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• Are there any benefits to using a Distributed vSwitch for iSCSI?

  - by dunxd

  I am designing our vSphere farm - we'll be migrating from ESX 3.5 to 4.1. I plan to set up a new farm using ESXi 4.1, and move the Virtual Machines on the 3.5 farm into it by shutdown, then import. In ESX 3.5 there is no distributed networking, so each host has a vSwitch connected to my SAN NICs, and a port group for the vmkernel. In vSphere (ESXi 4.1) I have the extra option to set up a distributed vSwitch and distributed port groups for vmkernel to access iSCSI storage. Is there any benefit to this, or should I stick to non-distributed networking for iSCSI.

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• I setup vsftpd on ubuntu server on my ec2 instance, how to connect using SSH?

  - by Blankman

  I connect to my ec2 instance using ssh so I don't have to login each time. I just installed vsftpd on the ubuntu server, but when I connect it obviously asks for my username and password. Since I connect using the ubuntu user that my AMI comes with, I don't even know the root password. Is there a way I can login via ftp using SSH? Or do I just create a user on the system for ftp purposes? I've locked ftp to my IP address, and I will shutdown the ftp service once I'm done as I dont need it running 99.99999% of the time.

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• What can impact the throughput rate at tcp or Os level?

  - by Jimm

  I am facing a problem, where running the same application on different servers, yields unexpected performance results. For example, running the application on a particular faster server (faster cpu, more memory), with no load, yields slower performance than running on a less powerful server on the same network. I am suspecting that either OS or TCP is causing the slowness on the faster server. I cannot use IPerf , unless i modify it, because the "performance" in my application is defined as Component A sends a message to Component B. Component B sends an ACK to component A and ONLY then Component A would send the next message. So it is different from what IPerf does, which to my knowledge, simply tries to push as many messages as possible. Is there a tool that can look at OS and TCP configuration and suggest the cause of slowness?

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• Bash: Quotes getting stripped when a command is passed as argument to a function

  - by Shoaibi

  I am trying to implement a dry run kind of mechanism for my script and facing the issue of quotes getting stripped off when a command is passed as an argument to a function and resulting in unexpected behavior. dry_run () { echo "$@" #printf '%q ' "$@" if [ "$DRY_RUN" ]; then return 0 fi "$@" } email_admin() { echo " Emailing admin" dry_run su - $target_username -c "cd $GIT_WORK_TREE && git log -1 -p|mail -s '$mail_subject' $admin_email" echo " Emailed" } Output is: su - webuser1 -c cd /home/webuser1/public_html && git log -1 -p|mail -s 'Git deployment on webuser1' [email protected] Expected: su - webuser1 -c "cd /home/webuser1/public_html && git log -1 -p|mail -s 'Git deployment on webuser1' [email protected]" With printf enabled instead of echo: su - webuser1 -c cd\ /home/webuser1/public_html\ \&\&\ git\ log\ -1\ -p\|mail\ -s\ \'Git\ deployment\ on\ webuser1\'\ [email protected] Result: su: invalid option -- 1 That shouldn't be the case if quotes remained where they were inserted. I have also tried using "eval", not much difference. If i remove the dry_run call in email_admin and then run script, it work great.

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• Command to determine whether ZooKeeper Server is Leader or Follower

  - by utrecht

  Introduction A ZooKeeper Quorum consisting of three ZooKeeper servers has been created. The zoo.cfg located on all three ZooKeeper servers looks as follows: maxClientCnxns=50 # The number of milliseconds of each tick tickTime=2000 # The number of ticks that the initial # synchronization phase can take initLimit=10 # The number of ticks that can pass between # sending a request and getting an acknowledgement syncLimit=5 # the directory where the snapshot is stored. dataDir=/var/lib/zookeeper # the port at which the clients will connect clientPort=2181 server.1=ip1:2888:3888 server.2=ip2:2888:3888 server.3=ip3:2888:3888 It is clear that one of the three ZooKeeper servers will become the Leader and the others Followers. If the Leader ZooKeeper server has been shutdown the Leader election will start again. The aim is to check if another ZooKeeper server will become the Leader if the Leader server has been shut down. Question Which command needs to be issued to check whether a ZooKeeper server is a Leader or a Follower?

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• windows 7 randomly shuts down. where do I find related log? so that i can identify the error

  - by kirill_igum

  during the normal use, windows 7 shuts down. sometimes it happened when I start google chrome and few times during system update. after it shuts down, I turn it back on and I get to the screen, where windows asks me if I'd like a safe or normal start. the shutdown happens regardless if i'm on a battery or cord is there a log that can tell me where the error is? it can help me to further identify the solution. my setup: I run windows 7 on thinkpad x201 tablet. i have upgraded hard drive that worked fine for the last 6 months. the system is dual boot with ubuntu. I have installed some software recently, may be that can be the problem but sophos anti-virus cannot find anything. updates are all up to date.

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• How can I logoff and go to stand-by via Win XP script?

  - by Peter

  I am looking for a way to write a script (of any sort) that would both log me off my local Windows account and also immediatedly put the computer to sleep / stand-by. I've found solutions that can do one or the other but not logoff and then sleep all in one script. The SHUTDOWN command doesn't offer this and I can't find any other options either. This is for Win XP, SP3 right now but someday soon I'll want a Windows 7 solution as well. Thanks for any ideas or an explanation as to why this isn't possible. :)

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• Certain sites not working in Firefox, working in IE

  - by PSU_Kardi

  Totally weird thing happening on my PC after I came back from the Holiday shutdown. My homepage by default is google.com/ig but when it opens (in Firefox) the G-Mail panel does not display and eventually times out. I then try to navigate to https://www.gmail.com but that also times out. Thinking maybe work decided to drop the ban-hammer on g-mail I decided to try it in Internet Explorer. Oddly enough it works in IE Any idea on why it works fine in one browser but not the other?

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• Under what circumstances might an IIS6 website be automatically deleted?

  - by E. Anderson

  Late last week my colleagues did some hardware maintenance on one of our vmWare esxi servers. One of the guests is a Windows Server 2003 Web Edition system that runs our low-traffic web sites. We discovered this morning that one of those websites was no longer working with what appeared to be an SSL error. After logging in, I found that the web site in question had been deleted from IIS! Is it possible for this to happen without a user actually going in and deleting that single web site? All of the other sites were fine. The files for the site in question had not been touched. I just re-created the web site, assigned the SSL cert, and everything was working again. When I logged in, I did see the 'Unexpected Shutdown' dialog.

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• When I auto-start Supervisord on boot, the [program:start_gunicorn] don't start

  - by Charlesliam

  The [program:start_gunicorn] is running with no error when I manually start supervisord with this setup. [program:start_gunicorn] command=/env/nafd/bin/gunicorn_start priority=1 autostart=true autorestart=unexpected user=nafd_it redirect_stderr=true stdout_logfile=/env/nafd/logs/gunicorn_supervisor.log stderr_logfile=/env/nafd/logs/gunicorn_supervisor_err.log I successfully run this init script for my supervisord. But when I used auto-start init script for supervisord the gunicorn is not running. ]# service gunicorn status gunicorn: unrecognized service What do I need to do to make the [program:start_gunicorn] run when using auto-start supervisord on boot? Here's my gunicorn config. /env/nafd/bin/gunicorn_start #!/bin/bash NAME="nafd_proj" DJANGODIR=/env/nafd/nafd_proj SOCKFILE=/env/nafd/run/gunicorn.sock NUM_WORKERS=1 DJANGO_SETTINGS_MODULE=nafd_proj.settings DJANGO_WSGI_MODULE=nafd_proj.wsgi echo "Starting $NAME as 'NAFD Web Server'" source /env/nafd/bin/activate export DJANGO_SETTINGS_MODULE=$DJANGO_SETTINGS_MODULE export PYTHONPATH=$DJANGODIR:$PYTHONPATH RUNDIR=$(dirname $SOCKFILE) test -d $RUNDIR || mkdir -p $RUNDIR cd /env/nafd/nafd_proj exec ../bin/gunicorn ${DJANGO_WSGI_MODULE}:application --bind=127.0.0.1:8001 \ --name $NAME \ --workers $NUM_WORKERS \ --log-level=debug \` Any idea is really appreciated.

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• Drupal 7 on Windows - File Module Problems

  - by TimothyP

  Installed Drupal 7 using the Web Platform installer on Windows 2008 For some reason, the file module, when you upload a file, uses the first few letters of the filename as the unique key to store in the database, which of course causes problems very fast. I'm wondering does anybody have a workaround for this? An AJAX HTTP request terminated abnormally. Debugging information follows. Path: /file/ajax/field_file/und/0/form-EBMatHzV5cZXcWvXJtdADSdyw7Id9-GIpFM_NCJg_a4 StatusText: n/a ResponseText: Error message PDOException: SQLSTATE[23000]: [Microsoft][SQL Server Native Client 10.0][SQL Server]Cannot insert duplicate key row in object 'dbo.file_managed' with unique index 'uri_unique'. in drupal_write_record() (line 6776 of ..........\includes\common.inc). Error The website encountered an unexpected error. Please try again later. ReadyState: undefined (PS: I hope superuser is the right place to ask)

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• How can I load one image over network to multiple computers on boot?

  - by user754730

  A few years ago I saw this in a company but I don't know how it was built. There was 1 Computer (I don't know if Windows Server or plain Windows 7 - the server) and 3 other computers (Windows 7 - the clients). As soon as the Windows 7 clients were started, they all started up the same image (Don't know if the same image file or just the same state) over network and were able to work on the computer. As soon as the machine was shutdown, all the changes made to the system were erased. How could I build a system like this so I have 1 image file which I keep up to date and then feed it to the other machines in my network? It would look this this basically:

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• Dreamweaver not connecting RDC

  - by thomas

  I am trying to use Dreamweaver to Remote Desktop Connect into a computer where a website is hosted. Normal traffic to this server is routed to another domain, but when accessed by IP (it is my understanding) the traffic never hits any sort of nameserver request, and so stays there. This server is set up so that the only way I can access it is RDC. I can connect using an RDC program, but when I attempt to use Dreamweaver, I get a vague error. The desired action could not be completed because an unexpected client/server communication error occurred. I have Web URL as http://my.ip.number/directory And in the settings panel, I have Host name: my.ip.number Port: 3388 Host directory: C:\Program Files (x86)\directory/directory Username: user Password: ••••••• What could be preventing Dreamweaver form connecting? Thanks! SERVER DETAILS It is a virtual server Windows SERVER 2008 R2 Standard Service Pack 1

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• How to find what is written to filesystem under linux

  - by bardiir

  How can i find out what processes write to a specific disc over time? In my particular case I got a little homeserver running 24/7 and I included a script in the crontab to shutdown all drives that are not used (no change in /proc/diskstats for 15 minutes). But my system disc won't come down at all. I'm suspecting logs but it's probably not only logs writing to the filesystem on the system disk and I don't want to go all the way moving the logfiles to something else just to find out the disc still doesn't spin down and there's nothing i can do against it.

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• Recover Bios HP DV9700T windows 7 64

  - by petebob796

  I downloaded the latest DV9700t bios (.59) and ran the update tool in windows 7 64. This seemed to go ok and did the usual system will shutdown in 10 seconds dialog. Updon the reboot nothing happens I get no BIOS screen or anything so I think the bios update went wrong. Which I am annoyed about I have never known a bios update to fail before and lots of people on the internet seem to have had the same problem with the same model. There is a way to recover apparently using crisdisk utility and creating a bootable usb key then holding win+b at power on, unfortunately the utility to make the disk doesn't seem to work in 64 bit versions of windows, the only type I have easy access to. Anyone know a way to create the boot disk in 64?

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• VMWare workstation: guest OS becomes sluggish after being idle for 12+ hours?

  - by GenEric35

  Hi, My VM becomes sluggish after a few hours(~12 hours or so) of being idle, there is no impact on the host, just the gueste. The guest OS becomes sluggish. It has lots of RAM, runs on Raid 0, quad core i5 750, everything is defragged, but the only way I found to keep it's responsiveness optimal is to shutdown(dumps the memory) and the start; a restart of the guest OS doesnt dump the memory so I need to be able to do a stop of the VM, and then a start. Coming from Hyper-V I had to learn VMWare and after a few months of fine tunning it I'm quite impressed with how configurable VMWare is. This is the only small issue I haven't been able to fix, has anyone encountered this?

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• Commands not working in Windows 7 32-bit command prompt

  - by Precious Tijesunimi

  I have an HP laptop with a Windows 7 32-bit Home Premium operating system. My command prompt doesn't run lots of commands like help, shutdown, ipconfig, ping, etc. I get a message like: 'help' is not recognized as an internal or external command, operable program or batch file. Only simple commands like cd and dir are working. I noticed that whenever I navigate to c:/windows/system32, the command works. But I need to run some important commands like java on a file that is on the desktop and not in the system32 folder. How can I fix this?

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• Rebooting an EC2 Instance

  - by ABrown

  I'm working on a project involving EC2 and I'm having a difficult time wrapping my head around this concept. With EC2 instances, will non-EBS backed volumes (standard EC2) survive a reboot of the OS? For example, I have an Ubuntu instance. If I type "/sbin/shutdown -r now", will I lose all data on the drive not in the AMI? I understand that if I terminate the instance via the tools or the control panel, I lose everything, but I can't find a concrete answer to the restart issue. An extra gold star goes to anyone who can link to documentation clearly explaining this. ;) Thanks for your time!

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• Tracking my home IP from anywhere on the internet?

  - by oKtosiTe

  I have an ISP that serves semi-permanent IPv4 addresses. They can't promise fixed IP addresses, but unexpected changes are quite rare. This begs me to ask however: what would be the easiest/most reliable way to track my home IP address so I can access my (Windows 7) home server even in the case of an address change? Please note: for reasons that I don't want to go in to, I'd like to avoid using any "dynamic DNS" type services. Instead I'd prefer some way to perhaps have the home server leave an occasional/triggered "address stamp" on a remote, off-site server (by SSH, HTTP post or similar, preferably over an encrypted connection).

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• Is the sql backend right choice for LDAP?

  - by skomak

  Hi, I have felt some troubles with LDAP dif database after unexpected system reboots. This databse was only read so it is confused why database have had errors. So im searching for replacement of this database. I think SQL would be more reliable. What do you think, is it? I need to know how much performance loss i'll meet then. How many more IOPS(I/O per second) in percentage I loss too. Thanks in advance, skomak

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• Windows 2008 startup script will not run?

  - by larsks

  I am trying to get a very simple batch script to run when my Windows 2008 Server (R2) system starts up. I have added the script to the "Startup Scripts" in the local group policy by running gpedit.msc, and I see the script listed under Windows Settings/Scripts (Startup/Shutdown)/Startup when I run rsop.msc, but the script is not being executed. The "Last Executed" column in rsop is empty even after a reboot, and a file that should be created by the script is never created. At the moment, the entire contents of the script are: rem Check if this script is running. date /t > c:\temp\flag The target directory (c:\temp) exists. The script is called c:\scripts\startup.bat, and works fine if I run it by hand.

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• Close lid option "Do nothing" absent

  - by Jaap

  I just unpacked my new Sony Vaio, with windows 8 pro installed. Everything is nice, so I tried setting my power management options. The "When I close the lid" option only list: Hibernate Sleep Shutdown The "Do nothing" option is not present. I've seen loads of stuff on google where people ask or explain how to set this option to "Do nothing", but in all my power plans this option is absent... Can I use a tool to prevent this, or is there a way to force windows to show me this option (and that it actually works)? UPDATE powercf /q guid gives me this output: Subgroup GUID: 4f971e89-eebd-4455-a8de-9e59040e7347 (Power buttons and lid) GUID Alias: SUB_BUTTONS Power Setting GUID: 5ca83367-6e45-459f-a27b-476b1d01c936 (Lid close action) GUID Alias: LIDACTION Possible Setting Index: 000 Possible Setting Friendly Name: Sleep Possible Setting Index: 001 Possible Setting Friendly Name: Hibernate Possible Setting Index: 002 Possible Setting Friendly Name: Shut down Current AC Power Setting Index: 0x00000000 Current DC Power Setting Index: 0x00000000 Other sections have different enumerations where 000 stands for No action

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• unable to kill process / logout on windows server 2003

  - by vitalik

  My own console .net application stuck in a "ghost" stage. It just shows a window that i can't close. It doesn't show up as a process in the task manager. when i try to "find windows process" using Process Explorer (from sysinternals) it says there is no process that owns that window or something like that. The problem is that it doesn't allow me to logout or reboot the server (remotely) because logoff process keeps waiting on that window to close. shutdown /r /f also is stuck waiting for it. I can probably have somebody go an reboot the server but i'd like to know if there is a way to close that process, close that session or force logout remotely. This is windows server 2003, but i had the same issue on XP just a few days ago.

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• Schedules Folder Backup

  - by Junaid Saeed

  i have some folders in C drive on which i work on daily basis and the data in them is very critical.. so every night when i shutdown my PC i copy - paste - overwrite existing files these folders to a separate location... so that of the system crashed or something bad happens.. i will be able to easily format C and all i cannot move these folders from C drive because these folders include C:\wamp\www\ of WAMP server and such folders... is there a tool on which i can schedule that everyday at X time these folders will be backuped to 'Y' path

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• Mint 13 does nothing when laptop lid is closed

  - by ewok

  I have a laptop running Mint 13. I have it hooked up to a 30" monitor and have no use for the laptop being open, so I put it on a shelf and close it. When I do that, the monitor goes blank. The power manager does not have an option for doing nothing when the lid is closed. The options are "Blank Screen", "Suspend", and "Shutdown". Is there a way to make the laptop not go to a blank screen when the lid is closed?

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