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  • How should I capture Linux kernel panic stack traces?

    - by Alnitak
    What's current best practice to capture full kernel stack traces on a Linux system (RHEL 5.x, kernel 2.6.18) that occasionally panics in a device driver? I'm used to the "old" SunOS way of doing things - crash dumps get written to swap, and on reboot the dump gets retrieved in the local file system. man 8 crash refers to diskdump, but that appears to be unsupported. and/or deprecated. I've played with kdump, but it's unclear whether I can get a stack trace from that. Triggering a panic via Magic SysRq didn't create one. It also seems wasteful to reserve so much memory (128MB) just for a kexec crash recovery kernel.

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  • install Adobe® Acrobat 9 Pro error

    - by Tim
    My OS is Windows 7. I try to download Adobe® Acrobat 9 Pro for English and Windows (326.6MB) by its Akamai Download Manager and then click on "Install Now". But I meet some error: "Action center.lnk" is a file which was downloaded from the internet. Are you sure you want to open it? I click yes, but then: Launching File Failed: se_err_accessdenied Anyone has some idea why and how to fix it? Thanks and regards!

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  • Free / Cached / Available memory on Linux

    - by pkoraca
    I have read that linux uses free memory for caching, to make system faster. However, both Nagios and Paessler PRTG monitoring system show me that my memory usage is critical. I could change Nagios mem_usage script to sum free and cached memory, but would that be correct information? I doubt that they misunderstood Linux memory usage. Lets say I have 8 GB RAM. 5 GB are used, 2 GB is cached, and I have 1 GB of free memory. Real available memory should be free+cached (3 GB)? If some new application would need additional 3 GB RAM, could it take everything from cache and free without using swap, or is there a minimum that should be in cache? Real example: $ cat /proc/meminfo MemTotal: 5984256 kB MemFree: 137052 kB Buffers: 140484 kB Cached: 3439616 kB SwapCached: 244 kB Active: 3148824 kB Inactive: 2341768 kB ... My monitoring tools show that I have 137 MB free RAM, however I have ~3,5 GB in Cache. Thanks!

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  • Time Machine (archive) of pre-Leopard systems?

    - by benc
    I want to get off an older Mac OS X system permanently. It is an iBook G3, so that has two important characteristics: Power PC, not Intel based. Runs only Tiger, not Leopard. This means, as far as I can tell: Cannot run Time Machine directly. Here's the approach I have been contemplating: Mount the drive in Firewire mode. Back up the drive as a external drive to the Time Machine volume. Disconnect the drive (permanently). However, I'm concerned that this drive will eventually age out, when the Time Machine volume fills up, and the old-system-as-external-drive is gone. Would it be better to do a single backup with another utility, to shared disk?

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  • what am I doing wrong? Trying to reinstall Windows 7 starter onto my Acer Aspire One Netbook?

    - by Robbie Roberts
    I have been having some issues with my Netbook so I figured I would reformat it. I downloaded a copy of windows 7 starter, inserted it into my usb dvd drive and started my netbook. I made it as far as, "where do you want to install windows?" and it seems like the computer just freezes. it shows, Disk 0 Partition 1: PQSERVICE 13.0 GB OEM (Reserved) Disk 0 Partition 2: SYSTEM RESERVED 101.0 MB System Disk 0 Partition 3 218.8 GB Primary I cannot click on either of them, What am I doing wrong?

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  • How to know if my nginx is in good health?

    - by Howard
    I am running a nginx on EC2 (m1.small) for SSL termination. I am using 2 workers on Ubuntu, with latest nginx (stable), the network throughput is around 2Mbps and system load average is around 2 to 3. I am wondering if this system is in good health for now, e.g. what is the queue length (I know nginx can handle a lot of concurrent request, but I mean before the request is being served, how many of them need to wait before being served) what is the average queue time for a given request to be served. I want to know because if my nginx is cpu bounded (e.g. due to SSL), I will need to upgrade to a faster instance. My current nginx status Active connections: 4076 server accepts handled requests 90664283 90664283 104117012 Reading: 525 Writing: 81 Waiting: 3470

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  • Apache Tomcat 6.0.29 startup causing Win XP SP3 reboot

    - by Liam
    Some of our Windows XP Developer machines die (black screen - no ping) when starting up Tomcat from a console. This only happens if the Tomcat debug console window is displayed (not minimised). When minimised, the startup / run is successful. I've checked for Tomcat logs and the crash sessions produce empty (zero bytes) tomcat log files. No system logs exist and no crash dump is created even though this is enabled in the Windows settings. The machine is dual screen and another machine with the same image has the same issue. The only clue is just before the crash, one of the monitors the system reports "Cannot display video mode 1280x1024" (approximate error, didn't write it down). Is there a way I can get Windows to produce log files of this crash session? Beyond running Tomcat as a service / minimised window, how can I fix (or even investigate)?

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  • win7: app crashing/hanging on "save as"-dialog

    - by Fuxi
    hi all, now this is really annoying - i'm having a global problem in win7: when using the system's "save as"-filedialog, the main app will just hang. the mouse-cursor is showing progress, the whole app is hanging and i need to terminate it manually. it's happening with every app! (notepad, word, graphics app). i'm assuming it's something with the system enumerating the harddisk-drivenames or something. any idea how to fix this? btw - when viewing the problem details - it's telling the module - it's msonsext.dll looks like some office thing to me. thanks

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  • SCSI driver installation trouble

    - by Vicky
    I tried to install the driver of Adaptec 39320A-Ultra 320 SCSI card in Win2003 Server R2 SP2 in a DELL PowerEdge 2950 Server. I selected the driver from the list of drivers present in windows. But it says that the device could not be started(Code 10). I tried to put the card in a system that already had the driver installed. It worked fine. So there is no problem with the hardware. I even tried downloading the driver from the manufacturer website. When I try to select install from path and install that driver, it tell no matching driver found. When I install the default driver from windows, it shows the card in SCSI group of device manager, but with an ! symbol. Also the device ID in driver details was different from that of the one present in other system where it insalled fine. Any suggessions to solve it?

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  • My computer has gone horribly slow, how can I dignose whats wrong?

    - by Chirag N.R.
    I have a computer based on AMD processor & 512 MB RAM. Lately the computer has gone horribly slow. I did many tricks but was of no avail. So, I reinstalled my Operating system - Win XP SP3, still the the response is very slow. I checked if there are any background applications consuming resources. There was nothing suspicious. I removed all the applications on start, still the computer is slow. I've heard that AMD processor based systems show this behavior when they get aged. Is it true? Should I just buy a new system?

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  • How should I use my new SSD drive?

    - by jasondavis
    I just built a new PC the other day. Specs... Processor: Intel i7-930 quad core CPU CPU Cooler: COOLER MASTER Hyper 212 Motherboard: AsRock X58 Extreme 3 RAM/Memory: 6gb G-Skill tripple channel DDR3 memory (3 sticks of 2gb planning to get another kit to make it 12gb total soon) Operating System Hard drive: Intel X25-M 80GB Mainstream SATA2 Solid State Drive Video Cards: 2 XFX ATI Redeon HD 4650 cards to run 3-4 monitors Case: Lian Li PC-B10 Midtower case Power Supply: Antec TruePower New TP-750 Blue 750W Operating System Windows 7 Pro 64bit Not sure if the specs are helpful at all but I posted them just in case. So I got everything put together and running great so far but I need some advice/ideas/help/tips. I got the SSD drive in hopes of using it strictly for my windows 7 install along with all my other programs I install. I am then going to get another drive or 2 just for data (video,music,photos, etc). So my plan is to just install the new data drives and then in windows 7 I will change my "My documents" "My Music" "My Video" "MY Photos" library's to be located on the data drives instead of the OS SSD drive. I would ultimately like to install all my programs with my windows install on the SSD drive and then create an IMAGE of the drive and then 6 months down the road if things are sluggish I can just wipe the drive and restore my IMAGE with all my programs and settings in tact still. So here are some questions now. 1) How can I verify that TRIM is working on my new SSD? 2) Is there anything above that I missed that I should be doing? I think I once read that there is a page file or some sort of file that windows changes a lot and that it should be moved off f an SSD an onto my data drives. DOes anyone know what I might of heard? If you do can you explain the pros and cons of doing such a thing as well as how to possibly? 3) Any tips or advice to get the best performance from all this, I built a pretty nice system and I just want to make it stay that way as long as I can.

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  • Nginx + Passenger running a RoR app is returning 401 when 302 is expected

    - by DBruns
    I've got a RoR app running on Passenger on top of Nginx. I'm using devise for my authentication method and have a link that gets sent in an email to users that requires authentication to view. If a user clicks the link from Outlook, and IE is the default browser, IE makes an HTTP request using the following headers: GET http://www.company.com/custom_layouts/108 HTTP/1.1 Accept: */* Accept-Language: en-us User-Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; InfoPath.2; .NET4.0C; .NET4.0E) Accept-Encoding: gzip, deflate Connection: Keep-Alive Host: www.company.com Returning: HTTP/1.1 401 Unauthorized Content-Type: /; charset=utf-8 Transfer-Encoding: chunked Connection: keep-alive Status: 401 X-Powered-By: Phusion Passenger (mod_rails/mod_rack) 2.2.15 WWW-Authenticate: Basic realm="Application" Cache-Control: no-cache X-UA-Compatible: IE=Edge,chrome=1 Set-Cookie: _vxwer_session=[sessionstr]; path=/; HttpOnly X-Runtime: 0.011918 Server: nginx/0.7.67 + Phusion Passenger 2.2.15 (mod_rails/mod_rack) 31 You need to sign in or sign up before continuing. 0 When the exact same URL is typed into the address bar, it does this: GET http://www.company.com/custom_layouts/108 HTTP/1.1 Accept: image/jpeg, application/x-ms-application, image/gif, application/xaml+xml, image/pjpeg, application/x-ms-xbap, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */* Accept-Language: en-US User-Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; InfoPath.2; .NET4.0C; .NET4.0E) Accept-Encoding: gzip, deflate Connection: Keep-Alive Host: www.company.com Returning: HTTP/1.1 302 Found Content-Type: text/html; charset=utf-8 Transfer-Encoding: chunked Connection: keep-alive Status: 302 X-Powered-By: Phusion Passenger (mod_rails/mod_rack) 2.2.15 Location: http://www.company.com/users/sign_in Cache-Control: no-cache X-UA-Compatible: IE=Edge,chrome=1 Set-Cookie: _xswer_session=[session_info_here]; path=/; HttpOnly X-Runtime: 0.010798 Server: nginx/0.7.67 + Phusion Passenger 2.2.15 (mod_rails/mod_rack) 6f <html><body>You are being <a href="http://www.company.com/users/sign_in">redirected</a>.</body></html> 0 I expect them to return the same thing regardless.

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  • How to redirect third party logs to log server in Centos

    - by chandank
    I want to setup a simple log server to accept logs from all clients. I am not talking about standard system logs such as /var/log/mail , message, boot etc. I want to redirect or send application logs and they may not be using syslog daemon at all to log their message. Such as /appdir/log/error.log. I ran across many posts on the internet; most suggest using rsyslog or syslog-ng. Well so far I have been able to redirect the standard system logs not the application logs. I am using centos 5/6 environment.

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  • change browser to open weblinks in thunderbird

    - by Bevor
    Hello, because it's almost obvious that either Thunderbird or Firefox freeze my whole system after some time, I'd like to not use FF at the moment and let Thunderbird run only for a short time as long as I check e-mails. Thunderbird web links should be opened with opera from now. For that I went in Thunderbird to Preferences-Advanced-General-Config Editor and set the following: network.protocol-handler.app.http -> /usr/bin/opera network.protocol-handler.app.https -> /usr/bin/opera network.protocol-handler.warn-external.ftp -> true network.protocol-handler.warn-external.http -> true network.protocol-handler.warn-external.https -> true Moreover I changed in Gnome in System-Preferences-Prefered Applications Opera as webbrowser and I checked in FF that it should warn if FF is not the default browser (obviously it isn't anymore). Unfortunately all of these settings doesn't work. Thunderbird still opens web links with FF. Any explantions why? (I already restarted Thunderbird although I don't have to, but no effect)

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  • Cannot boot from Yumi multiboot USB stick

    - by Amator
    I've just created a multiboot USB stick using Yumi. I tried to start my notebook (Asus K70IO) using it, but all I see is just a black screen with blinking underscore even after waiting for minutes. If during this time I remove the USB stick I get the message: "Operating system load error". How do I properly load my Yumi USB stick and use it? I've tried formatting it using Yumi's checkbox to format the stick in FAT32 too, but it didn't help. Now I tried to use Sardu 2.0.5 and met same problem: black screen and blinkin underscore, if I remove stick I see "Operating system load error" and my OS starts to boot. At the same time if I create bootable USB stick from ISO using UltraISO it boots smoothly.

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  • How Will Mac OS X Snow Leopard Upgrade Work?

    - by Blaenk
    I am relatively new to Mac OS X. I got my MacBook in January, and I have never experienced a new version of the operating system. I am wondering if I should simply upgrade my install to Snow Leopard. I come from Windows where it is advised to do a complete reformat. I would rather not do this, however, and I have a feeling that due to Mac OS X' POSIX based nature, it might actually not be all that bad if I upgrade. I guess if things end up screwing up I can simply go ahead and reformat, but I am wondering what it is like to upgrade systems running Mac OS X. I wouldn't want my Snow Leopard installation to be somehow deficient due to certain inconsistencies within the system.

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  • VirtualBox no network access

    - by Frantumn
    I'm on a work machine, setting up a virtual ubuntu image using virtual box. After I installed the image, I can't seem to connect to the internet. If I look at network and sharing center on my host OS (W7) I see that the VirtualBox Host-Only Network reads as "no network access" How can I set it up so that it uses the same network as the host OS. UPDATE! Okay, is there a way I can tell virtual box host-only network to use a proxy script?

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  • no download and install progress, no error message (no text at all!) for sudo gem install merb

    - by Delirium tremens
    I'm using ruby 4.2, rubygems 1.3.5-1ubuntu2 and Ubuntu Lucid Lynx. I installed ruby and rubygems with Synaptic. Since "The gem command will output its progress while it sucks down and installs all the necessary gems for a full Merb install. " is written at http://wiki.merbivore.com/howto/installation/gems, when I type sudo gem update --system, I get: "ERROR: While executing gem ... (RuntimeError) gem update --system is disabled on Debian. RubyGems can be updated using the official Debian repositories by aptitude or apt-get." and rubygems has list, build and help commands, I'm wondering if in Ubuntu rubygems is used only for something other than downloading. If it isn't, why isn't rubygems showing any text for sudo gem install merb?

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  • Couldn't start mysql service in linux

    - by Haseena
    Iam trying to install one version of mysql in a LINUX machine. The system contain already another version of mysql installation. I prefer manual installation. Copy the exctracted tarball into a location and create symbolic link to that. I wish to install my mysql version without affecting already installed mysql version in the system. I created mysqld as service. But It couldn't start. When Iam trying to start this mysqld process, it shows an error like: Starting MySQL............................................................ ......................................... ERROR! The server quit without updating PID file (/var/lib/mysql/Test.pid). Please help me, is any wrong with my installation??? I follow the below mentioned link for installion : http://code.openark.org/blog/mysql/manually-installing-multiple-mysql-instances-on-linux-howto Thanks in Advance

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  • SSH authentification with public key fails

    - by palani
    I have my id_rsa.pub key under my /home/user/.ssh. I carefully copied that key and paste my key to respository Git account. While trying to connect from my local system to my git respository, I got the following error: warning: Authentication failed. Disconnected; no more authentication methods available (No further authentication methods available.) I removed SSH in system and re-enable and did again, but no luck. I have no idea what's happening with my SSH key. Can any one please tell me on this? Note : I noticed in my home /home/user/.ssh && /home/user/.ssh2

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  • My computer keeps restart when accept Skype call

    - by hvtuananh
    I'm using latest Skype version (4.2) on Windows XP SP3 My computer keeps restart when I click "Accept" button on Skype call Windows Update is running and I've already installed all updates What's wrong with my computer? How to fix it? EDIT: I only see this error in Event Viewer Event Type: Error Event Source: System Error Event Category: (102) Event ID: 1003 Date: 3/2/2010 Time: 3:47:50 PM User: N/A Computer: TUANANH Description: Error code 1000000a, parameter1 ffffff94, parameter2 0000001c, parameter3 00000000, parameter4 80537bf1. 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 30 1000000 0020: 61 20 20 50 61 72 61 6d a Param 0028: 65 74 65 72 73 20 66 66 eters ff 0030: 66 66 66 66 39 34 2c 20 ffff94, 0038: 30 30 30 30 30 30 31 63 0000001c 0040: 2c 20 30 30 30 30 30 30 , 000000 0048: 30 30 2c 20 38 30 35 33 00, 8053 0050: 37 62 66 31 7bf1

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  • Text template or tool for documentation of computer configurations

    - by mjustin
    I regularly write and update technical documentation which will be used to set up a new virtual machine, or to have a lookup for system dependencies in networks with around 20-50 (server-side) computers. At the moment I use OpenOffice Writer with text tables, and create one document per intranet domain. To improve this documentation, I would like to collect some examples to identify areas where my documents can be improved, regarding general structure and content, to make it easy to read and use not only for me but also for technical staff, helpdesk etc. Are there simple text templates (for example for OpenOffice Writer) or tools (maybe database-driven) for structured documentation of a computer configuration? Such a template / tool should provide required and optional configuration sections, like 'operating system', 'installed services', 'mapped network drives', 'scheduled tasks', 'remote servers', 'logon user account', 'firewall settings', 'hard disk size' ... It is not so much low-level hardware docs but more infrastructure / integration information in these documents (no BIOS settings, MAC addresses).

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  • How to print all users from windows-group to a textfile?

    - by Tim
    Hello, i'm trying to print all users of a group "Students" to a Textfile "Students.txt". I'm not in a domain, so this does not work: net group "Students" >> students.txt because i get following: This command can be used only on a Windows Domain Controller. Thank you in advance If anybody is interested in a VB.Net solution, i've programmed a Winform solution with a multiline Textbox to copy/paste the members (anyway, thanks for your help): Imports System.DirectoryServices 'first add a refernce to it from .Net Tab' .... Private Sub PrintGroupMember_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load Dim students As List(Of DirectoryEntry) = MembersOfGroup("Students") For Each user As DirectoryEntry In students Me.TextBox1.Text &= user.Name & vbCrLf Next End Sub Public Function MembersOfGroup(ByVal GroupName As String) As List(Of DirectoryEntry) Dim members As New List(Of DirectoryEntry) Try Using search As New DirectoryEntry("WinNT://./" & GroupName & ",group") For Each member As Object In DirectCast(search.Invoke("Members"), IEnumerable) Dim memberEntry As New DirectoryEntry(member) members.Add(memberEntry) Next End Using Catch ex As Exception MessageBox.Show(ex.ToString) End Try Return members End Function

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