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• http port 80 slow, while other ports are fine

  - by lydonchandra

  I am using ADSL2+, and the sustained connection can go up to 1.3MB/s, but recently the HTTP connection has been quite slow ( other port i.e. ftp, torrent, etc are fine). I am using Netgear modem/router for my ADSL connection, and am using Netgear switches for my LAN (connected to the modem). What can go wrong and how can I investigate?

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• Error starting glassfish on port 80 on Ubuntu

  - by Stuart

  Hi all, I'm having some trouble starting Glassfish on port 80 - doing so yields the following error: 0.0.0.0:80: initialize: name or service not known Any tips?

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• Email server for huge number of subscriber

  - by bogha

  My question is that my company is thinking of providing a free email account for each of its customers. As a new company we will assume that our corporate email system will be MS Exchange server which will support about 1000 employees. They are asking why not adding the customer list to be a part of Exchange users. My suggestion was to separate the two systems, for the corporate we can use Exchange but for customers (around 30000) we have to use a Linux based system. My only argument was that Linux can be used for enterprise services like this and Microsoft may fail. What do you suggest? And if you are with me on choosing Linux as the server platform, what do you suggest to use as an alternative for Exchange in Linux? Thank you.

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• How to Turn Your Home Ubuntu PC Into a LAMP Web Server

  - by YatriTrivedi

  Got a Linux PC you want to put to work? Maybe you’re not comfortable with the command-line only version of Ubuntu Server Edition. Here’s how to keep the standard Ubuntu desktop and add web-serving capabilities to it. Whether you’re not comfortable with a command-line only system, you’re using your Ubuntu desktop for other things, or you just need it installed for a few particular apps, you can add Apache, MySQL, and PHP to any standard desktop installation of Ubuntu very quickly and easily Latest Features How-To Geek ETC How to Integrate Dropbox with Pages, Keynote, and Numbers on iPad RGB? CMYK? Alpha? What Are Image Channels and What Do They Mean? How to Recover that Photo, Picture or File You Deleted Accidentally How To Colorize Black and White Vintage Photographs in Photoshop How To Get SSH Command-Line Access to Windows 7 Using Cygwin The How-To Geek Video Guide to Using Windows 7 Speech Recognition Stylebot Customizes Web Pages in Chrome, Now Has Downloadable Styles Blackberry, Dell, Apple, and Motorola Tablets Compared [Infographic] Encrypt Your Google Search Queries Vintage Posters Showcase the History of Tech Advertising Google Cloud Print Extension Lets You Print Doc/PDF/Txt Files from Web Sites Hack a $10 Flashlight into an Ultra-bright Premium One

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• Method to integrate Powershell scripts with non-Windows workflow?

  - by Matt Simmons

  I love the smell of new machines in the morning. I'm automating a machine creation workflow that involves several separate systems across my infrastructure, some of which involve 15 year old perl scripts on Solaris hosts, PXE Booting Linux systems, and Powershell on Windows Server 2008. I can script each of the individual parts, and integrating the Linux and Unix automation is fairly straightforward, but I'm at a loss as to how to reliably tie together the Powershell scripts to the rest of the processes. I would prefer if the process began on a Linux host, since I imagine that it will end up as a web application living on an Apache server, but if it needs to begin on Windows, I am hesitantly okay with that. I would ideally like something along the lines of psexec for Linux to run against Windows, but the answer in that direction appears to by Cygwin, and as much as I appreciate all of the hard work that they put in, it has never felt right, if you know what I mean. It's great for a desktop and gives a lot of functionality, but I feel like Windows servers should be treated like Windows servers and not bastardized Unix machines (which, incidentally, is my argument against OSX servers, too, and they're actually Unix). Anyway, I don't want to go with Cygwin unless that's the last and only option. So I guess what I'm asking is if there is a way to execute jobs on Windows machines from Linux. Without Cygwin. I'm open to ideas and suggestions, including "Look idiot, everyone uses Cygwin, so suck it up and deal with it". Thanks in advance!

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• Formatting a memory stick with two partitions?

  - by Marius

  I have a 16GB memorystick which used to have a Linux partition. It therefore has two partitions; 2GB FAT32 and 14GB linux boot drive. The linux part stopped working, so I decided to reinstall it. But windows can't see that partition. I tried formatting the whole disk, but I can only format one partition (the FAT32). There seems to be no way to combine the two partitions into one big one, and there seems to be no way for windows to partition the large part of the memorystick to but Linux on it. In the windows partition manager, windows sees the large unused partition, and it let me delete it. But once I have deleted it, I'm not allowed to format it. Also I cannot delete or resize the small partition. So, to summarize: I have a memorystick with two partitons. Windows only sees one of them, and won't let me use the other one. I would like to combine the two partitions so I can install Linux on the memory stick again.

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• VMware Kernel Module Updater hangs on Ubuntu 13.04

  VMware Player has a nice auto-detection of kernel changes, and requests the user to compile the required modules in order to load them. This happens from time to time after a regular update of your system. Usually, the dialog of VMware Kernel Module Updater pops up, asks for root access authentication, and completes the compilation. VMware Player or Workstation checks if modules for the active kernel are available. In theory this is supposed to work flawlessly but in reality there are pitfalls occassionally. With the recent upgrade to Ubuntu 13.04 Raring Ringtail and the latest kernel 3.8.0-21 the actual VMware Kernel Module Updater simply disappeared and the application wouldn't start as expected. When you launch VMware Player as super user (root) the dialog would stall like so: VMware Kernel Module Updater stalls while stopping the services Prior to version 5.x of VMware Player or version 7.x of VMware Workstation you would run a command like: $ sudo vmware-config.pl to resolve the module version conflict but this doesn't work anyway. Solution Instead, you have to execute the following line in a terminal or console window: $ sudo vmware-modconfig --console --install-all Those switches are (as of writing this article) not documented in the output of the --help switch. But VMware already documented this procedure in their knowledge base: VMware Workstation stops functioning after updating the kernel on a Linux host (1002411). Update As of today I had the first kernel upgrade to version 3.8.0-22 in Ubuntu 13.04. Don't even try it without vmware-modconfig...

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• Make UEFI, GPT, Bootloader, SSD, USB, Linux and Windows work together

  - by user129552

  I like to use the latest hardware and the latest software; thus I have a Laptop (Lenovo X220) with UEFI instead of BIOS an SSD instead of an HDD GPT partitioning scheme instead of MBR USB to boot from instead of optical disks. I need to use both Windows and Linux. I tried to make them work alongside, but I didn't succeed. Most Linux distribution isos don't even really work on UEFI systems booted from USB. (Not even the self-claimed cutting-edge Fedora. I also tried Linux Mint Debian Edition and Sabayon Linux (according to this guide) which did not work. Only Ubuntu worked for me. I first installed Windows 8 which created sda1: Recovery, sda2: EFI system, sda3: msftres, sda4: NTFS Windows. Windows worked without a problem. I then created sda5: linux-swap and installed Ubuntu into sda6: btrfs. After rebooting, I was not presented GRUB2 as expected, but instead my system just booted into Ubuntu. I could no longer access Windows. After fixing dpkg in btrfs Ubuntu, I followed the Ubuntu documentation on UEFI booting. The result left me with a broken GRUB2, but interestingly, when I wanted to select the device to boot from, I was not only presented the internal SSD, an attached USB device, or LAN, but also Grub2 (broken), Ubuntu and Windows. The result is not very satisfying to me. What would I have to do to fix everything? Or differently asked, what operating system should I install at what point given my possibilities and requirements, so that I have a working bootloader in my UEFI GPT system which presents me a working Linux and Windows.

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• Should smtp port be blocked on server?

  - by pdeva

  I have a newbie security related question. Should port 25 (smtp) be blocked by firewall on my server? Or will doing so mean that i cannot send any mail at all?

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• FTP passive mode with limited port range?

  - by Phil Keeling

  I am running FileZilla FTP Server with passive mode enabled, and due to firewall constraints I have to limit the passive mode port range to only 6 ports. My question is how would FileZilla handle any situation where more than 6 concurrent FTP connections are active and want to passively upload a file. Would it queue the connections and prioritise them in a first in, first out manner? I'm not too familiar with FTP so any insight would be appreciated.

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• dpkg reporting as installed, uninstalled kernels

  - by Tony Martin

  I have run the following command to remove old kernels: dpkg -l 'linux-*' | sed '/^ii/!d;/'"$(uname -r | sed "s/\(.*\)-\([^0-9]\+\)/\1/")"'/d;s/^[^ ]* [^ ]* \([^ ]*\).*/\1/;/[0-9]/!d' | xargs sudo apt-get -y purge and only the current kernel is now installed, which I have confirmed in synaptic and by checking my boot partition. However, when I run: dpkg --list | grep linux-image I get the following response: rc linux-image-3.13.0-30-generic 3.13.0-30.55 amd64 Linux kernel image for version 3.13.0 on 64 bit x86 SMP rc linux-image-3.13.0-32-generic 3.13.0-32.57 amd64 Linux kernel image for version 3.13.0 on 64 bit x86 SMP ii linux-image-3.13.0-34-generic 3.13.0-34.60 amd64 Linux kernel image for version 3.13.0 on 64 bit x86 SMP rc linux-image-extra-3.13.0-30-generic 3.13.0-30.55 amd64 Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP rc linux-image-extra-3.13.0-32-generic 3.13.0-32.57 amd64 Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP ii linux-image-extra-3.13.0-34-generic 3.13.0-34.60 amd64 Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP ii linux-image-generic 3.13.0.34.40 amd64 Generic Linux kernel image Probably not a problem, but just wondering why versions -30 and -32 are reported as present. Can it be rectified? TIA

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• Can't install Linux drivers for ASUS N-13 wireless adapter

  - by jcc

  I have a USB N13 wireless Adapter with install CD-- For Windows. I downloaded drivers from ASUS FOR N13 for Linux. Disregard install CD that came with adapter; it's for Windows. I then downloaded Windows Wireless driver install program app from Software Center in Ubuntu 12.10. The problem is me. I am newbie with all things linux; software sources, G Debi, default archive manager, synaptic package manager and the Terminal. The downloaded driver file is a .zip file. I managed to extract it to a tar.gz file and then to open it to the contained files. When I use the Windows Wireless driver program it ends up telling me there is no .inf file and goes no further. It wants to install .inf file but I don't even see one in all the files. Can someone please help me . I think you can tell by my wording I don't have a clue. I hope this is'nt too chatty. I've tried to be explicit and to the point. Thank you. Oh, this is on an ASUS LAPTOP K53E. I've looked all over Ask Ubuntu and finally found some questions even on the N13 but they didn't help; still some differences in the exact problem.

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• CentOS - Yum doesn't update anymore?

  - by Xanathos

  I've been trying to use yum now, but for some reason, not even the search work anymore. I even tried putting packages I already downloaded in the search criteria and is the same. [root@AMDFX03 Downloads]# yum search glibc Loaded plugins: fastestmirror, refresh-packagekit, security Loading mirror speeds from cached hostfile epel/metalink | 22 kB 00:00 * base: centos.secrel.com.br * epel: archive.linux.duke.edu * extras: centos.secrel.com.br * rpmforge: apt.sw.be * updates: centos.secrel.com.br adobe-linux-x86_64/primary | 1.2 kB 00:00 http://linuxdownload.adobe.com/linux/x86_64/repodata/primary.xml.gz: [Errno -1] Metadata file does not match checksum Trying other mirror. Error: failure: repodata/primary.xml.gz from adobe-linux-x86_64: [Errno 256] No more mirrors to try. This error always appear no matter what I do. Please, can you tell me how to fix this, or at least how to reset yum's configuration?

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• dd on entire disk, but do not want empty portion

  - by Jonathan Henson

  I have a disk, say /dev/sda. Here is fdisk -l: Disk /dev/sda: 64.0 GB, 64023257088 bytes 255 heads, 63 sectors/track, 7783 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x0000e4b5 Device Boot Start End Blocks Id System /dev/sda1 * 1 27 209920 83 Linux Partition 1 does not end on cylinder boundary. /dev/sda2 27 525 4000768 5 Extended Partition 2 does not end on cylinder boundary. /dev/sda5 27 353 2621440 83 Linux /dev/sda6 353 405 416768 83 Linux /dev/sda7 405 490 675840 83 Linux /dev/sda8 490 525 282624 83 Linux I need to make an image to store on our file server for use in flashing other devices we are manufacturing so I only want the used space (only about 4gb). I want to keep the mbr etc... as this device should be boot ready as soon as the copy is finished. Any ideas? I previously had been using dd if=/dev/sda of=[//fileserver/file], but at that time, my master copy was on a 4gb flash ide.

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• Can I control power to one USB port?

  - by karakonjul

  I have a Microsoft Reclusa and I don't want the backlight on while I am not there. I want to turn the USB port's power off to stop the backlight at night. Is there any software that will do this for me?

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• Port scanning from localhost

  - by Jaels

  I see lot of tcp connections on different ports on my server with 'TIME_WAIT' status. Just simple port scan, but i cant see ip address of this bastard because connections is going from my nginx. Can you please give me a tip how can i see IP address of this bastard? Here is example: [root@vh9 ~]# netstat tcp 0 0 srv:http srv:53280 TIME_WAIT tcp 0 0 srv:http srv:53536 TIME_WAIT tcp 0 0 srv:http srv:52768 TIME_WAIT tcp 0 0 srv:http srv:53024 TIME_WAIT

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• stored procedure in mysql not working in 64 bit windows server 2008

  - by abhi

  i have application in spring .its is deployed in Linux machine and windows server 2008. i am using mysql 5.5.32 in my linux server and mysql 5.5.13 in windows server 2008. stored procedure in mysql is working perfectly in Linux machine but while calling stored procedure from windows,its is working partially that is some integer values is set as 0.if i restart the tomcat and call that stored procrdure then t is working. i dont know the exact reason .can any one help me to find issue.thanks in advance

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• Web application interacts bi-directional with server program?

  - by Roelof Berkepeis

  I want to write a web application to play chess against the engine Crafty. I'm not new to PHP and javascript, but must learn how to interact with a server process : how can a web application and/or (jQuery) ajax interact bi-directionally with a (linux) program running on the server? At this moment i am developing on (Apache) local host. Crafty is installed on my Ubuntu PC. This well-known chess engine has no GUI, it runs in terminal by the command $ /usr/games/crafty and so you can play chess against it and even see it's calculations. I can make Crafty run by PHP, using the functions proc_open() or exec(), and most documentation i found states that the output stream should be a file .. But i think i don't want such setup, because then the webpage should be constanty polling that file (eg. by ajax) to see if some new data was appended, right? How can Crafty talk to the web page directly, saying "i have calculated another variation" or "i have decided a move" etc, then display this info on the web page and let the user give some counter move, just like in terminal. Isn't it possible to use some session / stream / listener? I have no clue at all, can anybody point me in a right direction?

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• Add Ubuntu to windows domain

  - by John Isaacks

  I am new to linux. I do not have any knowledge on how to do anything on linux. I just got a new machine and successfully installed ubuntu onto it. The first thing I want to do is join the domain the rest of the computers are on. How do I do that. I tried googling it but all the results assume some sort of linux knowledge and I have none.

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• Restoring file properties but not the complete files, from backup

  - by Jon

  While copying data from my old storage on a Linux computer to the new (linux-based) NAS, I accidentially failed with getting the properties (most important: the modify dates) along to the new location. I also continued to use/modify the files at the new location and hence, cannot just copy it all over again. What I would like to do is a diff between files in the old vs. the new storage, and for those being identical, restore the properties from Linux storage to the NAS storage files. Is there a clever way such as a script or a tool to do this? I could either run it on the Linux box or in worst case from a remote Windows computer. Grateful for any suggestions. /Jon

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• VPN/IPsec for RD, port 80,

  - by Andrew

  I have two Windows VPS's that talk to each other. 1) I already firewall Remote Desktop to a few IPs. I want to require me to connect instead to the server via VPN (IPSec?) in order to then be able to RD. 2) I want to also only permit access to port 80 on the server if I am VPN'd in to the server (authenticated) 3) If possible, I want to secure communication between other VPS's I have using the same method? Thanks

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• Locate which port on switch a PC is plugged into

  - by ggonsalv

  The catch is you have no SNMP access, not even public. The end vision is locate a PC in building easily even if PC's are moved around. The MAC address of the PC is known and the software would run as client on each desktop, reporting back which port the PC was plugged into.

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• How small can/should I make my partitions?

  - by Pureferret

  My machine is currently split into 3 user partitions (plus however many Windows and Linux have decided to slyly create) Which are C: Windows 7, D: Data, and E(?): Ubuntu. I'm considering wiping my Windows 7 Install (stupid Skyrim not installing) and restructuring the way my machine operates. I want the partitions for the Windows and Linux install to be as small as possible while still able to function well, and be able to install games on my Windows C: drive. I then want to link from both Win7 and Linux drives to the middle D drive so that the in built My Documents (and etc on windows) folder and my Home folder (linux) share a common location, rather than my current situation which is 3 separate file locations. Something like this: I have 1 TB to play with and I want to know the 'best' sizes to make these partitions when I reinstall Windows (which I need to do anyway) and re-jig everything.

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• Two DHCP Servers, Block Clients for one of them?

  - by Rilindo

  I am building out a kickstart network that resides on a different VLAN uses its own DHCP server. For some reason, my kickstart clients kept getting assign IPs from my primary DHCP server. The way I have it set up is that I have a primary DHCP server on this router here: 192.168.15.1 Connected to that DHCP server is a switch with the IP of 192.168.15.2. My kickstart (Scientific Linux) server is connected to that switch on two ports: Port 2 - where the kickstart server communicates to the rest of the production network via eth0. The IP assigned to the server on that interface is 192.168.15.100 (on eth0). The details are: Interface: eth0 IP: 192.168.15.100 Netmask: 255.255.255.0 Gateway: 192.168.15.1 Port 7 - has it's own VLAN ID (along with port 8). The kickstart server is connected to that port with the IP of 172.16.15.100 (on eth1). Again, the details are: Interface: eth1 IP: 172.16.15.100 Netmask: 255.255.255.0 Gateway: none The kickstart server runs its own DHCP server and assigns them over the eth1. Most of the kick starts are built over the kickstart VLAN through port 8. To prevent the kickstart DHCP server from assigning addresses over the production network, I have the route setup like so: route add -host 255.255.255.255 dev eth1 At this point, the clients kept getting assign IPs from the 192.168.15.1 DHCP server. I need to figure out a way to block client requests from reaching that DHCP. Its should be noted that but I also build KVM hosts on the kickstart server as well, so I need those KVMs to have the ability to get DHCP requests from the 192.168.15.1 DHCP server via the bridge network once I finish resolved this particular problem. (Currently, they communicate via NAT). So what would be done to resolve this? Through iptables or some sort of routing I need to put in? I tried to limited to requests via IPtables on that interface, allowing DHCP requests for 172.16.15.x network: -A INPUT -i eth1 -s 172.16.15.0/24 -p udp -m udp --dport 69 -j ACCEPT -A INPUT -i eth1 -s 172.16.15.0/24 -p tcp -m tcp --dport 69 -j ACCEPT -A INPUT -i eth1 -s 172.16.15.0/24 -p udp -m udp --dport 68 -j ACCEPT -A INPUT -i eth1 -s 172.16.15.0/24 -p tcp -m tcp --dport 68 -j ACCEPT -A INPUT -i eth1 -s 172.16.15.0/24 -p udp -m udp --dport 67 -j ACCEPT -A INPUT -i eth1 -s 172.16.15.0/24 -p tcp -m tcp --dport 67 -j ACCEPT And rejects assignments on eth1 from 192.168.15.x network: -A FORWARD -o eth1 -s 192.168.15.0/24 -p udp -m udp --dport 69 -j REJECT -A FORWARD -o eth1 -s 192.168.15.0/24 -p tcp -m tcp --dport 69 -j REJECT -A FORWARD -o eth1 -s 192.168.15.0/24 -p udp -m udp --dport 68 -j REJECT -A FORWARD -o eth1 -s 192.168.15.0/24 -p tcp -m tcp --dport 68 -j REJECT -A FORWARD -o eth1 -s 192.168.15.0/24 -p udp -m udp --dport 67 -j REJECT -A FORWARD -o eth1 -s 192.168.15.0/24 -p tcp -m tcp --dport 67 -j REJECT Nope. :(

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• how to access a mounted device, How can I access the partitions with the console

  - by user1796624

  Hi I'm new to ubuntu and linux so this might be a very begginers question. I have several partitions on my pc and I want to be able to access them with the console. When I type: sudo fdisk -l I get: /dev/sda1 * 2048 97656831 48827392 7 HPFS/NTFS/exFAT /dev/sda2 97656832 234375167 68359168 7 HPFS/NTFS/exFAT /dev/sda3 * 234375168 312500223 39062528 83 Linux /dev/sda4 312502270 625141759 156319745 5 Extended /dev/sda5 312502272 318359551 2928640 82 Linux swap / Solaris /dev/sda6 318361600 625141759 153390080 83 Linux But it seams that the address is existing. for example I cant do cd /dev/sda4. How can I access the partitions with the console?

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