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• How well will ntpd work when the latency is highly variable?

  - by JP Anderson

  I have an application where we are using some non-standard networking equipment (cannot be changed) that goes into a dormant state between traffic bursts. The network latency is very high for the first packet since it's essentially waking the system, waiting for it to reconnect, and then making the first round-trip. Subsequent messages (provided they are within the next minute or so) are much faster, but still highly-latent. A typical set of pings will look like 2500ms, 900ms, 880ms, 885ms, 900ms, 890ms, etc. Given that NTP uses several round trips before computing the offset, how well can I expect ntpd to work over this kind of link? Will the initially slow first round trip be ignored based on the much different (and faster) following messages to/from the ntp server? Thanks and Regards.

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• Disk boot failure, insert system disk and press Enter.

  - by torbengb

  Similar to this related question, I came home and found that my media center pc showed this message, Disk boot failure, insert system disk and press Enter Before I do anything with the (defective?) harddisk, what are the best first steps I can take to fix this with a minimum of damage? Normally the machine (Win Vista) is always on and never reboots by itself (Windows auto-updates are disabled too). Something must have caused it to reboot, though I'm sure we didn't have a power outage. The machine can't reboot on that disk, but it will boot on another disk I just plugged in for testing. I haven't changed anything, or even touched the machine, for several days, and it has been running fine until now. I did replace the power supply some weeks ago, because the old one suddenly stopped working. It has been working fine with the replacement PSU.

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• IIS7, different ports for websites but no portnumber in the browser

  - by Queensheep

  I have a windows server 2008 with IIS7 with 4 websites. In DNS I have 4 different URLs which point to the IP of the server. I configured each web site with the site bindings: website1: hostname: url1, port: 80, IP-Adresse: the adress of the server website2: hostname: url2, port: 80, IP-Adresse: the adress of the server The result is, that from the client, I can browse with all the 4 URLs to the specified web sites and everything is fine. Then I changed in IIS the port of the websites, so that website1 now uses port 8080, website2 uses port 8081, and so on. Now I have to use the browser with the url and the portnumber (like URL:8080). Is there a possibility, to configured the websites with different portnumbers but not to use the portnumbers in the browser?

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• an unknown ip on network

  - by Ahmed safan

  In our office we have many PCs, all of them have static IP addresses. We had a problem with one server with ip 192.168.1.10 dropping off the network occasionally. I unplugged the network cable from the server and from pinged 192.168.1.10 from another host and there was a response. I searched all PCs to see if any has such ip but i didn't found a one. I changed the server ip to fix the problem, but I still find this rogue device using 192.168.1.10 on the network -- how can I figure out what it is? Could it be the ip of virtual machine on someone's PC?

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• Problem with Windows activation on a VM (Virtual machine)

  - by Daisetsu

  I backed up a number of laptops to virtual machines before they are to be re-purposed, in case I need the data at some later time. While the Physical to VM processes worked fine I am encountering issues on some of the VMs. When I boot them I get an error message saying I MUST activate windows in order to login. This is expected because the hardware changed (from physical hardware to virtualized hardware). I click the OK button and expect to be prompted with ways to activate, windows sits there for quite a while then tells me that "Windows has already been activated". I click OK at that message and get take back to the beginning where I am asked to activate Windows. I have done some fairly intensive googling but haven't been able to find a real solution. EDIT: The laptops with the issues are 2 Sony Vaios, I believe that they have the OEM version of the OS originally installed by the factory.

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• Cannot see main user profile directory on old vista hdd on win7

  - by chaoskreator

  I have an old laptop HDD that ran Vista that I need to get some pictures and movies off of. I've attached it via SATA cable to my new Win 7 (64 bit) machine and it mounts fine, except I can't see the main user profile in the D:\Users directory. I've changed ownership and permissions for the D: drive to my C:\ Username but still no luck. I read something about it being caused by the UAC being active on the Vista machine. Is this true? Is there a way to disable this and gain access to the main profile without putting it back into the old laptop (it's fried and won't boot)?

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• Percona MySQL 5.5 fails to start

  - by keymone

  trying to setup new server here but keep getting this in error log: mysqld_safe Starting mysqld daemon with databases from /data/mysql/myisam [Warning] Can't create test file /data/mysql/myisam/hostname.lower-test [Warning] Can't create test file /data/mysql/myisam/hostname.lower-test [Note] Flashcache bypass: disabled [Note] Flashcache setup error is : setmntent failed /usr/sbin/mysqld: File '/var/mysql/bin/bin-log.index' not found (Errcode: 13) [ERROR] Aborting [Note] /usr/sbin/mysqld: Shutdown complete mysqld_safe mysqld from pid file /var/run/mysqld/mysqld.pid ended everything under /data/mysql (it's ibdata and myisam folders) is owned my mysql:mysql and has proper permissions same goes for folders with bin and relay logs under /var/mysql apparmor is purged from server any ideas? PS it seems like something else apart from apparmor is affecting permissions to access mysql files after i changed data directory to more default one - /var/lib/mysql and "Can't create test file" error is gone, but "'/var/mysql/bin/bin-log.index' not found (Errcode: 13)" is still there PPS so i installed apparmor back and added all folders to mysqld's profile and errors mentioned above are now gone(or mysql doesn't even get to that point now) what i have now is this: /usr/sbin/mysqld: error while loading shared libraries: libpthread.so.0: cannot open shared object file: No such file or directory banging my head against the wall.

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• Caching of path environment variable on windows?

  - by jwir3

  I'm assisting one of our testers in troubleshooting a configuration problem on a Windows XP SP3 system. Our application uses an environment variable, called APP_HOME, to refer to the directory where our application is installed. When the application is installed, we utilize the following environment variables: APP_HOME = C:\application\ PATH = %PATH%;%APP_HOME%bin Now, the problem comes in that she's working with multiple versions of the same application. So, in order to switch between version 7.0 and 8.1, for example, she might use: APP_HOME = C:\application_7.0\ (for 7.0) and then change it to: APP_HOME = C:\application_8.1\ (for 8.1) The problem is that once this change is made, the PATH environment variable apparently still is looking at the old expansion of the APP_HOME variable. So, for example, after she has changed APP_HOME, PATH still refers to the 7.0 bin directory. Any thoughts on why this might be happening? It looks to me like the PATH variable is caching the expansion of the APP_HOME environment variable. Is there any way to turn this behavior off?

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• How to change font/number/bullet format for the whole list

  - by Nam Gi VU

  Hi, Let's look at a sample word 2010 file here. In this file you can see that the first group of text has their indent modified. The 2nd, 3rd group keep their default format. I want to apply the changed I've made in the group 1st so group 2nd and 3rd and for the new group I'm going to add instead of recieving the default indent. How can I do that? ps. Currently what I have to do is quite boring: Copy group 1 and paste to create new group to get the formatted, then remove the old text, adding new text :(

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• How to configure a gateway virtual machine

  - by user225706

  I have a VM-host configured with eth0 (10.145.73.207) and eth1(192.168.101.231), and three VMs connecting the Internet through NAT, with the default gateway of 192.168.122.1. Now I want to configure VM2 as a gateway. I added eth0 (192.168.122.63) and eth1 (172.16.1.109) for VM2. It can connect to the Internet with each of them. I changed the default gateway of VM1 from 192.168.122.1 to 192.168.122.63. However, when I traceroute google.com on VM1, it shows that the packet only reaches 192.168.122.63, no further. Any help is appreciated. Thanks.

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• (Apache) Weird characters with Roundcube (PHP)

  - by thonixx

  Yes, i saw all the questions about the weird characters at the end of a PHP script. I will ask here because no solution from the internet and serverfault worked. At this page: https://webmail.pixelwolf.ch/test/ there are some mysterious characters. And that's the problem why my Roundcube does not work. What I already checked and tried: 1. added AddDefaultCharset UTF-8 2. changed to AddDefaultCharset to ISO xxx (dont know the string right now) 3. php5filter disabled 4. gzip checked (according to php returns junk characters at end of everything) but characters remain there For notice: on my local server there aren't any of those characters. On local it just works. So what can I check further?

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• Syntax error in apc.ini: unexpected '='

  - by Ashley

  I installed APC on Ubuntu 10.04 and it seems to be working fine but I'm seeing this error in my Apache error.log: PHP: syntax error, unexpected '=' in /etc/php5/apache2/conf.d/apc.ini on line 2 The contents of the file are: cat /etc/php5/apache2/conf.d/apc.ini extension=apc.so apc.enabled="1" apc.shm_segments="1" apc.shm_size="192" apc.num_files_hint="1024" And I have also tried it without the quotes (") around the values and get the same error. I've looked at loads of the tutorials on installing APC that mention apc.ini and they all seem to use one of the two syntax formats I have tried. I'd appreciate any ideas. Update: This still causes it: cat /etc/php5/apache2/conf.d/apc.ini extension='apc.so' apc.enabled='1' apc.shm_segments='1' apc.shm_size='192' apc.num_files_hint='1024' I changed to: cat /etc/php5/apache2/conf.d/apc.ini extension=apc.so and it still happens (there's no line 2 in the file now!) I'm assuming a /etc/init.d/apache2 reload will be sufficient to read the new config, is that my mistake?

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• At what year in history was computers first used to store porn? [closed]

  - by Emil H

  Of course this sounds like a joke question, but it's meant seriously. I remember being told by an old system administrator back in the early nineties about people asking about good FTPs for porn, and that they would as a joke always tell them to connect to 127.0.0.1. They would come back saying that there was a lot of porn at that address, but that oddly enough it seemed like they already had it all. Point being, it seems like it's been around for quite a while. Anyway. Considering that a considerable portion of the internet is devoted to porn these days, it would be interesting to know if someone has any kind of idea as to when and where the phenomena first arose? There must be some mention of this in old hacker folk lore? (Changed to CW to emphasize that this isn't about rep, but about genuine curiousity. :)

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• Internet connection sharing: Ubuntu 9.10 Server on Windows 7 and VMWare

  - by avesse

  I'm trying to get Internet Connection Sharing (ICS) working between my Windows 7 RTM host and a Ubuntu 9.10 Server running on VMWare Workstation 6.5, but I have not been able to get it right. Here's what I have done: Configured VMWare to use Host Only networking (I tried NAT as well). Enabled ICS on my host's network connection, allowing VMnet1. After enabling it, Windows informed me that its VMnet1 IP has changed to 192.168.137.1. So in VMWare's Virtual Network Editor I configured VMnet1: Subnet 192.168.137.0 Mask 255.255.255.0 I did the same for DHCP. For NAT i set 192.168.137.1 as Gateway. I cannot ping any sites or get access through apt-get/aptitude install/update, although domains do get resolved to IPs. I have also tried using a static IP in Ubuntu. I don't know if it makes a difference, but my external IP is locked to my host's MAC address.

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• Any way to stop VMWare workstation from dropping SSH connections?

  - by oljones

  I have VMWare workstation 8 with a few Linux guests. I have had problems maintaining an active SSH connection to my VMs when they are in bridged mode. I first read that the onboard realtek network cards were not well supported so I bought a Intel Pro/1000 GT card. This supposedly had support. But this made no difference. Connections via SSH are active for about the first 3 minutes then hang and die. I have changed the TCP Checksum offload on the Intel and Realtek NICs, but this only works some of the time and even then not for very long. The best I could do was about 20 minutes before the connection was dropped. Any ideas?

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• __modver_version_show undefined error when building linux kernel 3.0.4 version

  - by Jie Liu

  I tried to build the linux kernel 3.0.4 on ubuntu 11.10 in virtualbox. Here are my steps: Download the source code tar xjvf linux-source-3.0.0.tar.bz2 cd linux-source-3.0.0 make menuconfig, changed nothing but used the default config and save to .config make Actually I think it should be 3.0.4 because from the Makefile I could see VERSION = 3 PATCHLEVEL = 0 SUBLEVEL = 4 EXTRAVERSION = Then at stage 2 which is to make modules, an error happened: ERROR: "__modver_version_show" [drivers/staging/rts5139/rts5139.ko] undefined! make[1]: *** [__modpost] Error 1 make: *** [modules] Error 2 Perhaps because 3.0.4 is a new release so that I can not find any same problem asked nor any solution to it.

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• "Show hidden files" option is not working

  - by crazygamer

  OK, I know this is the very basic thing that goes with Windows, but I am asking it here in search of answer. I put my pendrive and it autoruns. This changed the show hidden files option off, I mean I am not able to see my hidden files as it is not applying the changes. What is the registry file that has modified? I have scanned my computer using 4 antivirus programs. BitDefender found and deleted something in temperary folder. The rest didn't showed anything. I have encountered this problem a few more times but this time I don't want to format it ;-)

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• Multiple gcc on Mac OS X

  - by snihalani

  I did a port install for gcc version 4.7.1 (MacPorts gcc47 4.7.1_2) I named the executable as g+ and placed it in one my $PATH. I use gcc 4.7.1 when I need c++11 standard. I haven't changed the original g++ so as not messup XCode. I am using eclipse-cdt and running the make all from the window. It's giving me: 20:12:40 **** Build of configuration Default for project 2804-hw2 **** make all g+ -c -Wall -std=c++11 main.cpp -o main.o make: g+: No such file or directory make: *** [main.o] Error 1 20:12:40 Build Finished (took 89ms) Here is my makefile CC=g+ CFLAGS=-c -Wall -std=c++11 LDFLAGS= SOURCES=main.cpp Vector3D.cpp OBJECTS=$(SOURCES:.cpp=.o) EXECUTABLE=exec all: $(SOURCES) $(EXECUTABLE) $(EXECUTABLE): $(OBJECTS) $(CC) $(LDFLAGS) $(OBJECTS) -o $@ .cpp.o: $(CC) $(CFLAGS) $< -o $@ clean: rm $(EXECUTABLE) $(OBJECTS) How do I make eclipse detect my g+?

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• On boot firmware request for intel GMA 3100 chipset timing out

  - by Yannick M.

  I am currently in the process of installing a Gentoo linux box with a Vanilla 2.6.29-r5 kernel with gentoo-xen-kernel patches in order to run the Xen Hypervisor. After rebooting with the new kernel, the booting process seemed to hang on: [ 0.863005] platform microcode: firmware: requesting intel-ucode/06-0f-07 [ 60.863442] Microcode Update Driver: v2.00-xen <[email protected]>, Peter Oruba Apparently the firmware request times out after 60 seconds (/sys/class/firmware/timeout) and booting just continues. I have done some research and have found that on RHEL-4 this problem was related to the mount of /sys changed and the firmware.agent hotplug script couldn't parse the line correctly. However I am having some difficulty tracking down how to fix this on Gentoo. Any and all ideas are greatly appreciated! Thanks

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• htaccess Redirect / RedirectMatch with URLs that contain Special / Encoded Characters

  - by dSquared

  I'm currently in the process of applying a variety of 301 redirects in an .htaccess file for a website that recently changed its structure. Everything is working as expected, except for URLs that contain special characters, for these I am getting 404 errors. For example the following directives that have a registered trademark symbol (®) bring up 404 pages: RedirectMatch 301 ^/directory/link-with®-special-character(/)?$ somelink.com RedirectMatch 301 ^/directory/link-with%c2%ae-special-character(/)?$ somelink.com I've also tried using Redirect, RewriteRule and surrounding the urls with double quotes and nothing seems to work. Does anyone know what might be happening or the proper way to handle these types of directives? Any help is greatly appreciated.

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• rsync error: some files/attrs were not transferred

  - by Daniel Ball

  Using rsync(ubuntu) and a DeltaCopy server on W2K3 to back up some of the data on the file server before I migrate from W2K3 to Ubuntu server. After it completed I ran a dry run just in case something had been missed or changed ... I got the following: sudo rsync -az -n 198.3.9.25::Music /mnt/raid/music [sudo] password for daniel: file has vanished: "?????\#267????" (in Music) file has vanished: "????????" (in Music) ... rsync error: some files/attrs were not transferred (see previous errors) (code 23) at main.c(1526) [generator=3.0.7] I just want to make sure I'm reading it right, that somehow there are files on the receiving end that aren't on the sending?

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• SQLServer 2008 Fails to start under NT AUTHORITY/NETWORK SERVICE account

  - by braincells2pixels

  Not sure what changed but looks like my security credentials have been monkeyed with. Since yesterday evening after I disconnected from our corporate network and rebooted my laptop at home, I am unable to start the instance of SQL2K8. The service is set to run under NT AUTHORITY\NETWORK SERVICE account. The event log records an Access Denied error on the Master.mdf. Switching the account to Local System starts the service but our application runs into security errors. Any clues? TIA

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• 'inode table usage' spiking every morning at 8am

  - by Harry Wood

  I installed munin on my ubuntu server. It's showing my 'inode table usage' spiking every morning at 8am. It then rapidly curves down and settles over the course of several hours. What might cause this? I thought it might be something running in /etc/cron.daily but this was set to run at 6a.m. and I've changed it to 4am. The spike remains at 8am. I also enabled cron logging, but can't see anything getting launched at 8a.m. It's a virtual server hosted by memset. Could it be caused by something happening on the virtual host?

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• Virtualmin Configuration

  - by Allen

  I am trying to get Virtualmin setup and have reached a point where my noobish sysadmin skills aren't getting the job done. This is the message I get now when I try and refresh the configuration of Virtualmin. BIND DNS server is installed, and the system is configured to use it. However, the default master DNS server XXXXXX is not a fully qualified domain name. Sendmail is only accepting SMTP connections on the following ports : 127.0.0.1 port smtp. Email from other systems on the Internet will not be accepted. This can be changed in the Sendmail Mail Server module. Please advise what I need to do to get Sendmail configured properly. Thanks!

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• Tweaks on nvidia-settings only working when the program is opened

  - by Igoru

  I have two monitors. The master one (17") is 1yo, and the secondary (15") is really old, like 4yo. This old screen is having problems displaying colors... They are a little bit darker, what is a problem when I'm viewing pics. I have a GeForce 9800, so I changed some settings inside nvidia-settings, that fit better with this second screen. But those settings just are applied when I first open nvidia-settings. First time I configured this, it worked. I turned off computer, next day turned it on, and screen is dark again. As soon as I open nvidia-settings again, the screens get lighter again! How can I make those settings permanent and loaded at startup?

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