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• Windows security unknown accounts: security breach?

  - by Keikoku

  I was uploading some images I had just created to imgur earlier today and noticed that chrome couldn't access my Pictures folder. Windows tells me access was denied. Firefox didn't have an issue though I went to it through windows explorer and it worked fine, and looked at the security tab under properties and noticed that there were four unknown accounts, one of which has full control privileges. I looked at my other folders in the same drive and none of them had these unknown accounts. It was only that specific Pictures folder, and all of its subfolders. What are these unknown accounts and what could it mean? Should I be worried that someone may have compromised the system (well, I should probably be worried about that all the time I guess) I read on microsoft support forums that it may be the result of a previously deleted account, but there has only been one account on this computer for months and no user account management has been performed for awhile.

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• VMware networking - PortChannel or not?

  - by dunxd

  My ESX hosts each have 8 NICS. I have set up 2 NICs for our iSCSI SAN - each is connected to a different SAN switch. 2 NICs are set up for vMotion and Service Console - these are each connected to a different core switch (ports are trunked with VLANs dedicated to vMotion and Management) I now have four ports left over. Currently we have these set up each going into our default VLAN. Two NICs are connected to one core-switch and two are connected to the other. We decided to aggregate the connections to each switch - so they are teamed at the vswitch end, and port channelled at the physical switch end. I am now reading that port channelling these connections is not particularly useful, perhaps even over complicating things. Is there a particular problem with using port channels for VMware? What method provides the best balance between redundancy and performance?

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• Hyper-Threading and Dual-Core, What's the Difference?

  - by Josh Stodola

  In a conversation with the network administator, I mentioned that my machine was a dual-core. He told me it was not. I brought up the task manager, went to the perfomance tab, and showed him that there are two separate CPU usage graphs. I have a quad-core machine at home and it has four graphs. He told there were two graphs on this particular machine because of hyper-threading. I used to have a hyper-thread pentium 4 processor back in the day, but I never fully understood what it meant. So what is the difference between hyper threading and dual-core? And how do you tell which one you have?

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• What is the best way to clone Win7 machines?

  - by John Hoge

  I'm looking to buy 5 new Win7 boxes and would like to ease deployment by cloning the OS. What I would like to do is install a fresh OS (Dell doesn't seem to sell machines without preinstalled crapware anymore) and then install a few apps on the first one. Once it is just right, I want to clone the OS and install the image on the other four machines and just change the machine name. Is this possible to do without any extra third party software? What I am thinking of doing is backing up the disk image of the first machine to a network share, and then booting the others to the windows install DVD and restoring the same image on each machine. Has anyone had any luck with this technique?

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• How to re-add a missing font

  - by WEFX

  I recently upgraded from Office 2007 to 2010, and that went fairly smoothly. However, afterwards, my Calibri font was gone, so my Word and Outlook started using the next available font in the list... Comic Sans! I browsed to Control Panel Fonts, and saw that there was no longer a Calibri listing. I know that one way to recover a missing font is to just copy the missing font files from another computer. In my case, the four files I needed were: calibri.ttf, //regular calibrib.ttf, //bold calibrii.ttf, //italics calibriz.ttf, //bold and italics However, once I attempted to copy-and-paste these files to my computer, I realized these files were already on my problem computer; they never really got erased. I don't know why they aren't working in Office, and they aren't listed in Control Panel Fonts.

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• Vim snippets pop-up but don't complete

  - by raoulcousins

  I'm using spf13-vim in Fedora. When I try to use a snippet, I get options that pop up but when I don't know how to actually insert the snippet. For example, if I type for in a .cpp file, I get four options. I'm assuming I'm supposed to either hit tab or enter to insert them but neither works. I'm not even sure which vim plugin it is that the snippets come from (snipmate? neocomplcache?).Screenshot. The same problem happens in vim and gvim.

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• Throttle connections to web service if load gets too high?

  - by Joseph Turian

  I have a web site that communicates via XMLRPC with an XMLRPC server web service. (The web service is written in Python using xmlrpclib.) I believe that xmlrpclib will block while it is handling one request. So if there are three users with an xmlrpclib request ahead of you, your response takes four times as long. How do I handle it if I receive too many XMLRPC requests and the web service gets bogged down and has slow response time? If I am getting slashdotted, my preferred behavior is that the first users get good response times and everyone else is told to come back later. I think this is superior to giving everyone terrible response times. How do I create this behavior? Is this called load-balancing? I am not actually balancing though, until I have multiple servers.

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• Software RAID 10 on Linux

  - by vpetersson

  For a long time, I've been thinking about switching to RAID 10 on a few servers. Now that Ubuntu 10.04 LTS is live, it's time for an upgrade. The servers I'm using are HP Proliant ML115 (very good value). It has four internal 3.5" slots. I'm currently using one drive for the system and a RAID5 array (software) for the remaining three disks. The problem is that this creates a single-point-of-failure on the boot drive. Hence I'd like to switch to a RAID10 array, as it would give me both better I/O performance and more reliability. The problem is only that good controller cards that supports RAID10 (such as 3Ware) cost almost as much as the server itself. Moreover software-RAID10 does not seem to work very well with Grub. What is your advice? Should I just keep running RAID5? Have anyone been able to successfully install a software RAID10 without boot issues?

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• Print spooler consumes over 1GB of memory

  - by Stephen Jennings

  Suddenly, on a Windows Vista Business workstation I manage, the Windows print spooler service is consuming over 1GB of memory. I got the call this morning that the user could not print. I discovered all printers were missing from the Printers applet in Control Panel. I rebooted the machine, and at first the printers were still missing, but after a few minutes (and much banging my head against the wall) they suddenly appeared. I stopped worrying about it until later today it happened again to the same workstation. To my knowledge, nothing has changed on the computer. No new printers have been added, no new print drivers would have been installed, and no new software is being used. I tried clearing out the spooler folder (C:\Windows\System32\spooler\printers) which did have four print jobs from this morning, but the problem persists after restarting the spooler service. When starting the service, it starts out using 824 KB of memory, then after about 20 seconds it starts creeping up about 10MB each second until it stabilizes around 1.8GB.

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• How does NTFS compression affect performance?

  - by DragonLord

  I've heard that NTFS compression can reduce performance due to extra CPU usage, but I've read reports that it may actually increase performance because of reduced disk reads. How exactly does NTFS compression affect system performance? Notes: I'm running a laptop with a 5400 RPM hard drive, and many of the things I do on it are I/O bound. The processor is a AMD Phenom II with four cores running at 2.0 GHz. The system is defragmented regularly using UltraDefrag. The workload is mixed read-write, with reads occurring somewhat more often than writes. The files to be compressed include personal documents and selected programs, including several (less demanding) games and Visual Studio (which tends to be I/O bound more often than not).

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• Installing and maintaining an email server

  - by Andrew

  I need to move hosting providers for four or five domains and for several reasons I'm considering a Linux VPS rather than staying with my current shared, managed hosting provider. The only thing that's stopping me is email. I have lots of experience running and maintaining Apache, but none with email servers. Based on some research, if I want to keep what I've using now, it looks like I'd be going with Postfix and Dovecot, and probably Exim and SpamAssassin. I have no problem performing regular maintenance and watching for security updates, but I don't want to bite off more than I can chew. For someone new to email services, how hard is it to set up an email server that is externally accessible (via SMTP and POP3, not IMAP), available over SSL/TLS and reasonably reliable for multiple domains? How much of a time commitment is it to maintain one?

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• Not able to access a folder in Windows 7 and not able to see in Ubuntu.

  - by Rohit

  I have four partitions on my hard disk. Partition C has Windows XP installed and Partition G has Windows 7 installed. Ubuntu 10.10 is also installed, probably in F. Partitions C and G are NTFS. When I boot into C, XP is loading but when I click on the C Drive in MyComputer, it displays: "Access is denied". Windows 7 displays the folder tree of C, but when I try to open a folder, I am not able to view the contents. The same error: of Access Denied. When I try to view the C Partition using Ubuntu, the entire C partition is not visible. I tried following commands to take ownership of the C drive: takeown /f C: cacls C: /G Rohit:F but still I am not able to get rid of "Access Denied". I again tried the above commands from the Windows 7 safe mode, but still the problem persists. The two commands return "Successful", but nothing is happening.

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• Stop external USB keyboard repeating key presses on Vista.

  - by dommer

  We have an infuriating problem with a (Vista/Dell) laptop. When an external (Logitech) USB keyboard is attached to it, it regularly starts repeating key presses. When the user recently deleted an Outlook message, it deleted them all! When typing a message, suddenly it will start repeating the last keypress about 30 times (it varies). It's not a mechanical issue. We've switched the keyboard out four times. Even tried a brand new one one. Every time it's the same. Also, the keyboard works fine on other machines. The problem doesn't arise when the laptop's own keyboard is used - even if the external USB keyboard is still attached. I'm stumped? Any ideas. Not using an external keyboard isn't an option due to our health and safety policy (...don't ask...).

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• Only three primary partitions?

  - by ctype.h

  As everyone probably knows, Windows allows a drive to have four primary partitions, one of which may be active. However, I have only three primary partitions. I shrunk one and created a fourth partition so I could install Windows 8 on it, but Disk Management only allows it to be a logical partition. Why might this be the case? If I cannot convert it to a primary partition, is it advisable to install Windows on a logical partition? If so, is hibernation supported?

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• How can I get more pages with mod_rewrite

  - by wesszzel

  I use the mod_rewrite on my website, but some things arent working. I want four pages. Index Contact News Portfolio But all my links end up linking to Index! How do I change this? I use this code: <IfModule mod_rewrite.c> RewriteEngine On RewriteBase / RewriteRule ^index\.php$ - [L] RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule . /index.php [L] </IfModule> Thank you!!

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• Troubleshooting Windows Server 2012 storage spaces

  - by Iravanchi

  I'm trying the new "Storage Pools" feature on Windows Server 2012, and I've created several disks on the pool. When I restart the server, some of the disks (two, out of four) do not attach automatically, and don't show up in the list of disks. I can go to Server Manager File and Storage Services Storage Pools, and the faulty disks are listed with a yellow triangle beside them. The drive health in the properties are "unknown". But if I right-click and choose attach, the disk comes online, with all the content on it intact. But after another restart, it's the same story. I didn't find any relevant event in the event log, how can I find out why the drives are not attaching?

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• postgres memory allocation tuning 2

  - by pstanton

  i've got a Ubuntu Linux system with 12Gb memory most of which (at least 10Gb) can be allocated solely to postgres. the system also has a 6 disk 15k SCSI RAID 10 setup. The process i'm trying to optimise is twofold. firstly a single threaded, single connection will do many inserts into 2-4 tables linked by foreign key. secondly many different complex queries are run against the resulting data, using group by extensively. this part especially needs to be optimised. i have four of these processes running at once in order to make use of the quad core CPU, therefore there will generally be no more than 5 concurrent connections (1 spare for admin tasks). what configuration changes to the default Postgres config would you recommend? I'm looking for the optimum values for things like work_mem, shared_buffers etc. relevant doco thanks!

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• How to backup/restore OSX Parental Controls before/after complete reimage?

  - by Jim Anderson

  We typically "nuke and pave" users Mac OSX laptops if they have software issue. Prior to doing so, we backup the primary (non-admin) user's home folder. Our standard image has four accounts: Admin (uber admin user); Parent (admin account for the parents of students); Loaner (so our standard image will also work for our loaner laptop pool); Student (this is the primary, non-admin user of the laptop) Our standard image has only minimal Parental controls on the Loaner and Student accounts. Some parents choose to tighten the parental controls. We never know when parents have made changes to parental controls, or what those changes are. Once we have reimaged the machine with our standard image (minimal parental controls) we would like to be able to restore any custom parental controls parents may have placed on their student's account. Any help in this would be appreciated. Thanks.

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• Is mismatched firmware on drives in a raid-6 a bad thing?

  - by bwerks

  Hi all, I recently expanded a raid-1 to a raid-6 with six drives. I ordered all four of the new drives from the same place, and all of them were advertised to be the same drives as the original two--Seagate 15krpm 146gb. However, when I was looking at the drives in the perc6/i utility, one of them appeared to be an earlier firmware version; it had S515, compared to the other five drives with S527. Sure enough, after inspecting the drive itself, the label advertised the earlier firmware version. Running Dell's SAS firmware upgrade utility should have in theory moved them all up to S52A, but when I ran it it moved the S527 drives up to S52A, and left the S515 drive untouched. Is this something to be worried about? If it's something that should be corrected, is there a way to target a particular drive for upgrade since the firmware utility didn't seem to do it by itself?

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• 3.5mm headphone jack -> Component video?

  - by Isaac Waller

  Hello, I have a strange cord that has a male 3.5mm headphone jack on one side, and some component video and audio ouputs on the other. When I plug the headphone side into my computer, and the other side into my TV, I get audio across the cable, but no video. How can I send some video over the headphone jack in OS X? I know you can, because this cable is actually for a Beyblade toy and it somehow transferred video over this cable. Thanks, Isaac I think I found some more information (from Wikipedia:) "A four conductor version (of a 3.5mm headphone jack) is becoming a de facto standard output connector for compact camcorders, providing stereo sound plus a video signal." So how can I do this on Mac?

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• Installing Java on a Virtual Private Server

  - by Martin Rowe

  I have recently managed to get my employer to pay for a vps. I teach and asked the vps provider to enable Perl, Python, Ruby, Tomcat and Java. They've done the first four (really quickly) but have got back to me asking which parts of Java I need. I think the Java Virtual Machine is a given but what other S/W do I need to get installed? I think by getting the vps I now have the chance to teach Enterprise Java and want to get into Java Message Server and Enterprise patterns. Can I get Glassfish installed or is that a silly question? What about servlets and beans? Thanks in anticipation Martin Rowe

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• conditional formatting for subsequent rows or columns

  - by Trailokya Saikia

  I have data in a range of cells (say six columns and one hundred rows). The first four column contains data and the sixth column has a limiting value. For data in every row the limiting value is different. I have one hundred such rows. I am successfully using Conditional formatting (e.g. cells containing data less than limiting value in first five columns are made red) for 1st row. But how to copy this conditional formatting so that it is applicable for entire hundred rows with respective limiting values. I tried with format painter. But it retains the same source cell (here limiting value) for the purpose of conditional formatting in second and subsequent rows. So, now I am required to use conditional formatting for each row separately s

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• What linux permissions are need for www?

  - by Xeoncross

  I know that 777 is full read/write/execute permission for owner/group/other. So this doesn't seem to be needed as it leaves random users full permissions. What permissions are need to be used on /var/www so that... Source control like git or svn Normal users in a group like "websites" or added to "www-data" Servers like apache or lighthttpd And PHP/Perl/Ruby can all read, create, and run files there? If I'm correct, Ruby and PHP scripts are not "executed" directly - but passed to an interpreter. So there is no need for execute permission on files in /var/www. Therefore, it seems like the correct permission would be chmod -R 1660 which would make all files shareable by these four entities all files non-executable by mistake block everyone else from the directory entirely set the permission mode to "sticky" for all future files Is this correct? Update: I just realized that files and directories might need different permissions - I was talking about files above so i'm not sure what the directory permissions would need to be.

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• Create a CDROM Bootdisk to update BIOS

  - by osij2is

  So, I have a Tyan Opteron board with a very old BIOS version. I realize Opteron's aren't exactly common like Athlons, Phenoms, Intel CPUs, etc. but my question revolves around updating the BIOS, however I don't have a floppy drive and there's no option to boot off of a USB key. Tyan has incomplete instructions on their website (link) on how to flash the BIOS via USB. So my second tactic has been to create a Windows 98 boot-able CDROM with the flash utilities on it. It's been years since I've made one but after going to sites like bootdisk.com and such I haven't had any success. Can anyone tell me step-by-step how to make a boot-able Windows 98 CDROM? I can't believe I'm having such a hard time doing this but I've failed on four different attempts and I must be doing something wrong or I'm not accounting for something.

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• Why is Latex so big?

  - by putmatrix

  On windows, MikTex comes in a DVD. It's several times bigger than a typical Linux distribution. This makes it impossible to carry Latex on a memory stick like I do with many other useful software. Why is it so big? I thought it was just a language or system, but I've never seen any programming language with gigabytes of libraries. It's just that there's a bad feeling when your Latex distribution takes up four gigabytes of space when you expect it to be more of, say, 200mb.

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