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• What does "cpuid level" means ? Asking just for curiosity

  - by ogzylz

  For example, I put just 2 core info of a 16 core machine. What does "cpuid level : 6" line means? If u can provide info about lines "bogomips : 5992.10" and "clflush size : 64" I will be appreciated ------------- processor : 0 vendor_id : GenuineIntel cpu family : 15 model : 6 model name : Intel(R) Xeon(TM) CPU 3.00GHz stepping : 8 cpu MHz : 2992.689 cache size : 4096 KB physical id : 0 siblings : 4 core id : 0 cpu cores : 2 fpu : yes fpu_exception : yes cpuid level : 6 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm constant_tsc pni monitor ds_cpl vmx cid cx16 xtpr lahf_lm bogomips : 5992.10 clflush size : 64 cache_alignment : 128 address sizes : 40 bits physical, 48 bits virtual power management: processor : 1 vendor_id : GenuineIntel cpu family : 15 model : 6 model name : Intel(R) Xeon(TM) CPU 3.00GHz stepping : 8 cpu MHz : 2992.689 cache size : 4096 KB physical id : 1 siblings : 4 core id : 0 cpu cores : 2 fpu : yes fpu_exception : yes cpuid level : 6 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm constant_tsc pni monitor ds_cpl vmx cid cx16 xtpr lahf_lm bogomips : 5985.23 clflush size : 64 cache_alignment : 128 address sizes : 40 bits physical, 48 bits virtual power management:

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• Installing xampp on system that already have mysql

  - by Charith

  I'm rather new to PHP and xampp. I have a computer that has installed MySQL server and MySQL workbench as I was working with Java and NetBeans. Now I want to use my computer for developing PHP and other web stuff too. I installed xampp successfully. But when I'm trying to access phpMyAdmin, it gives me an error saying mysql server rejected its connection Actually I tried stopping my current MySQL service and installing it again. However xampp have a its own mysql server in its installation path too. I tried configuring config.inc.php to use my existing installation of MySQL which is on a separate path. But I failed. Can anyone please instruct me how to configure this xampp to use my existing MySQL server to do everything and ignore the installed one with itself? I don't want two MySQL services to run on my system and clash in future. I'll be glad if anyone can explain to me what is best to use when you're developing Java, PHP, C and all the stuff on the same machine. P.S.: I have been given a password for my existing MySQL sever (user = root) as we do it usually when installing MySQL alone.

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• How to choose the most optimal RAID settings on PE2950

  - by javano

  I have some Dell PowerEdge 2950's with 4x 15k, 150GB Cheetah SAS drives in them. They are going to be VM hosts, CentOS running ESXi with Windows Server 2k8 guests. Some guests will be hosting IIS servers, and others MSSQL servers. I am trying to set the RAID virtual disks settings and can't decide which is more optimal given this situation; Read Policy: Out of Read-Ahead, No-Read-Ahead and Adaptive Read-Ahead, the default is Read-Ahead. I will be making large sequential writes initially, writing out blank images for virtual machine hard drives (lets say 30GBs from /dev/zero for example) so Read-Ahead seems good at first. But within the virtual machines reads could be random from anywhere within their file systems as they are IIS and MSSQL servers, so perhaps No-Read-Ahead is a better idea? Now I think Adaptive Read-Ahead would be better then as a compromise but I don't know much about this option, how does it compare in performance to the others? Write Policy: write-back caching, write-through caching, the default is write-back caching. The default of write-back caching is safer than write-through caching but at a performance expense. My thinking here is that in the event of power loss for example, it seems more likely in my head (this is why I need some clarification!) that damage will occur to a guest VM with write-back caching enabled, so I should favour write-through? I have searched around and there is obviously no definitive answer, so I would like to find out what is best for my situation.

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• Transparent proxying in MacOS X 10.6 Snow Leopard (and maybe FreeBSD)

  - by apenwarr

  I'm trying to create a transparent proxy on my MacOS machine in order to port the sshuttle ssh-based transproxy VPN from Linux. I think I almost have it working, but sadly, almost is not 100%. Short version is this. In one window, start something that listens on port 12300: $ while :; do nc -l 12300; done Now enable proxying: # sysctl -w net.inet.ip.forwarding=1 # sysctl -w net.inet.ip.fw.enable=1 # ipfw add 1000 fwd 127.0.0.1,12300 log tcp from any to any And now test it out: $ telnet localhost 9999 # any port number will do # this works; type stuff and you'll see it in the nc window $ telnet google.com 80 # any host/port will do # this *doesn't* work! After the latter experiment, I see lines like this in netstat: $ netstat -tn | grep ^tcp4 tcp4 0 0 66.249.91.104.80 192.168.1.130.61072 SYN_RCVD tcp4 0 0 192.168.1.130.61072 66.249.91.104.80 SYN_SENT The second socket belongs to my telnet program; the first is more suspicious. SYN_RCVD implies that my SYN packet was correctly captured by the firewall and taken in by the kernel, but apparently the SYNACK was never sent back to telnet, because it's still in SYN_SENT. On the other hand, if I kill the nc server, I get this: $ telnet google.com 80 Trying 66.249.81.104... telnet: connect to address 66.249.81.104: Connection refused telnet: Unable to connect to remote host ...which is as expected: my proxy server isn't running, so ipfw redirects my connection to port 12300, which has nobody listening on it, ie. connection refused. My uname says this: $ uname -a Darwin mean.local 10.2.0 Darwin Kernel Version 10.2.0: Tue Nov 3 10:37:10 PST 2009; root:xnu-1486.2.11~1/RELEASE_I386 i386 Does anybody see any different results? (I'm especially interested in Snow Leopard vs Leopard results, as there seem to be some internet rumours that transproxy is broken in Snow Leopard version) Any advice for how to fix?

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• Adding gcc 4.9 as a compiler option in Xcode

  - by user2129150

  I asked this question on StackOverflow, but it's pretty much stagnant. Sorry if this is considered a repost/double-post. I just installed gcc 4.9 (with C11 support), and want to add it to Xcode 4.6.3's build options as a compiler option. I ran make and make install, and the packages are all there (under /usr/bin/gcc. Running gcc --version confirms that gcc 4.9 is installed rather than an older version. When I go into an existing Xcode project's build settings, the only compiler options available are Apple LLVM compiler 4.2 LLVM GCC 4.2 Other... Clearly, GCC 4.9 would have to be added using the "Other..." option, although I'm not sure how. I've tried inputting the path to gcc (/usr/bin/gcc), although the default value for other isn't a path at all: com.apple.compilers.llvmgcc42. I've also tried following the instructions from the answer to this question as well, but the machine I'm on doesn't have the /Developer directory at all, since I believe Apple integrated the developer tools that required (and created) this directory into Xcode. How do I add gcc 4.9 as a compiler option in Xcode?

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• BackupExec 12 + RALUS - VERY slow backups

  - by LVDave

  We use Backup Exec 12 and the Remote Agent for Linux/Unix Servers (RALUS) to backup a large RHEL5 system. For various reasons we need to do a daily working set job. These working-set jobs run abysmally slow. The link between the target machine and the BE server is gigabit, and any other type of job runs 1-3GB/min. These working-set jobs start out at perhaps 40MB/min and over the course of the backup job slowly drops down so low that the BE job rate display in the "current jobs" goes blank.. Since we usually are only doing changed-files for one day, the job is usually small and finishes overnight and we don't worry abotu the slowness, but we had some issues with the backup server, and missed about 6 days of fairly heavy work on the Linux box, so this working-set job will be a doozy.. We have support with Symantec, and I've pestered them a lot about this, they've had me run RALUS in debug mode, sent them that log and a VXgather from the BE host and they had no fix/workaround.. To give an idea, I have the mentioned working-set job running for the last 3 1/2 hours and it's backed up just under 10MEGAbytes.... I'm posting this here to see if anybody in the "real world" has seen this/and/or has any ideas what might be causing these abysmally slow jobs, since Symantec seems to be clueless...

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• Best way to integrate applications to windows 7 install.wim image

  - by cyph3r

  I have right now an unmodified .iso of a windows 7 32bit and 64bit installation disk. And I need to integrate to that some applications (office, adobe reader etc) and windows updates so that when windows are installed the above applications/updates are already installed and working. Requirements: My output has to be a install.wim image containing the new/improved windows installation files because the deployment is done via a pxe server and a custom windowsPE enviroment. The procedure to create the install.wim has to be as automatic as possible. I can't create it manually every time I want to incorporate a new windows or application update to the image. The image will be installed on 100+ computers so it needs to be 'generic'. I've never done something like this before but from what I searched a possible solution to this issue would be: To create a reference installation (preferably on a vm so I can take snapshots) complete with its applications/updates/settings. After the complete setup I take a snapshot of the installation Run C:\Windows\System32\sysprep\sysprep.exe /oobe /generalize /shutdown to sysprep the machine. Boot to a WindowsPE enviroment and capture the .wim image using gimagex. Deploy the .wim and enjoy the rapid installation times. :D Does that sound ok? Would you recommend anything else? Right now the applications are installed after the installation of windows is complete. So the total installation time is quite long. That's why I need a different approach.

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• Can not access SQLServer database

  - by btrey

  I'm trying to convert an Access database to use a SQLServer backend. I've upsized the database and everything works on the server, but I'm unable to access it remotely. I'm running SQLServer Express 2005 on Windows Server 2003. The server is not configured as a domain controller, nor connected to a domain. The computers I'm trying to access the server from are part of a domain, but there are no local domain controllers. I'm at a remote location and the computers are configured and connected to the domain at the home office, then shipped to us. We normally log in with cached credentials and VPN into the home office when we need to access the domain. I can use Remote Desktop Connection to access the 2k3 server which is running SQLServer. If I log into the server with my username, I can bring up the database, access it via the Trusted Connection, and the database works. If I try to run the database locally, however, I get the Server Login dialog box. I can not use a Trusted Connection because my local login is to the home office domain and is not recognized by the SQLServer machine. If I try to use the username/password that is local to the SQLServer, I get a login failed error. I've tried entering the username as "username", "workgroup/username" (where "workgroup" is the name of the workgroup on the SQLServer), "sqlservername/username" and "[email protected]" where "1.2.3.4" is the IP of the SQLServer. In all cases, I get a login failed error. As I said, I can login to the server via Remote Desktop Connection with the same username and password and use the database, so permissions for the username appear to be correct for both a remote connection and for database access. Not sure where to go from here and any assistance would be appreciated.

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• Can I recover a rm -rf-ed Mercurial repository?

  - by WishCow

  I made the mistake of wiping out my entire project directory with a quick "rm -rf project". Of course, the .hg directory went with it. I had about 15-20 changesets, that I have not pushed to anyone, and I would really really like to get those back. The system is a Ubuntu machine, and the partiton where the delete happened is ext3, the project consist mostly of PHP files. I know about the guideline to not write to the disk in question. The first idea was to use the tool named scalpel, to get the PHP files back and diff them with the current version from the repo, and somehow carve the changes out. While it succeeded, it did not recover the file names (or there is a switch I'm missing), so I'm left with a few thousand sequentially named .php files, combing through them is not an option. Can a kind soul please save me, and suggest a way to: a) get the repo back, or b) get the files back, with filenames For those wondering how I did such a stupid thing: I was working on a file in Vim which I wanted to remove from the repository: :!hg rm % This complained that the file is in a subrepository, so I specified the following: :!hg rm % -R engine which complained that file has modifications, use -f to force. And this is when somehow, I made up the following command: :!rm -rf % -R engine Somehow, seeing "force" makes me do a rm -rf by reflex.

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• computer build for extreme tabbed browsing

  - by David Berger

  I'm interested in building or buying a task-specific computer for my brother. His requirements are ridiculously simple: the machine has to be able to wait in hundreds of web-based virtual waiting rooms at once and not crash. To be competitive, he needs to be able to enter the waiting rooms an dauto-refresh them faster. My question is, what priority do I give the different specs? My initial surmise is this: Connection speed (nothing to do with my build, but I kind of think this will be more beneficial than anything I build for him) Memory size -- I don't usually see firefox taking up more than a gig, even when heavily tabbed, but I think one gig for the operating system and two gigs for the browser are necessary. Processor speed -- I think the processor will affect performance, but even something out of date will do what he needs Memory speed/RAM bus -- I doubt this will matter much, but it seems just on this side of irrelevant. Everything else is a non-issue for him. Does this seem to stack up correctly? Also, since he's looking to stay on the cheaper side, and I might end up recommending a refurb to him, is there anything particularly egregious that Vista would do if it came pre-installed? If I build it myself, I'll give him linux, but if I have it shipped to him, I'm not sure I could walk him through the install process for linux, but I probably could walk him through the process to upgrade to Windows 7, if it were somehow worth it.

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• Intermittent NFS lockups on Isilon cluster

  - by blackbox222

  We have an Isilon cluster with 8 IQ 12000x nodes which exports storage via several NFS shares for a handful of Linux and Solaris clients. There is a Linux system that has one of these NFS filesystems mounted. I/O to this filesystem is moderately heavy from the Linux system. Every 3-4 weeks (it's not on any kind of discernible schedule, and sometimes is more/less frequent than this), we notice that all activity ceases on this NFS mount (the process hangs, as if the network stopped working so process is stuck in uninterruptible sleep) - 30 minutes later, the share recovers and things continue to work normally. The kernel log from the affected machine is as follows: Dec 3 10:07:29 redacted kernel: [8710020.871993] nfs: server nfs-redacted not responding, still trying Dec 3 10:37:17 redacted kernel: [8711805.966130] nfs: server nfs-redacted OK relevant /etc/fstab line: nfs-redacted:/ifs/nfs/export_data/shared/...redacted... /data nfs defaults 0 0 I've checked to see if there are any scheduled processes e.g. cron jobs, Isilon related functions e.g. snapshots, etc that might be causing these hangups but I can't seem to find anything. I'm also not aware of any network related issues or maintenance that would cause this. All of the lockups last almost exactly 30 minutes per the kernel logs. Perhaps someone has some suggestions I could try? (I considered a soft mount to avoid the problems associated with processes accessing the filesystem hanging; however am wary of the corruption that could result and it would not really solve the underlying issue anyway).

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• Strange behaviour when creating/deleting subdomains

  - by Saif Bechan

  This can be a DNS cache issue from my local machine, but I am not sure. This is what happens. I have a domain that does not use wildcard subdomains, so they have to be created. Without creating the domain, and I point my browser to test.domain.com, I get a page server not found. Now when I create the subdomain, I keep getting the same problem. Now when I first create the domain, without ever visiting the page, I get the normal page, but now when I delete the subdomain, it never goes away. Can this be a DNS cache issue, I am working on a shared environment, maybe the router has a cache but I doubt that. Can this have something to do with my setup. I have tried to use the Google DNS hosting, but this gives me the same results. I have also tried some tools that clear my local DNS cache, they were some add-ons for FireFox. Anyone have any ideas what can be the problem. Are there any tests I can do to see if there is some kind of cache between me and the server.

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• Measure Total Bandwidth for Billing

  - by TonyZ

  I am setting up a new network which customers will host their applications on. It needs to be able to scale out to a few hundred servers and each server will have several VMs on it. Right now in my test environment, after the telco router, we are using a Linux router/firewall which is then connected to a Layer 2 switch. Could be a layer 3 in the future. I need to track total bandwidth per VM for each machine, and I need to do it in a way that it is not part of the VM. Each VM will have a private class ip address which is Natted by the gateway, or we may eventually run more than firewall/reverse proxy off a layer 3 switch. So my thinking is that I can do it off of a promiscuous port on the switches, or at the gateway firewall. I would like to have an out of the box solution, preferably open source. Does anyone have suggestions on the easiest way to set this up, and the easiest tool to use. I have looked at the web sites for Nagios, Zenoss, Zabbix, ntops on the firewall, etc. It is hard to ascertain just from the web sites if they do exactly this or not. Obviously, performance is also somewhat key here. Anything running on the gateway should not drag it down doing traffic accounting. Thanks for any thoughts. Tony Zakula

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• Why would one of my servers stop being able to access other servers by FQDN?

  - by Newlyn Erratt

  I have a number of servers on our local network and our debian server has suddenly stopped being able to access the other servers via their FQDN. Initial symptom was inability to login with Active Directory accounts. On further inspection, this machine, porkbelly, was unable to access our other servers (e.g. bacon and albert) via their FQDN. That is, they can ping albert by running ping albert but not by running ping albert.domain.local though when running ping albert it will be expanded to albert.domain.local. The server is still accessible from other servers via both porkbelly and porkbelly.domain.local. Upon examination of hosts information and running hostname its hostname and FQDN are correct. The resolv.conf appears correct. It contains: domain domain.local search domain.local nameserver 192.168.0.xxx (the nameserver) The dns server is also our Windows AD server. I'm not even sure where to go from here or why dns seems to be partially working though I don't have much experience. Where should I go from here? What might be causing this issue where machines are visible via their hostname but not their FQDN?

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• Multimaster Keepalived Configuration (Virtual IP with Load Balancing)

  - by Rad Akefirad

  Here are requirements: 1. High Availability 2. Load Balancing First configuration 1. Two linux servers have been configured with one static IP for each: 10.17.243.11, 10.17.243.12 2. Keepalived has been installed and configured with one VRRP instance to provide one virtual IP (10.17.243.10 as VIP, 10.17.243.11 as master and 10.17.243.12 as backup). 3. Everything works fine. The VIP is assigned to the master server (10.17.243.11) as long as it is up and running. As soon as it goes down, the VIP will be assigned to the backup server (10.17.243.12). 4. The problem here is all communication goes to the master server. Second configuration 1. I found active-active configuration for Keepalived which is possible by defining more than one VRRP instance. So that both server have two IPs (real 10.17.243.11 and virtual 10.17.243.10 for server #1 and real 10.17.243.12 and virtual 10.17.243.20 for server #2. 2. Everything works fine. we have two VIPs which are accessible (HA). But all communication coming to each IP still goes to one single machine (either server #1 or #2 depending on the IP). However I found some tricks on the DNS to overcome this limitation. But it's not acceptable in our case. Question: Is there any way to have one virtual IP which is assigned to both servers? By that I mean both servers are handling some part of workload (like the thing we do in web server load balancing)? By using either keepalived or some other tools? Thanks in advance.

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• Turn off monitor (energy saving) while in text console mode (in Linux)

  - by Denilson Sá

  How to configure Linux text console to automatically turn of the monitor after some time? And by "text console" I mean that thing that you get on ctrl+alt+F[1-6], which is what you get whenever X11 is not running. And, no, I'm not using any framebuffer console (it's a plain, good and old 80x25 text-mode). Many years ago, I was using Slackware Linux, and it used to boot up in text-mode. Then you would manually run startx after the login. Anyway, the main login "screen" was the plain text-mode console, and I remember that the monitor used to turn off (energy saving mode, indicated by a blinking LED) after some time. Now I'm using Gentoo, and I have a similar setup. The machine boots up in text-mode, and only rarely I need to run startx. I say this because this is mostly my personal Linux server, and there is no need to keep X11 running all the time. (which means: I don't want to use GDM/KDM or any other graphical login screen) But now, in this Gentoo text-mode console, the screen goes black after a while, but the monitor does not enter any energy-saving mode (the LED is always lit). Yes, I've waited long enough to verify this. Thus, my question is: how can I configure my current system to behave like the old one? In other words, how to make the text console trigger energy-saving mode of the monitor? (maybe I should (cross-)post this question to http://unix.stackexchange.com/ )

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• iperf max udp multicast performance peaking at 10Mbit/s?

  - by Tom Frey

  I'm trying to test UDP multicast throughput via iperf but it seems like it's not sending more than 10Mbit/s from my dev machine: C:\> iperf -c 224.0.166.111 -u -T 1 -t 100 -i 1 -b 1000000000 ------------------------------------------------------------ Client connecting to 224.0.166.111, UDP port 5001 Sending 1470 byte datagrams Setting multicast TTL to 1 UDP buffer size: 8.00 KByte (default) ------------------------------------------------------------ [156] local 192.168.1.99 port 49693 connected with 224.0.166.111 port 5001 [ ID] Interval Transfer Bandwidth [156] 0.0- 1.0 sec 1.22 MBytes 10.2 Mbits/sec [156] 1.0- 2.0 sec 1.14 MBytes 9.57 Mbits/sec [156] 2.0- 3.0 sec 1.14 MBytes 9.55 Mbits/sec [156] 3.0- 4.0 sec 1.14 MBytes 9.56 Mbits/sec [156] 4.0- 5.0 sec 1.14 MBytes 9.56 Mbits/sec [156] 5.0- 6.0 sec 1.15 MBytes 9.62 Mbits/sec [156] 6.0- 7.0 sec 1.14 MBytes 9.53 Mbits/sec When I run it on another server, I'm getting ~80Mbit/s which is quite a bit better but still not anywhere near the 1Gbps limits that I should be getting? C:\> iperf -c 224.0.166.111 -u -T 1 -t 100 -i 1 -b 1000000000 ------------------------------------------------------------ Client connecting to 224.0.166.111, UDP port 5001 Sending 1470 byte datagrams Setting multicast TTL to 1 UDP buffer size: 8.00 KByte (default) ------------------------------------------------------------ [180] local 10.0.101.102 port 51559 connected with 224.0.166.111 port 5001 [ ID] Interval Transfer Bandwidth [180] 0.0- 1.0 sec 8.60 MBytes 72.1 Mbits/sec [180] 1.0- 2.0 sec 8.73 MBytes 73.2 Mbits/sec [180] 2.0- 3.0 sec 8.76 MBytes 73.5 Mbits/sec [180] 3.0- 4.0 sec 9.58 MBytes 80.3 Mbits/sec [180] 4.0- 5.0 sec 9.95 MBytes 83.4 Mbits/sec [180] 5.0- 6.0 sec 10.5 MBytes 87.9 Mbits/sec [180] 6.0- 7.0 sec 10.9 MBytes 91.1 Mbits/sec [180] 7.0- 8.0 sec 11.2 MBytes 94.0 Mbits/sec Anybody has any idea why this is not achieving close to link limits (1Gbps)? Thanks, Tom

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• GRUB reporting wrong partition type

  - by plok

  It all started when I had to replace one of the disks that the software RAID 1 on this machine currently uses. From that moment on I have not been able to boot to the Windows XP that is installed on the fourth hard drive, /dev/sdd. I am almost positive that the problem is related not to Windows but to GRUB, as if I unplug all the other hard drives so that the Windows XP disk is now /dev/sda it boots with no problem. The problem seems to be that GRUB detects a wrong partition type, which I understand suggest that something is really messed up. This is what I get when I try to follow the steps that until now had worked like a charm: grub> map (hd0) (hd3) grub> map (hd3) (hd0) grub> root (hd3,0) Filesystem type is ext2fs, partition type 0xfd 0xfd? That doesn't make sense. /dev/sdb and sdc are 0xfd (Linux raid), but not /dev/sdd: edel:~# fdisk -l [...] Disk /dev/sdd: 250.0 GB, 250059350016 bytes 255 heads, 63 sectors/track, 30401 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0x00048d89 Device Boot Start End Blocks Id System /dev/sdd1 * 1 30400 244187968+ 7 HPFS/NTFS edel:/boot/grub# cat device.map (hd0) /dev/sda (hd1) /dev/sdb (hd2) /dev/sdc (hd3) /dev/sdd I have been trying to work this out for hours, to no avail. Can anyone point me in the right direction?

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• how would it be possible to discover a cable modem's MAC remotely?

  - by amateurenthusiast

  i was reading the back archives of a canadian privacy law blog, and he linked to a judicial decision. apparently as part of an investigation in which were used yahoo chat and google's old 'hello' image trading program the officer was able to determine a suspect's modem's MAC address: In order to determine who STEPHTOSH was, the officer did a trace on a programme called WHO IS in an effort to learn from where STEPHTOSH was coming. WHO IS is a command program available to the public. The officer was able to ascertain that the person using the name STEPHTOSH was a Rogers Internet customer. The officer was able to obtain the Internet Protocol address, also known as the I.P. There is only one location for an I.P., which is unique to that subscriber. By use of the website known as DNS STUFF.com, one is able to find with which company this I.P. is registered. It was ascertained that the I.P. address used by STEPHTOSH was registered to Rogers Cable, from the Toronto area. The officer also learned the Cable Modem MAC address used by STEPHTOSH. This was all the information the officer was able to amass. now it was my understanding that the MAC address of any given device can only be accessed if you're only one 'hop' away on the Internet. the suspect in question was in Markham and the officer part of the Toronto Police, so it's conceivable that they both might have used Rogers internet. but would that still put them only one 'hop' away from each other? i thought the first hop after the modem was usually the ISP? and if he'd used a netBIOS query against this guy's machine it would return the ethernet card's MAC, not the modem's. so is this guy on the same rogers subnet as the suspect's cable modem, is that functionality part of google's Hello (i could only think that it would be possible if Hello operated as a virtual LAN or something), does the officer have remote access to the arp caches of the routers at Rogers or is he just full of crap and lying to make his case stronger?

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• Ubuntu 64bit Xen DomU Issues after upgrade from Karmic to Lucid

  - by Shoaibi

  I was upgrading my servers today and it all went fine except the last machine which has the following issues: [Resolved using http://www.ndchost.com/wiki/server-administration/upgrade-ubuntu-pre-10.04#post-1004-upgradefinal-steps] No login prompt on console Done. Begin: Mounting root file system... ... Begin: Running /scripts/local-top ... Done. [ 0.545705] blkfront: xvda: barriers enabled [ 0.546949] xvda: xvda1 [ 0.549961] blkfront: xvde: barriers enabled [ 0.550619] xvde: xvde1 xvde2 Begin: Running /scripts/local-premount ... Done. [ 0.870385] kjournald starting. Commit interval 5 seconds [ 0.870449] EXT3-fs: mounted filesystem with ordered data mode. Begin: Running /scripts/local-bottom ... Done. Done. Begin: Running /scripts/init-bottom ... Done. Also tried by pressing ENTER and CTRL+C many times, no use. Resolved: [/tmp was mounted as noexec, changing that fix it]: I get errors when i try to re-install udev in single user mode: Unpacking replacement udev ... Processing triggers for ureadahead ... ureadahead will be reprofiled on next reboot Processing triggers for man-db ... Setting up udev (151-12.1) ... udev start/running, process 1003 Removing `local diversion of /sbin/udevadm to /sbin/udevadm.upgrade' update-initramfs: deferring update (trigger activated) Processing triggers for initramfs-tools ... update-initramfs: Generating /boot/initrd.img-2.6.32-25-server /usr/sbin/mkinitramfs: 329: /tmp/mkinitramfs_yuuTSc/scripts/local-premount/fixrtc: Permission denied /usr/sbin/mkinitramfs: 329: /tmp/mkinitramfs_yuuTSc/scripts/local-premount/ntfs_3g: Permission denied /usr/sbin/mkinitramfs: 329: /tmp/mkinitramfs_yuuTSc/scripts/local-premount/resume: Permission denied /usr/sbin/mkinitramfs: 329: /tmp/mkinitramfs_yuuTSc/scripts/nfs-top/udev: Permission denied /usr/sbin/mkinitramfs: 329: /tmp/mkinitramfs_yuuTSc/scripts/panic/console_setup: Permission denied /usr/sbin/mkinitramfs: 329: /tmp/mkinitramfs_yuuTSc/scripts/init-top/all_generic_ide: Permission denied /usr/sbin/mkinitramfs: 329: /tmp/mkinitramfs_yuuTSc/scripts/init-top/blacklist: Permission denied /usr/sbin/mkinitramfs: 329: /tmp/mkinitramfs_yuuTSc/scripts/init-top/udev: Permission denied /usr/sbin/mkinitramfs: 329: /tmp/mkinitramfs_yuuTSc/scripts/init-bottom/udev: Permission denied /usr/sbin/mkinitramfs: 329: /tmp/mkinitramfs_yuuTSc/scripts/local-bottom/ntfs_3g: Permission denied

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• Why does this preseed for gitolite fail?

  - by troutwine

  I'm installing gitolite on a Debian Squeeze box with the following preseed: gitolite gitolite/gituser string git gitolite gitolite/adminkey string ssh-rsa AAAAB3ECT gitolite gitolite/gitdir string /var/lib/git On installation: # debconf-set-selections /var/cache/debconf/gitolite.preseed # apt-get install gitolite Reading package lists... Done Building dependency tree Reading state information... Done Suggested packages: git-daemon-run gitweb The following NEW packages will be installed: gitolite 0 upgraded, 1 newly installed, 0 to remove and 26 not upgraded. Need to get 0 B/114 kB of archives. After this operation, 348 kB of additional disk space will be used. Preconfiguring packages ... Selecting previously deselected package gitolite. (Reading database ... 24715 files and directories currently installed.) Unpacking gitolite (from .../gitolite_1.5.4-2+squeeze1_all.deb) ... Setting up gitolite (1.5.4-2+squeeze1) ... adduser: The home dir must be an absolute path. dpkg: error processing gitolite (--configure): subprocess installed post-installation script returned error exit status 1 configured to not write apport reports Errors were encountered while processing: gitolite E: Sub-process /usr/bin/dpkg returned an error code (1) Why? The pre-seed was extracted from a manually configured installation, per here and exists without issue on another machine.

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• PC won't PXE boot to WDS/MDT with Dell Optiplex 755

  - by Moman10

  I am trying to set up a basic MDT solution. I have set one up in the past at a previous job and it worked flawlessly, however here I'm running into a problem and am having no luck getting around it. I've installed Windows Server 2012 and MDT 2013, along with adding on the WDS role. I haven't configured much outside of the defaults for WDS, basically just set PXE response to respond to all clients (and unchecked admin approval). This machine does not run a DHCP server. I looked on the DHCP scope of our DHCP server, it shows options 66/67 checked and the server name of the WDS server is in there as well. I didn't add this but I assume it was put on during the install process (I believe I had to manually make some adjustments at my old job for this). The PC I have is a Dell Optiplex 755. I have enabled the onbard NIC w/PXE boot option in BIOS and attempted to boot. I get a "TFTP...." error but nothing offering out a DHCP address like I'm used to. In my previous job it pretty much worked right out of the box. I've verified that PortFast is enabled on the port and I've tried a couple different PCs (but both are the same model, only model I have to work with). No matter what, I get the same error. The subnet the PC is in is a different subnet than where the WDS server is sitting, but there are IP helper statements on the switch and the PCs can get regular DHCP addresses just fine from the DHCP server, just doesn't seem to get offered out a PXE boot option. I don't know if the problem is a configuration with the server or the PC itself...but after a few days of Googling I'm running out of ideas. Does anyone have a good idea of something it may be?

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• How does it hurt to use Linux (Ubuntu) as a guest OS for all my tasks?

  - by sauparna

  I have a machine running Windows, where the disk has two partitions C (50 GB) and D (250GB). I do research in Information Retrieval and need to work with a large corpus (more than 50 GB) and in Linux. So if I want to install Linux on the existing system, keeping the Windows installation intact, will it be fine to run it in a virtual box? (say, QEMU, VMWare, etc.) An alternative is using Wubi. In that case the Linux installation has to be on drive C. Then, if I keep a small Linux installation (say 5GB) on C, and my corpus on D (mounted in Linux), how will it affect the performance of my programs which would be accessing the mounted Windows drive D. Is it feasible to use Linux this way? Which of the above is better if at all they are a way out? Note : Since my post in July 2010, I have been using and have tried several ways of maintaining a disk-image that I can mount in Linux. I had a 100GB qcow2 disk and a 100GB raw disk, both formatted to an EXT3 file system. I was mounting and connecting to the qcow2 disk using qemu-nbd. The problem was that every now and then, the connection to the disk would get lost and the running programs would throw disk I/O errors. The raw disk would mount and work fine as a loop mounted device, but when writing data to it, the mount.ntfs program would hog the CPU and the process would take an enormous amount of time. I was in fact running make on a piece of software located on this raw disk, and after a point of time make was waiting while mount.ntfs would show 100% CPU usage.

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• Diagnosing a BSOD involving USB

  - by David Ebbo

  [Running Win7 Ultimate 64 bit] My new HP Pavilion Elite HPE-450t has been plagued by BSDO crashes since I got it about 5 weeks ago. The crashes are somewhat rare, sometimes not occurring for 3 or 4 days. I have spent a lot of time trying to isolate the device that could be at fault, but I have seen crashes with only the keyboard and mouse plugged in (as USB devices), and I tried two sets of keyboard/mouse, so I'm running out of ideas. :( The WhoCrashed tool gave this info about my latest BSOD: crash dump file: C:\Windows\Minidump\121310-11887-01.dmp This was probably caused by the following module: usbport.sys (USBPORT+0x2DE4E) Bugcheck code: 0xFE (0x5, 0xFFFFFA8008F571A0, 0x80863B34, 0xFFFFFA80092F2510) Error: BUGCODE_USB_DRIVER file path: C:\Windows\system32\drivers\usbport.sys product: Microsoft® Windows® Operating System company: Microsoft Corporation description: USB 1.1 & 2.0 Port Driver Bug check description: This indicates that an error has occurred in a Universal Serial Bus (USB) driver. The crash took place in a standard Microsoft module. Your system configuration may be incorrect. Possibly this problem is caused by another driver on your system which cannot be identified at this time. I looked at http://msdn.microsoft.com/en-us/library/ff560407(VS.85).aspx, and for Parameter1 = 0x5, it says "A hardware failure has occurred due to a bad physical address found in a hardware data structure. This is not due to a driver bug". Should I conclude that it's a hardware issue in the machine itself, rather than a bad USB driver or USB device? Here is the MiniDump, in case someone can get more info out of it: http://ewt52q.blu.livefilestore.com/y1peS4Ce8nSK1SXghzMDoxDWXlaEu-EKCJsv25y8y5DXXIUzZ9U0_tYgFJXd939fykwa0zRmx98IW0PYG18GioqKAuARYjtspSA/121310-11887-01.dmp?download&psid=2

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• Apache multiple vhost logs, stored locally and sent to remote logstash

  - by benbradley

  I'm investigating centralised logging and it seems there's so many different ways this can be done. I don't want to run logstash as a log "sender", preferring to keep the web servers as lean and simple possible. So that means either using syslog, syslog-ng or the one I'm testing now, rsyslog. But I would like to have separate vhost log files on the web server, in addition to these logs being sent to a remote log collector. I've tested rsyslog using the imfile module to watch the Apache log files, but this means I have to hard-code each vhost log file into my rsyslog.conf. Not ideal as people will invariably forget when they add/remove sites on the server. The reason I'm using rsyslog's imfile is that Apache doesn't appear to let you log to file and syslog. And I want to keep vhost-specific log files on the web server. So how can I do this? Is there a way of having rsyslog produce local log files and forward the logs to a remote collector? I am prepared to change my Apache config to log to a single access/error log for all vhosts, so long as there are vhost-specific log files produced somewhere on the web server machine. I just don't want to lose any logging info if the remote log collector can't be contacted for any reason. Any comments/suggestions? Cheers, B

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