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• Copy/move EBS volume from one Region to another

  - by Gnanam

  Background of our setup: We've hosted our web-based application in Amazon EC2 US East (Virginia) Region. Our instance is based on Linux distribution (CentOS) and AMI is S3-backed. 1 EBS volume (400 GB size) is attached to this instance. Question: We've planned to migrate our deployment to US West (N. California) Region. From AWS doc, I understood that for moving AMI, there is a command-line tool available - ec2-migrate-bundle. But for moving EBS volume across Region, currently there is no tool available. I'm looking for easiest and/or fastest way of copying/moving EBS volume from one Region to another. Also, are there any hidden risks involved during and/or after the migration? Experts ideas/suggestions/recommendations on this are highly appreciated.

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• how to prevent log output from PostgreSQL stored procedure ?

  - by ssc

  I am running a number of PostgreSQL scripts that used to produce excessive log output. I managed to reduce most of the output to an acceptable amount by passing --quiet as parameter to the psql command line client and adding SET client_min_messages='warning'; to the beginning of my SQL scripts. This works fine for most basic statements like SELECT, INSERT, UPDATE, etc.) However, when I call a stored function in a script using e.g. SELECT my_func(my_args);, there is still log output similar to my_func (omitted a long with many '-' here because SF thinks that's a headline) (1 row) The output is useless; it only makes me having to scroll back up a long way after the script has run and also makes it much harder than necessary to spot any relevant error output. How can I get rid of it ?

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• tmux: unbind C-[ as a prefix

  - by StanAngeloff

  I have a fairly straight forward .tmux.conf file which does nothing more but to define a couple of options, such as history-limit. I have not added any custom key bindings yet. I find it extremely annoying that I cannot unbind C-[ as a prefix in tmux. Here is what I mean: $ uname -a Linux stan-inspiron 3.2.0-24-generic #39-Ubuntu SMP Mon May 21 16:52:17 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux $ tmux [0] 0:~* "stan-inspiron" 10:05 12-Jun-12 % vim Whilst inside vim, when I go to insert mode and then use C-[0 to escape insert mode and move to the first character on the line, tmux grabs the key first and complains: Window not found: :0 ** I tried all sorts of things in my .tmux.conf, but nothing works. I thought it might be a terminal or shell issue, but confirmed same behaviour on a configless machine using Bash and [Gnome] Terminal. So the question really is, how do I unbind the C-[ key from tmux? ** I have base-index 1 set.

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• Can a switch consume bandwidth?

  - by aashiq

  I have a network with a router and a switch. At first my ISP's optical fiber is connected with media converter input port. Than Ethernet cable (output port of Media converter) is connected with the switch. Then an output Ethernet cable is connected with our inner Microtik router. Then this router is connected with another LAN switch. From this switch we have got every connection other switch. It is our total network structure. Our bandwidth is 2 Mbps. From the 11th of March our MRTG graph shows high all the time even when my all switch is switched off except LAN switch. That's why our line is breaking up (Voice call). How could be it possible? My all PC's bandwidth is limited but when connected PC with media converter directly then the graph shows normal. That's why I can't blame my ISP.

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• Is there a program that compares image files and reports if they are exactly the same pixel-wise?

  - by Nathaniel Drake

  I'm making a regression testing suite for some rendering software. I need to be able to load an image file (PNG or TGA, ideally) and compare the pixel values to a standard approved image. I'd like it to be command line driven too, so I can make a batch file to run all the tests. All the compare utilities I have found so far either show differences (I just need it to fail if they are different) or compare all the bytes, meaning that meta-data will trigger a fail. Anyone got any suggestions? I am not a coder, and can only barely cobble a batch script together. Thanks for any suggestions.

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• PHP compiled on Mac OSX 10.6 - using /usr/lib when trying to start apache... rather than /opt/local/lib specified when php was configured

  - by Anthony

  PHP 5.3.3 compiled on Mac OSX 10.6 - using /usr/lib when trying to start apache... rather than /opt/local/lib specified when php was configured Why is it trying to load from /usr/lib when I specified in my configure not to? httpd: Syntax error on line 115 of /private/etc/apache2/httpd.conf: Cannot load /usr/libexec/apache2/libphp5.so into server: dlopen(/usr/libexec/apache2/libphp5.so, 10): Library not loaded: /opt/local/lib/libiconv.2.dylib\n Referenced from: /usr/libexec/apache2/libphp5.so\n Reason: Incompatible library version: libphp5.so requires version 8.0.0 or later, but libiconv.2.dylib provides version 7.0.0 The error message above refers to /opt/local/lib which when I run: otool -LD /opt/local/lib/libiconv.2.dylib /opt/local/lib/libiconv.2.dylib: /opt/local/lib/libiconv.2.dylib (compatibility version 8.0.0, current version 8.0.0) /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 125.0.0) It shows that the version is different than what http is erring out as.

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• How do i enable deflate on apache2? debian

  - by acidzombie24

  I looked at the other answers and those solutions did not help. I am completely confused how to do this. I know almost nothing about apache nor how to use it and nearly all the article say write this but doesnt tell me where. So far i have done this # a2enmod deflate Module deflate already enabled Then i tried writing this in httpd.conf AddOutputFilterByType DEFLATE text/html text/plain text/xml text/css Then i wrote a longer version which involved deflate.c. After those didnt work i deleted them all and wrote the AddOutputFilterByType line in apache2/sites-enabled/000-default inside of I used this to test http://www.whatsmyip.org/http_compression/ everytime it says no compression. I used another site but i could never compress. Also i restart the server everytime i save a file so what could be the problem and how do i enable this properly?

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• Why are unicode characters not rendering correctly

  - by sw1nn

  Background: I have some unicode characters in my prompt (git status markers essentially) I'm running urxvt under xfce on arch linux. I'm using DejaVu Sans Mono for Powerline font, specified via .Xresources line: URxvt*font: xft:DejaVu Sans Mono for Powerline:pixelsize=14 When I start urxvt the unicode characters do not render correctly. For example ? renders as â However, if I then start a new urxvt from inside the first terminal everything renders correctly. There doesn't appear to be any difference in the environment between the two terminals. What could be the difference between the first invocation and the nested invocation? I suspect the font is not correct in the 'outer' instance, but I'm unsure how to check the font of a running X window screenshot demonstrates the problem: Note: I moved this question from serverfault.com - i hope this site is more appropriate

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• How to tell which physical disks have bootable MBR?

  - by Jon

  The computer I am using right now has 6 physical disks attached. Using the BIOS's "select boot device" functionality I have discovered that I can boot off 3 of these disks into the exact same bootloader. This means that all of these disks have the bootable flag set on their MBR, even though I had been under the impression that only 2 of them are in fact bootable. My question is: is there an easy way to check which disks have a bootable MBR with a command line tool or some OS utility? I am aware of the DISKPART tool and its basic functionality, but I haven't found how to view the information I need. The OS is Windows 7 x64 Ultimate with SP1.

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• Can I do a "one-time" file content search in Windows Server 2008 without adding the folder to the index?

  - by G-.

  Can I search for files which contain a specific string in a folder if that folder is not in the search index? So, lets say folder 'textFiles' is not in the index. I navigate to this folder in windows explorer. I type '.ini' in the search box I want to see a result list containing only 'b.txt' FOLDER C:\textFiles\ FILE a.php CONTENT once twice thrice mice moose monkey FILE b.txt CONTENT mingle muddle middle.ini banana beer FILE c.spo CONTENT sellotape stapler phone book I do not have permission to add folders to the windows index and I do not have permission to install or run any executables that did not ship with the server or approved applications. I'd be happy with a windows native command line solution if necessary? Thanks G

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• File corruption when copying different file on raid 1

  - by Stephan

  I have a RAID 1 configuration of 2 1TB drives on a Fedora 12 box. Most of what is stored there are video files that are numerical labeled. The problem I'm having is that I had one of the video files get corrupted. I copied a replacement from a backup and replaced the bad file and now it works fine. However, after doing this the next numbered file goes from 350MB to 200KB and all but about .5 second of video disappears. If I then replace that file it happens to the next one down the line. Ex: Replace corrupt file 1.avi and file 2.avi shrinks to 200KB. Replace now corrupted 2.avi and it works but 3.avi gets screwed up. I have run SMART tests on the drives and they report fine. Does anyone have any tests I can run to try to figure out what is going on? EDIT: It is a two disk software RAID 1 with an ext4 filesystem

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• One-Way Backup Service? [closed]

  - by Jon Rodriguez

  Up until a month ago, my girlfriend has used MobileMe to backup all the files on her MacBook. This turned out terribly when a quirk of MobileMe caused it to erase all of her files on MobileMe, and then sync the newly-erased MobileMe down to her computer, erasing everything. A week's worth of college essays and CS homework were gone. Now, I am terrified of any commercial cloud-backup solutions because of the possibility of this happening. Going off the list provided in these answers, could you please help me find a good backup service that is completely one-way? I want a service where there is literally not a single line of code that has the possibility of writing to my computer's drive. I want a pure one-way backup service.

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• chdir warning when opening .tar file on OS X

  - by denonth

  I need to unarchive a file to the /Developer folder. Install Qt for iOS SDK The Qt for iOS SDK has been configured to be installed in the default Xcode installation location /Developer. It is not possible to install the SDK into another location without first rebuilding it, as the install location is contained within the qmake executable, and that is built as part of Qt. To install the Qt for iOS SDK, open ‘Terminal’ and type the following from the command­-line: tar –xf qt­-everywhere-­ios­-4.8.0­-xxx.tar.gz –C /Developer (where xxx is an identifier which can be used to determine the build of the iOS SDK eg. arm7-­-nossl) This will install the Qt for iOS SDK into the following path: /Developer/Platforms/iPhoneOS.platform/Developer/usr/share/qt­-everywhere­-ios­-4.8.0 When I perform the operation I get the information: Lions-Mac:Documents User$ tar -xf qt-everywhere-ios-4.8.0-arm7-nossl.tar.gz -C /Developer tar: could not chdir to '/Developer' Any idea what is wrong?

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• Where does the information shown by OS X Terminal 'Display all commands' feature come from?

  - by Sergio Acosta

  I just learned that if you hit and hold ESC while on the Mac Terminal, a prompt appears after a few seconds offering to show every command available on your system, including aliases, built-ins, and executables on your PATH. Soruce: http://www.mactricksandtips.com/2008/05/list-all-possible-terminal-commands.html However, the output is show through a more filter, and I cannot grep it or pipe it to another command. Does anyone know how this magic output is generated? Is it just generated on the fly by Terminal? Is there a bash command that can be called explicitly on the command line and get the same result? It is mostly curiosity, but I would love to be able to get the results as text I can post-process and not just browse on screen.

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• Insert Hyperlink via VBA

  - by Martin

  I have a Word VBA macro that loops through a directory and writes down the file path of files selected for some criteria into a new Word document. Works well as plain text (as part of a loop): wdDocResults.Content.InsertAfter objFile.Path & Chr(13) However, I'd like them to be hyperlinks. The following works as single macro, but when called from within another script, it does nothing at all (no matter if path is provided as variable or string, or as H:... or \\MyServernameAsNetDrive...): ActiveDocument.Hyperlinks.Add Anchor:=Selection.Range, Address:= objFile.Path, _ SubAddress:="", ScreenTip:="", TextToDisplay:=objFile.Path If try to select the current line in order to make sure something is selected at the right place -- error: out of memory": wrdDocResults.Content.InsertAfter objFil.Path Selection.Expand wdLine ActiveDocument.Hyperlinks.Add Anchor:=Selection.Range, Address:= objFile.Path, _ SubAddress:="", ScreenTip:="", TextToDisplay:=objFile.Path I also tried inserting a string resembling the Hyperlink field code ({ Hyperlink "..." }, which is of course not recognized... Any help is appreciated... Thanks in advance!

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• php startup error Invalid library (maybe not a PHP library) 'pcntl.so'

  - by And-y

  After searching for hours to solve my problem and found nothing helpful I ask my first question here. I want to compile and install php 5.3.17 cli with pcntl extension enabled on a Debian server. The installation was successfull but when I start php cli, the following error is displayed: PHP Warning: PHP Startup: Invalid library (maybe not a PHP library) 'pcntl.so' in Unknown\ on line 0 The following configure is used: './configure' '--prefix=/usr/share' '--datadir=/usr/share/php' '--bindir=/usr/bin' '--libdir=/usr/share' '--includedir=/usr/include' '--with-config-file-path=/etc/php5/cli' '--disable-cgi' '--enable-bcmath' '-- enable-inline-optimization' '--enable-mbstring' '--enable-mbregex' '--enable-pcntl' '--enable-sigchild' '--enable-shmop' '--enable-sysvmsg' '--enable-sysvsem' '--enable-sysvshm' '--with-mysql' '--with-imap' '--with-imap-ssl' '--with-kerberos' In the php.ini following options are set: extension_dir=/usr/lib/php5/20090626/ extension=pcntl.so I hope someone can help me.

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• For Loop counting from 1 to n in a windows bat script

  - by raoulsson

  I need to run a windows command n times within a bat script file. I know how to do this in various programming languages but cannot manage to get it right on the windows command line :-( I would expect something like either for(int i = 0; i < 100; i++) { // do something } or even this (though not entirely seriously) 1.upto(100, { // do something }) Thanks! EDIT I can write a program in java, perl, c or whatever that will generate a bat script that looks like this for %%N in (1 2 3 4 5 6 7 8 9 10 11 12) do echo %%N and so on. Or even "better": echo 1 echo 2 echo 3 echo 4 echo 5 echo 6 echo 7 echo 8 echo 9 echo 10 echo 11 echo 12 and then execute it... But the thing is that I need a concise way to specify a range of numbers to iterate through within the script. Thanks!

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• Any InstallPad alternatives?

  - by ianfuture

  Hi, I'm about to install new bunch of software on a Windows XP Pro PC and found InstallPad as a potential method to do it all. However before using it I was wondering if there were any other similar apps that could be better or easier to use? Requirements (should haves more than must haves): - Free - Easy to use and configure - preferably from point and click in a GUI instead of command line params or config files - Robust - bug free or still in active/ongoing development - Some level of support or active community for help or tips - Pre-existing file lists that can be adapted for own use or used outright. Thanks in advance.. Ian

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• How to put several files in one archive?

  - by Roman

  I have 10 files which I need to send per e-mail. It is inconvenient for me all 10 files and it will be inconvenient for the receiver to download all 10 files (it can be annoying to do the same operation 10 times). I would like to put all 10 files into one files (I think it can be done as archive). How can I do it? Important details. I am working in the Windows 7 and prefer to do the mentioned operation from the command line. In the directory, where I have my 10 files, I have many other files which I would not like to include into the archive. The files are small, so compression rate and size do not play any role. I just one to have an easy way to put 10 files into one and then easily to extract these 10 files.

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• Windows server 2008 UPS support

  - by Rory McCune

  I'm looking to set-up a UPS on a Windows Small Business Berver 2k8 and I've noticed that there are some large price differences for similar capacity in-line UPSs. The most important point for me in UPS selection is that the server should have the ability to shut itself down before the UPS power runs out, so that if the server is unattended during the outage, it should minimize the risk of data loss. From some reading it appears that Windows Server 2008 should has the ability to natively recognise a UPS, which can then be managed through the battery settings on the server or via WMI. What I'm wondering if anyone know is, Is Windows 2008 servers UPS support specific to certain brands of UPS (eg, APC) or is it likely to work with any UPS which has a USB port, which I can connect to the server?

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• Is there a Windows 7 equivalent to the *NIX ability to create a hard link to /dev/null?

  - by minameismud

  I saw another question here that the Windows equivalent to /dev/null is simply NUL. I also know that you can use the mklink command to make sym links (shortcuts) from the command line: MKLINK [[/D] | [/H] | [/J]] Link Target /D Creates a directory symbolic link. Default is a file symbolic link. /H Creates a hard link instead of a symbolic link. /J Creates a Directory Junction. Link specifies the new symbolic link name. Target specifies the path (relative or absolute) that the new link refers to. When I try to use the /j switch to make a hard link ("junction") instead of a simple shortcut to NUL, I get: C:\>mklink /j "C:\Program Files\MyNewHardlinkFolder" NUL Local volumes are required to complete the operation. I can create shortcuts to NUL all day long using the /d switch, but I would much prefer the hard link. Any ideas?

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• php include path problem:Same code works on Ubuntu default Apache and php conf, but not on CentOS

  - by Neo

  So the same code works on my ubuntu server but when I upload it to my dedicated hosting server running CentOS it seems to add an extra prefix of .:/usr/share/pear:/usr/share/php: I tried setting includepath to different things but it just doesn't work. the file is in a directory called language in the same folder as the file that is including it and I'm using : include dirname(FILE).DIRECTORY_SEPARATOR."language".DIRECTORY_SEPARATOR."storage.inc"; and include dirname(__FILE__)."/language/language.php"; and include "language/language.php"; and alot of other combinations but I can't get it to find the file. Fatal error: require_once() [function.require]: Failed opening required '/home/neo/public_html/migration/include/class/core/storage.inc' (include_path='.:/usr/share/pear:/usr/share/php:/home/neo/public_html/migration') in /home/neo/public_html/migration/include/class/core/class_lang.inc on line 153

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• Set up a root server using Ubuntu and Virtualization

  - by Daniel Völkerts

  Hello, I'd like to setup a fresh root server and install a linux based virtualization on it. My thoughts are on: Intel VTs Hardware Ubuntu 9.10 KVM based virt. The access to the root server will only be SSH for Administration. Has anybody done this before, what was your glues discovered in the daily use? My requirements are: very secure, so the root server only has ssh to the dom-0 and minimalistic ports for the guest (e.g. http/s). good monitoring of host/guest (my idea is to using zabbix for it) easy and fast administration (how are the command line tools working for you? cryptiv? high learning curve?) I'm pleased to learn from your suggestions. Regards, Daniel Völkerts

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• How to ignore an error in Powershell and let it continue?

  - by Jake

  I am trying to see if a process is running on multiple servers and then format it into a table. get-process -ComputerName server1,server2,server3 -name explorer | Select-Object processname,machinename Thats the easy part - When the process does not exist or if the server is unavailable, powershell outputs a big ugly error, messes up the the table and doesn't continue. Example Get-Process : Couldn't connect to remote machine.At line:1 char:12 + get-process <<<< -ComputerName server1,server2,server3 -name explorer | format-table processname,machinename + CategoryInfo : NotSpecified: (:) [Get-Process], InvalidOperatio nException + FullyQualifiedErrorId : System.InvalidOperationException,Microsoft.Power Shell.Commands.GetProcessCommand How do I get around this? If the I would still like to get notified if the process isn't available or Running.

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• Problems executing check_mysql plugin

  - by Brian

  I'm attempting to test out the check_mysql plugin for Nagios using the command line. It works great when I'm just checking localhost but when I try to specify a different server (using the -H argument) I keep getting the following error message: CRITICAL - Unable to connect to mysql://nagios_user@{remoteServerHostname}/ - Access denied for user 'nagios_user'@'{localServerHostName}' (using password: YES) It looks like it's trying to connect to the database using the localhost server even though I've specified a different host name. I've already set up this user on the remote database and they have correct permissions. I'm just trying to figure out why the script keeps inserting the localhost server name instead of the remote one.

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