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• Why is everything crashing?

  - by Kopkins

  I've been using Ubuntu for a while now and I love it, I wouldn't think of using another OS unless I can't fix this issue. The install I'm on is only around a month and a half old. I'm running 12.04 64bit on a 8,1 MBP. Up until around 2 weeks ago everything was running smoothly. Around then applications started crashing and weird things started happening. At first I thought it was just certain applications. The first thing to start giving me trouble was compiz. Occasionally compiz will stop decorating windows and lost many other functionalities. running compiz --replace fixes this, but I don't feel like doing it usually once a day. The other thing with this is that after running compiz --replace, my conky window gets lost somewhere and so I run killall conky && conky -c .conkyrc. But this isn't with just a couple applications, it seems like it is proliferating through my system. Last week fontforge started crashing while doing whatever task. So I ended up unable to finish what I was working on to completeness. Didn't find a fix. Today rhythmbox started crashing. Whenever I try to play anything, Rhythmbox becomes unresponsive and needs to be forced to close. When I try to do certain things with the disk utility, it crashes. I get the Ubuntu has experienced an internal error message much more often than I would like. Frequently applications stop appearing in the launcher. Wine almost never does anymore. After not being active for a little while, thunderbird can only fetch my mail after restarting wireless, sudo rmmod b43 && sudo modprobe b43 Occasionally some of my startup apps don't start. What is my best option here? Could they be bugs? I don't want to submit a ton of vague bug reports. Reinstall? switch OS? Thank you to anyone who responds. Kopkins

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• Best system for creating a 2d racing track

  - by tesselode

  I am working a 2D racing game and I'm trying to figure out what is the best way to define the track. At the very least, I need to be able to create a closed circuit with any amount of turns at any angle, and I need vehicles to collide with the edges of the track. I also want the following things to be true if possible (but they are optional): The code is simple and free of funky workarounds and extras I can define all of the parts of the track (such as turns) relative to the previous parts I can predict the exact position of the road at a certain point (that way I can easily and cleanly make closed circuits) Here are my options: Use a set of points. This is my current system. I have a set of turns and width changes that the track is supposed to make over time. I have a point which I transform according to these instructions, and I place a point every 5 steps or so, depending on how precise I want the track to be. These points make up the track. The main problem with this is the discrepancy between the collisions and the way the track is drawn. I won't get into too much detail, but the picture below shows what is happening (although it is exaggerated a bit). The blue lines are what is drawn, the red lines are what the vehicle collides with. I could work around this, but I'd rather avoid funky workaround code. Beizer curves. These seem cool, but my first impression of them is that they'll be a little daunting to learn and are probably too complicated for my needs. Some other kind of curve? I have heard of some other kinds of curves; maybe those are more applicable. Use Box2D or another physics engine. Instead of defining the center of the track, I could use a physics engine to define shapes that make up the road. The downside to this, however, is that I have to put in a little more work to place the checkpoints. Something completely different. Basically, what is the simplest system for generating a race track that would allow me to create closed circuits cleanly, handle collisions, and not have a ton of weird code?

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• Entity Framework 5, separating business logic from model - Repository?

  - by bnice7

  I am working on my first public-facing web application and I’m using MVC 4 for the presentation layer and EF 5 for the DAL. The database structure is locked, and there are moderate differences between how the user inputs data and how the database itself gets populated. I have done a ton of reading on the repository pattern (which I have never used) but most of my research is pushing me away from using it since it supposedly creates an unnecessary level of abstraction for the latest versions of EF since repositories and unit-of-work are already built-in. My initial approach is to simply create a separate set of classes for my business objects in the BLL that can act as an intermediary between my Controllers and the DAL. Here’s an example class: public class MyBuilding { public int Id { get; private set; } public string Name { get; set; } public string Notes { get; set; } private readonly Entities _context = new Entities(); // Is this thread safe? private static readonly int UserId = WebSecurity.GetCurrentUser().UserId; public IEnumerable<MyBuilding> GetList() { IEnumerable<MyBuilding> buildingList = from p in _context.BuildingInfo where p.Building.UserProfile.UserId == UserId select new MyBuilding {Id = p.BuildingId, Name = p.BuildingName, Notes = p.Building.Notes}; return buildingList; } public void Create() { var b = new Building {UserId = UserId, Notes = this.Notes}; _context.Building.Add(b); _context.SaveChanges(); // Set the building ID this.Id = b.BuildingId; // Seed 1-to-1 tables with reference the new building _context.BuildingInfo.Add(new BuildingInfo {Building = b}); _context.GeneralInfo.Add(new GeneralInfo {Building = b}); _context.LocationInfo.Add(new LocationInfo {Building = b}); _context.SaveChanges(); } public static MyBuilding Find(int id) { using (var context = new Entities()) // Is this OK to do in a static method? { var b = context.Building.FirstOrDefault(p => p.BuildingId == id && p.UserId == UserId); if (b == null) throw new Exception("Error: Building not found or user does not have access."); return new MyBuilding {Id = b.BuildingId, Name = b.BuildingInfo.BuildingName, Notes = b.Notes}; } } } My primary concern: Is the way I am instantiating my DbContext as a private property thread-safe, and is it safe to have a static method that instantiates a separate DbContext? Or am I approaching this all wrong? I am not opposed to learning up on the repository pattern if I am taking the total wrong approach here.

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• Ad-hoc reporting similar to Microstrategy/Pentaho - is OLAP really the only choice (is OLAP even sufficient)?

  - by TheBeefMightBeTough

  So I'm getting ready to develop an API in Java that will provide all dimensions, metrics, hierarchies, etc to a user such that they can pick and choose what they want (say, e.g., dimensions of Location (a store) and Weekly, and the metric Product Sales $), provide their choices to the api, and have it spit out an object that contains the answer to their question (the object would probably be a set of cells). I don't even believe there will be much drill up/down. The data warehouse the APIwill interface with is in a standard form (FACT tables, dimensions, star schema format). My question is, is an OLAP framework such as Mondrian the only way to achieve something akin to ad-hoc reporting? I can envisage a really large Cube (or VirtualCube) that contains most of the dimensions and metrics the user could ever want, which would give the illusion of ad-hoc reporting. The problem is that there is a ton of setup to do (so much XML) to get the framework to work with the data. Further it requires specific knowledge, such as MDX, and even moreso learning the framework peculiars (Mondrian API). Finally, I am not positive it will scale much better than simply making queries against a SQL database. OLAP to me feels like very old technology. Is performance really an issue anymore? The alternative I can think of would be dynamic SQL. If the existing tables in the data warehouse conform to a naming scheme (FACT_, DIM_, etc), or if a very simple config file/ database table containing config information existed that stored which tables are fact tables, which are dimensions, and what metrics are available, then couldn't the api read from that and assembly the appropriate sql query? Would this necessarily be harder than learning MDX, Mondrian (or another OLAP framework), and creating all the cubes? In general, I feel that OLAP is at the same time too powerful (supports drill up/down, complex functions) and outdated and am reluctant to base my architecture on it. However, I am unsure if the alternative(s), such as rolling my own ad-hoc reporting framework using dynamic SQL would remove any complexity while still fulfilling requirements, both functional and non-functional (e.g., scalability; some FACT tables have many millions of rows). I also wonder about other techniques (e.g., hive). Has anyone here tried to do ad-hoc reporting? Any advice? I expect this project to take a pretty long time (3 months min, but probably longer), so I just do not want to commit to an architecture without being absolutely sure of its pros and cons. Thanks so much.

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• Protobuf design patterns

  - by Monster Truck

  I am evaluating Google Protocol Buffers for a Java based service (but am expecting language agnostic patterns). I have two questions: The first is a broad general question: What patterns are we seeing people use? Said patterns being related to class organization (e.g., messages per .proto file, packaging, and distribution) and message definition (e.g., repeated fields vs. repeated encapsulated fields*) etc. There is very little information of this sort on the Google Protobuf Help pages and public blogs while there is a ton of information for established protocols such as XML. I also have specific questions over the following two different patterns: Represent messages in .proto files, package them as a separate jar, and ship it to target consumers of the service --which is basically the default approach I guess. Do the same but also include hand crafted wrappers (not sub-classes!) around each message that implement a contract supporting at least these two methods (T is the wrapper class, V is the message class (using generics but simplified syntax for brevity): public V toProtobufMessage() { V.Builder builder = V.newBuilder(); for (Item item : getItemList()) { builder.addItem(item); } return builder.setAmountPayable(getAmountPayable()). setShippingAddress(getShippingAddress()). build(); } public static T fromProtobufMessage(V message_) { return new T(message_.getShippingAddress(), message_.getItemList(), message_.getAmountPayable()); } One advantage I see with (2) is that I can hide away the complexities introduced by V.newBuilder().addField().build() and add some meaningful methods such as isOpenForTrade() or isAddressInFreeDeliveryZone() etc. in my wrappers. The second advantage I see with (2) is that my clients deal with immutable objects (something I can enforce in the wrapper class). One disadvantage I see with (2) is that I duplicate code and have to sync up my wrapper classes with .proto files. Does anyone have better techniques or further critiques on any of the two approaches? *By encapsulating a repeated field I mean messages such as this one: message ItemList { repeated item = 1; } message CustomerInvoice { required ShippingAddress address = 1; required ItemList = 2; required double amountPayable = 3; } instead of messages such as this one: message CustomerInvoice { required ShippingAddress address = 1; repeated Item item = 2; required double amountPayable = 3; } I like the latter but am happy to hear arguments against it.

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• How do I hide "Extra File" and "100%" lines from robocopy output?

  - by Danny Tuppeny

  I have a robocopy script to back up our Kiln repositories that runs nightly, which looks something like this: robocopy "$liveRepoLocation" "$cloneRepoLocation" /MIR /MT /W:3 /R:100 /LOG:"$backupLogLocation\BackupKiln.txt" /NFL /NDL /NP In the output, there are a ton of lines that contain "Extra file"s, like this: *EXTRA File 153 E:\Kiln Backup\elasticsearch\data\elasticsearch-kiln\nodes\0\indices\kiln-2\0\index\_yxe.fdt *EXTRA File 12 E:\Kiln Backup\elasticsearch\data\elasticsearch-kiln\nodes\0\indices\kiln-2\0\index\_yxe.fdx *EXTRA File 128 E:\Kiln Backup\elasticsearch\data\elasticsearch-kiln\nodes\0\indices\kiln-2\0\index\_yxe.fnm *EXTRA File 363 E:\Kiln Backup\elasticsearch\data\elasticsearch-kiln\nodes\0\indices\kiln-2\0\index\_yxe.frq *EXTRA File 13 E:\Kiln Backup\elasticsearch\data\elasticsearch-kiln\nodes\0\indices\kiln-2\0\index\_yxe.nrm Additionally, there are then hundreds of lines at the bottom that contain nothing but "100%"s, like this: 100% 100% 100% 100% 100% 100% 100% In addition to making the log files enormous (there are a lot of folders/files in Kiln repos), it makes it annoying to scan through the logs now and then to see if everything was working ok. How do I stop "Extra Files" appearing in the log? How do I stop these silly "100%" lines appearing in the log? I've tried every combination of switch I can think of (the current switches are listed above in the command), but neither seem to hide these!

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• Drobo FS vs. MacBook Pro: Finder works, Drobo Dashboard doesn't

  - by dash-tom-bang

  Does anyone have any experience with the new Drobo FS, specifically using it from a MacBook Pro? My experience thus far is this: Set up the Drobo Dashboard software (hereinafter called simply 'Dashboard') on my WinXP machine, which is hard-wired to the network to do the data migration from my NAS-that's-being-replaced (a 250G SimpleShare which works well enough but I was always afraid of losing the one disk). The Dashboard seems to work ok, except that the DroboCopy function doesn't work at all. This is the backup solution, which I can configure, and if I launch it (e.g. to back up from the old NAS to the Drobo) it spins the NAS, seeking the drive all over hell and creation, until finally giving up an hour+ later with zero files copied. Selecting only a subset of the data yields the same effect albeit more quickly. On my Mac I installed the Dashboard software too, since most of my fiddling with the device will be from my couch in the living room. Finder connects to the box just fine, fwiw, but Dashboard just sits there, "waiting for connection." This is considerably more bothersome than the above paragraph, but I figured I'd give whatever information I have. Drobo is insisting that I send them this "Debug Log" file that their software generates. Does anyone know what's in it? It's encrypted and they won't tell me, which spooks me just a bit; not like I'm terribly concerned about privacy but I don't want to be sending personal information out to every clown who says they "need" it in order to help me. thanks a ton, -tom!

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• saslauthd using too much memory

  - by Brian Armstrong

  Woke up today to see my site slow/unresponsive. Pulled up top and it looks like a ton of saslauthd processes have spun up using about 64m of RAM each, causing the machine to enter swap space. I've never seen this many used on there. top - 16:54:13 up 85 days, 11:48, 1 user, load average: 0.32, 0.50, 0.38 Tasks: 143 total, 1 running, 142 sleeping, 0 stopped, 0 zombie Cpu(s): 0.7%us, 0.3%sy, 0.0%ni, 97.3%id, 0.2%wa, 0.0%hi, 0.0%si, 1.4%st Mem: 1048796k total, 1025904k used, 22892k free, 14032k buffers Swap: 2097144k total, 332460k used, 1764684k free, 194348k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 848 admin 20 0 263m 115m 4840 S 0 11.3 5:02.91 ruby 906 admin 20 0 265m 113m 4828 S 0 11.1 5:37.24 ruby 30484 admin 20 0 248m 91m 4256 S 6 9.0 219:02.30 delayed_job 4075 root 20 0 160m 65m 952 S 0 6.4 0:24.22 saslauthd 4080 root 20 0 162m 64m 936 S 0 6.3 0:24.48 saslauthd 4079 root 20 0 162m 64m 936 S 0 6.3 0:24.70 saslauthd 4078 root 20 0 164m 63m 936 S 0 6.2 0:24.66 saslauthd 4077 root 20 0 163m 62m 936 S 0 6.1 0:24.66 saslauthd 3718 mysql 20 0 312m 52m 3588 S 1 5.1 3499:40 mysqld 699 root 20 0 72744 7640 2164 S 0 0.7 0:00.50 ruby 15701 postfix 20 0 106m 5712 4164 S 1 0.5 0:00.50 smtpd 15702 postfix 20 0 52444 3252 2452 S 1 0.3 0:00.06 cleanup 4062 postfix 20 0 41884 3104 1788 S 0 0.3 125:26.01 qmgr 15683 root 20 0 51504 2780 2180 S 0 0.3 0:00.04 sshd 14595 postfix 20 0 52308 2548 2304 S 1 0.2 0:24.60 proxymap 15483 postfix 20 0 43380 2544 1992 S 0 0.2 0:00.38 smtp 15486 postfix 20 0 43380 2544 1992 S 0 0.2 0:00.36 smtp 15488 postfix 20 0 43380 2540 1992 S 0 0.2 0:00.38 smtp 15485 postfix 20 0 43380 2532 1984 S 0 0.2 0:00.36 smtp 15489 postfix 20 0 43380 2532 1984 S 0 0.2 0:00.40 smtp Wasn't sure what Saslauthd is, Google says it handles plantext authentication. The machine has been sending a lot of email through postfix, so this could be related. Anyone know why so many may have spun up? Are they safe to kill? Thanks!

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• Quick, Linux-compatible unit-aware calculator

  - by endolith

  I want to be able to press a keyboard combination, start typing a mathematical expression that includes units and slightly advanced math (not just a four-function calculator), and get a result immediately, in units that I specify, that I can copy and paste. Currently I open Firefox and press Ctrl+K, type in the search box, and it usually gives me a result in the drop-down from Google Calculator. It doesn't always, though, so I press "=" at the end, wait for a result, remove the equals, wait for a result, realize it doesn't understand the way I typed a unit, open the result in a new tab, etc. it sucks. Wolfram Alpha is smarter, but very much slower, and the output is all images, not text, and I don't have a quick widget for it, if such a thing could even exist. GNU units has a ton of units, which is great, and I can define my own units, which is great, but they have to be written in specific, unintuitive ways, it doesn't handle much advanced math, and I'd need to open a terminal, start units, etc. I hate the command line. I wasted a lot of time trying to make front-ends for units in Deskbar and Launchy, but I'm not a real coder and I don't use either of those anymore. Any other solutions or enhancements of these?

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• managing a high traffic media sharing website

  - by Jordan Westerman

  i'm in the process of developing a website that i predict will generate a lot of traffic. the site will be similar to many other sites offering free media streaming: mp3's. we are going to start with a pretty minimal amount of media to share, but the basic idea is that artists will set up a profile page with music they have made available for consumers to visit the page and listen to the music. we are starting with just a handful of artists, but i think that this project will generate more and more artist pages. eventually i'd like to set it up so consumers can create personalized playlists. how can i best prepare server space and bandwidth capabilities? i have a small team of web designers and programmers working on the site, as i am pretty illiterate when it comes to site management. as the ring leader of this organization, i am more or less looking for financial requirements and monthly burn rate estimates. i don't have a ton of capitol to start with, putting together a business plan, but i am seeking investments. i have a game plan to grow fast enough to be successful, and slow enough to manage the financial growth requirements. any questions i may have failed to ask myself? is it realistic to start this project on a shared server, and upgrade? any financial advice you think i can use? i really appreciate any advice given, as this is my first business venture. thank you all in advance. Jordan Westerman D.B.A. Badfish Productions, LLC

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• Why can't I unblock postgres with shorewall?

  - by ryeguy

  I can't seem to unblock the port needed for postgres using Shorewall. I am developing a PHP app on my windows machine here, and then I upload it on my linux box to actually use it. The linux box runs the php files as well as hosts the db server. Since I need it working from both machines, in my PHP code I am referring to the database as the full IP instead of localhost. I can easily connect to postgres from my windows machine, but ironically, my PHP app can't connect to postgres even though it's on the same box. Here's what I have in /etc/shorewall/rules: #macro/action src dest PostgreSQL/ACCEPT net $FW PostgreSQL/ACCEPT loc $FW PostgreSQL/ACCEPT loc dmz PostgreSQL/ACCEPT net dmz PostgreSQL/ACCEPT loc net PostgreSQL/ACCEPT dmz $FW PostgreSQL/ACCEPT dmz loc PostgreSQL/ACCEPT dmz net PostgreSQL/ACCEPT dmz dmz Clearly I have a ton of crap there. The first line is all I needed to make it allow a connection from my windows machine. All the lines after it are me just trying everything to get it to work. What am I missing?

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• Purge print driver cache on windows 7 with powershell script

  - by Doltknuckle

  [Background] We have been having trouble with our network clients suddenly being unable to print. They get an odd error with a hex code. We determined that something in the driver was messed up and we could resolve the issue by clearing the driver cache and reinstalling the driver. This happens to random computers every so often. We're assuming this is a bug with the latest Dell 2330dn driver since that is the only model that has this problem. [Problem] What we are looking to do is write a Powershell script that would clear the driver cache and redownload the driver. I see a ton of scripts out there to manage queues, servers, and ports, but nothing for local driver cache management. [Current Workaround] Since we have to do this manually, I'll write out the steps so you know what we want this script to replicate. Disable print spooler Restart machine Delete contents of: C:\windows\system32\spool\drivers\w32x86 Enable print spooler and start service. Delete the network printer object and re-add network printer off of server. [Request] I'm good enough with powershell to translate the above workaround into a pair of scripts. I'd like to find a more elegant solution then my current workaround. Any suggestions?

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• Cisco Catalyst 3750 connected to Cisco ASA 5505 and dropping packets

  - by Bo102010

  (Cross posted from Super User per suggestion there) At the office, I have inherited a network that I am still trying to fully comprehend. I have a problem today with a new connection between: A port on a Cisco Catalyst 3750 [WS-C3750G-48TS-S running C3750-IPSERVICESK9-M version 12.2(53)SE1] A port on a Cisco ASA 5505 [ASA Software version 8.3(2)] The 3750 is home to a Vlan that has a few ports assigned to it. interface Vlan3 description Internal network (172.18.160.0/24) ip address 172.18.160.1 255.255.255.0 I have a host (outside of my control) that needs to be in this VLAN (i.e it must have an address 172.18.160.something/24) that also needs to access the Internet. To accomplish this, I ran a link from the Catalyst (Gi1/0/13) to the ASA (Ethernet 0/5). I configured the Catalyst port like so: interface GigabitEthernet1/0/13 description To ASA, 172.18.160.69 switchport access vlan 3 switchport mode access speed 100 duplex full I configured the ASA like so: interface Vlan1 nameif inside security-level 100 ip address 172.18.160.69 255.255.255.0 interface Ethernet0/5 speed 100 duplex full Then I plugged the host into Ethernet 0/4 on the ASA and instructed its owner to make its default gateway 172.18.160.69. I made a NAT rule in the ASA and set up some rules, and it's able to access the Internet without issue. However, I noticed that the Catalyst reports a ton of packets being dropped toward the ASA. Catalyst3750#show interfaces GigabitEthernet 1/0/13 | include counters|drops Last clearing of "show interface" counters 00:28:13 Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 136909347 This is a huge number of drops, since there's not much traffic on this VLAN at all. I tried these things: Make sure speed and duplex agree on both sides (100 Mbps / Full) Set no cdp enable on the Catalyst Gi10/13 Set no keepalive on the Catalyst Gi10/13 Checked for excessive CPU usage on both Checked for excessive traffic on both Am I missing something? Any help would be appreciated.

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• Ubuntu 12.04 froze during update, won't boot

  - by Cichol

  I've recently installed Ubuntu 12.04 on my laptop, and every time i tried to update it, it would freeze for a few seconds, and tell me that the updates could not be downloaded. After many, many tries I managed to get them downloaded, but then in the middle of installing them, it froze. Completely. No mouse movement, no blinking lights, no nothing. After a few hours of letting it sit there, I finally hit the power button to do a hard reset, and now when I select Ubuntu on the boot screen (Dual-boot with Windows 7), I get a blank purple screen, and then nothing. Another freeze. I've tried getting into the console, but no command I input has any visible effect. I have a ton of music stored on the partition it's in, so I'd really rather not have to reinstall. My specs, to the best of my knowledge: Clevo Corp model B7130 (Sager custom) CPU: Intel Core i5 @ 2.53gHz (4 CPUs) Graphics Card: Nvidia GeForce 425m 4096 MB RAM Drivers: Whatever comes with the download of 12.04. As a side-note, I installed Ubuntu via the Windows Installer program (wubi). Does that make a difference?

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• Deploying workstations - best practices?

  - by V. Romanov

  Hi guys I've been researching on the subject of workstation deployment for a while, and found a ton of info and dozens different methods and tools, but no "best practice" method that doesn't lack at least one feature that i consider required for the solution to be perfect. I'm currently interested in windows workstation deployment, but if the tools can be extended to Linux, then it's an added value. I want the deployment tools I use to be able to do the following: hardware independent - I want my image or installation to have a minimum of hardware and driver dependency, so that i can use a single image/package for all workstations easily updatable - I want to be able to update my image as easily as possible without redeploying/rebuilding/reimaging all configurations PXE bootable deployment - I want the tools to be bootable off the network so that I don't need a boot cd/DOK. scriptable for minimum human input - Ideally, the tool should run automatically after being booted and perform a "default" deployment (including partitioning) unless prompted otherwise. i.e - take a pc, hook it up, power on, PXE boot and forget about it until the OS is deployed. I found no single product or environment that does all this. Closest i came to is the windows deployment services/WIM image format. I also checked out numerous imaging and deployment tools including clonezilla, ghost, g4u, wpkg and others, but most of them lack the hardware Independence and updatability features. We currently have a Symantec Ghost server setup that does imaging over the network, but I'm not satisfied with it as it has all the drawbacks i listed above. Do you have suggestions how to optimize the process of workstation deployment? How do you deploy them in your organization? Thanks! Vadim.

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• copying folder and file permissions from one user to another after switching domains [closed]

  - by emptyspaces

  Please excuse the title, this was the best way I could think to describe this scenario without an entire paragraph. I am using C#. Currently I have a file server running windows server 2003 setup on a domain, we will call this oldDomain, and I have about 500 user accounts with various permissions on this server. Because of restrictions out of my control we are abandoning this domain and using another one that is more dominant within the organization, we will call this newDomain. All of the users that have accounts on oldDomain also have accounts on newDomain, but the usernames are completely different and there is no link between the two. What I am hoping to do is generate a list of all user accounts and this appropriate sid's from AD on the oldDomain, I already have this part done using dsquery and dsget. Then I will have someone go through and match all of the accounts from oldDomain to the correct username on newDomain. Ultimately leaving me with a list of sids from oldDomain and the appropriate username from newDomain. Now I am hoping to copy the file and folder permissions from the old user from oldDomain to the new user on newDomain once I join the server to newDomain. Can anyone tell me what the best way to copy permissions from the sid to the user on newDomain? There are a bunch of articles out there about copying permissions from user a to user b but I wanted to check and see what the recommended practice is here since there are a ton of directories.

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• Why do I have 55 local area connections in ipconfig?

  - by RMorrisey

  Windows Vista Home Premium. I should mention that I am having no problem whatever getting an internet connection. When I type "ipconfig" in the console, I get (55!) messages of 3 lines each, listing a ton of disconnected network connections. My PC only has one network card. Each message looks like this: Tunnel adapter Local Area Connection* 55: Media State . . . . . . . . . . . : Media disconnected Connection-specific DNS Suffix . : These don't cause a major problem; they make it a pain, though, to fish upward and find my IP address. How can I get rid of them? Edit: Actually, a few connection numbers are randomly missing from the sequence; so, it's really more like 30 or 40 connection messages, rather than all 55. Not sure why that is, either.

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• Tool to modify properties/metadata of a PDF? i.e. Change "Title", "Author"? Sony Reader showing som

  - by Chris W. Rea

  I own a Sony Reader PRS-600 ebook reader. I bought a ton of Manning Publications ebooks (DRM-free) recently. Many of the books are PDFs since not all the ones I wanted are available in epub format. The problem: Some of the PDF books I purchased have incorrect or missing metadata. Making things worse, the Sony Reader only displays the "Title" from the PDF metadata when displaying book titles in the reader's collection of books! The Reader doesn't display the filename. So, even though I have a PDF informatively named "Windows PowerShell In Action.pdf", it shows up as "untitled" in the Reader. Imagine how useful the Reader's list of book titles becomes when many are just "untitled" or "unnamed document" ! Yes, it is maddening. So – short of expecting the publisher to fix the files or Sony to add a filename-based list instead, I'm looking for a way to fix the PDF metadata. I can view the metadata with Adobe Reader, but it doesn't permit modification of the properties. Leading to: Question: Is there a tool – free, or cheap – and either for PC or Mac, that can modify the properties / metadata of a DRM-free PDF document? I want to correct "Title" and "Author" fields, specifically.

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• What are the attack vectors for passwords sent over http?

  - by KevinM

  I am trying to convince a customer to pay for SSL for a web site that requires login. I want to make sure I correctly understand the major scenarios in which someone can see the passwords that are being sent. My understanding is that at any of the hops along the way can use a packet analyzer to view what is being sent. This seems to require that any hacker (or their malware/botnet) be on the same subnet as any of the hops the packet takes to arrive at its destination. Is that right? Assuming some flavor of this subnet requirement holds true, do I need to worry about all the hops or just the first one? The first one I can obviously worry about if they're on a public Wifi network since anyone could be listening in. Should I be worried about what's going on in subnets that packets will travel across outside this? I don't know a ton about network traffic, but I would assume it's flowing through data centers of major carriers and there's not a lot of juicy attack vectors there, but please correct me if I am wrong. Are there other vectors to be worried about outside of someone listening with a packet analyzer? I am a networking and security noob, so please feel free to set me straight if I am using the wrong terminology in any of this.

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• Trying to understand Wireless N vs Wireless AC

  - by EGHDK

  Whenever a new wireless standard gets approved you expect faster speeds and longer range. From everything that I've read about it, it seems that AC will only transfer over the 5GHz band and up to 3Gbps. Studying the new AC routers on the market, it seems that they will transfer over 5GHz and 2.4GHz. And 5GHz will only transfer at 1.3Gbps. Which isn't what AC is supposed to be. I know there is a difference between what the standard actually says, and what products will actually do, but is there any reason for this? Is there any other main differences between AC and N? I've heard people discussing AC and saying that it's finally "fixing" what N was supposed to fix... what do they mean by that? Any security benefits? I have seen this image online: Will AC really do that? Will that require an AC network card in my laptop for that to actually happen? Lastly, will the router only be able to communicate with AC devices if I have beamforming technology on? I know it's a ton of questions, but most articles online seem to be outdated, and don't provide too much reliability.

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• Suspected brute force attack

  - by HarveySaayman

  Recently I acquired a dedicated server from a local ISP to play around with. As the tags suggest, its a windows server 2008 R2 machine. I've only had it for a few days, and no real traffic is going to it yet. I haven't even deployed a "real" website to it yet. Just a silly page so that I could check IIS, my host headers, DNS records, etc are all configured correctly. While playing around, I noticed a ton of Audit Failure entries in the event viewers security logs. It seems something is trying to access the administrator account, and failing. It smells like a brute force attack to me. My ISP gave me the account details of the administrator account and I used those to RDP into the box, which I've heard is not the securest of situations. I created myself another account and added myself to the administrator group, so im using that account to gain acceess to the machine now. In response to all of this i used http://strongpasswordgenerator.com/ to generate me some 20 character length strong passwords and changed all of my account passwords, even the SQL sa user. I also enabled the auto ban feature of FileZillaServer (my FTP server) My questions: 1) how can i detect this kind of thing better? 2) how can i protect my server from unauthorized access better? PS: I'm a software dev, not a sysadmin so please mind my server security idiot-ness-ness

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• How do you use a Mac without a mouse?

  - by NitroxDM

  So I was using my Mac Mini and decided to set the application button on Logic Click mouse to open Exposé. I had this set up at one time and found it useful. So I open the Exposé control panel and took a look at the triggers for Exposé. There is drop down for a secondary trigger. In that drop down there was a ton of mouse buttons 100+. So I selected #32 just to see what button #32 was on my 5 button mouse. Turns out it's all of them! So no matter what button I press guess what happens... I get Exposé. So using the just the keyboard how do I: Change the Exposé trigger? I can use the keyboard to bring up the control Exposé panel but guess what I can't get anything else to come in to focus. Kill Exposé? Right now I can say is D'oh! Any ideas?

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• Very long (>300s) request processing time on Apache Server serving static content from particular IP

  - by Ron Bieber

  We are running an Apache 2.2 server for a very large web site. Over the past few months we have been having some users reporting slow response times, while others (including our resources, both on the internal network and our home networks) do not see any degradation in performance. After a ton of investigation, we finally found a "Deny from none" statement in our configuration that was causing reverse DNS lookups (which were timing out) that solved the bulk of our issues, but we still have some customers that we are seeing in the Apache logs (using %D in the log format) with request processing times of 300s for images, css, javascript and other static content. We've checked all Deny / Allow statements for reoccurrence of "none", as well as all other things we know of that would cause reverse DNS lookups (such as using "REMOTE_HOST" in rewrite rules, using %a instead of %h in our log format configuration) as well as verified that HostnameLookups is set to "Off". As an aside, we've also validated that reverse DNS lookups for folks having this problem do not time out - so I'm fairly certain DNS is not an issue in this case. I've run out of ideas. Are there any Apache configuration scenarios that someone can point me to that I might be missing that would cause request times for static content to take so long only for certain users? Thank you in advance.

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• Windows Media Center showing Jerky Video on PC

  - by Kris Erickson

  I had to repave my Windows 7 x64 box last week due to a hard drive crash, and for a while everything was running perfectly but now all videos in Windows Media Center are jerky (the sound is fine, they just seem to skip a ton of frames all the time). This is on the local machine, but the same thing happens when I try to stream to my Xbox. The videos all show fine in VLC and Windows Media Player. I guess I must have installed something recently (in the process of getting all the apps I usually have running on my PC) that caused this but for the life of me I can't figure it out. I have updated to the latest video driver (and then rolled back to the standard Windows 7 driver), I have rolled back all the other drivers that I have installed (I believe). I have uninstalled all the codec packs (I also run TVersity, so I hate the TVersity codec pack installed), and I uninstalled TVersity. Nothing seems to help. I have uninstalled windows media center, and reinstalled it from the Programs and Features. I have basically ran out of things to try to fix this, and am almost thinking about reinstalling Windows again. Any suggestions?

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• Designing a software based load balancer

  - by Kishore pandey

  Hello to all Server fault users, I am new to this website but have constantly been using the mother website, stackover flow. Well to begin with, i would like to design a load balancer for the organization i am working for. As i am very new to this whole, idea about load balancing and networks. I am finding it very difficult to start my project. I did a lot of research on already existing load balancer and found some(HAPROXY,NGINX) that could solve my problems, but the point is, I am still in a dilemma if they could answer the following requirements of mine: The client and server in my architecture are distributed. The load balancer should take care of the firewall. LB server should balance the load among all servers present in WWW cloud. The LB server should have some sort of configuration file, with the help of which it is possible to configure the servers. Heart beat: With the help of which it would be possible to check if any server is down, if any server is down the request should be passed to some other server. Various load balancing algorithms of the incoming requests. Easy error handling. It should be fairly possible to prioritize the incoming requests. Is there any already available load balncer solution on the market that could satisfy these requirements? If not is there any base code available with the help of which i could develop my own load balncer. If not where should i start from scratch? I am practically new to everything. Any help from a load balancer expert is very much appreciated. Thanx a ton in advance. Cheers and regards. Kishore

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