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  • Starting nginx with systemctl fails, but running the command manually doesn't

    - by Ivan
    On Arch Linux, for some reason, when I try to start nginx with the command "systemctl start nginx", it fails, with this being the output of "systemctl status nginx": Loaded: loaded (/etc/systemd/system/nginx.service; enabled) Active: failed (Result: exit-code) since Wed 2013-10-30 16:22:17 EDT; 5s ago Process: 9835 ExecStop=/usr/bin/chroot --userspec=http:http /home/nginx /usr/bin/nginx -g pid /run/nginx.pid; -s quit (code=exited, status=126) Process: 3982 ExecStart=/usr/bin/chroot --userspec=http:http /home/nginx /usr/bin/nginx -g pid /run/nginx.pid; daemon on; master_process on; (code=exited, status=0/SUCCESS) Process: 10967 ExecStartPre=/usr/bin/chroot --userspec=http:http /home/nginx /usr/bin/nginx -t -q -g pid /run/nginx.pid; daemon on; master_process on; (code=exited, status=126) Main PID: 3984 (code=exited, status=0/SUCCESS) CGroup: /system.slice/nginx.service ...but when I run /usr/bin/chroot --userspec=http:http /home/nginx /usr/bin/nginx -t -q -g "pid /run/nginx.pid; daemon on; master_process on;" and then /usr/bin/chroot --userspec=http:http /home/nginx /usr/bin/nginx -g "pid /run/nginx.pid; daemon on; master_process on;" as root, all it does is return a warning, but works just fine: nginx: [warn] the "user" directive makes sense only if the master process runs with super-user privileges, ignored in /etc/nginx/nginx.conf:1 Why is it doing that?

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  • my X server doesn't load a module called "glx", but my video drivers seem to be installed

    - by rumtscho
    I just got a new, very wide monitor (2560x1440) and there is no sense maximizing my applications. So I installed Compiz Config Settings Manager and enabled Grid. Nothing happened, the shortcuts don't move application windows. Went to System - Preferences - Appearance, the Visual effects tab. It at "disabled". When I try to set them to "normal" or "extra", a message box appears telling me that it's searching for video drivers, then disappears, and I get an error message "Desktop effects could not be enabled". I opened Xorg.0.log, and had errors there: (EE) Failed to load /usr/lib/xorg/modules/extensions//libglx.so (II) UnloadModule: "glx" (EE) Failed to load module "glx" (loader failed, 7) (II) LoadModule: "extmod" Going to Administration - System - Hardware drivers, it said that there are no available and/or installed hardware drivers. But apt-get said that it cannot install nvidia-glx-185, as it is already installed. Googling my error message suggested that I install and run something called envyng. This let me install the nvidia drivers again, and now I can see in the Hardware Drivers window that they are installed and active. But the error message in Xorg.0.log remains, and I still cannot enable the Compiz effects or use Grid. Now, I don't have enough Linux experience to understand if this is a single cause-effect-chain of problems, or three independent ones, but I'd appreciate help for any of them. I am running Ubuntu 9.10, the video card is a GeForce 7600GS.

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  • App for family tech support tracking?

    - by slothbear
    I do tech support for several groups within my family. They usually have a document or notebook of questions for me. They often record my advice, but then ask me again later. Some communications are by email (nice record for me, although they never think to search). Some sessions are in person, usually with a followup email from me for the record. Which they forget about. I'm not trying to force them to be more 'professional', but I would like to streamline my support a bit, and give them a place to look for past answers. Some of them would like a standard place like that, rather than reasking me the same questions. The solution has to be free. And web-based, although email-in for questions would be great. I'll be doing most (all?) updating of the system. Mobile/iPhone access would be nice, but not required. Ideally, a system with topics and responses would be good, but I'd need a way to promote one response as 'the answer'.

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  • How to hide subfolder when using Web.config for subdomains?

    - by mc-kay
    I have FTP access to my ASP.NET Websapce (IIS 7) and I route subdomains with a Web.config in the web root folder. She looks like this: <?xml version="1.0" encoding="UTF-8"?> <configuration> <system.webServer> <rewrite> <rules> <rule name="route www and emtpy requests" stopProcessing="true"> <match url=".*" /> <conditions logicalGrouping="MatchAll" trackAllCaptures="false"> <add input="{HTTP_HOST}" pattern="^(www.)?example.com" /> <add input="{PATH_INFO}" pattern="^/www/" negate="true" /> </conditions> <action type="Rewrite" url="\www\{R:0}" /> </rule> <rule name="route to blog" stopProcessing="true"> <match url=".*" /> <conditions logicalGrouping="MatchAll" trackAllCaptures="false"> <add input="{HTTP_HOST}" pattern="^blog.example.com$" /> <add input="{PATH_INFO}" pattern="^/blog/" negate="true" /> </conditions> <action type="Rewrite" url="\blog\{R:0}" /> </rule> </rules> </rewrite> </system.webServer> </configuration> As you can see i have two folders in my root directory: "www" and "blog". When i now enter "blog.example.com" everythink is working fine, but when i click a link i will go to "blog.example.com/blog" What can I do to prevent this behavior ?

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  • Prevent outgoing traffic unless OpenVPN connection is active using pf.conf on Mac OS X

    - by Nick
    I've been able to deny all connections to external networks unless my OpenVPN connection is active using pf.conf. However, I lose Wi-Fi connectivity if the connection is broken by closing and opening the laptop lid or toggling Wi-Fi off and on again. I'm on Mac OS 10.8.1. I connect to the Web via Wi-Fi (from varying locations, including Internet cafés). The OpenVPN connection is set up with Viscosity. I have the following packet filter rules set up in /etc/pf.conf # Deny all packets unless they pass through the OpenVPN connection wifi=en1 vpn=tun0 block all set skip on lo pass on $wifi proto udp to [OpenVPN server IP address] port 443 pass on $vpn I start the packet filter service with sudo pfctl -e and load the new rules with sudo pfctl -f /etc/pf.conf. I have also edited /System/Library/LaunchDaemons/com.apple.pfctl.plist and changed the line <string>-f</string> to read <string>-ef</string> so that the packet filter launches at system startup. This all seems to works great at first: applications can only connect to the web if the OpenVPN connection is active, so I'm never leaking data over an insecure connection. But, if I close and reopen my laptop lid or turn Wi-Fi off and on again, the Wi-Fi connection is lost, and I see an exclamation mark in the Wi-Fi icon in the status bar. Clicking the Wi-Fi icon shows an "Alert: No Internet connection" message: To regain the connection, I have to disconnect and reconnect Wi-Fi, sometimes five or six times, before the "Alert: No Internet connection" message disappears and I'm able to open the VPN connection again. Other times, the Wi-Fi alert disappears of its own accord, the exclamation mark clears, and I'm able to connect again. Either way, it can take five minutes or more to get a connection again, which can be frustrating. Why does Wi-Fi report "No internet connection" after losing connectivity, and how can I diagnose this issue and fix it?

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  • Why do my backup fail when I target a network share hosted by a Synology DS211 disk station?

    - by Larry
    My backups are failing when I try to use a network share hosted by a Synology DS211 disk station. They work fine if I target a different network share (i.e. \server1\data\larry). When I run the following command: Wbadmin start backup -backupTarget:\\diskstation\backup-larry -include:C: This is what I get: wbadmin 1.0 - Backup command-line tool (C) Copyright 2004 Microsoft Corp. Note: The backed up data cannot be securely protected at this destination. Backups stored on a remote shared folder might be accessible by other people on the network. You should only save your backups to a location where you trust the other users who have access to the location or on a network that has additional security precautions in place. Retrieving volume information... This will back up volume WIN7(C:) to \\diskstation\backup-larry. Do you want to start the backup operation? [Y] Yes [N] No y Note: The list of volumes included for backup does not include all the volumes that contain operating system components. This backup cannot be used to perform a system recovery. However, you can recover other items if the destination media type supports it. The backup operation to \\diskstation\backup-larry is starting. Creating a shadow copy of the volumes specified for backup... Creating a shadow copy of the volumes specified for backup... The backup operation stopped before completing. Summary of the backup operation: ------------------ The backup operation stopped before completing. Detailed error: Access is denied. Windows Backup failed to write the file: '<backup location>\WindowsImageBackup\<Computer Name>\MediaId'. Access is denied. The backup creates the following path \\diskstation\backup-larry\WindowsImageBackup\LARRY-MYDOMAIN\ but its empty. I definitely have read/write access on the target directory (\diskstation\backup-larry). I have verified this by looking at the permission and by actually copying files to this location. Any suggestions?

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  • how to set cache control to public in iis 7.5

    - by ivymike
    I'm trying to set cache control header to max age using the following snippet in my web.config: <system.webServer> <staticContent> <clientCache cacheControlMode="UseMaxAge" cacheControlMaxAge="1.00:00:00" /> </staticContent> </system.webServer> Some how this isn't being reflected in the response. Instead I see a Cache-Control: private header on the responses. I'm using NancyFx framework (which is a layer on top of Asp.net). Is there any thing else I need to do ? Below are the reponse headers I receive: HTTP/1.1 200 OK\r\n Cache-Control: private\r\n Content-Type: application/x-javascript\r\n Content-Encoding: gzip\r\n Last-Modified: Mon, 19 Mar 2012 16:42:03 GMT\r\n ETag: 8ced406593e38e7\r\n Vary: Accept-Encoding\r\n Server: Microsoft-IIS/7.5\r\n Nancy-Version: 0.9.0.0\r\n Set-Cookie: NCSRF=AAEAAAD%2f%2f%2f%2f%2fAQAAAAAAAAAMAgAAADxOYW5jeSwgVmVyc2lvbj0wLjkuMC4wLCBDdWx0dXJlPW5ldXRyYWwsIFB1YmxpY0tleVRva2VuPW51bGwFAQAAABhOYW5jeS5TZWN1cml0eS5Dc3JmVG9rZW4DAAAAHDxSYW5kb21CeXRlcz5rX19CYWNraW5nRmllbGQcPENyZWF0ZWREYXRlPmtfX0JhY2tpbmdGaWVsZBU8SG1hYz5rX19CYWNraW5nRmllbGQHAAcCDQICAAAACQMAAADTubwoldTOiAkEAAAADwMAAAAKAAAAAkpT5d9aTSzL3BAPBAAAACAAAAACPUCyrmSXQhkp%2bfrDz7lZa7O7ja%2fIg7HV9AW6RbPPRLYLAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA%3d; path=/; HttpOnly\r\n X-AspNet-Version: 4.0.30319\r\n Date: Tue, 20 Mar 2012 09:44:20 GMT\r\n Content-Length: 1624\r\n

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  • SSO "Portal"

    - by Clinton Blackmore
    Pursuant to my question on alleviating the password explosion, I've contacted some of the services to whom we are paying money to access their websites to ask if we could authenticate our own users, and some of them said yes and send me specs on how to do so. (One of the sites called such a system a page a "portal"; I've never heard the term used in quite that way.) It is simple enough that I am tempted to roll my own. The largest complication is that one site wants us to store a key for every user in our database (and I think the LDAP database makes sense) after their initial login. So, non-trivial, but doable. The nature of these sorts of tasks, I expect, is that if they start out small and simple, they don't end that way. There must be some software that addresses this that is readily extended, surely. In my searching, I've come across: SimpleSAMLphp JOSSO RubyCAS-Server Shibboleth Pubcookie OpenID [Wow, gee. I'd missed some of those in my previous searches! The wikipedia page on Central Authentication Services is useful, and the section on Alternatives to OpenID makes it look like there is a lot of choice.] Can anyone recommend any of these, or suggest ones to avoid? Internally, we are authenticating using Apple's Open Directory [ == OpenLDAP + Kerberos + Password Server (which, I believe, == SAML) ]. As far as extending/tweaking/advanced configuration of a system, I am able to program in Python, C++, can do some basic PHP, and may be able to remember some Java. Looks like I need to pick up Ruby at some point. Addendum: I would also like users to be able to change their passwords over the web (and for certain users to change passwords of other users).

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  • Why do messenger keeps coming up when I adjust screen brightness?

    - by Asaf R
    My Dell Studio XPS 13 has a brightness up & down buttons (Fn + up arrow / down arrow), as do most laptops have. It's running Windows 7 64bit and I've installed Windows Live Messenger (build 14 and something) on it. When I hit Fn + down arrow, to reduce screen brightness, the Messenger window pops up. That's true whether it has been running in background (system tray / minimized) before or not. Note, to make messenger hide itself to the system tray, I've set it to Vista Compatibility mode. I don't think that has anything to do with it though, since if I shut compatibility mode off, the problem persists. There's a thread on the matter here, but with no solution. Thanks, Asaf SOLUTION: Stop Intellitype when using internal keyboard. See detailed howto here. EDIT: Some new findings on the matter - If I exit messenger entirely and restart (or simply stop) the service "Windows Live ID Sign-in Assistant" the problem is solved until I run messenger again. It persists even after entirely closing messenger, until I restart the said service. EDIT2: The above service "Windows Live ID Sign-in Assistant" actual name is wlidsvc. There's no shortcut defined for messenger, nor is there any other hot key in its preferences. EDIT3: I'm not sure if it's relates, but some of the Fn keys are not working - Fn + F1 doesn't put the machine to sleep, Fn + F3 doesn't show battery status. EDIT4: Problem probably relates to conflict with IntelliType Pro. See my answer below. Said conflict also causes Undo command when disabling Wireless (Wireless touch button), and other side effects for various keys.

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  • Unable to remove Read-Only attribute from folder in Windows XP

    - by elcuco
    I have this directory which I cannot remove the read only attribute from. The computer is running XP SP2 (or SP3, not sure) and the directory sits in a NTFS file system. Looking into the web I found this: http://support.microsoft.com/kb/256614 which tells that if the directory is "customized" it's treated as a system folder and thus "read only". I don't think this is a scenario in my case, but anyway it's not helping, their recommendation is more or less: attr -r -s /d /s d:\data and this is not working for me. Any other ideas? More info: The directory is served to an HTTP server (wamp) and the directory is an SVN check out. What happens is that the web server cannot write files into the directory (imagechace from drupal is you are really interested). Edit 2: The original post claimed that the directory sits on a VFAT FS, however I booted Fedora 11 from livecd and the partition is marked as NTFS. Edit 3: I left the company which I worked on, on which this situation happened... so I cannot fully close this question. But things get even worse: I tested the "attr -r" answer I put, it did not work for me, and now the developer said that it worked for her. A nice WTF moment. Probably a reboot helped... Sorry for loosing details. If anyone has the same problem, and one of the answers helps him - please comment.

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  • Windows XP only loads in VGA mode, and crashes when raising resolution

    - by Harel
    My kid's computer (Windows XP, SP3) started to (what appears to be) crash on boot. It will only boot in Safe or VGA mode, and if I try to raise the resolution from 640x480 it just reboots itself, and a error appears in the Event Log. When it loads up not in VGA mode, the monitor shuts off just after the windows logo is shown. It seems like windows is actually running but I can't see anything on screen (monitor is off for lack of signal). Nothing was installed recently that I know of, short of the usual windows updates. Thanks, Harel Below is the event log error: Event Type: Error Event Source: System Error Event Category: (102) Event ID: 1003 Date: 15/04/2012 Time: 16:27:11 User: N/A Computer: ----- Description: Error code 1000008e, parameter1 c0000005, parameter2 f745b0bf, parameter3 ede24f98, parameter4 00000000. For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp. Data: 0000: 53 79 73 74 65 6d 20 45 System E 0008: 72 72 6f 72 20 20 45 72 rror Er 0010: 72 6f 72 20 63 6f 64 65 ror code 0018: 20 31 30 30 30 30 30 38 1000008 0020: 65 20 20 50 61 72 61 6d e Param 0028: 65 74 65 72 73 20 63 30 eters c0 0030: 30 30 30 30 30 35 2c 20 000005, 0038: 66 37 34 35 62 30 62 66 f745b0bf 0040: 2c 20 65 64 65 32 34 66 , ede24f 0048: 39 38 2c 20 30 30 30 30 98, 0000 0050: 30 30 30 30 0000

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  • Optical Audio out stuck on on a MacBook

    - by Clinton Blackmore
    Apple have made an interesting headphone port for the MacBook (and some other Intel Mac models). It works like a standard jack: nothing plugged in - audio comes out of built-in speakers headphones/external speakers plugged in - plays through headphones/external speakers but you can also use a special adapter (which trips a tiny microswitch) to get an optical audio out signal (which you can presumably plug into a nice surround-sound system). This is all well and good except when, like auto-tracking, it doesn't work, and you are left with nothing to adjust. Users report that they get no sound when they have nothing plugged in and that a red light emanates from the headphone port. If you go to System Preferences - Sound - Output, it will say (IIRC) "Optical Out" instead of "Internal Speakers". The only solution I'm aware of is to try to reset the switch by inserting and removing a set of headphones or a toothpick, perhaps wiggling it inside of the port, and hoping that you luck out and get it. Are there other ways to fix this problem? Does anyone know where the microswitch is or have a good technique to reset it?

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  • Securing SSH/SFTP and best practices on security

    - by MultiformeIngegno
    I'm on a fresh VPS with Ubuntu Server 12.04. I wanted to ask you the good practices to apply to enhance security over a stock Ubuntu-server. This is what I did up to now: I added Google Authenticator to SSH, then I created a new user (whom I'll use instead of 'root' for SSH & SFTP access) which I added to my /etc/sudoers list below 'root', so now it's: # User privilege specification root ALL=(ALL:ALL) ALL new_user ALL=(ALL:ALL) ALL Then I edited sshd_config and set PermitRootLogin to 'no'. Then restarted the ssh service. Is this ok? There are a few things I'd like to ask you though: 1) What's the sense of adding a new (sudoer) user whilst the root user still exist (ok it can't access with root privilege but it's still there..)? 2) System files are owned by 'root'.. I want to use my new_user to access via SFTP but with it I can't edit those files!! Should I mass-CHMOD 'em so that new_user has write perms too? What's the good practice on this? Thanks in advance, I hope you'll tell me if I did something wrong and/or other ways to secure the system. :)

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  • Tracking down source of duplicate email messages in Outlook / Exchange environment

    - by Ken Pespisa
    I have a few users, who are also Blackberry users, that occasionally have duplicate emails generated from their "mailbox". I put mailbox in quotes because I'm not exactly sure where the duplicates are created. One of these users is in non-cached mode, and the other is in cached mode, and both experience the problem. In fact, the non-cached mode user was originally experiencing the problem while in cached mode, and I made the switch a few weeks ago to attempt to solve the problem. Today I discovered the issue still exists. I'm not sure if the fact that they are blackberry users could be causing the problem at all. I don't see how, but felt I should mention it anyway. Does anyone have ideas on how I might begin to troubleshoot this? I can see in the non-cached user's mailbox "Sent Items" that the message was sent only once. I confirmed the message does not state that there was a conflict and in fact that makes sense because they are in non-cached mode. On the server, we have a mail journaling feature turned on for our third-party mail archiving system, and I can see that that system sees two sent messages. And likewise, the recipient does in fact have two messages in their inbox with consecutive message IDs ([email protected]) and ([email protected]). It would seem to me that the duplicates are generated on the client, but is there a way to tell for sure?

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  • Not able to find scripts present in /etc/profile.d directory [on hold]

    - by priya
    I am using Red Hat Linux 6.0 ... using davinchi board. I have to change system clock resolution so I am changing (HZ) env var. For this I have written script so that I can change HZ = 1000 n insert that script in /etc/profile.d and write code for loop in /etc/profile so that while running as usual /etc/profile can load the scripts present in /etc/profile.d. But when I am logging into the system at root level then showing error as "-bash: ./etc/profile.d/resolution.sh(my script name): No such file or directory Also here why it is showing ./etc and not /etc . Is something related to that?? Also I tried to add script in /etc/init.d but still no change in value of HZ takes place. Please tell where to change so that this env var can get changed. The script(resolution.sh) written has :- #!/bin/bash export HZ=1000 The content of /etc/profile which I entered is: if [ -d /etc/profile.d ]; then for i in /etc/profile.d/*.sh; do if [ -r $i ]; then .$i fi done unset i fi And the output of grep command is -rw-r--r-- 1 root root 535 Feb 4 2004 profile -rwxr-xr-x 2 root root 4096 Feb 2 2004 profile.d

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  • How can you connect to a SQL Server not on your domain?

    - by scotty2012
    I have a test machine that's not allowed on our domain because we are testing corporately unsupported applications (SQL 2008 and Server 2008). I want to use management studio to connect to the SQL2008 server but can't get it working. I have authentication set to mixed-mode, I've checked 'allow remote connections to this server', but when I try to access it, I get the error A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) (Microsoft SQL Server, Error: 53) Since it says the provider is Named Pipes, I enabled Named Pipes on the server, but still no dice. I've tried connecting to the system name, the IP, the system name\instance and IP\instance, all to no avail. Is what I'm trying to do not possible? Edit: Well, through some basic troubleshooting, I've found that I can't ping the server from my client computer, but I can ping the client computer from the server? They are both plugged into the same switch, and are sitting next to each other. The windows firewall on the server is turned on, is there some specific settings I need to enable? DAH! So it was the firewall blocking me. How can I enable the firewall and still connect?

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  • How to read cell data in excel and output to command prompt

    - by Max Ollerenshaw
    Hi All, I'm a sys admin and I am trying to learn how to use powershell... I have never done any type of scripting or coding before and I have been teaching myself online by learning from the technet script centre and online forums. What I am trying to accomplish is to open an excel spreadsheet get information from it (usernames and password) and then output it into the command prompt in powershell. When ever I try to do this I get an Exception calling "InvokeMember" anyway, here is the code I have so far: function Invoke([object]$m, [string]$method, $parameters) { $m.PSBase.GetType().InvokeMember( $method, [Reflection.BindingFlags]::InvokeMethod, $null, $m, $parameters,$ciUS ) } $ciUS = [System.Globalization.CultureInfo]'en-US' $objExcel = New-Object -comobject Excel.Application $objExcel.Visible = $False $objExcel.DisplayAlerts = $False $objWorkbook = Invoke $objExcel.Workbooks.Open "C:\PS\User Data.xls" Write-Host "Numer of worksheets: " $objWorkbook.Sheets.Count $objWorksheet = $objWorkbook.Worksheets.Item(1) Write-Host "Worksheet: " $objWorksheet.Name $Forename = $objWorksheet.Cells.Item(2,1).Text $Surname = $objWorksheet.Cells.Item(2,2).Text Write-Host "Forename: " $Forename Write-Host "Surname: " $Surname $objExcel.Quit() If (ps excel) { kill -name excel} I have read many different posts on forums and articles on how to try and get around the en-US problem but I cannot seem to get around it and hope that someone here can help! Here is the Exeption problem I mentioned: Exception calling "InvokeMember" with "6" argument(s): "Method 'System.Management.Automation.PSMethod.C:\PS\User Data.x ls' not found." At C:\PS\excel.ps1:3 char:33 + $m.PSBase.GetType().InvokeMember <<<< ( + CategoryInfo : NotSpecified: (:) [], MethodInvocationException + FullyQualifiedErrorId : DotNetMethodException Numer of worksheets: You cannot call a method on a null-valued expression. At C:\PS\excel.ps1:18 char:45 + $objWorksheet = $objWorkbook.Worksheets.Item <<<< (1) + CategoryInfo : InvalidOperation: (Item:String) [], RuntimeException + FullyQualifiedErrorId : InvokeMethodOnNull Worksheet: You cannot call a method on a null-valued expression. At C:\PS\excel.ps1:21 char:37 + $Forename = $objWorksheet.Cells.Item <<<< (2,1).Text + CategoryInfo : InvalidOperation: (Item:String) [], RuntimeException + FullyQualifiedErrorId : InvokeMethodOnNull You cannot call a method on a null-valued expression. At C:\PS\excel.ps1:22 char:36 + $Surname = $objWorksheet.Cells.Item <<<< (2,2).Text + CategoryInfo : InvalidOperation: (Item:String) [], RuntimeException + FullyQualifiedErrorId : InvokeMethodOnNull Forename: Surname: This is the first question I have ever asked, try to be nice! :)) Many Thanks Max

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  • Best tool for monitoring backups, etc. and trending statstics from that data

    - by Randy Syring
    I have done some research on nagios, opennms, and zenoss but am not confident that I have found what I am looking for. The main driving force for me right now is being able to monitor backups. This includes mysql, mssql, and eventually some file system backups. We have a tool that wraps the backup process for these different systems and collects statistics. So, items like: number of databases backed up size of db backup file size of db backup file compressed time to make backup time to zip file I want to be able to A) have notifications if the jobs are not run according to schedule B) be able to set thresholds on the statistics which would trigger notifications C) I want to be able to trend and graph the statistics I am planning on sending this information to the monitoring application through an HTTP POST. Or, the monitoring application could pull it from a log file as well. However, we will have other processes with other "arbitrary" (from the monitoring system's perspective) statics that will want to monitor and trend, so flexibility is very important. The tool or tools should also be able to do general monitoring and trending of network interfaces, server load, etc. Once we get the backup monitoring in place, we will want to include those items as well. Thanks.

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  • How would you gather client's data on Google App Engine without using Datastore/Backend Instances too much?

    - by ruslan
    I'm relatively new to StackExchange and not sure if it's appropriate place to ask design question. Site gives me a hint "The question you're asking appears subjective and is likely to be closed". Please let me know. Anyway.. One of the projects I'm working on is online survey engine. It's my first big commercial project on Google App Engine. I need your advice on how to collect stats and efficiently record them in DataStore without bankrupting me. Initial requirements are: After user finishes survey client sends list of pairs [ID (int) + PercentHit (double)]. This list shows how close answers of this user match predefined answers of reference answerers (which identified by IDs). I call them "target IDs". Creator of the survey wants to see aggregated % for given IDs for last hour, particular timeframe or from the beginning of the survey. Some surveys may have thousands of target/reference answerers. So I created entity public class HitsStatsDO implements Serializable { @Id transient private Long id; transient private Long version = (long) 0; transient private Long startDate; @Parent transient private Key parent; // fake parent which contains target id @Transient int targetId; private double avgPercent; private long hitCount; } But writing HitsStatsDO for each target from each user would give a lot of data. For instance I had a survey with 3000 targets which was answered by ~4 million people within one week with 300K people taking survey in first day. Even if we assume they were answering it evenly for 24 hours it would give us ~1040 writes/second. Obviously it hits concurrent writes limit of Datastore. I decided I'll collect data for one hour and save that, that's why there are avgPercent and hitCount in HitsStatsDO. GAE instances are stateless so I had to use dynamic backend instance. There I have something like this: // Contains stats for one hour private class Shard { ReadWriteLock lock = new ReentrantReadWriteLock(); Map<Integer, HitsStatsDO> map = new HashMap<Integer, HitsStatsDO>(); // Key is target ID public void saveToDatastore(); public void updateStats(Long startDate, Map<Integer, Double> hits); } and map with shard for current hour and previous hour (which doesn't stay here for long) private HashMap<Long, Shard> shards = new HashMap<Long, Shard>(); // Key is HitsStatsDO.startDate So once per hour I dump Shard for previous hour to Datastore. Plus I have class LifetimeStats which keeps Map<Integer, HitsStatsDO> in memcached where map-key is target ID. Also in my backend shutdown hook method I dump stats for unfinished hour to Datastore. There is only one major issue here - I have only ONE backend instance :) It raises following questions on which I'd like to hear your opinion: Can I do this without using backend instance ? What if one instance is not enough ? How can I split data between multiple dynamic backend instances? It hard because I don't know how many I have because Google creates new one as load increases. I know I can launch exact number of resident backend instances. But how many ? 2, 5, 10 ? What if I have no load at all for a week. Constantly running 10 backend instances is too expensive. What do I do with data from clients while backend instance is dead/restarting? Thank you very much in advance for your thoughts.

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  • Dell Dimension 8400 Startup error

    - by Michael
    Hello all, thanks first for taking the time to read this and possibly help me...... now I am pretty decent of a computer tech...but not enough. I am having an issue with my computer which is running windows xp and as I mentioned it is a dell Dimension 8400. as soon as I power the system up the fan goes into hyper drive (spins like crazy and is very loud) then the start up screen with dell comes up and the loading bar gets stuck on the process of "Bios Revision A00" and never loads beyound that. I have read alot about it and think that the main problem was that it can not locate the file (which does have an updated version) I think it is A09. I can not enter safe mode, Bios mode or anything. I do have the file on my other computer and I was wondering if there is a way that I can use a usb flash drive (as I have read on other sites) to create a bootable MS-Dos diskette but I am failing at creating as such....is this possible? or is there anything else I can do? I tried to remove the battery from the system for about 10 minutes while it was completely unplug and tried then to reboot it and go into the bios menu but the same thing keeps happening....can anyone help me :-(

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  • How to serve pages through multiple frameworks/template engines efficiently

    - by Leftium
    I would like to render a file that has both PHP tags and Web2Py tags mixed together. To do this, I would like the web server to pass the file through Web2Py, then PHP. I found a method to call PHP from Web2py via Python (based on this method for running PHP on top of django), but this method loses the benefits of any server optimizations from mod_php or FastCGI like caching and multi-threaded operation. A new process is created for each PHP request, which is very slow. Is there a better way to efficiently render pages with both Web2Py(Python) and PHP tags in the same file? Note I am not looking for methods of serving PHP-only and Web2Py-only files from the same server/domain. I prefer solutions for Apache2 or Cherokee. I'm open to using other web servers, though. Background info: I prefer to develop in Web2Py, but we have this pre-existing system written in PHP. I would like to augment the PHP system with some of Web2Py's features like auth authentication/user management and the T() internationalization object. Also it would make it much easier to port the PHP project to Web2Py if it could be done piecemeal. Since the PHP project consists of many files, it would greatly help if they did not need modification.

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  • What's next for all of these Microsoft "overlapping" and "enhanced" products ?

    - by indyvoyage
    Recently I attended a road show, organised by MS Gold Partner company in the UK. The products discussed were: SharePoint server (2010 and 2007), Exchange server, Office Communication Server 2007, Exchange hosted services Office Live meeting, Office Communicator, System Center Configuration Manager and Operation Manager, VMware, Windows 7 etc. As Microsoft claims the enhancement in the each product against higher version, I felt that clients are not much interested in all these details. For example Office Communicator, surely they have improved a lot the product and first site all said 'WOW' great product, but nobody wish to pay money for all these extra features. Some argued, they are bogged down by all these increased number of menus. They don't need soft call feature included with mobile call. It apply for all other products as well such as MS office (next what 2 ribbons ?), windows OS and many more. Indeed there must be good features in all these products, but is it worth to spend money and time to update the older system ? Also sometimes these feature will decrease the productivity instead increase it. *So do you think what ever enhancement MS is doing in the products is only for selling purpose, not a real use ?? and I think also keep the developer busy learning the new tools and features. * I am sure some some people here will argue that some people need this sort of features. But I am not talking about NASA or MI5 guys. I am talking of usual businesses and joe public. Any ideas welcome.

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  • Windows XP Setup Fails to Recognize USB Floppy after formatting AHCI disk

    - by Strahn
    I am attempting to install Windows XP Professional x64 onto a HP EliteBook 8540w. I have downloaded both the latest Intel Rapid Storage Technology drivers and the Intel Storage Matrix drivers that are listed on HPs website and copied the drivers over to a floppy disk (two separate floppies, one for each version of the drivers.) Booting to my WinXP Pro x64 install CD, I go through the F6 process, load the driver and am able to see my HDD, delete, create and format partitions on it. When I go to continue the install, after checking the disk, the system asks me to enter the disk labeled "Intel Rapid Storage Technology" and press enter to continue. Nothing happens at this point when I press enter. This happens if I use the latest drivers or the older drivers. We have created a slipstreamed install CD using nLite that has the AHCI drivers integrated, which installs fine. However, we have identified a number of issues with the system that I believe are side-effects of using nLite for the slipstreaming and I am attempting to verify that. I have researched this issue and found a few examples of others having the same problem, but no solution. The USB floppy is a Lacie branded floppy, connecting it to a working XP workstation shows it to be the Y-E Data USB floppy drive that is supposedly 100% compatible with XP per MS KB 916196.

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  • SSD seems dead after wakeup from Windows Sleep, BIOS stalls but doesn't find it anymore

    - by Abel
    The morning, the following scary scenario happened: I woke up my Windows system Typed in my username and got an error (something like "could not load security xxx", but unsure of exact wording) System auto-restarted after cliking OK It didn't boot up anymore to the SSD with Windows 7 OS (I have another disk I can boot to, but that doesn't see the disk either). Obviously, this happened right after I instantiated a backup procedure, which hasn't succeeded either. The BIOS can't find the drive when I connect to SATA. And it can't find the drive when I connect it to SAS. I have a Dell Workstation T7400, most recent BIOS (version A06), version of SAS Host Bus Adapter BIOS (HBA) is MPTBIOS 6.14.10.00 (2007.09.29) from LSI Logic Corp. Other findings: When connecting to SATA, the DELL Logo screen stays really long (5 minutes) and then at the end of POST it says that a drive is not found When connecting to SAS, the SAS HBA initializing phase takes long (2 minutes, against normally 15 seconds) When running Dell Diagnostics, it doesn't finish and gives the error Exception occurred in module MPCACHE.MDM file "IOAPICSP.ASM" line 1645. I contacted Dell. On their advice I tried different slots and different cables to no avail. I use an APIC battery power, spikes in the power are thus unlikely. My conclusion so far: the disk is dead. I need this disk very badly because it contains the last few days of important development of which not all code was checked in the moment this happened. Are there any ways to recover dead SSD drives? The drive is a new X25-M G2 160GB model SSDSA2M160G2GC 2.5" in an extension bay and has been running without issues for 3 months on SAS.

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  • So who decided VGA cables should be symetrical ? [closed]

    - by mgb
    < rant So who decided that VGA cables should be the same gender connector at both ends? I just spent an hour trying to fix a server that would apparently boot but wouldn't display any post messages - I needed to change some bios settings. The monitor gives me a helpful error message - "unable to display this resolution". Wondering how it can't show simple VGA res, I reset the bios, when that doesn't work I remove the BIOS battery. The system is in a rack with a keyboard and monitor mounted 6ft away - with the cable running through the normal waist thick rats nest of wiring of wiring. The monitor worked with another system, so it and the VGA cable are good, I brought in another monitor and tried that - still nothing. Eventually I ripped the rack apart to discover that the other end of the VGA connector I was trying to plug into the server was actually plugged into another server box ! And the second monitor I was testing was plugged into the first monitor. An error message like - "I'm actualy plugged into another monitor stupid" - would be useful. So would having a connector with a male end and a female end. < end rant - thank you

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