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• Starting VM as an executable with as low overhead as possible

  - by Robert Koritnik

  Is there a solution to create a virtual machine and start it by having an executable file, that will start the machine? If possible to start as quickly as possible. Strange situation? Not at all. Read on... Real life scenario Since we can't have domain controller on a non-server OS it would be nice to have domain controller in an as thin as possible machine (possibly Samba or similar because we'd like to make it startup as quickly as possible - in a matter of a few seconds) packed in a single executable. We could then configure our non-server OS to run the executable when it starts and before user logs in. This would make it possible to login into a domain.

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• MySQL Optimizing

  - by Thoman

  Hello My web use an dedicated Intel(R) Xeon(R) CPU E5620 8core 12Gram Centos32bit/Driectadmin DISK SAS 80G Php-cgi This dedicated running one website Use wordpress 2.92(+plugin cache...) Database size 600MB only 100online But mywebsite runing very snow. please hep me config file my.cnf [mysqld] user=mysql key_buffer=128M set-variable = max_connections=1000 socket = /var/lib/mysql/mysql.sock key_buffer =32M table_cache = 1024 open_files_limit = 16344 join_buffer_size = 8M read_buffer_size = 8M sort_buffer_size = 8M tmp_table_size=512M read_rnd_buffer_size=8M max_heap_table_size=256M #myisam_sort_buffer_size=256M thread_cache_size=8 thread_cache=32 query_cache_type=1 query_cache_limit=1024M query_cache_size=1024M thread_concurrency = 16 wait_timeout = 10 connect_timeout = 10 interactive_timeout = 10 long_query_time=1 log-slow-queries = /var/log/mysqlslowqueries.log max_allowed_packet=32M skip-innodb [myisamchk] key_buffer = 64M sort_buffer = 64M read_buffer = 16M write_buffer = 16M [isamchk] key_buffer=64M sort_buffer=64M read_buffer=16M write_buffer=16M And apache

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• Type 1 Hypervisor on the desktop

  - by Blazemore

  I have a powerful home PC, and I've used VirtualBox to run Linux distros in Windows (and vice versa). I'm interested in trying out a lightweight type 1 hypervisor to run all my operating systems (Windows 7, Debian, Arch) and was looking for suggestions of which to pick and how to implement this. From what I gather, a type 1 hypervisor is a lightweight OS which simply provides VM management functionality. Will I get reasonable performance under each guest OS? Can all the guest OSs have access to a shared data drive, or is is best to have a storage server in another guest OS and mount it over the virtual network? What about gaming, is this feasible, or will I realistically need to run Win7 on bare metal? I'd appreciate any input.

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• Clone drive in Windows

  - by ERJ

  I have two 2 TB external USB hard drives, call them HD1 and HD2. HD1 is USB 2, HD2 is USB 3. Each drive contains exactly one NTFS partition. I want to clone HD1 to HD2, because it's newer and much, much faster. What's the best way to do this? I don't want to do a copy-and-paste, I want to clone the whole partition. The new drive is actually a few bytes larger, so this should be possible? I don't have a second drive that can hold the image, so it would have to clone directly to the other disk (not to a file). How can I accomplish this on Windows 7? I know about Clonezilla but I would prefer not to have to boot from a CD or anything, as I don't have the capability to do that right now. I want to know if there's a way to do this while running Windows.

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• What are the major distinctions between PureDarwin and FreeBSD?

  - by ??????? ???????????

  I'm looking to install a different unix on my workstation to acquire some perspective on GNU/Linux and out of curiosity. I have narrowed my options down to these two. The reason for considering PureDarwin is because I have very little experience with Apple's products. So my question is will installing and using PureDarwin give me a closer understanding of OSX than would running FreeBSD? What I have in mind are day to day routines like adding users, installing software and configuring various aspects of the underlying OS. I know that the GUI of OSX would not be available, but that is not a concern. As a secondary, less important question, can I buy OS X in the apple store and run it in a virtual machine or does that violate their EULA?

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• Windows doesn't recognise my USB key anymore (it used to work)

  - by dominicbri7

  I use my friend's USB flash drive (Corsair flash voyager 16gb) to transfer files from my laptop to my desktop computer. However, since a couple of days my laptop stopped recognizing the USB key.. while there is still no problems with all other computers. I use Windows 7 64 bits if that can help. I tried uninstalling the driver, rebooting and all those kind of tricks, but it won't work. When I connect it and open the "My computer" window, I see "Removable Disk (G:)" for a moment, then it disappears... then it reappears again and it keeps doing that periodically. I can't even right click then hit "Properties" because it disappears. As I recall, it DOES work on every other computers, I think it has to do with the driver but what can I do?

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• Minimize writes to SSD disks with Windows 7

  - by mark

  Most people use their SSD as their primary system installation disk with Windows 7. W7 already has a lot of optimizations for SSDs, both in terms of performance and lifetime. Minimizing writes increases the lifetime of SSDs, so post each suggestion as an answer and let others vote on them. Update: I'm not sure anymore that minimizing writes is a good thing [tm], hard facts that SSDs will degrade within a noticeable time are missing and it seems this it can create a bit FUD about the functionality of the SSD. In other words: I question the usefulness of my wiki question.

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• Shaping with shorewall complex shaper not work (or I don't understand principle of operation)

  - by strangeman

  I have router (Debian 6) with 2 network interfaces (and 1 virtual tun interface): eth0 - localnet, 192.168.1.0/24, router ip is 192.168.1.1 eth1 - internet tun0 - openvpn to central office. openvpn network - 10.1.0.0/24, central office network - 192.168.0.0/24 I need shape all traffic, which moves 192.168.1.0/24-192.168.0.1:6666 and 192.168.1.0/24<-192.168.0.1:6666, and restrict its speed to 200kbit. Now, I have this configuration, but its not work: tcdevices (set up interface parameters) #INTERFACE IN-BANDWITH OUT-BANDWIDTH eth0 100mbit 100mbit #LAST LINE -- ADD YOUR ENTRIES BEFORE THIS ONE -- DO NOT REMOVE tcrules (mark all traffic, which move on 6666 port) #MARK SOURCE DEST PROTO PORT(S) 1 0.0.0.0/0 0.0.0.0/0 tcp 6666 #LAST LINE -- ADD YOUR ENTRIES BEFORE THIS ONE -- DO NOT REMOVE tcclasses (shape all marked traffic) #INTERFACE MARK RATE CEIL PRIORITY OPTIONS eth0 1 200kbit 200kbit 2 eth0 255 9*full/10 full 1 default #LAST LINE -- ADD YOUR ENTRIES BEFORE THIS ONE -- DO NOT REMOVE Where is my mistake?

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• Application deployment with Puppet

  - by michaeltwofish

  I'm new to Puppet and while I've been using *nix systems for many years, I've never worked as a sysadmin or in ops. I'm currently writing Puppet manifests for hosting a set of (PHP/MySQL/MongoDB, code in git) web applications. Clearly Puppet needs to have some knowledge of the actual applications because I'll set up a virtual host for each one, but I'm not sure whether Puppet should be managing things like code deployment and database creation. Is Puppet an appropriate tool for application deployment? If not, can you recommend a more appropriate tool?

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• Redirecting traffic to a https site

  - by Saif

  In our mail server there are multiple virtual email domain hosted. User can use webmail.example.com (this is the first apache virtualhost) to check mail or they can use mail.THEIR-DOMAIN.com. If the put mail.THEIR-DOMAIN.com apache shows the webmail.example.com as it is the first virtualhost and mail.THEIR-DOMAIN.com doesn't exist. Recently we imposed https for webmail.example.com and added this mod_rewrite rule: RewriteEngine On RewriteCond %{HTTPS} off RewriteRule (.*) https://%{HTTP_HOST}%{REQUEST_URI} But now users not getting the default webmail page as they were getting before. How can we redirect all request coming to the URL "mail.ANY-DOMAIN.com" to "https://webmail.example.com"? I've tried the following but it didn't work: RewriteEngine On RewriteCond %{HTTPS} off RewriteRule (mail.*) https://webmail.example.com Thanks for your help in advance.

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• Is there a software in windows that enables you to boot from a specific partition?

  - by Tono Nam

  I use acronis true image to mount images to my primary partition and it works great. lets say I have 3 partitions on my hard disk and all of them each is 600 GB. In the 3rd partition I keep files (documents, pictures etc), on the first partition is my primary partition where the operating system runs (windows 7). And in the 2nd partition is empty. I have an image of my primary partition and I save that image in my 3rd partition (50 GB is the size of the image so it fits in the partition number 3) and in an external hard drive. I know it is possible to install a new operating system in partition 2 such as windows xp but the only problem is that once I install that how could I tell the computer to boot from partition 1? is there a way to switch back and forth just like it's possible in the mac?

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• Excel 2010 -Excel cannot complete this task with available resources

  - by Jestep

  Getting this error when trying to sort a document (Excel cannot complete this task with available resources). Document isn't particularly large, about 4,000 lines. Can't seem to figure out why this would start on this. I can sort this same file fine on everything back to Excel 2000 on older crappy computers. Computer is running Win 7 x64, 16 Gb RAM, and another 16 Gb of virtual. There's no possible way that all of the memory is actually getting exhausted when I can perform this on an older XP machine with 512 Mb of RAM, unless 2010's memory usage is inconceivably poorly designed. I found a few posts on forums stating that there might be a security update related bug. Any suggestions would be appreciated.

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• Straight-forward to Virtualise with XEN or KVM on IBM Server System x3650 M4 791562G?

  - by ChrisZZ

  I want to built a virtualised Server Environment using XEN or KVM. The virtual machines should be purely debian systems - so XEN or KVM should be a sane choice. Now while buying servers, I am confronted with the fact, that the vendors obviously only support commercial solution. I think, on a good server, one should be able to install uncommercial software as well - but of course sometimes systems have hardware, that requires drivers, that are not found in the OS Community. So I am asked the question: Is it straight-forward to use Debian with IBM Server System x3650 M4 791562G with Debian - or even virtualising the IBM Server System x3650 M4 791562G using XEN or KVM. I am sure there will always be a way to achieve this goal - but this way might have a high milage - so I am not asking, whether this is theoretical possible, but whether this should be straight-forward and practically easy to do, no major headaches to be expected.

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• cant recognize the path of hard drive which is not a part of an array

  - by Abhishek

  hi there, I have a problem on my server as below.. On my server i configured a raid array of 3 hard disks, in my c drive their is a web applications running on Apache Tomcat server. Now because of shortage of storage i entered a new hard disk to the server which is not a part of that raid array. Now through my web application i upload some images to new hard drive and file uploaded successfully but when through that same application, i try to retrieve those images and show on a web site i does not recognize that and dose not give any error. i try to access that drive with absolute path but it not works. Can any one help me to find the solution of this problem? Thank You in advance.

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• Windows 7 formatting HD

  - by Rick

  I have an Acer Aspire 5610 that I am trying to put an Operating System back on. I am trying to install windows 7 32-bit and it will not go through the install. Not sure why. I am now trying to reformat the hard drive and start with a fresh formatted HD. No other partitions. The problem is that the install disk is not doing the format it is giving me an error. The error is 0x8007045d. I am at a loss. This is the first time running into this issue. Please Help.

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• Recover partition table after DD command

  - by Shreedhar

  I executed the following command from a Ubuntu live cd terminal (dont ask why). dd if=/dev/zero of=/dev/sdb2 bs=512 count=1 Where sdb2 is a NTFS partition (third partition) on a disk. Suffice to say it is now messed up. When I boot into windows 7, it does show me E drive but when I click on it it asks me to format it. I am not ever sure what I did, did I mess up partition table or only the MFT? Is there any way to get the data back PLEASE HELP! this is very important :(

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• linux or vmware

  - by bahar

  Hi I don't know if here is the right place to ask this question or not but its vital for me to solve it. I run open suse 10.2 on a vmware and my operating system is vista. yesterday I run my vmware and another program but both couldn't run and I end both tasks to solve it but now I can open vmware without any problem and run another os but not my open suse. the error is: Cannot open the disk 'C:\Users\hamide\Documents\Virtual Machines\SUSE Linux 2\SUSE Linux 2-000003.vmdk' or one of the snapshot disks it depends on. Reason: Failed to lock the file. please help me I don't have any recent back up and It takes too long to do all my project again.:( Bests

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• What is the best way to compare vhost traffic?

  - by Bob Flemming

  Recently one of my servers has been subjected to malicious ddos attacks. I have about 12 websites hosted on the server which uses name based v-hosting. I am trying to identify which virtual host(s) are getting bombarded with traffic. I have used tools such as iftop which is good for identifying hosts which are consuming lots of bandwidth, and also apachetop which is useful for identifying which resources are being requested on a single v-host. What I really need is a tool which allows me to see the amount of traffic being received by each v-host in real time so I can easily see which v-host is being targeted. Does such a tool exist?

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• Uninstall grub from logical partition

  - by Andrew Fleenor

  I'm multi-booting with Windows 7 x64 and (at least) Linux Mint. Because I hadn't yet made a backup of my MBR, when I installed Linux mint on a logical partition, I told the installer to put GRUB on the partition instead of in the MBR. This turned out to be useless, as I need to use GRUB from a boot disk to get into the GRUB I installed... Before installing it in the MBR, I'd like to get it out of the partition, preferably without wiping and reinstalling Linux. I don't relish the prospect of going through two layers of GRUB when I want to boot Linux. How do I get it out, or what other options are available to me?

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• OpenBSD: Gateway outside subnet (works in Linux)

  - by kshade

  We need to set up an OpenBSD host to use a default gateway that's outside of it's subnet. This is all I need to do on Linux (not the actual IPs) to achieve it: ifconfig eth0 33.33.33.33/31 up route add 33.33.33.254 dev eth0 route add default gw 33.33.33.254 The problem is that we don't know the proper equivalent of the middle command in OpenBSD. The man page says: If the destination is directly reachable via an interface requiring no intermediary system to act as a gateway, the -iface modifier should be specified; Sadly we can't seem to figure out how to make it work with that. This is a virtual host on an OVH server, they have documentation for many other operating systems showing how to do it here: http://help.ovh.co.uk/BridgeClient

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• Error installing Java on Ubuntu Server

  - by Camran

  I get this error almost when installation is finished: /proc is not mounted; some java apps may fail Could not create the Java virtual machine. Error occurred during initialization of VM Could not reserve enough space for object heap Ignoring error generating classes.jsa Why is this? I just entered sudo apt-get install sun-java6-jre sun-java6-plugin sun-java6-fonts Is there something I must do first? What is Proc? If you need more input let me know. Thanks

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• Access from one VM to an Other

  - by meo

  I got a Linux VM Image from a dev in our company to develop on it. This works nice, but now i need to do some Internet Explorer testing, for that i have an other VM with windows on it. I have an entry in my hosts file under macos that redirect some virtual domain to the IP of the linux VM. I tried to modify the hosts file in windows also. But i cant reach Linux VM. How can i access the Server on the linux VM with Windows VM? Are there some settings i missed?

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• freebsd dev server on virtualbox over windows

  - by g_kaya

  I need a unixy environment for development purposes. I hate doing things on windows but it is more stable for daily use and I don't have a mac, so I'm having to use windows (7). I want to run freebsd in a virtual machine, configure it to be the localhost server, be able to connect using ssh (within my home-network) and be able to install vbox guest addons. If guest additions aren't the best, I can use solaris or linux flavours. I need no gui. I don't know anything about network stuff, so I need a detailed explanation from vise people here, or a nice doc to read. Edit : To be more specific as requested, I use following on unices: *django 1.4 *apache *python (2.7) *emacs *mysql *probably node.js *bash scripting I use windows to be able to do daily things easily, like connecting to my tablet, browsing and learning java. And I don't want to use linux as my desktop os, beacuse it gets broken a lot, it's annoying to maintain wlan problems and some more.

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• Cannot delete folder - Content seems to be nested recursively

  - by RikuXan

  I cannot delete a folder located on my hard disk by any means. I don't quite know how it was created, all I know is, that it is a pretty deep structure of folders (too deep to delete it at once, since Windows restriction path name too long), but the problem in the end is, that I can't "pull out" the inner folders, because they don't seem to be folders anymore (Context menu lacks things like "Properties", "Cut", "Copy", "Delete" etc.) Here a picture of how a right click looks like on one of these "folders": As you can see, the current folder is in very deep, but that is not the problem, rather the one I left-clicked on. Has anyone any advice on how to get rid of these? I tried a chkdsk, said no errors. I also tried deleting those folder via a VMWare Ubuntu, to no success. I also tried a batch file from a volunteer at MS boards, that should automatically de-nest such folders, but I guess mine is a special case, since the tool only created more such folders.

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• Doing "text mode 'splash' game" during boot.

  - by Vi

  Sometimes I want to do something (for example, playing a simple text-mode game) while the system is booting up. This is especially useful when lengthy reiserfs transaction replays are happening. Current hacky way of doing it is: Put the program on initramfs. Before running /sbin/init, "openvt 2 /my/program". Turn off messages from kernel (sysrq 0) Override /dev/console with /dev/null (to prevent boot messages). The problems are: There are STILL some messages interfering with program output. I can't see boot messages by switching to that virtual terminal back. After finishing the boot sequence, /dev/tty2 ends up being attached both to getty and my program. How to do it properly without of running graphical splashes? The system is Linux Debian Squeeze, no dependency based sysv scripts.

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