm: pam_ck_connector(lightdm:session): nox11 mode, ignoring PAM_TTY :0 Jan 1 02:06:53 peter-desktop lightdm: pam_unix(lightdm:session): session opened for user lightdm by (uid=0) Jan 1 02:06:53 peter-desktop lightdm: pam_ck_connector(lightdm:session): nox11 mode, ignoring PAM_TTY :0 syslog Jan 1 02:04:13 peter-desktop rsyslogd: [origin software="rsyslogd" swVersion="5.8.6" x-pid="903" x-info="http://www.rsyslog.com"] start Jan 1 02:04:13 peter-desktop rsyslogd: rsyslogd's groupid changed to 103 Jan 1 02:04:13 peter-desktop rsyslogd: rsyslogd's userid changed to 101 Jan 1 02:04:13 peter-desktop rsyslogd-2039: Could not open output pipe '/dev/xconsole' [try http://www.rsyslog.com/e/2039 ] Jan 1 02:04:13 peter-desktop bluetoothd[898]: Failed to init gatt_example plugin Jan 1 02:04:13 peter-desktop kernel: [ 0.000000] Initializing cgroup subsys cpuset Jan 1 02:04:13 peter-desktop kernel: [ 0.000000] Initializing cgroup subsys cpu Jan 1 02:04:13 peter-desktop kernel: [ 0.000000] Linux version 3.2.0-25-generic-pae (buildd@palmer) (gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5) ) #40-Ubuntu SMP Wed May 23 22:11:24 UTC 2012 (Ubuntu 3.2.0-25.40-generic-pae 3.2.18) Jan 1 02:04:13 peter-desktop kernel: [ 0.000000] KERNEL supported cpus: Jan 1 02:04:13 peter-desktop kernel: [ 0.000000] Intel GenuineIntel Jan 1 02:04:13 peter-desktop kernel: [ 0.000000] AMD AuthenticAMD Jan 1 02:04:13 peter-desktop kernel: [ 0.000000] NSC Geode by NSC

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• Huh? JDK not found? (on Windows 7 64-bit)

  - by Android Eve

  I am setting up a development environment for the latest Android 2.3 on a fresh install of Windows 7 64-bit. I first installed the 64-bit JDK 6 (jdk-6u23-windows-x64.exe). Then, I installed 64-bit Eclipse Classic 3.6 (eclipse-SDK-3.6.1-win32-x86_64.zip). Then, I proceed to install the Android SDK Starter Package: installer_r08-windows.exe. But... upon start it says: "Java SE Development Kit (JDK) not found." Why? I just installed it. Is this a mismatch between 32-bit and 64-bit? How do I solve this? Update (1): I tried setting the %JAVA_HOME% environment variable, as well as setting the Installed JREs in Eclipse, as suggested below. None of these solved the problem. It appears that I am not the only experiencing the problem, as this thread suggests: http://stackoverflow.com/questions/1919340/android-sdk-setup-under-windows-7-pro-64-bit I wonder whether there is a 64-bit version of the Android SDK. Update (2): I used the zip version instead (android-sdk_r08-windows.zip), ran android.bat, updated all SDK packages, and installed the ADT plugin (8.0.1), not before having to check: 'Contact all update sites during install to find required software'. We'll see how this goes... Update (3): It worked! (going to accept @bubu's answer shortly) -- but why doesn't the emulator include the HelloAndroid app when I run it (Ctrl+F11) from Eclipse?

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• fail2ban log parsing too slow on Raspberry Pi - options? [migrated]

  - by Gordon Morehouse

  I'm running fail2ban on a Raspberry Pi at 950MHz which I cannot overclock further. The Pi is occasionally subject to SYN floods on particular ports. I've set up iptables to throttle the rate of SYNs on the port of interest; when the throttle limits are exceeded, hosts which send SYNs are dropped into the REJECT chain and the particular SYN packet which exceeded the limit is logged. fail2ban then watches for these logged SYNs and, after seeing a few, temporarily bans the host for a short time (this is a transient issue in the app I'm working with). The problem is that the SYN floods can occasionally reach rates which are too fast for fail2ban to keep up with; I'll see 20-40 log messages per second, and eventually fail2ban falls behind and becomes ineffective. To add insult to injury, it continues consuming a LOT of CPU as it tries to catch up. I have verified that DROP chained packets from hosts already banned by fail2ban are not logged, and thus do not add to its load. What are my options here? I have a few ideas, but no clear path forward. Could I make the log-parse regex "easier" so it takes fewer cycles? Would using iptables --log-prefix to put a token near the start of the log message, and/or otherwise simplifying/altering the fail2ban regex help? Here is the current fail2ban config line containing a regex: failregex = kernel:.*?SRC=(?:::f{4,6}:)?(?P<host>[\w\-.^_]+) DST.*?SYN Is there a faster way for fail2ban to watch for the packets exceeding the limits than parsing kern.log? Could fail2ban be run under PyPy instead of CPython with minimal nonstandard wizardry (the OS is Raspbian 7, so, mostly Debian 7)? Is there something better than fail2ban that I could use to watch for the packets which exceed the SYN limits, and after N exceeds in X seconds, temporarily put the offending IP into the iptables DROP bucket, and take it out when the ban timer expires? Again, I'd vastly prefer a solution that uses as much software available in Debian as possible, though I can build Debian packages in a pinch.

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• IE9 will not navigate to some websites but Google Chrome can

  - by Storchburp

  Was recommended by a friend to ask for help here. I am using Internet Explorer 9. As of two days ago I was suddenly unable to navigate to any part of the following websites: www.computerandvideogames.com www.deviantart.com www.cnet.com However I can still access all of them normally through Google Chrome. I am on a college network but these sites are also accessible through fixed terminals provided by the school and are definitely not blocked. I do not know of any other sites similarly affected. There is no popup, no error message, no diversion to a site telling me I can't access / am blocked etc. I can be on www.google.com and attempt to access these sites through the URL or google search, and my cursor will just show the little moving blue wheel next to the arrow for a couple of seconds, and the page displayed on my browser will not change; ie. not navigating at all. Running antivirus software, changing proxy settings in IE, clearing cookies, unplugging/plugging in computer, restarting PC etc have not changed the situation. Any assistance or advice would be greatly appreciated. Thanks in advance.

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• Poor gaming performance with hyper-v installed in windows 8

  - by SnowCrash

  I am getting very poor gaming performance on my Windows 8 host OS with Hyper-V installed but no guest machines running. For example World of Tanks reports 60-70 FPS without Hyper-V installed and 4-14 FPS with it installed. A similar, dramatic, hit is observed in several other games so the issue is not WoT specific. To make the point clear, I am not trying to run games in a virtual machine. I don't even have a VM running while observing this effect. I simply have the Hyper-V feature installed. My system specs: AMD Phenom II 965 (3.4 GHz) AMD Radeon 6950 2GB (XFX Double D HD-695X-CDFC) 16GB DDR3 1333 AMD 790GX chipset Mainboard (Gigabyte GA-MA790GPT-UD3H) I have tried every AMD driver from 12.8 to the current 12.11beta8, virtualization is enabled in the BIOS settings, the onboard 3300HD video device is disabled in BIOS and I have read the MSDN blog entry here regarding a similar issue in Server 2008 that was resolved in 2008 R2 (and hopefully not regressed in Win 8). I'd like to be able to use Hyper-V for development and testing at home (I am a sysadmin/software developer professionally). If, however, I can't also use my home system for entertainment I'll have to scrap those plans.

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• Symbolic directory link shared in domain

  - by Sabre

  We have a file server that is 2008R2 STD, it is a member server in a 2008 AD. I need to relocate some of the files and directories and would like to do it behind the scenes more or less without impacting the users. (Reason for this is that some of the files, due to recent software changes, HAVE to be located locally on one of the workstations, but they can be accessed by other applications remotely.) So symbolic links seem the panacea here, I moved a directory to another network share in the same domain (Windows 7 professional), created a symlink to it in the location it used to be in, named it the same thing, and to the local user it seems almost transparent. I.E. When logged into the desktop of the file server, I can go to the directory, open the link, it leaps to the other share as if it were local, exactly what would be expected. Then I tried it from another client computer (Windows 7 professional as well), went through the normal provisioning of R2R and L2R with fsutil... No joy. What I am getting is an access denied "Logon failure: Unknown username or bad password." using the same account that I log on locally to the file server with (Which happens to be the domain admin) So I cannot believe it is telling the truth, or... I assume it is not passing the credentials I am connecting to the first share all the way through the symlink. The end result is I want users on the domain to browser to share A, inside share A is a mixture of directories/files that reside there, and symlinks to directories/files on the second machine over the network in the same domain. Possible? Or am I misunderstanding how the symlink should work?

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• Redundant Microsoft server solution for small company

  - by MadBoy

  I'm planning to change one server Microsoft SBS 2003 with SharePoint, Exchange and SQL database into something that will provide me with some redundancy and won't be single point of failure. I was thinking to buy 2x exactly the same physical servers and put 2 virtualized servers on HyperV or VMWare on each. Then i would put SharePoint, Exchange and SQL on that 1 physical server (shared onto 2x VM's). I would like 2nd physical server to be exact duplicate of the first one so that when 1st server goes down (for reboot or hw failure), 2nd takes care of everything so that users don't even see anything changed (in terms all their emails, sharepoint stuff is available). My questions are: Will I have to pay for licenses for both servers even thou only one instance of SharePoint, Exchange, SQL will be used at same time? What are proposed solutions to do that? Any additional hardware I would need, any complicated software configuration to be expected to configure such redundancy so that when one physical server goes down 2nd one is taking care of rest? What problems should I expect? This solution is for 60 people. Later on it may or may expand.

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• Error 53 - The network path was not found.

  - by Jack

  I have a machine in my Active Directory Domain that I can no longer "net view" from other machines in the domain. This is a Windows XP Pro machine. It is hosting a VMWare virtual of my Domain Controller. If I attempt to net view [machine name] I get system error 53, The network path was not found. This is not a DNS issue, the same thing happens with the machine's IP. I don't think it's a firewall issue, I turned the firewall off on this machine. As I mentioned, it has worked in the past, and then stopped for no reason that I can see. I (intentionally) didn't change the software. I CAN get to the VMs hosted on this machine, can connect to their shares, net view them, etc. All other machines can see each other. In fact, the problem machine can see other machines and access their shares just fine. I tried removing the machine from the domain and re-adding it. I tried deleting the shares and recreating them. Not sure how to troubleshoot this any further. Any ideas?

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• How to stop DW20.exe running on Win 2003 Server

  - by Laurence

  Periodically my ASP.NET application crashes (usually because memory consumption exceeds maximum allowed by application pool) and DW20.exe starts up. This is a big problem because it uses huge amounts of memory and CPU for minutes at a time. I want to know how to stop DW20.exe from running. Please note, I have already tried these often mentioned solutions: Disabling error reporting in Control Panel System Advanced Error Reporting Disabling the Error Reporting Service Modifying the registry as in http://support.microsoft.com/kb/841477 (however I might have done this wrong - this doc says "add a DWReportee value of 1" - what I did was add a DWORD entry with hexadecimal value of 1 - is this right? Also only 2 of the 4 keys were present, so I only modified these, e.g. there was no HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\PCHealth key at all) So, zero points for suggesting any of the above (unless you can see I have modified the registry incorrectly)! Also zero points for suggesting I resolve whatever is causing the application crashes :) - I am figuring this out, I just want something in the mean time to stop DW20.exe eating up all the server resources. By the way, this is a Windows 2003 SP1 server, with IIS 6 and SQL 2005 installed. There is no MS Office.

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• Xen guests accessing LUNs

  - by mechcow

  We are using RHEL5.3 with a Clarion SAN attached by FC. Our situation is that we have a number of LUNs presented to Hosts and we want to dynamically present the LUNs to Xen Guests. We are not sure on what the best practice approach is to set this up. The Xen guests will form a cluster together and need the LUNs only for data partitions, i.e. when they are actively running services. So one approach would be to always present all disks to all Xen guests, and then rely up on the cluster software, and mount itself, to not mount the disk twice in two locations. This sounds kinda risky and also is not very secure (one cracked guest can see/destroy all the data). Another approach would be to dynamically add and remove the disks from the Xen guests at the dom0 level (using xm block-attach). This could work but sounds slightly complicated, I'm wondering whether Red Hat Cluster Suite supports this in some way or whether there are scripts to do this. Yet another approach would be to have the LUNs endpointed at the Xen guests themselves - I'm not sure whether this is technically possible since the multipathing has to be done at the Host level.

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• Installing FIREFOX with extensions/addons manually? (not really auto install)

  - by BrownChiLD

  I've been reading around with regards to creating firefox installers, bundling it w/ addons, using scripts, and CLI lines and a whole bunch of stuffs ... but it seems that going through this route is just too complicated and time consuming.. Since i don't mind a bit of manually copying files and stuff, I was planning to do the following: on my test machine, 1) install firefox on a machine AND configure it the way i want it 2) install addons AND set the configurations for it 3) set advanced configurations for firefox (about:config) Then once i'm all set, I just simply copy the contents of the firefox/profiles folder (for this particular tests it's ....\AppData\Local\Mozilla\Firefox\Profiles\6m0mef0s.default for deployment, all i have to do is: 1) Install the same version (offline installer) of the Firefox i used.. 2) overwrite the contents of the new profiles folder (randomly named by Firefox installer as usual) .. This should set all my configs and addons right? or what other folders do i have to backup and copy manually into the new profiles folder? I don't think i need to tinker w/ any registries right? anyway, if this works, though it's a bit manual, it's a whole lot simplier, and straight forward than fiddling w/ Installers and Packages etc.. PS I do this a lot w/ other simple (and some complex) software that i use and they seem to work fine for years.. i'm just not sure with firefox and how it's structured..

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• Any chance to extract Windows from recovery DVDs

  - by Pekka

  I have an Acer Tablet PC that came with WIndows XP Tablet PC Edition in the form of three recovery DVDs. Sadly, a mainboard fault put the machine out of business. I have now bought a used one from a different manufacturer that comes without an operating system. The recovery DVDs seem to contain three parts of a Norton Ghost image, and nothing else. The recovery DVD won't even start on a Non-Acer system. I'm a bit miffed because I legally own a Windows XP Tablet PC Edition license that I now can't use on the original machine any more. As far as I know, it's not legal in my jurisdiction for them to bind the license to a certain machine. I want to continue using the operating system on the new machine. Is there any chance of extracting usable Windows XP installation files from that image? How are such image files usually made up? Is there any free software around that can read Norton Ghost images so I can take a peek myself?

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• How to configure TFTPD32 to ignore non PXE DHCP requests?

  - by Ingmar Hupp

  I want to give our Windows guy a way of easily PXE booting machines for deployment by plugging his laptop into one of our site networks. I've set up a TFTPD32 configuration which does just that, and our normal DHCP server ignores the PXE DHCP requests due to them having some magic flag, so this part works as desired. However I'm not sure how to configure TFTPD32 to only respond to PXE DHCP requests (the ones with the magic flag) and ignore all normal DHCP requests (so that the production machines don't get a non-routed address from the PXE server). How do I configured TFTPD32 to ignore these non-PXE DHCP requests? Or if it can't, is there another equally easy to use piece of software that he can run on his Windows laptop? Since the TFTPD part is working fine, a DHCP server with the ability to serve PXE only would do. Worst case I'll have to set up a virtual machine with all this, but I'd much prefer a small, simple solution. I'm not interested in solutions that involve using the existing DHCP servers or separating machines on the network for deployment, the whole point is to be simple and stand-alone.

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• apache-user & root access

  - by ahmedshaikhm

  I want to develop few scripts in php that will invoke following commands; using exec() function service network restart crontab -u root /xyz/abc/fjs/crontab etc. The issue is that Apache executes script as apache user (I am on CentOS 5), regardless of adding apache into wheel or doing good, the bad and the ugly group assignment does not run commands (as mentioned above). Following are my configurations; My /etc/sudoers root ALL=(ALL) ALL apache ALL=(ALL) NOPASSWD: ALL %wheel ALL=(ALL) ALL %wheel ALL=(ALL) NOPASSWD: ALL As I've tried couple of combination with sudoer & httpd.conf, the recent httpd.conf look something as follows; my httpd.conf User apache Group wheel my PHP script exec("service network start", $a); print_r($a); exec("sudo -u root service network start", $a); print_r($a); Output Array ( [0] => Bringing up loopback interface: [FAILED] [1] => Bringing up interface eth0: [FAILED] [2] => Bringing up interface eth0_1: [FAILED] [3] => Bringing up interface eth1: [FAILED] ) Array ( [0] => Bringing up loopback interface: [FAILED] [1] => Bringing up interface eth0: [FAILED] [2] => Bringing up interface eth0_1: [FAILED] [3] => Bringing up interface eth1: [FAILED] ) Without any surprise, when I invoke restart network services via ssh, using similar user like apache, the command successfully executes. Its all about accessing such commands via HTTP Protocol. I am sure cPanel/Plesk kind of software do use something like sudoer or something and what I am trying to do is basically possible. But I need your help to understand which piece I am missing? Thanks a lot!

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• unable to ping hostname, but \\hostname\\c$ works!?

  - by ciscokid

  I'm having a strange issue on my initial lab setup. Situation: Host with OS Server 2008 R2 64bit, on this host a Virtual Machine in Hyper-V with OS Server 2008 SP1 32bit. The virtual machine has a fixed ip, and is referring to itself for the preferred DNS Server (dns server role has been installed). The host has tcp/ip set to automatic (so automatic ip from router, and dns/gateway = router). Both are able to ping each other on IP address (same ip range). Both are NOT able to ping each other on hostname (sounds logic because virtual machine dns server does not yet have a dns record for the hostmachine). But here's the strange thing: I am able to set up a working network mapping on the Virtual Machine to the host: \hostname\c$. The first thing I thougt was 'something' is blocking the ping request, so I completely disabled Windows Firewall on both Virtual Machine and host. Still pinging on hostname in both ways didn't work, yet I am able to access the network mapping on hostname. There is no extra software installed on both systems (clean windows server 2008).Can someone tell me what is causing this? I always thought: ping on IP address works = network mapping on IP address works. Pinging on hostname doesn't work = network mapping on hostname doesn't work neither. Where am I wrong? Looking forward to your advice!

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• Mac OS X Client With Static DHCP Assignment Requests Wrong IP via Option 50

  - by Starchy

  I have a number of Mac (and a few Linux) laptops getting DHCP from a Force10 layer 3 switch, the only DHCP server on the subnet. There's a global dynamic pool, and for each full-time employee's laptop I have a single IP static pool set by MAC address. One and only one of the clients, running OS X 10.7.5, consistently fails to get a static assignment. The MAC address in the static pool definition has been carefully re-checked. Running tcpdump on a mirrored port when the laptop connects, I see that it is specifically requesting 10.100.0.252 (a dynamic address): 11:32:10.108280 IP (tos 0x0, ttl 255, id 28293, offset 0, flags [none], proto UDP (17), length 328) 0.0.0.0.bootpc > broadcasthost.bootps: [udp sum ok] BOOTP/DHCP, Request from 3c:07:54:xx:xx:xx (oui Unknown), length 300, xid 0x1399da89, Flags [none] (0x0000) Client-Ethernet-Address 3c:07:54:xx:xx:xx (oui Unknown) Vendor-rfc1048 Extensions Magic Cookie 0x63825363 DHCP-Message Option 53, length 1: Request Parameter-Request Option 55, length 9: Subnet-Mask, Default-Gateway, Domain-Name-Server, Domain-Name Option 119, LDAP, Option 252, Netbios-Name-Server Netbios-Node MSZ Option 57, length 2: 1500 Client-ID Option 61, length 7: ether 3c:07:54:xx:xx:xx Requested-IP Option 50, length 4: 10.100.0.252 Lease-Time Option 51, length 4: 7776000 Hostname Option 12, length 10: "host-name" END Option 255, length 0 PAD Option 0, length 0, occurs 8 I haven't been able to find any extra system prefs or unusual software on the laptop. Disabling the interface and rebooting or temporarily setting the IP manually both fail to make any difference. Any suggestions appreciated.

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• Windows Media Sharing not 'always' being detected by PS3

  - by Ahmad

  I'm having a weird problem with Windows Media Sharing on Windows 7 .. I have the following hardware in my network: PC 1 --- My main PC --- runs Windows 7 Ultimate x64 PC 2 --- My backup PC --- runs Windows 7 Ultimate x32 PS3 PC 1 is my main PC which has all my data/media on it .. PC 2 is a backup PC I have, but I use it like once in 2 months .. It has nothing installed on it apart from some very very basic software ... Problem is, my PS3 always sees the media sharing service coming from PC 2, but it never sees the media sharing service coming from PC 1 initially .. Both PC 1 and PC 2 have the same media sharing configuration (All everything on all devices on all networks) ... But when I restart both PCs, the PS3 will only detect PC 2's media sharing service, not PC1 .... However here's the twist .. When PC 1 is restarted, and if I view my 'Network' on PC 2, I do see PC 1's Media Sharing Service, and I'm able to play from it too on PC 2 .. To get my PS3 to also see PC 1's media sharing service, I have to do either of the following 2 things: 1) Play something from PC 1's media sharing service on PC 2 ... The PS3 will then magically also detect PC 1's media sharing service .. 2) Go into the Services area on PC 1 and restart the 'Windows Media Player Network Sharing Service' ... After this, the PS3 also instantly starts to see PC 1's media sharing service .. Since my PS3 is like a month old and is properly detecting PC 1's media sharing service, I think the problem is somewhere in the configuration of PC 1's media sharing service ... Also, on PC 1 I have Norton Internet Security 2012 installed, but I've disabled it completely, and have also disabled Windows Firewall (from PC 1 only) .. Can someone shed some light onto this ?

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• Iptables - Redirect outbound traffic on a port to inbound traffic on 127.0.0.1

  - by GoldenNewby

  I will be awarding a +100 bounty to the correct answer once it is available in 48 hours Is there a way to redirect traffic set to go out of the server to another IP, back to the server on localhost (preferably as if it was coming from the original destination)? I'd basically like to be able to set up my own software that listens on say, port 80, and receives traffic that was sent to say, 1.2.3.4. So as an example with some code. Here would be the server: my $server = IO::Socket::INET->new( LocalAddr => '127.0.0.1', LocalPort => '80', Listen => 128, ); And that would receive traffic from the following client: my $client = IO::Socket::INET->new( PeerAddr => 'google.com', PeerPort => '80', ) So rather than having the client be connecting to google.com, it would be connecting to the server I have listening on localhost for that same server. My intention is to use this to catch malware connecting to remote hosts. I don't specifically need the traffic to be redirected to 127.0.0.1, but it needs to be redirected to an IP the same machine can listen to. Edit: I've tried the following, and it doesn't work-- echo 1 > /proc/sys/net/ipv4/ip_forward iptables -t nat -A PREROUTING -p tcp --dport 80 -j DNAT --to-destination 127.0.0.1:80 iptables -t nat -A POSTROUTING -j MASQUERADE

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• Data recovery on a corrupted 3TB disk

  - by Mark K Cowan

  Short version I probably need software to run a deep-scan recovery (ideally on Linux) to find files on NTFS filesystem. The file data is intact, but the references are no longer present. Analogous to recovering data from a "quick-formatted" partition. Hopefully there is a smarter way available than deep-scan, one which would recover filenames and possibly paths. Long version I have a 3TB disk containing a load of backups. Windows 7 SP1 refused to detect the disk when plugged in directly via SATA, so I put it on a USB/SATA adaptor which seemed to work at first. The SATA/USB adaptor probably does not support disks over 2.2TB though. Windows first asked me if I wanted to 'format' the disk, then later showed me most of the contents but some folder were inaccessible. I stupidly decided to run a CHKDSK on my backup disk, which made the folders accessible but also left them empty. I connected this disk via SATA to my main PC (Arch Linux). I tried: testdisk ntfsundelete ntfsfix --no-action (to look for diagnostically relevant faults, disk was "OK" though) to no avail as the files references in the tables had presumably been zeroed out by CHKDSK, rather than using a typical journal'd deletion). If it is useful at all, a majority of the files that I want to recover are JPEG, Photoshop PSD, and MPEG-3/MPEG-4/AVI/MKV files. If worst comes to worst, I'll just design my own sector scanner and use some simple heuristic-driven analysis to recover raw binary blocks of data from the disk which appears to match the structures of the above file types. I am unfamiliar with the exact workings of NTFS but used to be proficient at recovering FAT32 systems with just a hex-editor, so I can provide any useful diagnostic information if you let me know how to find it! My priorities in ascending order of importance for choosing the accepted answer: Restores directory structure Recovers many filenames in addition to the file data Is free / very cheap Runs on Linux Recovers a majority of file data The last point is the most important, but the more of the higher points you match the more rep you'll probably get :)

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• How small (spec wise) can a virtual machine be and still boot up and run some sort of OS?

  - by IllvilJa

  One of the advantages with virtual machines is that you can be very flexible with their sizes. If the host system permits it, you can have a very large virtual machine with a lot of virtual RAM and disk. Also, you can decide to go the other way around, to give the virtual machine a very modest amount of RAM and disk and then choose and configure the OS appropriately. The question is, how small virtual machines have people managed to setup (and get to both boot up and to run)? Virtual machines doing something usuful is preferable, even if I know "useful" in this context is awfully subjective, but laboratory-cases with a configuration stripped beyond common sense could be intresting as well, just to see what people manage to boot and run. Quite open ended question and quite academic, but think of it: an extremely small VM (which still does something useful) takes very little memory and disk and can be quite quickly saved to and restored from disk. If it's also gentle on CPU resources, one might consider having a huge number of such VMs up and running on a host. (Imagine a VM running just an old Commodore 64 or Commodore Amiga in it. Ok, way wrong CPU architecture for modern Virtualization software running on a x86-based PC but still an interesting thought. You could have quite a few such small VMs running on a modern PC.)

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• What to do before connecting Ubuntu Server to the internet for the first time?

  - by CodeMonkey

  I just finished installing Ubuntu Server 12.10 on an Asus Eee PC 1000H (to be used as a home server/sandbox) from USB. I installed this software during installation: OpenSSH server LAMP server Samba file server Virtual Machine host I won't use 2, 3 or 4 for a while though. Can/should I turn these off somehow? I have turned home directory encryption on. Security updates are installed automatically. I have chosen a strong password for the single user. I have never plugged in the internet cable so far. Before doing so I'd like to ask: What can/should I do/install to increase security before connecting to the internet? Firewall? Fail2ban? Users/Passwords? Encryption? Enable/Disable functionality? etc. I'm sorry if you get this question a lot. I've searched around quite a while, but it still feels like I might overlook something important.

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• Prevent Network Printers Automatically being added to 'Devices and Printers' in Windows 7

  - by Ben

  I think my question is a duplicate of this one, but the original question was never properly answered (the steps described are for Windows XP). I am aware of the option to "Turn off Network Discovery" (under Control Panel All Control Panel Items Network and Sharing Center Advanced sharing settings); I set this option (for both Home/Work and Private) but it doesn't seem to stop the printers getting added, and has the side effect of preventing me from browsing the list of machines on the network (which I need). I've tried the Windows XP registry option - but it doesn't seem to make any difference: HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\NoNetCrawling I find it annoying having the printer list cluttered with printers from all over the office which I am never going to use (especially since lots of them no longer physically exist, users just haven't deleted them from their machines). This must be a real problem for people in massive offices with large numbers of printers - but I can't seem to find a lot of people complaining about it - which makes me think I'm missing something obvious. I don't really want to hack the firewall or turn off sharing completely, I still want to select and use network printers and file shares. Any ideas?

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• How to generate thumbnails for less common video containers (mkv, ogm, mp4, flv, rmvb and mov) in wi

  - by fluxtendu

  So how to generate thumbnails for these containers? I know that the install of "DivX Plus Tech Preview: MKV on Windows 7" does it for MKV. But I think that only some registry changes are really necessary and I want it for other containers. If it's possible to avoiding the install of (always bloated) codecs packs it would be nice... Maybe only installing ffdshow or essential and separated codecs. (some time ago I have try reg files for vista without success...) Update: I have installed Win7codecs & tweaked a little its settings and I got almost everything I want. (I have also re-installed the relevant part of the divx plus tech preview to get something else than an all black preview for MKV) Issues that I still want to resolve: Find a cleaner & lighter method Almost all my rmvb and mov files got an all black preview (installing real media/quick time alternative doesn't help, is it the same with the officials?) With almost all containers (avi, mkv, ogm, mpg), I have (few) random files that don't get the preview. I could play them in WMP or another player and don't have found a pattern in the codecs used. All wmv, flv and mp4 have previews but I have less files in these containers. (I clear my thumbnails cache to test them) More generally I would like to understand how windows handle the containers & codecs to generate the previews. And a software that let me choose arbitrarily the pictures previewed would be convenient too

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• Spurious alleged file corruption on Windows 7

  - by Johannes Rössel

  Recently my Laptop sometimes warns about corrupted files on the hard drive (Samsung SSD PB22-JS3 TM). This has only happened so far when updating (or checking out) an SVN repository with either TortoiseSVN or the command line Subversion client. The fun thing is that the corrupted file has always been a .svn directory (although the directory entry may contain files in that directory too, if they're small enough?—?which should be the case with SVN). However, when looking into the warned-about directory I notice nothing strange or unusual and don't get any more warnings about it and another try (SVN stops updating once that error occurs?—?TortoiseSVN even with an appropriate error message) of updating the working copy works (well, mostly; sometimes it does it again, albeit with a different directory). Since the laptop is only a few months old I doubt the SSD is failing already—five months of normal usage shouldn't be too surprising. Also it (so far) occurred only with SVN updates on a large repository. Maybe that's too many writes in a short time and some part between the software and the hardware doesn't quite catch up fast enough or so?—?I don't know enough about this to actually make an informed guess here. Anyone knows what's up here? ETA: Note to add: I've run chkdsk (it seems to schedule itself anyway when this happens) and it didn't find anything out of the ordinary.

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• Windows 7 - Windows XP - sharing - why isn't working?

  - by durumdara

  Hi! This is seems to be "hardware" and not "software" / "programming" question, but I need to use this share in my programs, so it is "close to programming". We had an XP based wireless network. The server is XP Professional, the clients are XP Home (Notebooks). This was working well with folder sharing (with user rights, not simple share). Then we replaced the one of the notebook with Win7/X64 notebook. First time this can reach the server, and the another client too. Later I went to another sites, and connect to another servers, another networks. And then, when I return to this network, I saw that I cannot connect to this server. Nothing of resources I see, and when try to dbl click on this computer, I got login window, where I can write anything, never I can login... The interesting part, that: Another XP home can see the server, can login as quest, or with other user. The server can see the XP home notebook. The Win7 can see the notebook's shared folders, and XP home can see the Win7 shared folders. The server can see the Win7 folders, BUT: the Win7 cannot see the server folders. Cannot see the resources too... The Win7 is in "work networking group", the group name is not mshome. I tried everything on the server, I tried to remove MS client, restore it with simple sharing, set guest password, etc., but I lost the possibilities to access this server from Win7. Does anyone have any idea what I need to see, what I need to set to access these resource - to use them in my programs? Thanks for every info, link: dd

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