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• VMware postfix server drops connection

  - by nicoX

  Our physical server godzilla forwards mails to our virtuall VMware server b4. They are on the same net. Often connection drops, we can't ping godzilla with our b4. That means mails from godzilla won't reach b4 and the mails will be in handed into the mailq. Sometimes it takes some hours and the issue will auto fix itself, b4 will wake up and the mail will be delivered. Another thing if we remotely ssh into the b4, the b4 will wake up and and receive any mailq mails from godzilla and deliver them. netadmin@b4:/var/log$ arp -a ? (192.168.209.80) at 00:1E:C9:AE:79:9D [ether] on eth0 root@godzilla:/usr/local/bin# arp -a ? (192.168.209.20) at 00:50:56:91:7d:b2 [ether] on eth0

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• Why is the size of windows off by 226x238 if defined via the Window Rules?

  - by Bobby

  I have installed Sawfish 1.8.2 from source on my new Ubuntu 12.04 installation following the Debian instructions, but I had this problem also with the stock 1.5.3. Whenever I define dimensions in the Window Rules for a window, the size is off by exactly 226x238 pixels, which means that 100x100 turns into 326x328. That's a very odd behavior, given that Sawfish is saving and loading the dimensions of the windows correctly (if saved via the window menu). Some additional system information: $ uname -a Linux Dagon 3.2.0-24-generic-pae #39-Ubuntu SMP Mon May 21 18:54:21 UTC 2012 i686 i686 i386 GNU/Linux $ sawfish --version sawfish version 1.8.2 nvidia proprietary driver, 9600GT Two monitors, 1920x1080 + 1440x900 in one session. Positionng the windows is working fine, only the dimensions are off by that odd number. Does somebody have an idea why?

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• Has anyone tried the "Secret LCD Monitor" hack? [closed]

  - by cornjuliox

  I'm genuinely curious to know, has anyone tried this hack? I can get LCD monitors for cheap at a place near where I live, and I'd like to try it myself, but I'd like to get more info on it before I do so to increase my chances of success. I'm looking for more info on the entire process, especially about any solvents I can use should I run into any glue problems. Questions for anyone that HAS tried it: Does it actually work, or is this some gag? If it works, is there any decrease in image quality or viewing angles? Since the polarization filters are essentially stuck to glasses, does that mean you're going to have to sit directly in front of the monitor at all times, and any shift in your position means that you won't be able to see the image? Does it improve/worsen ghosting or other LCD artifacts? Are there any problems with eye strain?

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• Outgoing email getting stuck in outbox and sent out multiple times.

  - by Alain

  I have someone with 3 accounts on Outlook - one of them is giving trouble, in that when sending mail from it, it gets stuck in the outbox, saying it hasn't sent yet. When it finally does send off, he gets reports that about 10 copies have been received. The webmail associated with that account works fine, which means the hosting company (Godaddy) hasn't been helpful in solving this problem. It seems to be an Outlook issue. The other two email accounts (one of which is also a Godaddy email), work normally.

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• Prevent member of administrator group loging in via Remote Desktop

  - by Chris J

  In order to support some build processes on our Server 2003 development servers, we require a common user account that has administrative privs. Unfortuantly, this also means that anyone that knows the password can also gain admin privs on a server. Assume that trying to keep the password secret is a failed exercise. Developers that need admin privs already have admin privs so should be able to log in as themselves. So the question is a simple one: is there anything I can configure to prevent people (ab)using the account to gain administrator on servers they shouldn't have administrator on? I'm aware that devs could disable anything that is put in place, but that's then down to process and auditing to track and manage. I don't mind where or how: it can be via the local security policy, group policy, a batch file executed in the user's profile, or something else.

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• Redundant Router and Load Balancing vs. DDoS attack

  - by colgatta

  With a small server farm at a hoster with great support and conditions, I worry about the increasing number of DDoS attacks against this hoster (not my web project, but other clients on the same location). I have booked a redundant router and load balancer as managed service with this hoster to share the load with all the dedicated servers. However, I was lost again today because another one's project was attacked with DDoS for hours :-( Each hour means hundreds of dollars loss whenever my adserver and tracking is not reachable. Even time-out advertising have to be paid by me but can not be resold to my clients without the servers being available. All the time, the servers, the load and traffic is OK and health, but no chance to keep this stable/online if the hoster is vulnerable. Anyone has ideas or suggestions how to protect - even against DDoS?

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• What are some IT jobs where you don't sit at a desk for 8-10hrs a day?

  - by zippy

  Like a lot of people in IT I sit at a desk for 8-10hrs/day working on stuff that needs to get done "now". That usually means eating unhealthy lunches at my desk, and sometimes dinner too. This does terrible things to your health. I have been trying to work some exercise into the workday but I was thinking it would be great if I worked somewhere where I was exercising all the time (walking around, lifting servers, etc.). Does anyone have a job in IT (or know someone) where you are actually moving around (not sitting) doing something for most of the day?

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• When can an FTP server close its passive connections?

  - by Don Kirkby

  Does the FTP protocol allow the server to close any of its passive connections while the client is still connected? Can it tell when the client is finished receiving and then close the connection? I'm including an FTP server in my application using the pyftpdlib Python project. I've got it to work in active and passive mode, but I'm a bit concerned about when it closes its passive connections. I've tried connecting to it with both FileZilla and the default ftp command in Ubuntu, and in both cases, I get a new passive port for every request. That is, if I sit in the root folder and type ls 10 times, I use up 10 ports. This means that I have to allocate a big block of passive ports for the FTP server to use so it won't run out. As soon as the client disconnects, the server releases all the passive connections associated with that client and those ports can be reused. However, a long-running connection could use up a lot of ports.

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• Restoring files from blueprint on command

  - by Nick

  I am setting up a server. I already have rented a machine running centOS 6 but I have run into a bit of a technical problem with configuring the server software: The server will have some files that it will try to read/write to them but what I need is a way to have a blueprint of these files and everytime the server restarts the files that it used get deleted and replaced by the blueprints. I have heared of a RAM disks or Virtual File Systems but didnt quite understand how they work or how to set them up. The server software is written in java which means bash commands can be run from it. I cannot modify what happens when the server shuts down entirely what I can do is run a command before the server runs the final shutdown save

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• Permission issue when deleting folders

  - by nate

  I can't delete some folders and some actions are being denied because I do not have administrator access. But in my user account it says i am an administrator. I also just upgraded from Windows Vista 64-bit to Windows 7 64-bit, but I had this problem before upgrading, but now I am being denied more things. I also can't reorder the way files are sorted in folders. I can sort them through the default means, but I literally can't drag and drop them if I want to reorder them. I don't know if this is another problem or if it is related. Let me know if you need more information. Thanks!

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• tcp handshake failed.client send rst (after syn-ack). can any one advice?

  - by user1495181

  architecture: 2 linux computer connected . on the second (192.168.1.1) one run apache server . I have a small program that take tcp packets from nfqueue change the dst ip to 192.168.1.1 in case that the dst ip is 192.168.1.2 (i know that i can do it with iptables , but my program will do more things in the future), fix check sum and return to the queue. if i call to telnet 192.168.1.1 , means that my program dosnt need to do any manipulation, handshake is OK. If i call to telnet 192.168.1.2 , my program change the dest. server get the syn and return syn-ack, but right after getting the syn-ack the client send rst. Can anyone advice? wireshark of the telnet tcpdump of the telenet above

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• How full is too full for mechanical hard drives?

  - by Sunny Molini

  I have heard many claim that it doesn't matter how full a drive is until it starts cutting into temp and virtual memory space. This doesn't make sense to me, given the nature of how the data is transacted on a hard drive. The inside of the platter presents less data per revolution than the outside of the drive does, by significant factors. The inside 40% of the radius of full size hard drive is used for the spindle, so only the outside 60% is used for data storage, but that still means that the inside track of a hard drive presents data 60% slower than the outside track. By my calculation, a Hard drive that is only 10% full should perform about 2.25 times faster than a hard drive that is 90% full, assuming that the flow is constrained by other factors. Am I wildly off base here? For all the drives I know, even the top speeds of the first 1% of the drive would be well within the bandwidth provided by a SATA 2 connection.

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• What is the largest flatscreen monitor available for PC use?

  - by Avery Payne

  I'll qualify this specifically (by order of preference): must have the highest diagonal measurement, widescreen or "normal" aspect ratio doesn't matter here, just the diagonal. must have the highest resolution available, which means 72 inches of 1280x1024 won't cut it. must not have a TV tuner built into it, I'm not looking for a TV set, this is a monitor! must be available at a retail outlet that caters to the general public, i.e. Best Buy, Sears, Costco (all of these examples are in the U.S., although you can suggest something from whatever chain is in your area/nation/geography). Non-retail or non-physical venues like eBay, or businesses that only cater to other businesses, do not qualify under this requirement. I should be able to walk into this place and purchase it, not just whip up an order online. If you are unsure about this requirement, just ask yourself: can I physically see it before I open my wallet and purchase it?

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• How to efficiently dump a huge MySQL innodb database?

  - by Jagbir

  I got an Ubuntu 10.04 production MySQL database server where total size of database is 260 GB while size of root partition is itself 300 GB where DB is stored, essentially means around 96% of / is full and there's no space left for storing dump/backup etc. No other disk is attached to server as of now. My task is to migrate this database to other server sitting in different datacenter. Question is how to do that efficiently with minimum downtime? I'm thinking in line of: Request to attach an extra drive to server and take a dump in that drive. Transfer dump to new server, restore it and make new server slave of existing one to keep data in sync When migration is needed, break replication, update slave config to accept read/write requests and make old server read-only so it won't entertain any write requests and tell app developers to update there config with new IP address for db. What's your suggestions to improve this or any alternate better approach for this task?

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• How to change Winamp's default skin to Bento?

  - by glasnt

  If I install Winamp through automated means (e.g. Using http://ninite.com/), it is automatically installed using the default 'boxy' skin. I can't work out how to interface with this skin as easily as the new 'Bento' skin. In addition, there doesn't seem to be an option to download the Bento skin, or change the skin from Default to Bento without uninstalling and reinstalling it again. Is there a menu option or a downloadable skin that is the default Bento skin? Or do I have to re-install to get this 'new default' skin?

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• How can I switch Linux running OS from disk to running from RAM without restarting?

  - by vfclists

  Is it possible to switch to running Linux from RAM or RAM disk after starting starting initially from disk? eg. You need to make an image of your hard disk, FTP it to a remote location, some time later you want the image back, so you start the system from disk as usual, restore the image you FTP'd from the remote location back into place. More like a CloneZilla backup and restore, without booting the server from CD or USB disk, but starting from the normal hard disk? Notes on environment I should have mentioned it earlier. It is a remotely hosted VM where I cannot boot into a recovery console mode or do a netinstall. It will always boot onto the same disk. Which means that if there is some serious corruption I can't repair it offline, which is why being able to ftp a previously saved backup into place is so important

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• How do I take some RAM and use it towards Dedicated video memory for my Nvidia graphics card?

  - by Noah Rainey

  I have a Nividia GeForce 6150SE nForce 430 graphics card (so it's quite old), it only gets 64MB of dedicated memory by default. I went into the bios and see if I can increase it, but it wouldn't let me. However, from the Nividia control panel I see I have up to 1071MB of total available graphics memory. I'm not sure what that means and I'm not sure how I can harness this memory and use some RAM for my graphics card. Can someone explain if this is possible and if so, how?

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• Run Active Directory Admin Center as another user

  - by dunxd

  I am trying to run Active Directory Admin Center (dsac.exe) on Windows 7 as another user by means of creating a shortcut, rather than having to Shift+Right click and specify the user. On Windows XP I could create a runas shortcut like this (forget for a moment that dsac.exe does not exist in Windows XP): runas /user:DOMAIN\user dsac.exe When I run this on Windows 7, the cmd style windows pops up and asks for the password for DOMAIN\user, but I get the following message: Attempting to start dsac.exe as user "DOMAIN\user" ... RUNAS ERROR: Unable to run - dsac.exe 740: The requested operation requires elevation. How do I get Windows 7 to automatically run dsac.exe as a specified user? I'm happy to fill in a password prompt for the specified user, but would be even happier if there was a solution that cached the password, so I didn't have to enter it more than once a day.

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• Serve mirrored (static) web-page with original headers

  - by aioobe

  I have a dynamic webpage which I want to create a "frozen" copy of. Typically I would do something like wget -m http://example.com, and then put the files in the document root of the web-server. This site however has some dynamic content, including dynamically generated images, for instance http://example.com/company/123/logo This means that in order to mirror the page, I need to Save whatever headers the server currently serves for each URL. This can be done using the wget option --save-headers. Serve the static pages and serve the proper headers for each file. (This I have no idea of how to do.) What is the best way to solve this? Any suggestions are welcome.

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• importing old .eml files int outlook 2010

  - by Duncan Kenworthy

  I was having so many problems with my laptop & Windows vista that I have updated to Windows 7 64bit. Because I was having so may problems I wanted a 'clean' upgrade so didn't want to carry over any programs or settings. Prior to changing over I saved all the folders I wanted from MS mail to a separate drive and then updated to Win 7 and Office 2010. To my horror I don't seem to be able to import my .eml messages into Outlook which means all my mail is in limbo. Please can anyone help me to simply import my old inbox messages into my new inbox as I have given up trying using the import/export menu as there doesn't seem to be a choice that works. Help!! Not too good a nerd!

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• OpenVZ kernel panic

  - by GtoXic

  I recently installed OpenVZ on my VMWare box (To do some testing) and I get the following: https://www.dropbox.com/s/p38btkv5j84bvsh/Capture.JPG the GRUB config is as follows: # grub.conf generated by anaconda # # Note that you do not have to rerun grub after making changes to this file # NOTICE: You have a /boot partition. This means that # all kernel and initrd paths are relative to /boot/, eg. # root (hd0,0) # kernel /vmlinuz-version ro root=/dev/VolGroup00/LogVol00 # initrd /initrd-version.img #boot=/dev/sda default=0 timeout=5 splashimage=(hd0,0)/grub/splash.xpm.gz hiddenmenu title OpenVZ (2.6.32-042stab057.1) root (hd0,0) kernel /vmlinuz-2.6.32-042stab057.1 ro root=/dev/VolGroup00/LogVol00 sysfs.deprecated=1 initrd /initrd-2.6.32-042stab057.1.img title CentOS (2.6.18-238.el5) root (hd0,0) kernel /vmlinuz-2.6.18-238.el5 ro root=/dev/VolGroup00/LogVol00 initrd /initrd-2.6.18-238.el5.img

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• Why some recovery tools are still able to find deleted files after I purge Recycle Bin, defrag the disk and zero-fill free space?

  - by Ivan

  As far as I understand, when I delete (without using Recycle Bin) a file, its record is removed from the file system table of contents (FAT/MFT/etc...) but the values of the disk sectors which were occupied by the file remain intact until these sectors are reused to write something else. When I use some sort of erased files recovery tool, it reads those sectors directly and tries to build up the original file. In this case, what I can't understand is why recovery tools are still able to find deleted files (with reduced chance of rebuilding them though) after I defragment the drive and overwrite all the free space with zeros. Can you explain this? I thought zero-overwritten deleted files can be only found by means of some special forensic lab magnetic scan hardware and those complex wiping algorithms (overwriting free space multiple times with random and non-random patterns) only make sense to prevent such a physical scan to succeed, but practically it seems that plain zero-fill is not enough to wipe all the tracks of deleted files. How can this be?

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• What does motherboard RAM slot colors mean?

  - by totymedli

  I always saw that the motherboard RAM slots are colored in pairs, but never know what does it means. I just put the 2 RAM in, and after a few tries it always worked. But after I tried to install a third one it always throws me a blue screen of death. Is there an order how should I install RAM to the borad? What does the colors mean? Does they indicate performance boost opportunity or are they just a guide for installation?

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• Having problems with Grub2 booting Ubuntu from my External Hard Drive

  - by anonymous

  I installed Ubuntu on my external hard drive but it won't boot on my laptop. what do i do? i did some reading and traced the source of the problem to grub2. Apparently, grub2 doesn't use the device's UUID, and uses the linux directory instead (/dev/sdf2). This means that whenever i plug my E-HDD into a system that has a different number of drives connected to it, i won't be able to boot without editting the boot command. I don't understand it too well but that's what i got from what i read. Is there anyway to fix this?

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• My laptop was stolen. What do I need to do?

  - by chris

  My laptop was recently stolen. It was a corporate system running XP, which means it was part of a domain - I'm assuming that makes it impossible for someone to log into it, although I know there are ways to reset the local admin account. Is there any way to tell if someone boots it up? I was logged into gmail, using two factor authentication. I will change my password, but is there any chance of tracking any attempted accesses? Other than changing passwords on all my web accounts, is there anything else I need to do?

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