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• Javascript drop down menu calculation

  - by Janis Yee

  I'm having a bit of an issue with me code. I'm trying to do a calculation from a drop down menu and then it will onChange to a textbox. I've been at it for days trying to figure it out and Googling ways to code the function. Can anyone please help or give me advice on how to approach this? function numGuest() { var a = document.getElementById("guests"); if(a.options[a.selectedIndex].value == "0") { registration.banq.value = "0"; } else if(a.options[a.selectedIndex].value == "1") { registration.banq.value = "30"; } } <select id="guests" name="guests"> <option value="0">0</option> <option value="1">1</option> <option>2</option> <option>3</option> <option>4</option> <option>5</option> </select> <input type="text" id="banq" name="banq" onChange="numGuest()" disabled />

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• How to make sysctl network bridge settings persist after a reboot?

  - by Zack Perry

  I am setting up a notebook for software demo purpose. The machine has 8GB RAM, a Core i7 Intel CPU, a 128GB SSD, and runs Ubuntu 12.04 LTS 64bit. The notebook is used as a KVM host and runs a few KVM guests. All such guests use the virbr0 default bridge. To enable them to communicate with each other using multicast, I added the following to the host's /etc/sysctl.conf, as shown below net.bridge.bridge-nf-call-ip6tables = 0 net.bridge.bridge-nf-call-iptables = 0 net.bridge.bridge-nf-call-arptables = 0 Afterwards, following man sysctl(8), I issued the following: sudo /sbin/sysctl -p /etc/sysctl.conf My understanding is that this should make these settings persist over reboots. I tested it, and was surprised to find out the following: root@sdn1 :/proc/sys/net/bridge# more *tables :::::::::::::: bridge-nf-call-arptables :::::::::::::: 1 :::::::::::::: bridge-nf-call-ip6tables :::::::::::::: 1 :::::::::::::: bridge-nf-call-iptables :::::::::::::: 1 All defaults are coming back! Yes. I can use some kludgy "get arounds" such as putting a /sbin/sysctl -p /etc/sysctl.conf into the host's /etc/rc.local but I would rather "do it right". Did I misunderstand the man page or is there something that I missed? Thanks for any hints. -- Zack

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• NFS and KVM. Slow Speed

  - by Javier Martinez

  I have a KVM virtualization in Debian with 2 guests (Debian and Windows 2008). I want to have a 'mount point' shared that can be accessed by the 3 system (host and 2 guests) at the same time. So the only thing that I found was a NFS/SMB network storage. I picked NFS Due to my Ethernet network (10/100), the speed average that I get between accessing/transfering files between the 3 system is always 8~10MB/s. The point is if is there any chance of get a boost system for sharing files between 3 system (at the same time) without wasting the speed of my SATA disks. I mean, without the Ethernet limitation of 10 MB/s

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• Virtualized CPU cores vs. threads

  - by nedm

  We've got a KVM host system on Ubuntu 9.10 with a newer Quad-core Xeon CPU with hyperthreading. As detailed on Intel's product page, the processor has 4 cores but 8 threads. /proc/cpuinfo and htop both list 8 processors, though each one states 4 cores in cpuinfo. KVM/QEMU also reports 8 VCPUs available to assign to guests. My question is when I'm allocating VCPUs to VM guests, should I allocate per-core or per-thread? Since KVM/QEMU reports the server has 8 VCPUs to allocate, should I go ahead and set a guest to use 4 CPUs where I previously would have set it to use 2 (assuming 4 total VCPUs available)? I'd like to get the most possible out of the host hardware without over-allocating.

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• Linux Disk Setup for VMs

  - by zjherner

  Been trying to find the ideal way to setup disks/partitions for Linux guests on ESXi. Seems as though Linux is falling behind when it comes easily adding disk space. The end goal is to be able to add disk space to a Linux server without rebooting the server or taking the server offline. Ideally, I would expect adding disk to a Linux machine should be as easy as adding disk space to a Windows machine. I expand the vmdk file from vSphere Open disk mangler find the disk and extend volume. Would have to use command line tools in linux which is no big deal, but I haven't been able to find a solid way to exand filesystems on the fly. What is everyone else using for disk setups on their linux guests? Has anyone been able to acheive adding storage space to linux without downtime? Can it be done without using lvm?

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• Have you registered? Oracle 'In Touch' PartnerCast: Be prepared for a year of growth

  - by Julien Haye

  Hi there Oracle Partners, We hope you’ve seen our recent blog post regarding the next Oracle ‘In Touch’ PartnerCast? Hosted by David Callaghan, Senior Vice President EMEA Alliances and Channels, to be broadcast on Tuesday 1st July 2014 from 10:30am UK/11:30am CET. David and his studio guests will be discussing the latest news from Oracle; including highlights of FY14, Strategic themes for FY15 and SaaS. We will also have an exclusive for ‘In Touch’ whereby David interviews Senior Vice President, Global Alliances & Channels, Rich Geraffo, on what the FY15 Oracle Global Partner Kick Off means for EMEA Oracle Partners. Also, David provides your chance to hear from some of the newly appointed Oracle Worldwide A&C Leadership Team. Got a question for David and his guests? Get in touch on Twitter using the hashtag #OracleInTouch or by emailing [email protected] to get your questions featured in the cast! To find out more information and to watch previous episodes on-demand, please visit our webpage here. We hope you can make it! Oracle EMEA Alliances & Channels

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• Correlating %RDY in esxtop to CPU Usage in Guest

  - by Joe

  We recently upgrade a number of our VmWare hosts from 4.1 to 5.5 and noticed many of the VMs saw a step-wise jump in CPU usage as shown by the guest VM. We have not yet upgraded vmwaretools on any of the guests, but after investigating a bit more we saw many of these guests with a high %RDY value (50%) when viewed under esxtop. Unfortunately Linux (the guest) just shows "high CPU usage" without any insight into what portion of that is coming from %RDY (VmWare saying, "your guest is waiting on CPU from the host"). Are there any tools, /proc entries, etc. that can shed light on that information?

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• Best practice for system clock sync on KVM host

  - by Tauren

  I have an Ubuntu 9.10 server running as a KVM host with ntpd installed on it. The host system has the correct system time. At the moment I only have a single KVM guest, also Ubuntu 9.10 server. I do not have ntpd installed on it, and I just discovered the clock is about 6 minutes slow. It wasn't that way when it was installed about a month ago. I thought that I only needed to keep the host clock synchronized and that the guests used the host clock. But maybe that is a memory from using OpenVZ. I believe the reasoning was related to only the host could modify the physical system clock. Is running ntpd on both the host and all the guests the correct thing to do? Or is there something else that is preferred? How should I keep the guest clocks in sync?

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• How can I perform a controlled shutdown of a virtualbox guest using VBoxManage?

  - by Bryan

  I'm currently testing Ubuntu 10.04, and have install the VirtualBox software. I have also installed Ubuntu 10.04 as a VirtualBox guest running on the host system. I've installed the VirtualBox Utils into the guest OS, as follows: sudo apt-get install virtualbox-ose-guest-utils What I want to be able to do is to initiate a controlled shutdown of the guest, from the host system using the VBoxManage command. I first tried this command: VBoxManage controlvm guest poweroff which worked, but didn't initiate a controlled shutdown, it effectively pulls the plug on the guest. I've since found that this command should do the trick: VBoxManage controlvm guest acpipowerbutton but this doesn't appear to do anything. Can anyone tell me what I'm doing wrong? p.s. I don't want to use SSH & Certificates to do this, as I'm also going to be running Windows guests, and I want the solution to work for all guests.

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• Ubuntu 13.04 client cannot connect to Raspbian samba share

  - by envoyweb

  I have a client Ubuntu 13.04 machine trying to connect to a server running Raspbian with samba and samba-common-bin installed on the server I can see my share and when I try to login I get this error: Unable to access location: Failed to write windows share Cannot allocate memory. I have installed ntfs-3g for the usb hard drive that already auto mounts on the server so I never had to create a directory or edit fstab. Testparm on the server states the following: [global] workgroup = ENVOYWEB server string = %h server map to guest = Bad User obey pam restrictions = Yes pam password change = Yes passwd program = /usr/bin/passwd %u passwd chat = *Enter\snew\s*\spassword:* %n\n *Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* . unix password sync = Yes syslog = 0 log file = /var/log/samba/log.%m max log size = 1000 dns proxy = No usershare allow guests = Yes panic action = /usr/share/samba/panic-action %d idmap config * : backend = tdb [homes] comment = Home Directories valid users = %S create mask = 0700 directory mask = 0700 browseable = No [printers] comment = All Printers path = /var/spool/samba create mask = 0700 printable = Yes print ok = Yes browseable = No [print$] comment = Printer Drivers path = /var/lib/samba/printers [BigDude] comment = Sharing BigDude's Files path = /media/BigDude/ valid users = @users read only = No create mask = 0755 testparm on the client which is running ubuntu is as follows [global] workgroup = ENVOYWEB server string = %h server (Samba, Ubuntu) map to guest = Bad User obey pam restrictions = Yes pam password change = Yes passwd program = /usr/bin/passwd %u passwd chat = *Enter\snew\s*\spassword:* %n\n *Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* . unix password sync = Yes syslog = 0 log file = /var/log/samba/log.%m max log size = 1000 dns proxy = No usershare allow guests = Yes panic action = /usr/share/samba/panic-action %d idmap config * : backend = tdb [printers] comment = All Printers path = /var/spool/samba create mask = 0700 printable = Yes print ok = Yes browseable = No [print$] comment = Printer Drivers path = /var/lib/samba/printers

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• Friday Tips #6, Part 2

  - by Chris Kawalek

  Here is a question about updating Oracle VM: Question: How can I perform Oracle VM 3 server updates from Oracle VM Manager? Answer by Gregory King, Principal Best Practices Consultant, Oracle VM Product Management: Server Update Manager is a built-in feature of the Oracle VM Manager. Basically, Server Update Manager automatically configures YUM updates on all the Oracle VM Servers, pointing each to our Unbreakable Linux Network (ULN) update channel for Oracle VM. The servers periodically check with our Oracle YUM repository and notify the Oracle VM Manager that an update is available for each server. Actual server updates must be triggered by the Oracle VM administrator – they are not executed automatically. At this point, you can use the Oracle VM Manager to put a server into maintenance mode which live migrates all the running Oracle VM Guests to other Oracle VM Servers in the server pool. Once all the Oracle VM Guests have been migrated, the Oracle VM administrator can trigger the update on the server. The entire process is documented in the Installation and Upgrade Guide of Oracle VM Documentation so I won’t spend time detailing the steps. However, configuring the Server Update Manager is exceedingly simple. Simply navigate to the Tools and Resources tab in the Oracle VM Manager, select the link for Server Update Manager and ensure the following values are added to the text boxes as shown in the illustration below: YUM Base URL: http://public-yum.oracle.com/repo/OracleVM/OVM3/latest/x86_64 YUM GPG Key: file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle Every server in the pool will be automatically configured for YUM updates once you choose the Apply button. Many thanks to Greg and Rick for providing the answers to this week's questions. If you want to ask us something, hit up Twitter and use hashtag #AskOracleVirtualization. See you next week! -Chris 

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• virtual install from ISO not getting virtual kernel

  - by Pete

  I have a KVM host (12.04.5) that I have been installing guests on in variety of ways. I just noticed recently one of my guests was running a generic kernel when I'm fairly certain I specified minimum virtual machine during install from a 12.04.2 server iso. From what I understand it should be running a stripped down kernel "optimized" for VMs. I set up another server to test, this time using a 14.04.1, and sure enough I ended up with uname -r returning 3.13.0-32-generic. It seems that if I use an .iso to install, I end up with generic regardless. However building with the vmbuilder ... --flavour virtual --suite precise ... (I don't have trusty available yet) script gives me an ubuntu 12.04.5 LTS system running kernel 3.2.0-67-virtual. The server FAQ mentions I should be getting the virtual kernel. What are practical advantages of using linux-image-virtual kernel? gives me the impression that it doesn't really matter functionally (in my case I only have a couple VMs running). I first thought was maybe I was somehow not applying the correct options because the installer F4 menu doesn't really give great feedback if the mode has been selected or not. Looking in the log /var/log/installers/syslog I see Command line: file=/cdrom/preceed/ubuntu-server-minimalvm.seed ... I know that I can install the virtual kernel package down the road, but why am I not, or should I be getting the virtual flavor of kernel from an ISO install when doing an minimum VM install?

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• Understanding ESXi and Memory Usage

  - by John

  Hi, I am currently testing VMWare ESXi on a test machine. My host machine has 4gigs of ram. I have three guests and each is assigned a memory limit of 1 GB (and only 512 MB reserved). The host summary screen shows a memory capacity of 4082.55 MB and a usage of 2828 MB with two guests running. This seems to make sense, two gigs for each VM plus an overhead for the host. 800MB seems high but that is still reasonable. But on the Resource Allocation Screen I see a memory capacity of 2356 MB and an available capacity of 596 MB. Under the configuration tab, memory link I see a physical total of 4082.5 MB, System of 531.5 MB and VM of 3551.0 MB. I have only allocated my VMs for a gig each, and with two VMs running they are taking up almost two times the amount of ram allocated. Why is this, and why does the Resource Allocation screen short change me so much?

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• Xen and Ubuntu?

  - by wag2639

  How does one properly approach having Ubuntu servers on a Xen hypervisor? I don't have any experience with RAID or Xen other than from a theoretical level. Additional requirements: Use with mdadm Software RAID 5 (can be on separate disks) that multiple instances with access Paravirtualized Ubuntu Server guests instances Possible ideas for now: Ubuntu host (dom0) with ubuntu-xen-server package (this purportedly isn't supported) dom0 host will "own" RAID 5 partition More Ubuntu servers as guests Citrix XenServer bare-metal host XenServer will own RAID Citrix XenServer bare-metal host Ubuntu guest instance creates and owns RAID Questions and concerns: Can Ubuntu be used as a dom0 Xen host? Can XenServer install packages such as mdadm and create a partition? Can multiple guest access (R + W) to the same data partition (RAID)? Note: since it may have a bearing on support, I'm referring to Ubuntu Server 10.04

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• VMware virtual network adapters and Windows Firewall

  - by anonymous

  I am running VMware Workstation 7.1.4 on Windows 7 Enterprise SP1-U (x64). Aside from the physical network adapter, I have created a single virtual network adapter (VMware Virtual Ethernet Adapter for VMnet1) which is connected to (can be seen by) the host and the guests. My problem is, even after applying the "*NdisDeviceType = 1" tweak to the virtual adapter, making it disappear from the Network and Sharing Center, I still can't connect to programs running in the host from the guests, unless I specifically "allowed the program to communicate with the public network" using the Windows Firewall (which I don't want to do). This happens to all the programs and services running in the host (File and Printer Sharing, Database server, HTTP proxy, etc.) I am getting the impression that applying the "*NdisDeviceType = 1" tweak only hides a network from the Network and Sharing Center but not actually making it private. Any hints and suggestions?

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• How to disable or tune filesystem cache sharing for OpenVZ?

  - by gertvdijk

  For OpenVZ, an example of container-based virtualization, it seems that host and all guests are sharing the filesystem cache. This sounds paradoxical when talking about virtualization, but this is actually a feature of OpenVZ. It makes sense too. Because only one kernel is running, it's possible to benefit from sharing the same pages of filesystem cache in memory. And while it sounds beneficial, I think a set up here actually suffers in performance from it. Here's why I think why: my machines aren't actually sharing any files on disk so I can't benefit from this feature in OpenVZ. Several OpenVZ machines are running MySQL with MyISAM tables. MyISAM relies on the system's filesystem cache for caching of data files, unlike InnoDB's buffer pool. Also some virtual machines are known to do heavy and large I/O operations on the same filesystem in the host. For example, when running cat *.MYD > /dev/null on some large database in one machine, I saw the filesystem cache lowering in another, monitored by htop. This essentially flushes all the useful filesystem cache in guests (FIFO) and so it flushes the MySQL caches in the guests. Now users are complaining that MySQL is very slow. And it is. Some simple SELECT queries take several seconds on times disk I/O is heavily used by other machines. So, simply put: Is there a way to avoid filesystem cache being wiped out by other virtual machines in container-based virtualization? Some thoughts: Choosing algorithm for flushing filesystem cache in the kernel. (possible? how?) Reserving a certain amount of pages for a single VM. (seems no option for filesystem cache type of pages that reading man vzctl) Will running MySQL on another filesystem get me anywhere? If not, I think my alternatives are: Use KVM for MySQL-MyISAM running VMs. KVM actually assigns memory to the VM and does not allow swapping out caches unless using a balloon driver. Move to InnoDB and tune the buffer pools, dirty pages, etc. This is now considered to be 'nice to have' on the long-term as not everyone responsible for administration of the system understands InnoDB. more suggestions welcome. System software: Proxmox (now 1.9, could be upgraded to 2.x). One big LV assigned for the VMs.

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• Virtualbox crashes quite often in Windows 8

  - by user1776158

  I just installed Windows 8 on my computer. I got the ISO and the product key from my university so the software itself is sound. I use alot of virtual box. And ever since I moved to Windows 8, I have noticed that virtual box crashes more often. In particular, it is very very bad at opening multiple guests. My CPU usage will be at like 20% and I only have 3 guests open and my entire computer just freezes. Cursor and all. In Windows 7, I was able to open like 6 (not that I ever needed to) and really push my CPU. I havent experience any other issues with Windows 8 yet. Has anyone encountered this? Thanks!

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• VGA passthrough and desktop virtualization

  - by Zacariaz

  In short, my dream is to have one machine with multiple paravirtualized desktop and server guests, one of which has to be a Windows desktop with powerful graphics. As Windows can't be paravirtualized in the normal sense of the word, I was quite happy when I heard about VGA passthrough, but then I read on. As I understand it, such a setup would mean that the Graphics will be dedicated to one particular guest, thus you wouldn't be able to switch between guests. If this is in fact so, would someone please explain to me what the purpose/use of VGA passthrough is? I can think of no real use for it. Yes it's a cool technology, but to me it seems pointless. It's true that it's possible to passthrough individual VMs to separate GPUs, which is also cool, but in the end I should think that two seperate computers would make life a whole lot simpler. Again it seems rather pointless.

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• Copy data from Access to the next row in Excel

  - by edmon

  I have a MS Access database for a small Hotel. On the main form I have Guest Information fields...(Name, Address, Phone#, etc). I also have an Excel file that keeps track of bookings for the Hotel. The following code takes the Guest information from my form in Access and populates the labeled cells in my Excel file. Dim objXLApp As Object Dim objXLBook As Object Set objXLApp = CreateObject("Excel.Application") Set objXLBook = objXLApp.Workbooks.Open("Y:\123files\E\Hotel Reservation.xls") objXLApp.Application.Visible = True objXLBook.ActiveSheet.Range("B2") = Me.GuestFirstName & " " & GuestLastName objXLBook.ActiveSheet.Range("C2") = Me.PhoneNumber objXLBook.ActiveSheet.Range("D2") = Me.cboCheckInDate objXLBook.ActiveSheet.Range("E2") = Me.cboCheckOutDate objXLBook.ActiveSheet.Range("G2") = Me.RoomType objXLBook.ActiveSheet.Range("H2") = Me.RoomNumber End Sub Is there a way to, move to the next row in my Excel file, for a new guests info? EX. I take my first guests info and it populates row 2 of my Excel file. For my next guest it will populate row 3 of my Excel file and so on....

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• Oracle Linux and Oracle VM pricing guide

  - by wcoekaer

  A few days ago someone showed me a pricing guide from a Linux vendor and I was a bit surprised at the complexity of it. Especially when you look at larger servers (4 or 8 sockets) and when adding virtual machine use into the mix. I think we have a very compelling and simple pricing model for both Oracle Linux and Oracle VM. Let me see if I can explain it in 1 page, not 10 pages. This pricing information is publicly available on the Oracle store, I am using the current public list prices. Also keep in mind that this is for customers using non-oracle x86 servers. When a customer purchases an Oracle x86 server, the annual systems support includes full use (all you can eat) of Oracle Linux, Oracle VM and Oracle Solaris (no matter how many VMs you run on that server, in case you deploy guests on a hypervisor). This support level is the equivalent of premier support in the list below. Let's start with Oracle VM (x86) : Oracle VM support subscriptions are per physical server on which you deploy the Oracle VM Server product. (1) Oracle VM Premier Limited - 1- or 2 socket server : $599 per server per year (2) Oracle VM Premier - more than 2 socket server (4, or 8 or whatever more) : $1199 per server per year The above includes the use of Oracle VM Manager and Oracle Enterprise Manager Cloud Control's Virtualization management pack (including self service cloud portal, etc..) 24x7 support, access to bugfixes, updates and new releases. It also includes all options, live migrate, dynamic resource scheduling, high availability, dynamic power management, etc If you want to play with the product, or even use the product without access to support services, the product is freely downloadable from edelivery. Next, Oracle Linux : Oracle Linux support subscriptions are per physical server. If you plan to run Oracle Linux as a guest on Oracle VM, VMWare or Hyper-v, you only have to pay for a single subscription per system, we do not charge per guest or per number of guests. In other words, you can run any number of Oracle Linux guests per physical server and count it as just a single subscription. (1) Oracle Linux Network Support - any number of sockets per server : $119 per server per year Network support does not offer support services. It provides access to the Unbreakable Linux Network and also offers full indemnification for Oracle Linux. (2) Oracle Linux Basic Limited Support - 1- or 2 socket servers : $499 per server per year This subscription provides 24x7 support services, access to the Unbreakable Linux Network and the Oracle Support portal, indemnification, use of Oracle Clusterware for Linux HA and use of Oracle Enterprise Manager Cloud control for Linux OS management. It includes ocfs2 as a clustered filesystem. (3) Oracle Linux Basic Support - more than 2 socket server (4, or 8 or more) : $1199 per server per year This subscription provides 24x7 support services, access to the Unbreakable Linux Network and the Oracle Support portal, indemnification, use of Oracle Clusterware for Linux HA and use of Oracle Enterprise Manager Cloud control for Linux OS management. It includes ocfs2 as a clustered filesystem (4) Oracle Linux Premier Limited Support - 1- or 2 socket servers : $1399 per server per year This subscription provides 24x7 support services, access to the Unbreakable Linux Network and the Oracle Support portal, indemnification, use of Oracle Clusterware for Linux HA and use of Oracle Enterprise Manager Cloud control for Linux OS management, XFS filesystem support. It also offers Oracle Lifetime support, backporting of patches for critical customers in previous versions of package and ksplice zero-downtime updates. (5) Oracle Linux Premier Support - more than 2 socket servers : $2299 per server per year This subscription provides 24x7 support services, access to the Unbreakable Linux Network and the Oracle Support portal, indemnification, use of Oracle Clusterware for Linux HA and use of Oracle Enterprise Manager Cloud control for Linux OS management, XFS filesystem support. It also offers Oracle Lifetime support, backporting of patches for critical customers in previous versions of package and ksplice zero-downtime updates. (6) Freely available Oracle Linux - any number of sockets You can freely download Oracle Linux, install it on any number of servers and use it for any reason, without support, without right to use of these extra features like Oracle Clusterware or ksplice, without indemnification. However, you do have full access to all errata as well. Need support? then use options (1)..(5) So that's it. Count number of 2 socket boxes, more than 2 socket boxes, decide on basic or premier support level and you are done. You don't have to worry about different levels based on how many virtual instance you deploy or want to deploy. A very simple menu of choices. We offer, inclusive, Linux OS clusterware, Linux OS Management, provisioning and monitoring, cluster filesystem (ocfs), high performance filesystem (xfs), dtrace, ksplice, ofed (infiniband stack for high performance networking). No separate add-on menus. NOTE : socket/cpu can have any number of cores. So whether you have a 4,6,8,10 or 12 core CPU doesn't matter, we count the number of physical CPUs.

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• Trouble with Samba Domain

  - by Arkevius

  I'm having a bit of trouble setting up this Samba domain correctly. I'm getting an Access Denied error when trying to add a Windows XP machine to the domain. I'll go through my scenario in detail, but for those of you wanting a TLDR summary it'll be at the bottom of this post. I have HP Proliant server with Ubuntu 12.04 LTS installed. For this particular environment, I need this server to act as a PDC, file server, and print server. I began by updating and upgrading the packages (of course). Then went to install samba, gnome-desktop, wine, and cpanm. Samba was, of course, for the PDC and file/print services. The GUI was needed because a certain software has to be installed on there that needs a GUI. Wine was needed because the software is Windows-native. And cpanm was for a perl script I have running. For Samba, I went into the smb.conf file and enabled domain logons, changed the workgroup/domain name, the logon script for a per-group basis (netlogon/%g), enabled the netlogon and profiles share, and setup a couple of custom shares for the file service. The printer was added later, and seems to be working just fine. I then restarted the services, and used the net groupmap command to ensure my unix groups were mapped correctly to the Windows groups. After this, I went to a Windows box, and was able to successfully join the domain without a problem. After some fidgeting with the software to get it running on the win boxes from the server (it's a records management system program, which stores it's database files on the server), I went to add another computer to the domain. But now it's saying Access Denied. Before when I had this trouble it was because I forgot to add the group "machines" so Samba could create machine accounts. Thinking this was the case, I manually created the machine account to test this theory. However, it would still give me an Access Denied error. That must mean it has something to do with permissions now, correct? I've been fighting with this server for the past two weeks. If it's not one thing that;s wrong, then it's something else completely different. This would be the third time I've actually reinstalled everything to start over. I'll post snippets of my system settings below. If anything else is needed, just say the word and I'll gather up the info. The unix group 'domadmin' is the Domain Admins group. Samba Administrator account administrator:x:1000:1000:Administrator,,,:/home/administrator:/bin/bash Adminstrator's groups administrator adm cdrom sudo dip plugdev lpadmin sambashare domadmin crimestar Samba's Configuration FIle (a snippet anyways) [global] workgroup = CITYPD server string = BPDServer dns proxy = no log file = /var/log/samba/log.%m max log size = 1000 syslog = 0 panic action = /usr/share/samba/panic-action %d security = user encrypt passwords = true passdb backend = tdbsam obey pam restrictions = yes unix password sync = yes passwd program = /usr/bin/passwd %u passwd chat = *Enter\snew\s*\spassword:* %n\n *Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* . pam password change = yes map to guest = bad user domain logons = yes logon path = \\%L\srv\samba\profiles\%U logon script = logon.bat add machine script = /usr/sbin/useradd -g machines -c "%u machine account" -d /var/lib/samba -s /bin/false %u domain master = yes usershare allow guests = yes [netlogon] comment = Network Logon Service path = /srv/samba/netlogon/%g guest ok = yes read only = yes browseable = no [profiles] comment = All Printers browseable = no path = /var/spool/samba printable = yes guest ok = no read only = yes create mask = 0700 [print$] comment = Printer Drivers path = /var/lib/samba/printers browseable = yes read only = yes guest ok = no write list = root, @lpadmin [crimestar] comment = "Crimestar DB" path = /srv/crimestar/db valid users = @domadmin, @crimestar admin users = administrator writeable = yes guest ok = no browseable = no create mask = 0666 directory mask = 0777 [crimestarfiles] path = /home/administrator/.wine/drive_c/crimestar admin users = administrator browseable = yes ls -la on /srv/samba/profiles drwxrwxrwx 2 root machines 4096 Nov 21 15:27 . drwxr-xr-x 4 root root 4096 Nov 21 15:28 .. ls -la on /srv/samba/netlogon drwxr-xr-x 6 root root 4096 Nov 21 15:30 . drwxr-xr-x 4 root root 4096 Nov 21 15:28 .. drwxr-xr-x 2 root root 4096 Nov 21 15:30 crimestar drwxr-xr-x 2 root root 4096 Nov 21 18:13 domadmin drwxr-xr-x 3 root root 4096 Nov 21 15:30 guests drwxr-xr-x 2 root root 4096 Nov 21 15:29 users GrouMap list Domain Users (S-1-5-21-2978508755-2341913247-928297747-513) -> users Domain Admins (S-1-5-21-2978508755-2341913247-928297747-512) -> domadmin Domain Guests (S-1-5-21-2978508755-2341913247-928297747-514) -> nogroup TLDR I'm getting an Access Denied error message while trying to join a windows box to a samba domain, even after I successfully joined another computer without a problem. System settings / files are quoted above. Anyone have any ideas or suggestions?

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• Server is on or off

  - by Daniel

  Curious. I'm starting to broadcast high school football games online, and it uses a program to broadcast the feeds off my computer. However, when I shut the program down or the computer down, the server goes offline and guests won't be able to access the feeds. Is there any kind of code out there that I can post onto my website that will indicate to my guests whether the server is on or off? I would figure it would be a simple code, a php script or something that periodically checks to see if a site is on line and then displays ON or OFF.

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• Nagios: NRPE: Unable to read output, Can't find the reason, can you?

  - by Itai Ganot

  I have a Nagios server and a monitored server. On the monitored server: [root@Monitored ~]# netstat -an |grep :5666 tcp 0 0 0.0.0.0:5666 0.0.0.0:* LISTEN [root@Monitored ~]# locate check_kvm /usr/lib64/nagios/plugins/check_kvm [root@Monitored ~]# /usr/lib64/nagios/plugins/check_kvm -H localhost hosts:3 OK:3 WARN:0 CRIT:0 - ab2c7:running alpweb5:running istaweb5:running [root@Monitored ~]# /usr/lib64/nagios/plugins/check_nrpe -H localhost -c check_kvm NRPE: Unable to read output [root@Monitored ~]# /usr/lib64/nagios/plugins/check_nrpe -H localhost NRPE v2.14 [root@Monitored ~]# ps -ef |grep nrpe nagios 21178 1 0 16:11 ? 00:00:00 /usr/sbin/nrpe -c /etc/nagios/nrpe.cfg -d [root@Monitored ~]# On the Nagios server: [root@Nagios ~]# /usr/lib64/nagios/plugins/check_nrpe -H 1.1.1.159 -c check_kvm NRPE: Unable to read output [root@Nagios ~]# /usr/lib64/nagios/plugins/check_nrpe -H 1.1.1.159 NRPE v2.14 [root@Nagios ~]# When I check another server in the network using the same command it works: [root@Nagios ~]# /usr/lib64/nagios/plugins/check_nrpe -H 1.1.1.80 -c check_kvm hosts:4 OK:4 WARN:0 CRIT:0 - karmisoft:running ab2c4:running kidumim1:running travel2gether1:running [root@Nagios ~]# Running the check locally using Nagios account: [root@Monitored ~]# su - nagios -bash-4.1$ /usr/lib64/nagios/plugins/check_kvm hosts:3 OK:3 WARN:0 CRIT:0 - ab2c7:running alpweb5:running istaweb5:running -bash-4.1$ Running the check remotely from the Nagios server using Nagios account: -bash-4.1$ /usr/lib64/nagios/plugins/check_nrpe -H 1.1.1.159 -c check_kvm NRPE: Unable to read output -bash-4.1$ /usr/lib64/nagios/plugins/check_nrpe -H 1.1.1.159 NRPE v2.14 -bash-4.1$ Running the same check_kvm against a different server in the network using Nagios account: -bash-4.1$ /usr/lib64/nagios/plugins/check_nrpe -H 1.1.1.80 -c check_kvm hosts:4 OK:4 WARN:0 CRIT:0 - karmisoft:running ab2c4:running kidumim1:running travel2gether1:running -bash-4.1$ Permissions: -rwxr-xr-x. 1 root root 4684 2013-10-14 17:14 nrpe.cfg (aka /etc/nagios/nrpe.cfg) drwxrwxr-x. 3 nagios nagios 4096 2013-10-15 03:38 plugins (aka /usr/lib64/nagios/plugins) /etc/sudoers: [root@Monitored ~]# grep -i requiretty /etc/sudoers #Defaults requiretty iptables/selinux: [root@Monitored xinetd.d]# service iptables status iptables: Firewall is not running. [root@Monitored xinetd.d]# service ip6tables status ip6tables: Firewall is not running. [root@Monitored xinetd.d]# grep disable /etc/selinux/config # disabled - No SELinux policy is loaded. SELINUX=disabled [root@Monitored xinetd.d]# The command in /etc/nagios/nrpe.cfg is: [root@Monitored ~]# grep kvm /etc/nagios/nrpe.cfg command[check_kvm]=sudo /usr/lib64/nagios/plugins/check_kvm and the nagios user is added on /etc/sudoers: nagios ALL=(ALL) NOPASSWD:/usr/lib64/nagios/plugins/check_kvm nagios ALL=(ALL) NOPASSWD:/usr/lib64/nagios/plugins/check_nrpe The check_kvm is a shell script, looks like that: #!/bin/sh LIST=$(virsh list --all | sed '1,2d' | sed '/^$/d'| awk '{print $2":"$3}') if [ ! "$LIST" ]; then EXITVAL=3 #Status 3 = UNKNOWN (orange) echo "Unknown guests" exit $EXITVAL fi OK=0 WARN=0 CRIT=0 NUM=0 for host in $(echo $LIST) do name=$(echo $host | awk -F: '{print $1}') state=$(echo $host | awk -F: '{print $2}') NUM=$(expr $NUM + 1) case "$state" in running|blocked) OK=$(expr $OK + 1) ;; paused) WARN=$(expr $WARN + 1) ;; shutdown|shut*|crashed) CRIT=$(expr $CRIT + 1) ;; *) CRIT=$(expr $CRIT + 1) ;; esac done if [ "$NUM" -eq "$OK" ]; then EXITVAL=0 #Status 0 = OK (green) fi if [ "$WARN" -gt 0 ]; then EXITVAL=1 #Status 1 = WARNING (yellow) fi if [ "$CRIT" -gt 0 ]; then EXITVAL=2 #Status 2 = CRITICAL (red) fi echo hosts:$NUM OK:$OK WARN:$WARN CRIT:$CRIT - $LIST exit $EXITVAL Edit (10/22/13): Following all that, I am now able to get some response from the script: [root@Monitored ~]# /usr/lib64/nagios/plugins/check_nrpe -H localhost -c check_kvm Unknown guests [root@Monitored ~]# /usr/lib64/nagios/plugins/check_nrpe -H localhost NRPE v2.14 [root@Monitored ~]# /usr/lib64/nagios/plugins/check_kvm hosts:3 OK:3 WARN:0 CRIT:0 - ab2c7:running alpweb5:running istaweb5:running [root@Monitored ~]# su - nagios -bash-4.1$ /usr/lib64/nagios/plugins/check_kvm hosts:3 OK:3 WARN:0 CRIT:0 - ab2c7:running alpweb5:running istaweb5:running -bash-4.1$ /usr/lib64/nagios/plugins/check_nrpe -H localhost -c check_kvm Unknown guests -bash-4.1$ /usr/lib64/nagios/plugins/check_nrpe -H localhost NRPE v2.14 It seems like the problem is some how related to the check_nrpe command or something which is related to the nrpe installation on the server.

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• Strange Upload Problem on Hyper-V

  - by Ring0

  Hi, This one is driving me totally nuts. I have being trying to upload a file to www.virustotal.com (its a harmless exe I have since found out - DiskWipe.exe from diskwipe.org). Using IE8. From Win 7 and Win 2008 R2 Datacenter (which I select to boot from vhd's) onto my main machine hardware, and also on another Win 7 PC elsewhere on my network, when I upload the file to virustotal.com it works perfectly. So, using my native NIC's everything is fine. Using another machine also perfect. Right. OK, from my boot menu the default is my main development machine - the one I'm typing on now. This runs on the metal and has Hyper-V role and I have some guests. All guests are not running. Amazingly, from my console (root partition to be exact) or any guest OS 2003 /XP / 2008 R2 etc. My upload to virustotal.com slows at 32% then HANGS at 38.something% & never finishes!! Here is the kicker. I have another box (my main server) running Hyper-V on the metal and three live guests. Identical H/W to my main dev machine in another room. (Except OS is Datacenter - Mine is Enterprise). If I try and upload from its bare metal console or any guest this file to virustotal.com using IE8 it stops exactly in the same place!! As for "steps I have tried etc." are kind-of blown out of the water as my server box is doing the precise same thing as the machine in my room here. OK, comonalities: Mobo: Gigabyte GA-X58-UD5, 12GB Kingston RAM, Corei7 920 4 cores hyperthreading = 8 & Realtek RTL8168D/8111D Family PCI-E Gigabit Ethernet NIC's. All 3 machines have this same motherboard - revision F11 Bios, all have 12GB RAM, all have the Realtek Nic's. All x64 by the way as I mentioned before I have a Win 7 box also with the UD5 m/Board, 12 GB RAM - bit of an overkill. :-) All these machines when NOT running Hyper-V can upload this file. Perhaps you may like to try it on a Hyepr-v (2008 R2) yourselves with IE8 and the desktop experience is on. See if it works or fails for you. Root OS or any guest. So, looking like its the NIC + Hyper-V = Cannot upload this file (any file I must add.) Realtek Nic is Ver 7.002.1125.2008. Using IE8 I see in the nic settings there are the usual parameters for Jumbo frames / Checksum offloading etc. several others. Should I fiddle with these? I ran Netmon 3.3 in a guest and the TCP session halted as the upload failed. I suppose I could study that further. I dont have Netmon on the root partition machine (yet)! All OS's fully patched - including todays defender files. My box running Office 2007 - but identical server in another room is not. Also, if I fire up a VPN to a distant client and do the upload it works! Of course its a different network path. Suggestions welcome please. If I left out anything important - please yell at me. Many Thanks,

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• Dartisans Ep. 6 - Meet the community - Dart hangout

  Dartisans Ep. 6 - Meet the community - Dart hangout In this episode of Dartisans, we are joined by special guests from the Dart community. John Evans, Adam Smith, Chris Buckett, John McCutchan, and Lars Tackmann talk about their Dart libraries, what they like about Dart, and what they want to see in the future. Get started with Dart at www.dartlang.org From: GoogleDevelopers Views: 4 0 ratings Time: 48:11 More in Science & Technology

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