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• No clue for high load average on top

  - by Oz.

  We have several machines on Amazon (ec2) of the type c1.xlarge with 16 cpus, running the Amazon AMI. Details on the machine: 7 GB of memory 20 EC2 Compute Units (8 virtual cores with 2.5 EC2 Compute Units each) 1690 GB of instance storage 64-bit platform I/O Performance: High API name: c1.xlarge One out of the several machines is showing a high load average, since we have run the last yum upgrade a couple of weeks a go. We did not yet update the other machines, and everything looks normal on them. The strange thing is that the top command not showing any hint for the cause of the load. CPUs are 4.8%us, 1.1%sy, 0.0%ni, 94.1%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st(see below). Mem is about 1.5GB free. Any idea what could it be, or where else can we check? Many thanks for the help. # # top # top - 07:57:42 up 4:18, 1 user, load average: 1.36, 1.45, 1.47 Tasks: 131 total, 1 running, 130 sleeping, 0 stopped, 0 zombie Cpu(s): 4.8%us, 1.1%sy, 0.0%ni, 94.1%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 7120092k total, 5644920k used, 1475172k free, 532888k buffers Swap: 0k total, 0k used, 0k free, 3463936k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 1557 mysql 20 0 1829m 374m 6448 S 14.3 5.4 11:15.09 mysqld 6655 apache 20 0 416m 49m 3744 S 9.3 0.7 0:04.85 httpd 27683 apache 20 0 421m 54m 3708 S 9.0 0.8 0:00.99 httpd 6682 apache 20 0 424m 57m 3788 S 8.3 0.8 0:03.81 httpd 16816 apache 20 0 419m 51m 3760 S 4.3 0.7 0:04.09 httpd 22182 apache 20 0 417m 50m 3756 S 1.7 0.7 0:06.34 httpd 219 root 20 0 0 0 0 S 0.3 0.0 0:00.34 kworker/7:1 699 root 20 0 0 0 0 S 0.3 0.0 0:00.40 kworker/3:1 1 root 20 0 19376 1508 1212 S 0.0 0.0 0:00.29 init 2 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kthreadd 3 root 20 0 0 0 0 S 0.0 0.0 0:00.71 ksoftirqd/0

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• Translating IPTables rule to UFW

  - by Dario Fumagalli

  we are using an Ubuntu 12.04 x64 LTS VPS. Firewall being used is UFW. I have setup a Varnish + LEMP setup. along with other things, including an Openswan IPSEC VPN from our office to the VPS data center. A second in house Ubuntu box is to act as MySQL slave and fetch data from the VPS through the VPN. Master's ppp0 is seen as 10.1.2.1 from the slave, they ping etc. I have done the various required tasks but I can't get the client (slave) MySQL (nor telnet 10.1.2.1 3306) to access the master through the VPN unless I issue this fairly obvious IPTables command: iptables -A INPUT -s 10.1.2.0/24 -p tcp --dport 3306 -j ACCEPT I willingly forced the accepted input to come from the last octet. With this rule everything works just fine! However I want to translate this command to UFW syntax so to keep everything in one place. Now I admit being inexperienced with UFW, I prepared rules like: ufw allow proto tcp from 10.1.2.0/24 port mysql and 2-3 variations involving specifying 3306 instead of mysql, specifying a target IP (MySQL's my.cnf at the moment is configured as 0.0.0.0) and similar but I just don't seem to be able to replicate the simple iptables rule in a functional way. Anyone could kindly give me a suggestion that is not to dump UFW? Thanks in advance.

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• How can I cornify a SharePoint site?

  - by Chris Farmer

  Inspired by the April 1 gravatar changes and the memory of last year's cornification of Stack Overflow, I wanted to add a cornify button to my company's SharePoint app. I just added their html snippet to a Content Editor Web Part. <a href="http://www.cornify.com" onclick="cornify_add();return false;"> <img src="http://www.cornify.com/assets/cornifycorn.gif" width="52" height="51" border="0" alt="Cornify" /> </a><script type="text/javascript" src="http://www.cornify.com/js/cornify.js"></script> The button renders all glittery and beautiful, and the magical functionality works fine in Chrome and Firefox (I'm on Windows 7) for me. But, in IE8, all the gorgeous unicorn images get added at the bottom of the page such that you can't see them unless you scroll down. Since most of our users are IE users, I fear that this just isn't going to be all that much fun. So, is there some known way to force this to work better in IE8, or is there another similarly fun site adornment utility that I could use that might behave better in a SharePoint 2007 app running in IE7/8?

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• Compress a folder of PDF files into separate zip archives

  - by Panrubius

  I wanted to take a folder full of PDF files and create a number of separate zip files, after following the advice on this question everything worked *almost*perfectly. Here's what happened: When I issued this command in Terminal: zip -s 5m -r ~/Desktop/invoices ~/Desktop/Invoices/ Everything worked really well, in that I got 11 ZIP files of approximately 5 MB each; placed in the folder specified. However, the files they outputted were named as follows: invoices.z01 invoices.z02 invoices.z03 invoices.z04 invoices.z05 invoices.z06 invoices.z07 invoices.z08 invoices.z09 invoices.z10 invoices.zip So as you can see only invoices.zip has been named correctly. I could go through and rename them one by one, but seriously, if we start doing that then what in the name of Evolution are computers for?! Now, I am also aware that I'm relatively new to the Terminal; so I could be making a very silly mistake somewhere. If that's the case, please be patient :-) Any help would be greatly appreciated. One last note: I'm quadriplegic so I would like to avoid GUI applications as much as possible, I use voice recognition software you see this working in the Terminal is much much easier.

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• Word 2003 will not show up in Windows 7

  - by invadersil

  I just installed Windows 7 over the holiday and it went swimmingly well. Today I finished up a few things like installed MS Office 2003. That went well too, until I tried to open up Word. When I try to open up Word on its own, it comes up in the application bar but the application window does not show. I use Word as the editor in Outlook which does work. I also discovered that I can start it up in safe mode and it will work normally. But normal startup just doesn't show me anything. Oddly, if I start typing stuff while the app is selected in the app bar and then try to close it, it pops up a message asking if I want to save it. I tried running the compatibility utility within Windows 7 but still no dice. Has anybody seen this issue yet? The other Office apps start normally. Edit: More info: Windows 7 Pro 64-bit. Office is patched up to SP3. And last time I checked, there were no updates either (and fully updated with KBs after SP3) And I did a fresh install of Windows 7.

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• Getting SMB file shares working over a PPTP VPN

  - by Ben Scott

  I'm having issues getting SMB file shares working over a PPTP VPN. The server setup consists of a security device (DrayTek V3300) which passes the PPTP authentication to a SBS2003 server running RRAS. The server is the DC and provides DNS and WINS, the single NIC's name server is set to 127.0.0.1, and DHCP on the DrayTek sets the server IP as the DNS. If I create a new VPN connection in Win7, leaving everything as default apart from the server, username, password and domain, I can: ping everything by IP address resolve IPs with nslookup using their fully-qualified name, as in nslookup fileserver.mydomain.local ping machines by fully-qualified name, as in ping fileserver.mydomain.local However if I try to access a file share: within Explorer, I get "Windows cannot access ..." with "Error code: 0x80004005 Unspecified Error", using net use z: \\fileserver.mydomain.local\share, I get "System error 53 has occurred. The network path was not found." If I add the machine name to my HOSTS file I can use the file share, which is my last-ditch workaround, but I have a number of VPN users and would rather a solution that doesn't involve me trying to hand-edit system files on computers half a country away. If I set the WINS server explicitly in the connection's IPv4 settings I don't have to use the FQN to ping the machine, but that doesn't change anything else.

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• Windows 7 fails to connect to the internet a few minutes after startup

  - by SageTheGreat

  Problem Earlier today, when I turned on my desktop computer, my internet connection works fine. Cryptocurrency miners connecting and hashing as usual and I can browse websites. But after a few minutes, my miner fails indicating that there is something wrong with my internet connection. Tried refreshing my browser and is stuck at "resolving host", and then presented me an error. After that, i can't browse sites anymore. But the weird thing is that the network icon in Windows 7 shows no signs of problems. Solutions Made Restarted my computer without doing anything: Problem persists. Tried using the network troubleshooter of windows: Reported no problems Stopped bonjour still no progress. Loaded windows using Last good config: still no progress. Restarted Modem: No change. Current Status I currently did a system restore to my system to a point before installing the latest update from Microsoft. Because earlier today, I installed some updates and after that, the problem started to appear. (After system restore, same problem.) Latest Programs installed before the problem MS Visual Studio 2013 (but internet still worked fine after the install). I hope someone could provide answers on this problem. It is my first time encountering this. EDIT: Additional Info OS: Windows 7 SP1 64-bit AV: Avast Free Antivirus Internet Connection Type: Ethernet It appears that my Laptop can't even connect to the machine thru Remote Desktop My laptop and phone on WiFi works fine and can connect to the internet. EDIT 2: Whenever I boot into Safe Mode, my Internet is fine.

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• Apache error "child pid XXXX exit signal exceeded file size limit (25)"

  - by Stephen Melrose

  Morning all, Apache on our internal development server stopped working last night. It's running, but all we get is a blank screen, no server errors. Examing the error log shows the following, [Fri Apr 23 09:13:57 2010] [notice] child pid XXXX exit signal exceeded file size limit (25) [Fri Apr 23 09:14:03 2010] [notice] child pid XXXX exit signal exceeded file size limit (25) [Fri Apr 23 09:14:03 2010] [notice] child pid XXXX exit signal exceeded file size limit (25) [Fri Apr 23 09:14:06 2010] [notice] child pid XXXX exit signal exceeded file size limit (25) After some Googling, we found that this is due to Apache trying to handle a file greater than it's maximum allowed limit, which by default is 2GB and is usually an error log. I did a search using find . -size +1000000k -ls (find all files greater than 1GB) in our log and web folders, but nothing showed up. I've also restarted Apache and rebooted the server itself serveral times. I've completely wiped the log folder and started a fresh. Nothing is working. Any ideas as to what else might be causing this? Thank you

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• Membership in two domains

  - by imagodei

  Hello! I would your suggestions for an effective solution for a person, who needs to access resources in two Windows domains and wants to use one computer. It's about our CEO, who has accepted a second position in another company. Accessing files and folders isn't big problem. The greatest challenge I see is that he wants to conveniently access Exchange accounts in both companies; he would like to send and receive mail in single Outlook if possible (two profiles?) There is also a challenge with calendars: he would like to have one calendar for all activities from both Exchange accounts. Creating a POP3 account for accessing second Exchange server is a last resort, because obviously there is a problem with scheduling meetings and other calendar related tasks. Forwarding and receiving all mail/tasks on primary Exchange server is inconvenient because simple replying to original sender is disabled; and also when manually changing the recepient, he will receive mail from the wrong address. We were considering Virtualisation, that is setting up an instance of virtual machine inside existing installation and then joining this virtual computer to a second domain. Then installing another MS Outlook. This would of course mean two different Outlook accounts, two different calendars, but would at least enable our CEO to access all information from a single laptop. Does anyone have any other idea? I know setting up two domains on a single computer is a no-go (without much hacking at least), but effective workarounds are appreciate. The thing I am looking here is high usage/efficiency/productivity, but also as elegant solution from the administration point of view. Thank you very much (if you managed to read this through, this is a good sign ^_^ )

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• a VPS mail server

  - by microspino

  Hello I'm trying to substitute citadel on my Virtual Private Server with something more simple. I dislike their documentation and the webmail client. I don't need any groupware feature. I need only an MTA with a nice looking web interface, SPAM and VIRUS check. I recently found the lamson project from Zed Shaw. Is that production ready? Do you had any real and good experience with It? On the latest-news page I see that the last release dates december 2009. Sorry for my lack of knowledge, I'm really new to mail servers but I have to find a solution to manage sending and receiving mail on my VPS. I would accept also to build my VPS email server using a linux system like exim, postfix or whatever but I have really small needs and they will not grow in at least a year and i will be the only one user. I'm searching for something that I could build and manage easily, as I'm a novice linux sysadmin. Having also some good documentation or at least a robust step by step guide would be a plus.

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• MicroSD card getting corrupted for no good reason

  - by ChaosR

  I recently bought an MicroSD card online. It's a Sandisk 16GB class 2. However, it has a nasty problem. Every time I fill it with my data, the fat tables get corrupted. I've tried reformatting it, blanking it, doesn't seem to solve the problem. I have tried windows and linux (ubuntu), both have the problem. I've used my usb microsd readers, and even tried putting it in my phone and putting data on it from there. All have this problem. Now the really odd thing is, besides the corrupted file tables, no programs can find anything wrong with the hardware. I've tried both chkdisk and "badblocks -w", neither give any type of error. Now I don't know if the actual data gets corrupted, or if its just filesystem tables. What happens is that one or more folders start showing a load of chinese-charred (random UTF8 symbols I suppose) folders and files, and it is impossible to do anything with those. All the other data (outside of the corrupted folders) seems fine. I've tried to test it, and the problem doesn't seem to show up until I fill the disk upto about 3~4GB. After that I can still access the data. But as soon as I eject/safely remove/unmount it, the bad things happen somehow. Next time I plug it in, the folders I most recently wrote to (but sometimes also the folders I wrote the time before last time to) are all gibberish. Does anybody have any clue what might be going on here? EDIT: It seems I can't even put ext3 or ext4 on it, they both complain about a corrupted journal. Gheh, guess something is really broken here.

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• Notebook Operating System with extreme support cycles/security updates

  - by leto

  Hello there, after reading the announcements about Mac OS X "Lion" and Apples political decision, I've had enough. I'm a longtime Apple User since 1992, have always felt at home there, but am trying to switch to alternative Operating System since a year. I've also been working with Unix machines since 2001, so I'm looking in one of the free Unices or a Linux. Since I last looked at the desktop in 2002 choke much has changed, it seems. So I'm lost once more in the war between desktop environments and software. To be honest: I don't care what it's name is, I want to get my job done. Here's what I set me as landmark for an operating system/software to be considered: Has to be atleast four years old Has to supply security updates for current release for atleast a year Production quality stability for the whole desktop environment (!) No f****g commercial stuff that tends to supply me with privacy invading App Store or Cloud space So far I'm running a MacBook from 2007, 4 Gig memory, 250 Gig disk and I need: IMAPs for Mail since 1995 Webbrowser sic Shell Keeping current with Updates/Upgrades with no more than 5 Minutes spent in entering commands (makes it hard for OpenBSD ;-) ) A desktop filemanger would be nice, but is a bonus. What can you suggest as operating system? The one with the longest support cycles and best chance to survive the next 10 years will win a new user, even sending patches when needed :-) Greets

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• What is the difference between disabling hibernation and idling time for a NAS?

  - by Gary M. Mugford

  I have two D-LINK DNS-323 NAS boxes with two Seagate drives in each. The first one is about a year old, the second one about three months. The first two on Monster are each 1.5T drives while the last two on Origami are 2T drives. I have never been overly happy with the Monster drives but, outside of poor throughput on small files, they have been consistently available to all programs after I put a batch file into my startup to do a directly listing of each. I added the two new drives when I added the Origami box. But, watching the dos box that comes up, I rarely see both listed before the box disappears. Other programs, backups, Belarc, even my file browsers, seem to have a dickens of a time seeing O: and P:. Finally, I decided to go into setup and turn off hibernation. Performance HAS been better since and Belarc, for instance, now sees both drives. At the time of poking around, I noticed an Idle Time feature too. What is the difference between the two settings? And for added points, how much trouble am I in for turning off hibernation? The super bonus round ... anything ELSE I should have done? Thanks in advance, GM

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• Is the APC BR700G UPS (or similar) compatible with Active PFC power supplies?

  - by David Zaslavsky

  I'm looking at getting a UPS for my home computer. So far the APC BR700G looks very promising, except for one thing: one of the reviews on Newegg says that this UPS does not work with a power supply with Active PFC. Pros: Unit looks great, built well, very heavy, was excited to use it. Cons: Didn't research enough - many newer power supplies like my corsair 750w (and yes dells and other mainstreamers sell them too) that I bought last year have a feature called active pfc (power factor corrected). The signal for this backup battery doesn't fully support that feature and can cause issues. You can find an article on APCs site if you search their user forums for PFC. And the power supply in my computer is, in fact, an Active PFC PSU. I've already found one answer on this site claiming that it's not an issue, that "most quality supplies these days have PFC and work just fine with a UPS." That disagrees with the review on Newegg. Can someone explain this discrepancy? Also, what is it exactly about a UPS that makes it incompatible with an Active PFC PSU? (if anything) Is there some way to tell based on the technical specifications, or do I just have to hunt for reviews online to avoid wasting my money? While any input would be appreciated, I would prefer to get an answer from someone with actual experience with similar UPS's and Active PFC power supplies, who can tell me whether it works or not.

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• Creating an ec2 image on amazon fails at mkfs.ext3

  - by Dave Orr

  I'm trying to create an image of my ec2 instance in Amazon's cloud. It's been a bit of an adventure so far. I did manage to install Amazon's ec2-api-tools, which was harder than it seemed like it should have been. Then I ran: ec2-bundle-vol -d /mnt -k pk-{key}.pem -c cert-{cert}.pem -u {uid} -s 1536 Which returned: Copying / into the image file /mnt/image... Excluding: /sys/kernel/debug /sys/kernel/security /sys /proc /dev/pts /dev /dev /media /mnt /proc /sys /etc/udev/rules.d/70-persistent-net.rules /etc/udev/rules.d/z25_persistent-net.rules /mnt/image /mnt/img-mnt 1+0 records in 1+0 records out 1048576 bytes (1.0 MB) copied, 0.00677357 s, 155 MB/s mkfs.ext3: option requires an argument -- 'L' Usage: mkfs.ext3 [-c|-l filename] [-b block-size] [-f fragment-size] [-i bytes-per-inode] [-I inode-size] [-J journal-options] [-G meta group size] [-N number-of-inodes] [-m reserved-blocks-percentage] [-o creator-os] [-g blocks-per-group] [-L volume-label] [-M last-mounted-directory] [-O feature[,...]] [-r fs-revision] [-E extended-option[,...]] [-T fs-type] [-U UUID] [-jnqvFKSV] device [blocks-count] ERROR: execution failed: "mkfs.ext3 -F /mnt/image -U 1c001580-9118-4a50-9a25-dcf02be6d25f -L " So mkfs.ext3 wants -L, which is a volume name. But ec2-bundle-vol doesn't seem to take in a volume name as an argument, and the docs (http://docs.amazonwebservices.com/AmazonEC2/gsg/2006-06-26/creating-an-image.html) don't seem to think one should be needed. Certainly their sample command: # ec2-bundle-vol -d /mnt -k ~root/pk-HKZYKTAIG2ECMXYIBH3HXV4ZBZQ55CLO.pem -u 495219933132 -s 1536 doesn't specify anything. So... any help? What am I missing?

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• When machine is turned on, only the fan runs

  - by Gopal

  Hi, I have an issue slightly similar to this one posted here, http://superuser.com/questions/127016/troubleshooting-monitor-never-turns-on-system-fans-running-dvd-rom-does-not-op My configuration is as follows: EPOX 9NPA+ Ultra motherboard AMD Athlon 64 CPU Corsair 2 x 1GB PC3200 DDR RAM 1 DVD RW drive and 1 CD ROM Drive SATA 250 GB Hard drive 400W Power supply EVGA 256MB graphics card I have had this configuration for about four years. Last month, I started having issues in starting the machine. It wouldn't start when I press the ON button in the front of the case. So I used to pull out the power cord and plug it back in and then switch on in the front, and it used to work fine. And then one fine day, when I plugged in the power cord at the back, even without switching on the power-on button at the front, I saw that the fan at the back was running. So I opened the system. Then I could see that all the fans inside were running. I replaced the power supply. No luck there. Then I replaced the CMOS battery. Again nothing improved. Even when I removed all the cards and memory, I still get one short beep. That's it. Any idea how to proceed on this? Anything else could be checked? I want to confirm if this is a motherboard failure, before proceeding to replace it.

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• Display with intel integrated graphics, bitcoin mine with Radeon 6950

  - by karategeek6

  I'm on Ubuntu Linux 11.04 64 bit. I have an intel i5 with integrated graphics and a Radeon 6950, with one monitor. I would like to run my graphics on the integrated card, and run bitcoin mining on the 6950. I have bitcoin mining working when I use the 6950 for both display and mining. Every time I try and and use the integrated graphics instead, OpenCL doesn't recognize my 6950. Using aticonfig --initial when using the integrated graphics for display breaks things. So I used the xorg.conf it created as a basis and tried to manually edit it. I really don't know what I'm doing, though. My last attempt is given below. The graphics ran off the integrated card, but the 6950 wasn't recognized. Any help would be greatly appreciated! xorg.conf: #Section "ServerLayout" # Identifier "Intel Layout" # Screen "Default Screen" # Identifier "aticonfig Layout" # Screen "aticonfig-Screen[0]-0" # Screen 0 "aticonfig-Screen[0]-0" 0 0 #EndSection Section "Module" Load "glx" EndSection # Intel Section "Device" Identifier "Intel Integrated Graphics" Driver "intel" BusID "PCI:0:2:0" EndSection Section "Monitor" Identifier "Default Monitor" Option "VendorName" "Monitor Vendor" Option "ModelName" "Monitor Name" Option "DPMS" "true" EndSection Section "Screen" Identifier "Default Screen" Device "Intel Integrated Graphics" Monitor "Default Monitor" DefaultDepth 24 EndSection # ATI Section "Device" Identifier "aticonfig-Device[0]-0" Driver "fglrx" BusID "PCI:1:0:0" EndSection Section "Monitor" Identifier "aticonfig-Monitor[0]-0" Option "VendorName" "ATI Proprietary Driver" Option "ModelName" "Generic Autodetecting Monitor" Option "DPMS" "true" EndSection Section "Screen" Identifier "aticonfig-Screen[0]-0" Device "aticonfig-Device[0]-0" Monitor "aticonfig-Monitor[0]-0" DefaultDepth 24 SubSection "Display" Viewport 0 0 Depth 24 EndSubSection EndSection

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• Why is the wrong name server information at crsnic.net & gtld-servers.net ?

  - by danorton

  Did I screw this up? I don’t even know how this might have happened, so I’d like to learn. I’m trying out HostGator’s reseller service and I bought a domain name through it, but I didn’t want the default name servers and so I changed them during the registration. After registration the domain name record is correct everywhere except at whois-servers.net and whois.crsnic.net and it looks like the DNS network is using that same information. $ whois -h whois.enom.com. example.com ... Name Servers: dns1.name-services.com dns2.name-services.com dns3.name-services.com dns4.name-services.com dns5.name-services.com ... $ whois -h whois.crsnic.net. example.com Domain Name: EXAMPLE.COM Registrar: ENOM, INC. Whois Server: whois.enom.com Referral URL: http://www.enom.com Name Server: NS1.HOSTGATOR.COM Name Server: NS2.HOSTGATOR.COM Status: clientTransferProhibited Updated Date: 01-jun-2010 Creation Date: 31-may-2010 Expiration Date: 31-may-2011 >>> Last update of whois database: Tue, 01 Jun 2010 19:20:47 UTC <<< ... $ dig +norecurse @b.gtld-servers.net. example.com. NS ... ;; AUTHORITY SECTION: example.com. 172763 IN NS ns2.hostgator.com. example.com. 172763 IN NS ns1.hostgator.com. ... My next step is to let HostGator have a look, but first I want to better understand how this happened. Thanks.

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• VMWare steals IP addresses

  - by Ishan Amin

  I'm having a peculiar problem, that I think I have narrowed down to VMware. For the past one year, every once in a while we lose internet connection and not all users (about 10 users) go down at the same time, its usually one-by-one. First someone will call me and say "Internet is down" and then we would go reset the router and modem and switch and it would be working again for a while, then go down again without any pattern or replicatable sequence. We'd go repeat the steps again to get everyone in the office running again. We called our Internet Service Provider and they constantly say, We see your modem and we see your router and from thier end everything is OK. we replaced our router and switch and modem, twice! Last friday, it dawned upon me, that everytime we turn on a VMware machine, this sequence of taking everyone down starts, which also explains the message that my users get for "IP Conflict Found" So we do alot of VMware testing and lo and behold, it takes my Internet down. My Yahoo and Gtalk would continue working but www is down when the VMware machines are started. I do use bridged networking to all the VMware machines, but I dont know what else to set it at. now, sorry for this long rambling but anyone have any clue on how to stop this? thanks IA

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• NGINX rewrite for vanity URLs when file doesn't exist (try_files and rewrite together)

  - by user1721724

  I'm trying to get vanity URLs on my server. If the file path from the URL doesn't exist, I want to rewrite the URL to profile.php, but if my users have periods in their usernames, their vanity URL doesn't work. Here is my conf block. server { listen 80; server_name www.example.com; rewrite ^/([a-zA-Z0-9-_]+)$ /profile.php?url=$1 last; root /var/www/html/example.com; error_page 404 = /404.php; location ~* \.(js|css|png|jpg|jpeg|gif|ico)$ { expires 1y; log_not_found off; } location ~ \.php$ { fastcgi_pass example_fast_cgi; fastcgi_index index.php; fastcgi_param SCRIPT_FILENAME /var/www/html/example.com$fastcgi_script_name; include fastcgi_params; } location / { index index.php index.html index.htm; } location ~ /\.ht { deny all; } location /404.php { internal; return 404; } } Any help would be appreciated. Thanks!

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• gcc built by crosstool-ng gives undefined reference

  - by netvope

  I've successfully built a toolchain using crosstool-ng with the default configuration named x86_64-unknown-linux-gnu. The documentation says: Using the toolchain is as simple as adding the toolchain's bin directory in your PATH, such as: export PATH="${PATH}:/your/toolchain/path/bin" and then using the target tuple to tell the build systems to use your toolchain: ./configure --target=your-target-tuple or make CC=your-target-tuple-gcc or make CROSS_COMPILE=your-target-tuple- and so on... I followed the instructions and attempted to build GNU tar (tar-1.25.tar.bz2) with the toolchain. The commands ./configure --target=x86_64-unknown-linux-gnu and make CROSS_COMPILE=x86_64-unknown-linux-gnu- do not work (the build will succeed, but it uses the host system's gcc). The command make CC=x86_64-unknown-linux-gnu-gcc works, but in the very last step when it tries to link, it returns errors like this: compare.o: In function `openat': /dev/shm/x-tools/x86_64-unknown-linux-gnu/x86_64-unknown-linux-gnu/sys-root/usr/include/bits/fcntl2.h:134: undefined reference to `__openat_2' What could be the problem? Was the toolchain not properly setup? Perhaps x86_64-unknown-linux-gnu-gcc is using the header files from the host system but could not find the libraries in the target's sys-root?

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• python reports socket in use, netstat and others claim its not

  - by captainmish

  We have a strange socket issue with a RHES3 box: Python 2.4.1 (#1, Jul 5 2005, 19:17:11) [GCC 3.2.3 20030502 (Red Hat Linux 3.2.3-52)] Type "help", "copyright", "credits" or "license" for more information. >>> import socket >>> s = socket.socket() >>> s.bind(('localhost',12351)) Traceback (most recent call last): File "<stdin>", line 1, in ? File "<string>", line 1, in bind socket.error: (98, 'Address already in use') This seems normal, lets see what has that socket: # netstat -untap | grep 12351 {no output} # grep 12351 /proc/net/tcp {no output} # lsof | grep 12351 {no output} # fuser -n tcp 12351 {no output, repeating the python test fails again} # nc localhost 12351 {no output} # nmap localhost 12351 {shows port closed} Other high ports work fine (eg 12352 works) Is there something magic about this port? Is there somewhere else I can look? Where does python find out that socket is in use that netstat doesnt know about? Any other way I can find out what/if that socket is?

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• iptables captive portal remove user

  - by Burgos

  I followed this guide: http://aryo.info/labs/captive-portal-using-php-and-iptables.html I am implementing captive portal using iptables. I've setup web server and iptables on linux router, and everything is working as it should. I can allow user to access internet with sudo iptables -I internet -t mangle -m mac --mac-source USER_MAC_ADDRESS -j RETURN and I can remove access with sudo iptables -D internet -t mangle -m mac --mac-source USER_MAC_ADDRESS -j RETURN However, on removal, user can still open last viewed page as many times he wants (if he restart his Ethernet adapter, future connections will be closed). On blog page I found a script /usr/sbin/conntrack -L \ |grep $1 \ |grep ESTAB \ |grep 'dport=80' \ |awk \ "{ system(\"conntrack -D --orig-src $1 --orig-dst \" \ substr(\$6,5) \" -p tcp --orig-port-src \" substr(\$7,7) \" \ --orig-port-dst 80\"); }" Which should remove their "redirection" connection track, as it is written, but when I execute that script, nothing happens - user still have access to that page. When I execute /usr/sbin/conntrack -L | grep USER_IP after executing script I am having nothing returned, so my questions: Is there anything else that can help me clean these track? Obviously - I can't reset nor mine, nor users network adapter.

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• My client's solution of a Windows SBS 2011 VM on an Ubuntu host and VirtualBox is pinning the host CPU

  - by Scott Stamp

  Here's my situation, I've got a client hosting two servers (one VM), with the host providing VMware Zimbra, the other Windows Small Business Server 2011. Unfortunately, the person before me had configured this setup as follows. Host: Ubuntu Desktop Edition 10.04 (I know, again, not my choice) running VMware Zimbra 8GB of RAM On-board RAID1 of two 320GB Seagate Barracuda drives for the OS Software RAID5 of four 500GB WD Caviar Black drives on MDADM for bulk storage (sorry, I don't know the model #) A relatively competent quad-core Intel Core i7 CPU from the Nehalem architecture (not suspicious of this as the bottleneck) Guest: Windows Small Business Server 2011 4GB of RAM Host-equivalent CPU allocation VDI file for OS hosted on the on-board RAID, VDI file for storage hosted on the on-board RAID For some reason when running, the VM locks up when sitting nearly idle, and the VirtualBox process reports values of 240%+ in top (how is that even possible?!). Anyone have any ideas or suggestions? I'm totally stumped on this one. Happy to provide whatever logs you'd like to take a look at. Ideally I'd drop VirtualBox and provision this with VMware Workstation, but the client has objected to the (very nominal) costs involved. If hardware needs to be purchased to help, it will be, but we're considering upgrades a last-resort at this time. Thanks in advance! *fingers crossed*

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• PTR record not valid for all domains

  - by charnley

  We have an issue sending emails to certain domains, namely Time Warner and Cox. Last week, we decommissioned our Exchange 2003 server and now our Exchange 2010 server is doing all of the transport for our domain. We run our own authoritative name servers, so we are in charge of the DNS and have modified our PTR record to reflect the new server. All mailflow is working except for these 2 domains. When I telnet on port 25 to the mail servers for Cox and Time Warner I am receiving errors. For Cox the error is: 554... rejected - no rDNS And when I telnet to port 25 to the Time Warner mail server we get this: 554 5.7.1 - Connection refused. IP name lookup failed for x.x.x.x I have run through the outbound SMTP test on Microsoft Remote Connectivity Analyzer and get 100% completely successful results. MXToolbox comes up with all successful tests on SMTP as well, showing correct reverse banner check, and no blacklisting. DNSQueries.com shows a valid reverse DNS entry as well for us. Outbound emails to these 2 domains continue to sit in the queue. Any ideas or advice would be greatly appreciated. Thanks!

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