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• Recommendation for Ethernet switches that allow arbitrary network topologies

  - by sblair

  We have the following requirements for three Ethernet switches that will be connected together: Allow the switches to connect together to form dynamic, arbitrary topologies, i.e., support for the RSTP is essential. Allow the physical topology (which ports are connected together) to be gleaned from the switches, e.g., using SNMP traps. This is optional, but would be very useful. At least 5 ports on each switch, but only 3 will be used for connecting the switches together. Be as compact as possible. Ideally be in stock, in the UK. Only 100Mb/s is required. (This question is the result of the lack of RSTP support from 3Com NJ225 devices, as described in my previous question.)

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• Motherboard wiring

  - by ML

  I am putting a new motherboard in a chenbro chasis and I dont get how to plugin the wires for powerSW resetSW, etc. It is a SuperMicro P4DP6 motherboard. ** I cant post an image yet, but here is a long to the spot on the mobo where this goes: http://andrewslack.info/mobo.png The powerSW lead is a green and white wire. I have the wire for PowerSW in place as the white wire ground and I have tried the reverse even (green to ground). The wire is covering Pin 1 and 2 in the diagram And I press the power button on the machine and nothing happens. It worked before I replaced the motherboard, the 24-pin ATX power leas is connected as well as the 2dn 6-pin optional power. Thoughts?

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• Motherboard wiring

  - by ML

  I am putting a new motherboard in a chenbro chasis and I dont get how to plugin the wires for powerSW resetSW, etc. It is a SuperMicro P4DP6 motherboard. ** I cant post an image yet, but here is a long to the spot on the mobo where this goes: http://andrewslack.info/mobo.png The powerSW lead is a green and white wire. I have the wire for PowerSW in place as the white wire ground and I have tried the reverse even (green to ground). The wire is covering Pin 1 and 2 in the diagram And I press the power button on the machine and nothing happens. It worked before I replaced the motherboard, the 24-pin ATX power leas is connected as well as the 2dn 6-pin optional power. Thoughts?

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• Wiki & issue-tracking in one system?

  - by torbengb

  I'm looking for an integrated solution that combines documentation of a software system with tracking of bugs, change requests and feature requests. Requirements: Documentation using a wiki would be nice, preferably one supporting CamelCase or other automatic linking. Issue tracking must allow a customizable workflow and optional e-mail notifications. Known alternatives: FogBugz is an awesome issue tracker, but the wiki appears to be somewhat awkward. Trac's wiki is average (though not as nice as Foswiki.org) but I don't know how good the integrated issue tracker is. What would you recommend? What systems offer the best combination of documentation and issue tracking?

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• I reinstalled OS X and the system was the same as before

  - by slhck

  Strange thing happened. I want so sell my old Macbook and therefore used a disk image of the Snow Leopard DVD that I restored onto an external drive. I booted off the drive and went through the installation steps. Now I really would like to perform "archive and install", as there might be some files that I need later, but I didn't see the option. The only options for installation I had, were, including others, optional printer drivers and Rosetta. So I just clicked through and I wasn't given any other option. After about 45 minutes, my system booted again, and voila, there was my old system. Nothing changed. How should I proceed to actually reset the system? All I have is that Snow Leopard DVD image.

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• Where can I find a useful Unicode fallback font for Mac OS X?

  - by Stephen Jennings

  On every browser I've tried (Firefox, Safari, Chrome, and Omniweb), when I go to a web page containing somewhat less-common characters, I can't see the glyphs. For example, on the Wikipedia page for the Bengali Language, the very first line contains a string of squares; on Windows, I can see the Bengali writing. On Windows, as long as I have the Arial Unicode MS font installed, these characters fall back to that font and display properly. Mac OS X doesn't seem to ship with a font containing these Unicode characters (it has Arial Unicode MS, but it must be a subset of the Windows version because Bengali doesn't display in that font). I checked on my Snow Leopard DVD and I installed "Additional Fonts" from the Optional Installs package, but I'm still missing many languages. Is there any good, free font that contains a large collection of languages? I know creating fonts is difficult and time-consuming, but it seems like including at least one font like this with operating systems should be standard by now.

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• Deleting multiple objects in a AWS S3 bucket with s3curl.pl?

  - by user183394

  I have been trying to use the AWS "official" command line tool s3curl.pl to test out the recently announced multi-object delete. Here is what I have done: First, I tested out the s3curl.pl with a set of credentials without a hitch: $ s3curl.pl --id=s3 -- http://testbucket-0.s3.amazonaws.com/|xmllint --format - % Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed 100 884 0 884 0 0 4399 0 --:--:-- --:--:-- --:--:-- 5703 <?xml version="1.0" encoding="UTF-8"?> <ListBucketResult xmlns="http://s3.amazonaws.com/doc/2006-03-01/"> <Name>testbucket-0</Name> <Prefix/> <Marker/> <MaxKeys>1000</MaxKeys> <IsTruncated>false</IsTruncated> <Contents> <Key>file_1</Key> <LastModified>2012-03-22T17:08:17.000Z</LastModified> <ETag>"ee0e521a76524034aaa5b331842a8b4e"</ETag> <Size>400000</Size> <Owner> <ID>e6d81ea69572270e58d3814ab674df8c8f1fd5d502669633a4951bdd5185f7f4</ID> <DisplayName>zackp</DisplayName> </Owner> <StorageClass>STANDARD</StorageClass> </Contents> <Contents> <Key>file_2</Key> <LastModified>2012-03-22T17:08:19.000Z</LastModified> <ETag>"6b32cbf8219a59690a9f69ba6ff3f590"</ETag> <Size>600000</Size> <Owner> <ID>e6d81ea69572270e58d3814ab674df8c8f1fd5d502669633a4951bdd5185f7f4</ID> <DisplayName>zackp</DisplayName> </Owner> <StorageClass>STANDARD</StorageClass> </Contents> </ListBucketResult> Then, I following the s3curl.pl's usage instructions: s3curl.pl --help Usage /usr/local/bin/s3curl.pl --id friendly-name (or AWSAccessKeyId) [options] -- [curl-options] [URL] options: --key SecretAccessKey id/key are AWSAcessKeyId and Secret (unsafe) --contentType text/plain set content-type header --acl public-read use a 'canned' ACL (x-amz-acl header) --contentMd5 content_md5 add x-amz-content-md5 header --put <filename> PUT request (from the provided local file) --post [<filename>] POST request (optional local file) --copySrc bucket/key Copy from this source key --createBucket [<region>] create-bucket with optional location constraint --head HEAD request --debug enable debug logging common curl options: -H 'x-amz-acl: public-read' another way of using canned ACLs -v verbose logging Then, I tried the following, and always got back error. I would appreciated it very much if someone could point out where I made a mistake? $ s3curl.pl --id=s3 --post multi_delete.xml -- http://testbucket-0.s3.amazonaws.com/?delete <?xml version="1.0" encoding="UTF-8"?> <Error><Code>SignatureDoesNotMatch</Code><Message>The request signature we calculated does not match the signature you provided. Check your key and signing method.</Message><StringToSignBytes>50 4f 53 54 0a 0a 0a 54 68 75 2c 20 30 35 20 41 70 72 20 32 30 31 32 20 30 30 3a 35 30 3a 30 38 20 2b 30 30 30 30 0a 2f 7a 65 74 74 61 72 2d 74 2f 3f 64 65 6c 65 74 65</StringToSignBytes><RequestId>707FBE0EB4A571A8</RequestId><HostId>mP3ZwlPTcRqARQZd6gU4UvBrxGBNIVa0VVe5p0rqGmq5hM65RprwcG/qcXe+pmDT</HostId><SignatureProvided>edkNGuugiSFe0ku4eGzkh8kYgHw=</SignatureProvided><StringToSign>POST Thu, 05 Apr 2012 00:50:08 +0000 The file multi_delete.xml contains the following: cat multi_delete.xml <?xml version="1.0" encoding="UTF-8"?> <Delete> <Quiet>true</Quiet> <Object> <Key>file_1</Key> <VersionId> </VersionId>> </Object> <Object> <Key>file_2</Key> <VersionId> </VersionId> </Object> </Delete> Thanks for any help! --Zack

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• Vim: Show the index of tabs in the tabline

  - by bitmask

  Lets say I opened file1.txt, file2.txt, file3a.txt and file3b.txt such that the tabline (the thing on the top) looks like this: file1.txt file2.txt 2 file3a.txt (Note how file3b.txt. is missing because it is shown in a split, in the same tab as file3a.txt) To move more quickly between tabs (with <Number>gt), I would like each tab to display its index, along the filename. Like so: 1:<file1.txt> 2:<file2.txt> 3:<2 file3a.txt> The formatting (the angle braces in particular) are optional; I just want the index to appear there (the 1:, 2: and so on). No clues on :h tab-page-commands or google whatsoever.

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• Should I install Windows Management Framework 3.0?

  - by Massimo

  I'm posting this as a BIG CAVEAT to everyone. I know it's not a standard Q&A, but I think this is someone every Windows admin should know. There is a very real risk of falling into Big Troubles. Microsoft has recently released Windows Management Framework 3.0 for Windows Server 2008 and Windows Server 2008 R2 systems, which includes some nice things native to Windows Server 2012 (like PowerShell 3.0) and lots of improvements to WMI, WinRM and other management technologies. Windows Update is advertising it as an optional update. Should I install it on my servers?

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• Create mix CDs from MP3 files

  - by Dave Jarvis

  How would you write a script (preferably for the Windows commandline) that: Examines thousands of MP3 files stored on a single drive (e.g., G:\) Randomizes the collection Populates a series of directories up to 650MB worth of songs (without exceeding 650MB) Every song is shucked exactly once (Optional) The directory size comes as close as possible to 650MB The DIR, COPY, and XCOPY commands have no explicit file size switches. A few Google searches have come up with: File size condition in DOS Cygwin and UWIN DOS File sizes It would be ideal if UNIX-like environments can be avoided. My question, then: How do you compare file (or directory) sizes using the Windows commandline?

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• Folder permissions when using /etc/skel and pam

  - by rothgar

  I have a Red Hat 5.8 server that is bound to active directory and users are authenticated via active directory when they log in via sftp. User home folders are created during login using /etc/pam.d/system-auth. The specific line that creates the home folder is session optional pam_mkhomedir.so skel=/etc/skel/ umask=0066 This correctly gives home folders 711 permissions so no one else can read their directories. The problem is, the pam_mkhomedir.so also modifies permissions on all folders/files inside the /etc/skel folder which I don't want. There is a public_html folder (for apache) which needs to have 755 permissions so users can create web pages. Is there a way for me to either a) stop pam_mkhomedir.so from recursively changing all the file permissions or b) create a script that creates the public_html folder after skel is copied and to set the correct permissions?

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• Could not establish a secure connection to server with safari

  - by pharno

  Safari tells me that it couldnt open the page, because it couldnt establish a secure connection to the server. However, other browsers (opera, firefox) can open the page. Also, theres nothing in the apache error log. The certificate is selfsigned, and uses standart values. (seen here: http://www.knaupes.net/tutorial-ssl-zertifikat-selbst-erstellen-und-signieren/ ) ssl config: SSLEngine on #SSLInsecureRenegotiation on SSLCertificateFile /home/gemeinde/certs/selfsigned/gemeinde.crt SSLCertificateKeyFile /home/gemeinde/certs/selfsigned/gemeinde.key #SSLCACertificateFile /home/gemeinde/certs/Platinum_G2.pem #SSLOptions +StdEnvVars <Location "/"> SSLOptions +StdEnvVars +OptRenegotiate SSLVerifyClient optional SSLVerifyDepth 10 </Location>

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• Ignoring GET parameters in Varnish VCL

  - by JamesHarrison

  Okay: I've got a site set up which has some APIs we expose to developers, which are in the format /api/item.xml?type_ids=34,35,37&region_ids=1000002,1000003&key=SOMERANDOMALPHANUM In this URI, type_ids is always set, region_ids and key are optional. The important thing to note is that the key variable does not affect the content of the response. It is used for internal tracking of requests so we can identify people who make slow or otherwise unwanted requests. In Varnish, we have a VCL like this: if (req.http.host ~ "the-site-in-question.com") { if (req.url ~ "^/api/.+\.xml") { unset req.http.cookie; } } We just strip cookies out and let the backend do the rest as far as times are concerned (this is a hackaround since Rails/authlogic sends session cookies with API responses). At present though, any distinct developers are basically hitting different caches since &key=SOMEALPHANUM is considered as part of the Varnish hash for storage. This is obviously not a great solution and I'm trying to work out how to tell Varnish to ignore that part of the URI.

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• Replacing an ATA-100 hard drive

  - by Pieter

  I was instructed to replace the hard drive in an old laptop, a Dell Latitude D505. I'm suspecting that there was a head crash when someone moved the laptop while it was turned on. In the specifications, I found this about the hard drive: 30GB ATA-100; (4200RPM); 40GB ATA-100 (5400RPM); 60GB ATA-100 (4200RPM) *Optional 40GB (5400) 2nd HDD Module for media bay I'm familiar with SATA and IDE, but ATA-100 doesn't ring a bell. What do I have to take into account when I go look for a replacement hard drive?

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• Roundcube can't connect to PostgreSQL database

  - by kenny.r

  I'm trying to install Roundcube on a CentOS 5.5 server, with a PostgreSQL 8.1.22 database. The first page of the installer script, that checks for the presence of php libraries and such, gives me green OKs across the board. I even went out of my way to install the optional ones. Page two generates me two configuration files (main.inc.php and db.inc.php) which I put into place. Page three is where things go wrong: Check DB config DSN (write): NOT OK(MDB2 Error: connect failed) Make sure that the configured database exists and that the user has write privileges DSN: pgsql://roundcube:password@localhost/roundcubemail The info you see there (user roundcube, password password, server localhost and database roundcubemail) is all correct. The database roundcubemail belongs to the user roundcube and it has write permissions. I have no clue why it can't connect to that database. I'm managing it with phpPgAdmin, which is running on the very same Apache, on the same server!

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• How to interpret the bash command "usage" syntax?

  - by raoulsson

  How exactly do you have to interpret the output of a commands "usage" output, in bash for example. For example, on my OS X, cp gives me usage: cp [-R [-H | -L | -P]] [-fi | -n] [-apvX] source_file target_file cp [-R [-H | -L | -P]] [-fi | -n] [-apvX] source_file ... target_directory What does the nested options, like -H within -R, indicate? Does upper and lower case have any meaning? When is an argument optional, required? I need to implement a telnet command line against a program of mine and I would like to get this straight.

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• Looking for Linux text editor

  - by Daniel

  I'm looking for VIM replacement. My key points are: Extensible in sane language (such as Python, Ruby, or even Lua, after vimscript everything will do). Also GUI part should be extensible too, so no SublimeText2. GUI. Preferrably GTK+. Lightweight. I don't understand IDEs like Eclipse/NetBeans consuming up to 1G of RAM. File browser panel. Splits, tabs and windows. There should be ability to split views tabs infinite number of times (or while they fit to screen). VCS support (optional: especially Git) Snippets & autocompletion (not mandatory, but I would very love to have those) Any ideas?

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• How to install network drivers during installation?

  - by Matt

  I have a server that I'm attempting to install windows onto. However, the disk is an iscsi target provided by ipxe. Everything appears to go well until about 3/4 through the install process I get an error about a critical driver missing and the installation is cancelled. I would say the critical driver would be the network card. It's an intel nic and the drivers are not on the windows installation CD. I tried slipstreaming them with RTSevenLite, but after it created the CD it seems it failed to make it bootable. I've also not been successful in making a bootable USB thumb drive or USB HDD. I suspect a buggy bios even though I have the latest. How to install network drivers during installation? Windows used to provide an optional F6 during install feature but this seems to be missing in Windows Servert 2008. Perhaps there is a way to do this, or another method?

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• Unexpected behavior in Bash

  - by cYrus

  From man bash: A simple command is a sequence of optional variable assignments followed by blank-separated words and redirections, and terminated by a control operator. The first word specifies the command to be executed, and is passed as argument zero. The remaining words are passed as arguments to the invoked command. So it's perfectly legal to write: foo=bar echo $foo but it doesn't work as I expect (it prints just a newline). It's quite strange to me since: $ foo=bar printenv foo=bar TERM=rxvt-unicode [...] Could someone please explain me where I'm doing wrong?

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• Thomson TG585v7 router - promiscuous mode

  - by Nikita

  I have a TG585v7 as a router with several machines plugged into it. In the default setup, the packets are only delivered to the specific machine but I want to be able to setup to monitor all network traffic on one of the machines, i.e. I need those packets to be picked up when my ethernet card is in promiscuous mode. Is this possible? Guide here has this "mcastpromisc Make the IP interface multicast promiscuous. OPTIONAL", is this what I am looking for? Does it mean I need to manually add all my machines by their MAC addresses to be able to receive packets destined for them? Or am I out of luck and I need to get a better router?

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• Xen on bare metal, Mac OS X 10.6, Vista, Debian as guest OSes

  - by Mischa Arefiev

  I have: a desktop PC (Athlon 64, 2 cores) ...that came with Windows Vista, and a retail DVD of Mac OS X 10.6 I want: to install Mac OS X through Hackintosh (I believe my hardware is suitable), to also run Windows Vista with full 3D support for video games and Youtube, to also run Debian GNU/Linux with optional 3D for work. I don't think my CPU supports VT-x, but it should have AMD-V. So the question is: Can all of this be done with Xen (Xen on bare metal, all three OSes as guests)? Or should I just try to install OS X first and then run Vista and Debian in Parallels?

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• Will I need a dedicated static IP or a unique IP is enough to SSL enable my website?

  - by Devner

  Hi, This is the first time I am dealing with SSL and Dedicated Static IP /Unique IP. Now this webhost says that they will provide Unique IP (not shared with other customers) but do NOT guarantee that it will be static. Now I plan to make my website SSL enabled and install a SSL certificate. So in order to SSL enable my website, will I really need a Dedicated Static IP or will this Unique IP (without the guarantee that it will be static) be enough? What problems will I need to face if the IP is not static? I have already bought hosting from them. And they showed me that option while adding optional services to the account (after I placed my order), so I did not even have a clue about this. Thank you all in advance.

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• SharePoint - force user to accept AUP when first logging in etc

  - by Chris W

  We're looking to move a bespoke intranet across to SharePoint. One query that has come up is whether we can do the following easily: When user logs in for the first time they should be forced read and accept an Acceptable Use Policy for the site. Agree a separate agreement that relates to their data being shared with other parties. (Optional) upload their profile photo. They can skip this step if they don't have one but they should be prompted to do it each time they login subsequently. The above is all nice and easy in a bespoke app but I can't see how to do this with SharePoint. Can we build a custom workflow that is tied to the user logging in? So far I can only find how to attach workflows to libraries and lists.

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• Trying to script rsync using pam_exec

  - by Ricky-Rose

  I'm trying to write a bash script that will execute rsync when called by pam_exec. I've tried a couple different ways, and I'm not sure what I'm doing wrong. When I try to run the script at login by adding session optional pam_exec.so /usr/bin/local/sync.sh to my sshd file, it gives me an exit code of 12. if I log in and then manually run my script, it allows me to connect to the remote server, and it lists my files, but it doesn't actually sync anything. I have tried the code below using buth $USER and $PAM_USER. $PAM_USER doesn't work at all. #!/bin/sh rsync -azv -e ssh $USER@remote_server:/home/html/$USER/ /home/html/$USER

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• Windows Updates settings issue!

  - by Kumi

  Hi, it's my first post here, don't wanna make it long, but I got a problem with my 'Windows Update' it won't show its setting's options. It only shows these settings: Important Updates, Recommended Updates and Who can install updates, it removed the other setting sections like 'Microsoft Updates' "Give me updates for Microsoft products and check for new optional Microsoft software when I update windows" or the last settings section 'Software notification' "Show me detailed notifications when new Microsoft software is available" Here's a screenshot of my Windows Update: http://img96.imageshack.us/img96/1963/windowsupdatescreenshot.png And here's how it was before and how should be: h**p://www.sevenforums.com/attachments/tutorials/3523d1242168648-windows-update-settings-change-wu_settings.jpg Thanks. PS: I'm running windows 7 RTM

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