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• mod_ssl RPM conflict

  - by 0A0D

  I build Apache httpd into an RPM using these sites: http://erikwebb.net/blog/compile-and-install-apache-24-red-hat-enterprise-linux-rhel-6-or-centos-6 http://ramblin-dude.blogspot.com/2013/04/compiling-rpm-for-httpd-on-rhel-57.html I was successful at building apr* and httpd*. However, when I try to install httpd using rpm -Uvh httpd-devel-2.2.25-1.x86_64.rpm httpd-2.2.25-1.x86_64.rpm mod_ssl-2.2.25-1.x86_64.rpm I get the following error: package mod_ssl-2.2.3-82.el5_9.x86_64 (which is newer than mod_ssl-2.2.25-1.x86_64) is already installed. I have httpd 2.2.3-82 installed. Do I need to remove it first? Seems counterintuitive.

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• Keyboard layout to shift wasd keys

  - by Joel Coehoorn

  I like to play video games on my computer. One of the things that bugs me, though, is how the wasd keys became the standard movement keys in first person shooters and mmorpgs. To me, esdf makes a lot more sense, because that matches your normal hand placement for typing. "Fixing" that layout is always the first thing I do when installing a new game. Sadly, this is often a pain in the neck, and some games won't let you do it at all. Is there an alternative keyboard layout you can install that will just switch these around, so the wasd keys fall in the esdf positions? And is low-level enough two work with DirectX/DirectInput, perhaps that works with the language bar for easy swapping back and forth?

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• Distribute Nagios to reduce false alarms

  - by GDR

  I'm currently running a single Nagios instance. From time to time, I'm getting false alarms about timeouts - for example, it says that HTTP is down on some server, but when I open it in my browser several seconds later, it loads fast, and in general there is no trace of an error. What can I do to reduce such false alarms? I'm guessing that it's because of transient network issues on my monitoring server. I guess that setting up another monitoring server on a different network would greatly help, but how do I plug it into Nagios? Is it at all possible with Nagios or do I have to switch to another monitoring system? I like my configs and, if possible, I'd like to stay with Nagios or something compatible (Icinga?)

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• Library conflict in Mac OS X

  - by Juan Medín

  I was trying to install the ImageMagick library on Mac OS X Snow Leopard, and first I tried port and, after it failed, homebrew. It updated some dependencies and installed ImageMagick without problems. So far so good. The problem came when I ran Apache. I got the following error in the system log: 07/04/11 12:55:15 org.apache.httpd[41841] httpd: Syntax error on line 115 of /private/etc/apache2/httpd.conf: Cannot load /opt/local/apache2/modules/libphp5.so into server: dlopen(/opt/local/apache2/modules/libphp5.so, 10): Library not loaded: /opt/local/lib/libpng12.0.dylib\n Referenced from: /opt/local/apache2/modules/libphp5.so\n Reason: image not found I checked the /opt/local/lib and surprise! I don't have the libpng12.0 but the libpng14.0. So, as far as I can tell, something went wrong installing the ImageMagick library. Now, I can't find a way to rollback to the previous libraries, other than copying them from the backup. Do you know if is there a way to recover the previous state or reinstall Apache? Or is this just a corrupt state and I must reinstall OS X?

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• JBoss naming service port conflict

  - by Kramer

  I am having trouble getting JBoss started. I am running JBoss 5.1.0 on Mac OSX (yes, I know it is an old version, but that’s what the application is certified on for now). I am using Apple’s JVM 1.6.0_37. I get the following error when trying to use JBoss (there are some more exceptions, but these are the first few): Error installing to Start: name=jboss:service=Naming state=Create mode=Manual requiredState=Installed java.rmi.server.ExportException: Port already in use: 1098; nested exception is: java.net.BindException: Can't assign requested address at sun.rmi.transport.tcp.TCPTransport.listen(TCPTransport.java:310) at sun.rmi.transport.tcp.TCPTransport.exportObject(TCPTransport.java:218) Caused by: java.net.BindException: Can't assign requested address at java.net.PlainSocketImpl.socketBind(Native Method) at java.net.PlainSocketImpl.bind(PlainSocketImpl.java:383) 16:57:15,596 ERROR [AbstractKernelController] Error installing to Real: name=vfsfile:/Users/home/server/jboss-5.1.0.GA/server/myserver/conf/jboss-service.xml state=PreReal mode=Manual requiredState=Real org.jboss.deployers.spi.DeploymentException: Error deploying: jboss:service=Naming at org.jboss.deployers.spi.DeploymentException.rethrowAsDeploymentException(DeploymentException.java:49) at org.jboss.system.deployers.ServiceDeployer.deploy(ServiceDeployer.java:118) at org.jboss.system.deployers.ServiceDeployer.deploy(ServiceDeployer.java:46) Caused by: java.rmi.server.ExportException: Port already in use: 1098; nested exception is: java.net.BindException: Can't assign requested address at sun.rmi.transport.tcp.TCPTransport.listen(TCPTransport.java:310) Caused by: java.net.BindException: Can't assign requested address at java.net.PlainSocketImpl.socketBind(Native Method) Now I know what you are thinking, that I am running something that conflicts with that port, but I have used lsof and there is nothing listed on that port. I have tried changing the port in conf/bindingservice.beans/META-INF/bindings-jboss-beans.xml: <bean class="org.jboss.services.binding.ServiceBindingMetadata"> <property name="serviceName">jboss:service=Naming</property> <property name="bindingName">RmiPort</property> <property name="port">5098</property> <property name="description">Socket Naming service uses to receive RMI requests from client proxies</property> </bean> Unfortunately, I then get the name errors with the new port number. I also installed a network monitoring tool on my box and it doesn't look like any ports are being opened when I start jboss, but it is possible, that the tool might be missing a port that is opened and then closed quickly. Any ideas what could be the problem or how to fix it?

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• How to reduce 3rd party repository priority in apt

  - by carlosz

  I'm using Debian Testing together with the Deb Multimedia (previously Debian Multimedia) repository for testing. I want to reduce the priority of the deb-multimedia packages so it only installs certain packages. I've tried with: Package: * Pin: release o="Unofficial Multimedia Packages" Pin-Priority: 10 and Package: * Pin: origin "mirror.home-dn.net" Pin-Priority: 10 But neither works, the packages still have the default priority (500). The Release file from the repository looks like this: Archive: testing Version: None Component: main Origin: Unofficial Multimedia Packages Label: Unofficial Multimedia Packages Architecture: amd64 What am I doing wrong? Edit: It worked when I used the Version information instead: Package: * Pin: release v=None Pin-Priority: 10 But I still don't know the reason the other filters didn't work.

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• How SSD's drives reduce their latency?

  - by tigrou

  First time i read some information about SSD's, i was surprised to learn they internally use NAND flash chips. This kind of memory is generally slow (low bandwidth) and have high latency while SSD's are just the opposite. But here is how it works : SSD drives increase their bandwidth by using several NAND flash chips in parallel. In other words, they do some data striping (aka RAID0) across several chips (done by the controller). What i don't understand is how SSD's drives managed to reduce latency? (or at least lot better than what a single NAND chip without any controller can do)

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• Can my PC run Need for Speed Shift

  - by John

  Here are my PC's specs: Operating System MS Windows 7 32-bit CPU Intel Mobile Core 2 Duo T8100 @ 2.10GHz Penryn 45nm Technology RAM 3.0GB Dual-Channel DDR2 @ 332MHz 5-5-5-15 Motherboard Sony Corporation VAIO (N/A) Graphics Nvidia Defaul @ 1280x800 256MB GeForce 8400M GT (Sony) Hard Drives 250GB Hitachi Hitachi HTS542525K9SA00 ATA Device (IDE) Optical Drives Optiarc DVD RW AD-7560A ATA Device Audio High Definition Audio Device

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• Bridging and iptables SNAT conflict

  - by sad_admin

  Hello I am working on a setup here and have it working with one minor exception. Devices on one side of my bridge aren't getting SNAT'd to the Internet. The Diagram / Overview: Primary_Network (Site_A) | | Internet ------- Linux_Bridge_GW (GW) | | Secondary/CoLo Site (Site_B) Here is the setup: 1.) Site_A has all the production servers and workstations. 2.) Site_B has a set of servers that we would like to fail-over to and also serve our internet facing services from. 3.) GW has two interfaces that are trunked and carrying the appropriate VLAN traffic (allow layer-2 propagation of traffic between sites) //this all works perfectly fine. 4.) The problem that is being encountered is, hosts from Site_B have their default GW at Site_A (same subnet) GW does not have IPs on the VLANs that are being passed. 5.) All hosts at Site_A can reach the Internet without problem. 6.) GW has an addresses on a subnet that is ONLY for Internet destined traffic. (This was done so that Websense would not have to parse unnecessary traffic. We use this VLAN as the monitor port's source on the switch where Websense is sitting). What I think is happening: 1.) Packet/Frame comes in on physdev at Site_B destined for Internet. 2.) Kernel sees packet, and forwards it out the other side of the bridge to that host's default GW. 3.) Site_A (containing core-network's Default-GW) sees that packet is destined for a host it doesn't know about, so it sends it to it's default GW (the linux bridge, since it's Internet bound). 4.) The kernel says "Hey, I've seen you before" and therefore doesn't do SNAT'ing on the packet and sends it out to the Internet where it's black-holed. Why I think it's happening: 1.) A tcpdump on the internet facing NIC shows the packet leaving the interface with the private address as it's source. What I would like: 1.) Have the packet SNAT'd. 2.) Something like the below would be awesome a.) packet comes in from Site_B b.) kernel sees that the packet is NOT destined for itself or any private address c.) kernel says "OK, well since you're destined for the Internet I'm going to send you out this interface rather than forward you to your normal default GW that's WAAAY over there." d.) packet comes in from internet and is sent out the appropriate bridge physdev depending on which site the host it's destined for is at. Thanks for any assistance or guidance that you are willing to offer. Best Regards, Sad Admin

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• ZendServer uninstall and xampp install ports conflict

  - by BlackFire27

  I uninstalled zend, cleaned it from the registry (it doesnt exist there).. when I go to localhost , I can see its favicon. Also my xampp port is blocked by the previous installation of zend that uses the port 80.. so I swapped xampps port to 8080.. it works..but I would rather to use port of 80.. is there a way to achieve so? perhaps changing zends port to something else? or how can I find who is listening to the same port.. By what I can see is that zend is still using the localhost..how i sthat possible

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• VLAN Configuration Conflict, Who Wins?

  - by Kevin

  I'm new to VLANs, so take that into consideration... Lets say that I had a server set up to create a virtual interface that is set to be tagged as VLAN 3. For example, the following Debian config: iface eth0.1 inet static address 192.168.1.1 netmask 255.255.255.0 Now on my switch, lets say that I have the port that the aforementioned server connects to, set to VLAN 4... Who wins? What are the packets tagged as, as viewed by the rest of the network?

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• python histogram one-liner

  - by mykhal

  there are many ways, how to code histogram in Python. by histogram, i mean function, counting objects in an interable, resulting in the count table (i.e. dict). e.g.: >>> L = 'abracadabra' >>> histogram(L) {'a': 5, 'b': 2, 'c': 1, 'd': 1, 'r': 2} it can be written like this: def histogram(L): d = {} for x in L: if x in d: d[x] += 1 else: d[x] = 1 return d ..however, there are much less ways, how do this in a single expression. if we had "dict comprehensions" in python, we would write: >>> { x: L.count(x) for x in set(L) } but we don't have them, so we have to write: >>> dict([(x, L.count(x)) for x in set(L)]) however, this approach may yet be readable, but is not efficient - L is walked-through multiple times, so this won't work for single-life generators.. the function should iterate well also through gen(), where: def gen(): for x in L: yield x we can go with reduce (R.I.P.): >>> reduce(lambda d,x: dict(d, x=d.get(x,0)+1), L, {}) # wrong! oops, does not work, the key name is 'x', not x :( i ended with: >>> reduce(lambda d,x: dict(d.items() + [(x, d.get(x, 0)+1)]), L, {}) (in py3k, we would have to write list(d.items()) instead of d.items(), but it's hypothethical, since there is no reduce there) please beat me with a better one-liner, more readable! ;)

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• Hadooop map reduce

  - by Aina Ari

  Im very much new to map reduce and i completed hadoop wordcount example. In that example it produces unsorted file (with key value) of word counts. So is it possible to make it sorted according to the most number of word occurrences by combining another map reduce task to the earlier one. Thanks in Advance

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• Reduce number of points in line

  - by culebrón

  I'm searching for algorithms to reduce the LOD of polylines, lines (looped or not) of nodes. In simple words, I want to take hi-resolution coastline data and be able to reduce its LOD hundred- or thousandfold to render it in small-scale. I found polygon reduction algorithms (but they require triangles) and Laplacian smoothing, but that doesn't seem exactly what I need.

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• How to reduce UIImage size to a maximum as possible

  - by Tharindu Madushanka

  I am using following code to resize the image. Resize a UIImage Right Way And I use interpolation quality as kCGInterpolationLow. And then I use UIImageJPEGRepresentation(image,0.0) to get the NSData of that image. Still its a little bit high in size around 100kb. when I send it over the network. Can I reduce it further. If I am to reduce it more what could I do ? Thanks and Kind Regards,

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• Refactor custom wizard to reduce flicker

  - by Matthew Brown

  I have implemented a custom wizard control in C# windows forms by creating a base form which has the shared components and then making child forms for each step of the process. I then have a class which hides/shows the child forms when you move from one step to another. The problem is that flickering is bad when moving between forms. Does anyone know a way to either keep this method and reduce the flicker or refactor it to make it use a single form (which should definitely reduce the flicker)?

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• How to compress the responses to reduce page weight in .net

  - by spj

  Hi Can anyone suggest the ways we can choose to reduce the size of the rendered html or response to reduce page weight in .net so that the client can experience a faster loading of the UI i've heard of JSON and GZip but don't have much idea about how to use it or even better ways are there

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• Reduce Triangle in DirectX 9

  - by Himadri

  Hello everyone, I have a 3D object with about 2000 or 3000 triangles. I want to reduce the number of triangle without affecting shape of object. for eg, I have two triangles, (1,1.5,2) (1.5,1.5,2) (1.7,2,2) (1.5,1.5,2) (1.7,2,2) (2,1.5,2) In this case these two triangle is same as a single triangle - (1,1.5,2) (2,1.5,2) (1.7,2,2) I dont want the manual method, But if there is any direct function or such thing which will reduce my triangle list. Thank You.

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• jQuery AJAX Loading Page Content Only After I Press Shift Key

  - by Cosmin

  My ajax + jquery loading page only after holding shift key and duplicate new empty window. If I press the loading button nothing hapen, only after I press shift key I get to load the page correctly... this is my ajax script: $(document).ready(function () { $(".getUsersA").click(function () { $.ajax({ beforeSend: function () { $(".gridD").html(spinner) }, url: 'lib/some_url.php', type: 'POST', data: ({ data1:'2013-09-01' }), success: function (results) {$(".gridD").html(results);} }); }); }); I have a second js file with just this line of code for spinner var spinner = "<img src='images/spinner.gif' border='0'>"; html code: <html> <head> <title>Title</title> <script type="text/javascript" src="js/jquery-1.10.2.js"></script> <script type="text/javascript" src="js/ajax.js"></script> <script type="text/javascript" src="js/general.js"></script> </head> <body> <h1>Putting it all tugether ... with jQuery</h1> <div class="thedivD"><a href="" class="buttonA getUsersA">Get Users</a></div> <h3>jQuery results</h3> <div class="gridD"></div> </body> </html>

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• svn merge from trunk to branch conflict for a file deleted in the trunk

  - by Riccardo Galli

  After a subversion merge from trunk to branch, I got a conflict because a file has been deleted in the trunk and modified in the branch. I would like to keep the trunk choice, but using "svn resolve --accept theirs-full" from the branch directory tells me svn: warning: Tree conflicts can only be resolved to 'working' state; '/path/to/file' not resolved What should I do to have the file correctly deleted in the branch ?

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• automating write conflict messages

  - by archer

  is there any method to avoid the annoying write conflict messages by automating and hiding the process so that it doesn't appear as if the program is defective? there doesn't seem to be any point to these messages anyway as there is only one real choice which is to drop the changes.

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• How do I manage conflict in the workplace?

  - by JoelFan

  My workplace has an excessive amount of personal conflict among developers. There are some legitimate technical disagreements involved, but I wish it could be kept to a discussion about issues and not about people. Is there anything I can do about this from my lowly position, being that I don't have any formal leadership role on the team?

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• SVN Tree Conflict Errors

  - by John

  I seem to see such errors quite often in our SVN 1.6 repo. We got these quite a lot while we used to just work on /trunk so I don't think it's due to merge/branching confusion. It seems that a cleup and marking the conflict resolved always works, but it's a little concerning to see errors in your version control system when you're just adding/updating/deleting files. What causes it?

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• javascript conflict on accesing DOM

  - by justjoe

  i read this statement from a book i read The Document Object Model or DOM is really not a part of JavaScript but a separate entity existing outside it. Although you can use JavaScript to manipulate DOM objects, other scripting languages may equally well access them too. what is the best way to avoid conflict between javascript and other client-siede scripting language when we have to deal with XMLHTTPRequest object

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• Cannot resolve the collation conflict ???

  - by HAJJAJ

  hi guys I had this error and i don't know how to fix it Message=Cannot resolve the collation conflict between "Arabic_CI_AS" and "SQL_Latin1_General_CP1_CI_AS" in the equal to operation. note: I already change the collation from the database option -- Collation i change it from "Arabic_CI_AS" to "SQL_Latin1_General_CP1_CI_AS" and i am still getting the same error !! any suggestion to solve this ?

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