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Articles indexed Tuesday December 11 2012

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• Filtered Router Interface

  - by jviotti

  I'm having some problems with a Scientific-Atlanta DPR2320R2. In specific with the WIFI. A few months ago I changed its password and username and now I can't remember. So I tried cracking it with Hydra but it drove things worse. Content of webadmin was rendered partial, and threw lot of errors. I then reseted the router. I found myself abled to browse the web with ethernet-connected pc. Wifi is configured by registering the device's MAC Address, and indeed the router has been reseted and register MAC address were lost. No device could connect to wifi. In fact, the device does not even recognize the network. I tried the pointing to 192.168.0.1 to restablish the MAC's. But I couldn't connect to the router access point. Tried listing up hosts: $ nmap -sP 192.168.0.0/24 Starting Nmap 5.00 ( http://nmap.org ) at 2012-12-11 01:18 ART Host 192.168.0.1 is up (0.0018s latency). Host 192.168.0.11 is up (0.00025s latency). Nmap done: 256 IP addresses (2 hosts up) scanned in 59.62 seconds Then checked 192.168.0.1 was really up by sending pings. It responded to all my pings. I quick-scanned the access point: $ nmap 192.168.0.1 Starting Nmap 5.00 ( http://nmap.org ) at 2012-12-11 01:08 ART Interesting ports on 192.168.0.1: Not shown: 999 closed ports PORT STATE SERVICE 80/tcp filtered http Nmap done: 1 IP address (1 host up) scanned in 6.73 seconds Look the state of the port 80: FILTERED. I'm pretty confused now. Any suggestion would be appreciated. Thanks in advance.

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• Amazon EC2 High-Memory Extra Large Instance

  - by Simpanoz

  I am new to Mongodb and EC2. If I use following single MongoDb server : High-Memory Extra Large Instance 17.1 GiB memory, 6.5 ECU (2 virtual cores with 3.25 EC2 Compute Units each), 420 GB of local instance storage, 64-bit platform As a layman, if we quantify I/O, data in MB/sec. How much I/O transactions mongodb server can handle easily, without being burnt out. Consider default settings of EC2 server with Ubuntu and MongoDb version available in AWS marketplace. Thanks in advance

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• Determining cause of high NFS/IO utilization without iotop

  - by Matt

  I have a server that is doing an NFSv4 export for user's home directories. There are roughly 25 users (mostly developers/analysts) and about 40 servers mounting the home directory export. Performance is miserable, with users often seeing multi-second lags for simple commands (like ls, or writing a small text file). Sometimes the home directory mount completely hangs for minutes, with users getting "permission denied" errors. The hardware is a Dell R510 with dual E5620 CPUs and 8 GB RAM. There are eight 15k 2.5” 600 GB drives (Seagate ST3600057SS) configured in hardware RAID-6 with a single hot spare. RAID controller is a Dell PERC H700 w/512MB cache (Linux sees this as a LSI MegaSAS 9260). OS is CentOS 5.6, home directory partition is ext3, with options “rw,data=journal,usrquota”. I have the HW RAID configured to present two virtual disks to the OS: /dev/sda for the OS (boot, root and swap partitions), and /dev/sdb for the home directories. What I find curious, and suspicious, is that the sda device often has very high utilization, even though it only contains the OS. I would expect this virtual drive to be idle almost all the time. The system is not swapping, according to "free" and "vmstat". Why would there be major load on this device? Here is a 30-second snapshot from iostat: Time: 09:37:28 AM Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await svctm %util sda 0.00 44.09 0.03 107.76 0.13 607.40 11.27 0.89 8.27 7.27 78.35 sda1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 sda2 0.00 44.09 0.03 107.76 0.13 607.40 11.27 0.89 8.27 7.27 78.35 sdb 0.00 2616.53 0.67 157.88 2.80 11098.83 140.04 8.57 54.08 4.21 66.68 sdb1 0.00 2616.53 0.67 157.88 2.80 11098.83 140.04 8.57 54.08 4.21 66.68 dm-0 0.00 0.00 0.03 151.82 0.13 607.26 8.00 1.25 8.23 5.16 78.35 dm-1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 dm-2 0.00 0.00 0.67 2774.84 2.80 11099.37 8.00 474.30 170.89 0.24 66.84 dm-3 0.00 0.00 0.67 2774.84 2.80 11099.37 8.00 474.30 170.89 0.24 66.84 Looks like iotop is the ideal tool to use to sniff out these kinds of issues. But I'm on CentOS 5.6, which doesn't have a new enough kernel to support that program. I looked at Determining which process is causing heavy disk I/O?, and besides iotop, one of the suggestions said to do a "echo 1 /proc/sys/vm/block_dump". I did that (after directing kernel messages to tempfs). In about 13 minutes I had about 700k reads or writes, roughly half from kjournald and the other half from nfsd: # egrep " kernel: .*(READ|WRITE)" messages | wc -l 768439 # egrep " kernel: kjournald.*(READ|WRITE)" messages | wc -l 403615 # egrep " kernel: nfsd.*(READ|WRITE)" messages | wc -l 314028 For what it's worth, for the last hour, utilization has constantly been over 90% for the home directory drive. My 30-second iostat keeps showing output like this: Time: 09:36:30 PM Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await svctm %util sda 0.00 6.46 0.20 11.33 0.80 71.71 12.58 0.24 20.53 14.37 16.56 sda1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 sda2 0.00 6.46 0.20 11.33 0.80 71.71 12.58 0.24 20.53 14.37 16.56 sdb 137.29 7.00 549.92 3.80 22817.19 43.19 82.57 3.02 5.45 1.74 96.32 sdb1 137.29 7.00 549.92 3.80 22817.19 43.19 82.57 3.02 5.45 1.74 96.32 dm-0 0.00 0.00 0.20 17.76 0.80 71.04 8.00 0.38 21.21 9.22 16.57 dm-1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 dm-2 0.00 0.00 687.47 10.80 22817.19 43.19 65.48 4.62 6.61 1.43 99.81 dm-3 0.00 0.00 687.47 10.80 22817.19 43.19 65.48 4.62 6.61 1.43 99.82

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• Configuring zsh in OSX to auto start processes

  - by calumbrodie

  I've recently converted to using zsh instead of bash in OSX and was wondering if it is possible to do the following: When I launch my terminal I would like to start various tabs and have each tab run a different process e.g tailing logs, running ruby scripts etc. Currently I need to cmd+n multiple tabs and then manually start each process. While this doesn't take long I would like to be able to just launch my terminal and have these various tabs start and run those commands automatically. Is this possible?

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• How can I setup a subnetwork using DDWRT and a 2Wire?

  - by MadBurn

  Ok, I'm having a bit of trouble getting this setup. I'm not really sure what direction I need to be looking in. I am on ATT UVerse and I have to use their horrible 2Wire Modem/Router. But with this router, I have very limited control over my network and my wifi range is too small for my house. But, I have a hardwire ran to my TV which I have hooked into a switch and split the line to my PS3. The problem I'm having, is I don't know how to get the Buffalo DD-WRT setup as a subnetwork so that the PS3 can find my Media Server. Here is a diagram of what I'm trying to accomplish: Blue is ethernet.

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• Random servers in Citrix servers suddenly bluescreens (mostly 0x0000008e and 0x0000007e)

  - by Rasmus Rask

  I'm responsible for a Citrix Presentation Server 4.5 farm. Starting Friday 30. November, my servers started to crash randomly. So far we've experienced 80 crashes, so it's obviously becoming an increasingly big problem for us. I have 12+ years experience with IT, so I know the difference between 0 and 1, but I have a hard time cracking this. We've rolled back any recent changes I can think of for different groups of servers, but all groups still seem to crash. I don't have the skills to interpret the memory dumps to find the culprit. Has anyone encountered the same or a similar problem? - might be a generic Windows issue Other than executing "analyze -v" in WinDbg, how do I work my way through the memory dumps to see what actually triggered the BSOD? Any suggested steps in getting to the bottom of this? Any help is greatly appreciated. I can also provide links to kernel memory dumps or WinDbg output if necessary. Thanks! Problem description The majority of the STOP errors we encounter are: 0x0000008e KERNEL_MODE_EXCEPTION_NOT_HANDLED (50%) 0x0000007e SYSTEM_THREAD_EXCEPTION_NOT_HANDLED (26%) 0x00000050 PAGE_FAULT_IN_NONPAGED_AREA (21%) We also see a few 0x0000000a IRQL_NOT_LESS_OR_EQUAL (3%). For both 0x0000008e and 0x0000007e bug checks, the exception code is 0xc0000005 (Access Violation). When opening dump files in WinDbg, most details are exactly the same, for all the 0x0000008e and 0x0000007e bug checks respectively: 0x0000008e Exception address: 0x808bc9e3 Trap frame: [varies] FAILURE_BUCKET_ID: 0x8E_nt!HvpGetCellMapped+97 Probably Caused by (IMAGE_NAME): ntkrpamp.exe 0x0000007e Exception address: 0x808369b6 Exception record address: 0xf70d3be0 Context record address: 0xf70d38dc FAILURE_BUCKET_ID: 0x7E_nt!MmPurgeSection+14 Probably Caused by: memory_corruption About 30% of the crashes happens between 17:00 and 19:00, which leads me to believe this tend to happen more often during logoffs. But then again, only ~15% occurs between 15:00 and 17:00. Summary of farm Citrix Presentation Server 4.5 R06 on Windows Server 2003 R2 SP2 All high priority patches, at least as of October installed Virtualized using VMWare ESX/vSphere 4.1 on HP Proliant BL460c G6 blade servers About 53 Presentation Servers in production, divided into three silos - only one of which, the largest, is affected 2 vCPU's (5 GHz reserved), 8 GB RAM (all reserved) for each Presentation Server Plenty of free disk space Very few printer drivers - automated deletion of non-approved drivers every night ~1.000 peak concurrent users, which is reached at around 10:30 (on weekdays) Number of sessions steadily decline between 15:00 and 19:00 to ~230

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• PPTP VPN on OS X and iOS failed to connect Facebook and Youtube

  - by bGiraffe

  Thnaks for reading. I setup a VPN server on my Buffalo WHR-HP-G300N router at Macau, and use it for access website over China Firewall when i travel in China. On Android and Windows, everything work fine, however on my Macbook Air and iPad, it is not working. I can access blocked site like badoo.com but not facebook and youtube. If i ping it at terminal, it said "ping: cannot resolve facebook.com: Unknown host". After i read this http://cp.hidemynet.com/knowledgebase.php?action=displayarticle&id=26, i find i can restart my router and reboot my Macbook, and connect to VPN before any request to any blocked site so that i can successfully connect to facebook and youtube. However it works sometime but not always. It is really annoying because i need to work on VPN and my Mac, would anyone can help me to solve it? Rather than restarting my router and my Mac every time. Please HELP!!! regards

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• Giving a normal user and Mysql access to a common directory

  - by James R

  We need a common directory where Mysql can do a SELECT INTO OUTFILE and then the file can be picked up by a virtual server user in /home/theuser and worked on. I can perform the SELECT INTO OUTFILE into the /tmp/ dir but theuser does not have access here. Would it be ok to grant the user access to tmp or is that bad practice? The other option I looked at was creating a group 'theusermysql' containing the mysql user and theuser. I set the group on the tree /home/theuser/thedumpfolder and gave write permissions on thedumpfolder, but for some reason mysql still complains that it cannot write here. I'm completely stumped! What would be the best practice way to have a common folder for these two users?

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• centos 6 debuginfo repository does not have httpd debug version available

  - by Zippy Zeppoli

  I am trying to get the debug version of httpd so I can use it in conjunction with gdb. I am having a hard time getting them, and they don't seem to be in the standard epel-debuginfo repository. What should I do? > [root@buildbox-rhel6 ~]# debuginfo-install httpd Loaded plugins: fastestmirror, presto enabling epel-debuginfo Loading mirror speeds from cached hostfile epel-debuginfo/metalink | 8.3 kB 00:00 * base: mirrors.cicku.me * epel: mirrors.kernel.org * epel-debuginfo: mirrors.kernel.org * extras: mirrors.arpnetworks.com * updates: linux.mirrors.es.net epel-debuginfo | 3.1 kB 00:00 epel-debuginfo/primary_db | 487 kB 00:01 Checking for new repos for mirrors Could not find debuginfo for main pkg: httpd-2.2.15-15.el6.centos.1.x86_64 Could not find debuginfo pkg for dependency package apr-1.3.9-5.el6_2.x86_64 Could not find debuginfo pkg for dependency package apr-util-1.3.9-3.el6_0.1.x86_64 Could not find debuginfo pkg for dependency package glibc-2.12-1.80.el6_3.6.x86_64 Could not find debuginfo pkg for dependency package glibc-2.12-1.80.el6_3.6.x86_64 Could not find debuginfo pkg for dependency package glibc-2.12-1.80.el6_3.6.x86_64 Could not find debuginfo pkg for dependency package glibc-2.12-1.80.el6_3.6.x86_64 Could not find debuginfo pkg for dependency package glibc-2.12-1.80.el6_3.6.x86_64 Could not find debuginfo pkg for dependency package glibc-2.12-1.80.el6_3.6.x86_64 Could not find debuginfo pkg for dependency package db4-4.7.25-17.el6.x86_64 Could not find debuginfo pkg for dependency package expat-2.0.1-11.el6_2.x86_64 Could not find debuginfo pkg for dependency package openldap-2.4.23-26.el6_3.2.x86_64 Could not find debuginfo pkg for dependency package openldap-2.4.23-26.el6_3.2.x86_64 Could not find debuginfo pkg for dependency package glibc-2.12-1.80.el6_3.6.x86_64 Could not find debuginfo pkg for dependency package pcre-7.8-4.el6.x86_64 Could not find debuginfo pkg for dependency package glibc-2.12-1.80.el6_3.6.x86_64 Could not find debuginfo pkg for dependency package glibc-2.12-1.80.el6_3.6.x86_64 Could not find debuginfo pkg for dependency package libselinux-2.0.94-5.3.el6.x86_64 Could not find debuginfo pkg for dependency package zlib-1.2.3-27.el6.x86_64 No debuginfo packages available to install

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• Using Diskpart in a PowerShell script won't allow script to reuse drive letter

  - by Kyle

  I built a script that mounts (attach) a VHD using Diskpart, cleans out some system files and then unmounts (detach) it. It uses a foreach loop and is suppose to clean multiple VHD using the same drive letter. However, after the 1st VHD it fails. I also noticed that when I try to manually attach a VHD with diskpart, diskpart succeeds, the Disk Manager shows the disk with the correct drive letter, but within the same PoSH instance I can not connect (set-location) to that drive. If I do a manual diskpart when I 1st open PoSH I can attach and detach all I want and I get the drive letter every time. Is there something I need to do to reset diskpart in the script? Here's a snippet of the script I'm using. function Mount-VHD { [CmdletBinding()] param ( [Parameter(Position=0,Mandatory=$true,ValueFromPipeline=$false)] [string]$Path, [Parameter(Position=1,Mandatory=$false,ValueFromPipeline=$false)] [string]$DL, [string]$DiskpartScript = "$env:SystemDrive\DiskpartScript.txt", [switch]$Rescan ) begin { function InvokeDiskpart { Diskpart.exe /s $DiskpartScript } ## Validate Operating System Version ## if (Get-WmiObject win32_OperatingSystem -Filter "Version < '6.1'") {throw "The script operation requires at least Windows 7 or Windows Server 2008 R2."} } process{ ## Diskpart Script Content ## Here-String statement purposefully not indented ## @" $(if ($Rescan) {'Rescan'}) Select VDisk File="$Path" `nAttach VDisk Exit "@ | Out-File -FilePath $DiskpartScript -Encoding ASCII -Force InvokeDiskpart Start-Sleep -Seconds 3 @" Select VDisk File="$Path"`nSelect partition 1 `nAssign Letter="$DL" Exit "@ | Out-File -FilePath $DiskpartScript -Encoding ASCII -Force InvokeDiskpart } end { Remove-Item -Path $DiskpartScript -Force ; "" Write-Host "The VHD ""$Path"" has been successfully mounted." ; "" } } function Dismount-VHD { [CmdletBinding()] param ( [Parameter(Position=0,Mandatory=$true,ValueFromPipeline=$false)] [string]$Path, [switch]$Remove, [switch]$NoConfirm, [string]$DiskpartScript = "$env:SystemDrive\DiskpartScript.txt", [switch]$Rescan ) begin { function InvokeDiskpart { Diskpart.exe /s $DiskpartScript } function RemoveVHD { switch ($NoConfirm) { $false { ## Prompt for confirmation to delete the VHD file ## "" ; Write-Warning "Are you sure you want to delete the file ""$Path""?" $Prompt = Read-Host "Type ""YES"" to continue or anything else to break" if ($Prompt -ceq 'YES') { Remove-Item -Path $Path -Force "" ; Write-Host "VHD ""$Path"" deleted!" ; "" } else { "" ; Write-Host "Script terminated without deleting the VHD file." ; "" } } $true { ## Confirmation prompt suppressed ## Remove-Item -Path $Path -Force "" ; Write-Host "VHD ""$Path"" deleted!" ; "" } } } ## Validate Operating System Version ## if (Get-WmiObject win32_OperatingSystem -Filter "Version < '6.1'") {throw "The script operation requires at least Windows 7 or Windows Server 2008 R2."} } process{ ## DiskPart Script Content ## Here-String statement purposefully not indented ## @" $(if ($Rescan) {'Rescan'}) Select VDisk File="$Path"`nDetach VDisk Exit "@ | Out-File -FilePath $DiskpartScript -Encoding ASCII -Force InvokeDiskpart Start-Sleep -Seconds 10 } end { if ($Remove) {RemoveVHD} Remove-Item -Path $DiskpartScript -Force ; "" } }

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• Quantifying the effects of partition mis-alignment

  - by Matt

  I'm experiencing some significant performance issues on an NFS server. I've been reading up a bit on partition alignment, and I think I have my partitions mis-aligned. I can't find anything that tells me how to actually quantify the effects of mis-aligned partitions. Some of the general information I found suggests the performance penalty can be quite high (upwards of 60%) and others say it's negligible. What I want to do is determine if partition alignment is a factor in this server's performance problems or not; and if so, to what degree? So I'll put my info out here, and hopefully the community can confirm if my partitions are indeed mis-aligned, and if so, help me put a number to what the performance cost is. Server is a Dell R510 with dual E5620 CPUs and 8 GB RAM. There are eight 15k 2.5” 600 GB drives (Seagate ST3600057SS) configured in hardware RAID-6 with a single hot spare. RAID controller is a Dell PERC H700 w/512MB cache (Linux sees this as a LSI MegaSAS 9260). OS is CentOS 5.6, home directory partition is ext3, with options “rw,data=journal,usrquota”. I have the HW RAID configured to present two virtual disks to the OS: /dev/sda for the OS (boot, root and swap partitions), and /dev/sdb for a big NFS share: [root@lnxutil1 ~]# parted -s /dev/sda unit s print Model: DELL PERC H700 (scsi) Disk /dev/sda: 134217599s Sector size (logical/physical): 512B/512B Partition Table: msdos Number Start End Size Type File system Flags 1 63s 465884s 465822s primary ext2 boot 2 465885s 134207009s 133741125s primary lvm [root@lnxutil1 ~]# parted -s /dev/sdb unit s print Model: DELL PERC H700 (scsi) Disk /dev/sdb: 5720768639s Sector size (logical/physical): 512B/512B Partition Table: gpt Number Start End Size File system Name Flags 1 34s 5720768606s 5720768573s lvm Edit 1 Using the cfq IO scheduler (default for CentOS 5.6): # cat /sys/block/sd{a,b}/queue/scheduler noop anticipatory deadline [cfq] noop anticipatory deadline [cfq] Chunk size is the same as strip size, right? If so, then 64kB: # /opt/MegaCli -LDInfo -Lall -aALL -NoLog Adapter #0 Number of Virtual Disks: 2 Virtual Disk: 0 (target id: 0) Name:os RAID Level: Primary-6, Secondary-0, RAID Level Qualifier-3 Size:65535MB State: Optimal Stripe Size: 64kB Number Of Drives:7 Span Depth:1 Default Cache Policy: WriteBack, ReadAdaptive, Direct, No Write Cache if Bad BBU Current Cache Policy: WriteThrough, ReadAdaptive, Direct, No Write Cache if Bad BBU Access Policy: Read/Write Disk Cache Policy: Disk's Default Number of Spans: 1 Span: 0 - Number of PDs: 7 ... physical disk info removed for brevity ... Virtual Disk: 1 (target id: 1) Name:share RAID Level: Primary-6, Secondary-0, RAID Level Qualifier-3 Size:2793344MB State: Optimal Stripe Size: 64kB Number Of Drives:7 Span Depth:1 Default Cache Policy: WriteBack, ReadAdaptive, Direct, No Write Cache if Bad BBU Current Cache Policy: WriteThrough, ReadAdaptive, Direct, No Write Cache if Bad BBU Access Policy: Read/Write Disk Cache Policy: Disk's Default Number of Spans: 1 Span: 0 - Number of PDs: 7 If it's not obvious, virtual disk 0 corresponds to /dev/sda, for the OS; virtual disk 1 is /dev/sdb (the exported home directory tree).

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• Cisco SA520 to Adtran 1234 no DHCP transfer

  - by Grico

  I am trying to set up a Cisco SA520 to run DHCP on my network. I have a vendor provided switch, the Adtran 1234, and it provides DHCP for our phone systems on VLAN 200. I do not have access to the Adtran, but the vendor gave me a IP on port 1 for WAN and said port 2 should be for the "trust" side should go. I did setup a mini lab where, Adtran 1 went to SA520 WAN port, and SA520 trust 1 went to my laptop. Everything worked fine, I could ping and get internet using the DHCP scope I put on the SA520. I then unplugged my computer from SA520 trust 1 and plugged it into Adtran 2. I plugged my computer into Adtran 23 and I dont get DHCP or even a link light. If I restart my machine, I get a brief link and then it dies once the machine boots. I have tried several ports on the Adtran and none seem to work. Different cables as well. However, when I plug a phone into the Adtran, the phone boot immediately and shows link. Thoughts?

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• allowing 2 VM's to communicate RED HAT 64 bit

  - by ????? ????????

  My physical PC is running 2 VMs on virtualbox. Both of the VM's are linux 64 bit. I am going through this tutorial: http://www.cyberciti.biz/faq/rhel-centos-fedoracore-linux-network-card-configuration/ in order to expose both of their IP's so that they can speak to each other. Mike Schwager November 25, 2009 at 10:55 pm Whoops! In section 3, you forgot about editing /etc/hosts. I believe RedHat comes complete with the system’s host ip address set up in /etc/hosts. Don’t forget to give it a look. I agree with Mike because after I looked into the /etc/hosts files, it has just default localhost stuff in it. How should I reconfigure the hosts file?

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• RHEL 5/CentOS 5 - sshd becomes unresponsive

  - by ewwhite

  I have a number of CentOS 5.x and RHEL 5.x systems whose SSH daemons become unresponsive, preventing remote logins. The typical error from the connecting side is: $ ssh db1 db1 : ssh_exchange_identification: Connection closed by remote host Examining /var/log/messages after a forced reboot shows the following leading up to the restart: Dec 10 10:45:51 db1 sshd[14593]: fatal: Privilege separation user sshd does not exist Dec 10 10:46:02 db1 sshd[14595]: fatal: Privilege separation user sshd does not exist Dec 10 10:46:54 db1 sshd[14711]: fatal: Privilege separation user sshd does not exist Dec 10 10:47:38 db1 sshd[14730]: fatal: Privilege separation user sshd does not exist These systems use LDAP authentication and the nsswitch.conf file is configured to look at local "files" first. [root@db1 ~]# cat /etc/nsswitch.conf # # /etc/nsswitch.conf # passwd: files ldap shadow: files ldap group: files ldap hosts: files dns The Privilege-separated SSH user exists in the local password file. [root@db1 ~]# grep ssh /etc/passwd sshd:x:74:74:Privilege-separated SSH:/var/empty/sshd:/sbin/nologin Any ideas on what the root cause is? I did not see any Red Hat errata that covers this.

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• Puppet: array in parameterized classes VS using resources

  - by Luke404

  I have some use cases where I want to define multiple similar resources that should end up in a single file (via a template). As an example I'm trying to write a puppet module that will let me manage the mapping between MAC addresses and network interface names (writing udev's persistent-net-rules file from puppet), but there are also many other similar usage cases. I searched around and found that it could be done with the new parameterised classes syntax: if implemented that way it should end up being used like this: node { "myserver.example.com": class { "network::iftab": interfaces => { "eth0" => { "mac" => "ab:cd:ef:98:76:54" } "eth1" => { "mac" => "98:76:de:ad:be:ef" } } } } Not too bad, I agree, but it would rapidly explode when you manage more complex stuff (think network configurations like in this module or any other multiple-complex-resources-in-a-single-config-file stuff). In a similar question on SF someone suggested using Pienaar's puppet-concat module but I doubt it could get any better than parameterised classes. What would be really cool and clean in the configuration definition would be something like the included host type, it's usage is simple, pretty and clean and naturally maps to multiple resources that will end up being configured in a single place. Transposed to my example it would be like: node { "myserver.example.com": interface { "eth0": "mac" => "ab:cd:ef:98:76:54", "foo" => "bar", "asd" => "lol", "eth1": "mac" => "98:76:de:ad:be:ef", "foo" => "rab", "asd" => "olo", } } ...that looks much better to my eyes, even with 3x options to each resource. Should I really be passing arrays to parameterised classes, or there is a better way to do this kind of stuff? Is there some accepted consensus in the puppet [users|developers] community? By the way, I'm referring to the latest stable release of the 2.7 branch and I am not interested in compatibility with older versions.

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• Having trouble with some media while using Firefox in Ubuntu.

  - by Christopher Chipps

  I just started using Firefox in Ubuntu today. While on Twitter, I noticed some avatars not showing up, but just their description as seen in the screen shot below. Any idea what could cause this? Also, I need to d/l Adobe Flash so I can get other media to work online. It gives me the option to d/l it but then takes me to the Flash file with no option to install. Any ideas with this as well? Thanks for looking into this!

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• Strange. Asterisk key plays random Windows sound when pressed

  - by Charles

  This is a new one on me. When I press the "asterisk", or * button on my number pad (but not SHIFT+8), Windows makes either a "Exclamation" or "Windows ding" sound. I haven't noticed a pattern to which sound is made. Logitech K200 keyboard No special key mapping software or Logitech software running Realtek sound to stereo through optical cable. Visual Studio 2010, Chrome, Fiddler, WinRAR, Notepad++, and Dropbox running. No unusual behavior otherwise. A solution isn't terribly important but my curiosity is both piqued and stumped. This doesn't normally happen and nothing odd has taken place otherwise. Ideas?

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• Accessing A Shared Directory That Has An Account White List

  - by Xan

  I'm on a LAN here at work and I have my desktop sharing some of my project folders. I can access the computer via \\ComputerIP\, but I can't actually open any of the folders. Upon attempting, I get the error: Windowns cannot access \ComputerIP\ProjectFolder You do not have permission to access \ComputerIP\ProjectFolder. Contact your network administrator to request access. For more information about permissions, see Windows Help and Support Now, this is understood considering I've made it so that you had to utilize the "Project" credentials to connect. I have a user account on my main computer hosting these shared folders that gives full access to the folders if you are this "Project" user. I can Remote Desktop the computer just fine from my laptop using either set of credentials. When I try to open these folders it doesn't give me the option to attempt to apply any credentials like it does when I remote desktop. How am I supposed to gain access to these folders?

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• Socket 1155 vs 2011 vs Haswell

  - by woody

  The title says it all. I am trying to decide between sockets and just cant pinpoint which to get based on pros and cons. The build this will go into will be my primary PC. It will be used for every day computing, coding, some multimedia and gaming. I have read that 1155 and 2011 will be dead within the new year and that Haswell will double the performance of Ivy Bridge. What is a general run down on the different sockets? Pros and Cons? More specifically what are the technical differences between the three?

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• Windows 8 scroll lag

  - by samayres1992

  Don't have an issue with the desktop experience, but when it comes to the apps, scrolling in some of them is impossible to use correctly. Very laggy and jumpy, which is surprising because my computer has relatively high specs, only a year old. Scrolling using the manual scroll bar has no lag whatsoever it's simply whenever I use my touchpad. Maybe it's a touchpad issue? or more likely windows 8 as it seems fine in desktop view for scrolling? Any ideas where the problem may lie? Thanks

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• Outlook Quick Steps - close email after selecting "Done"

  - by PeterX

  Is there a way for Outlook 2010 to close the currently opened-email (if it's in its own window) after I select "Done" from the Quick Steps item in the ribbon? I have investigated the Quick Step actions but I can't see anything applicable. I understand that the "Done" option is available even in the full Outlook window, so closing the current window wouldn't be appropriate here, but it'd be good if it could close it if the email was opened in a new window.

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• DIR filenames that contain extensions

  - by Synetech

  I was just trying to check a dump-directory for any ZIP programs like PeaZip, NanoZip, etc. and ran into an odd problem that I have seen only a few times before. I used the following command to list files whose filenames contain zip (e.g., nanozip.zip, peazip2.rar, winzip-beta.exe, etc.): dir *zip* This listed any files whose filenames contain zip, but also all files with a .zip extension (e.g., foobar.zip). I then tried the following: dir *zip*.* This gave the same results. Does anyone know of a way to get the expected results? (I know that for may be able to do it, but the output won’t be correct.)

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• No win 7 users available for login after dell datasafe factory reset

  - by user897052

  I created install discs using the Dell datasafe 2.0 backup utility in order to re-install windows on a friend's laptop (dell inspiron n5110). I ran the discs to do a factory reset. after the whole process, it booted, started loading windows 7, displayed the messages "setup is preparing your computer for first use" and "setup is checking video performance," and showed the login screen. However, there don't seem to be any active users on the machine - I opened a command prompt window to check the users on the machine. Using the command prompt (again, from the login window), i activated/enabled the administrator account, and even created another admin account, and upon logging in received several errors, couldn't load any mmc's, etc. any help would be appreciated.

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• How can you invert the colors of a PDF?

  - by legr3c

  I need to invert all the colors of a PDF document (background, text, graphics, and images). I want it persistent in the file so the inverted viewing options, that some viewers offer, won't help. Rasterizing the document and using image manipulation software is also not an option. I read somewhere that this can be done with the Enfocus PitStop plugin for Acrobat. However I didn't see a corresponding command anywhere. Am I missing something? Then I read that the ARTS PDF Crackerjack plugin for Acrobat offers negative printing so I tried that, too. The option is there but it simply doesn't work. I have been searching for very long for a way to do this. It seems like a common enough task but I just can't find out how to do it. Are there maybe any virtual printer drivers or something of the sort that support negative printing? Can anyone help?

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• Google Chrome does not launch after some months without using it in Windows XP/Seven

  - by kokbira

  Well, I have in computers I use with Windows XP or Seven more than one browser installed on them, generally Internet Explorer 8, Firefox 4, Opera 11 and Google Chrome. I often use Firefox, but I want to use Google Chrome sometimes because I have a lot of addons and webapps on it. The issue is: when I try to execute Chrome after some months without using it, it does not function. Using Proccess Explorer or Task Manager, I can see that there is not any Google proccesses running. Then I reinstall it and all functions. But if I do not use it for some months again, it will not function... Is it an update problem? Must I use Chrome everyday or is there another way to avoid that issue? PS: I installed English and Portuguese last versions (how to get the version numbers when it does not execute?), not at the same time, and it continues to do not launch... PS2: There is a running Google Update proccess that is launched in startup: HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run    Name:            Google Update    Type:            REG_SZ    Data:            "C:\Users\Ubirajara\AppData\Local\Google\Update\GoogleUpdate.exe" /c

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