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• CDPATH in windows command prompt?

  - by barlop

  The accepted answer of this question Fast Ways of Cd'ing on *nix? mentions bash having CDPATH is there an equivalent in windows? so from any directory e.g. c:\windows I could do c:\windowscd compbar* and it'd take me to m:\a\b\c\d\e\compbar what if there are many compbar directories? well, the CDPATH solution is one solution, I suppose you order them it'd search through the CDPATH environment variable and choose the first. I'd like that for windows.

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• teamviewer display is slow to refresh

  - by brunoais

  I'm using teamviewer from time to time to connect my portable computer with my desktop computer when I need to check on something (personal use). One of the main things I've been noticing is that it is quite slow transfering the screen updates that keep happening. This happens more frequently when I'm moving full windows or when I open a window or when watching a small movie clip. I've tested the lowest maximum p2p speed I ever got in the last week between both and it is the desktop's upload speed of 6MB/s with the ping of 40ms (usually ~15 ms). With this I was expecting to have very sharp image and fast transfer speeds which is not what is happening. Just to clarify, both computer's individual core's CPU is not reaching its peak (25%) while teamviewer is active, so the encryption and decryption is not the cause. Why my connection between both computers so slow?

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• Need an idiot-proof picture resizing program for Windblows.

  - by marcusw

  My friend needs to resize some pictures as part of a web publishing job, but he is rather clueless when it comes to computers. I am in charge of teaching him how to do this, but only have Linux (albeit with Wine installed) at my disposal for testing. Could you guys recommend a fast, easy, batch-capable, and hopefully open-source program that will resize pictures to the resolution he wants? It doesn't have to be anything fancy, but it needs to be quick and easy to use. Thanks!

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• Objective-C: when does an assigned object get deallocated

  - by Stefan Klumpp

  If I have a instance method and within this method I do something like this: NSString *peopleString = [peopleList componentsJoinedByString: @", "]; ... UILabel *likeLabel = [[UILabel alloc] initWithFrame:CGRectMake(16.0+6.0f, 4.0f, 252.0f, 12.0f)]; [likeLabel setText:peopleString]; [likeLabel setFont:[UIFont fontWithName:@"Arial" size:12]]; [likeRow addSubview:likeLabel]; [likeLabel release]; The componentsJoinedByString doesn't contain a new, copy or alloc, thus I don't have to release it. What I'm wondering though is, when my peopleString gets deallocated. Might it happen to early? Meaning, before I can set the text in my label. Should I better use a [[NSString alloc] initWithString:[peopleList componentsJoinedByString: @", "]]; and release it at the end of this method?

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• Prevent auto forwarding NDR loops

  - by DemonWareXT

  a week ago we experienced a really sweet problem at a client of ours. They are a school with around 1200 users, and everyone of them has auto forwarding for all mail activated. We use Exchange 2010 Now a few of the users where able to make NDR loops by adding 2 different, wrong, destinations. We had around 80k mails sent within a few hours. Not very practical. My question is, does anyone know a good way to prevent something like this. I have found 2 ways, which both fail for their own reasons We could manage the auto forwarding on the exchange host itself, which should prevent this looping problem someone said. But 1200 Users, not on my watch. There is a Powershell script out in the wild which should work against that, but my employers want something more "professional" Thank you very much for your support Linus

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• Printing documents on HP printer very slow

  - by maxim

  I have a strange problem with HP drivers. I have configured a HP printer 2025dn with LAN connection, on 3 pc, using the cd rom of HP driver. All works well, but sometimes for certain documents the time for printing is very slow and long. I observe during this situation, in task manager, a process called rundll32.exe loads CPU at 100%. If I kill that process the printer starts printing fast the document in the queue. I wondering the reason of this strange behaviour.

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• Domain controller failed to restore using windows backup tools

  - by Peilin

  Domain controller failed to restore using windows backup tools One Issue: One 08 R2 domain controller with fully daily backup(only one controller in this company) is out of services due to hardware issue. The below two methods i tried to recover to the new purchasing server,but it is fail. 1)First Method: Using the windows 2008 R2 CD to boot and carry out recover from backup. Everything is OK, but after reboot it will come out blue screen and restart again. 2)Second Method: a)Install the OS in this new server b) Reboot the server to DSRM. c)Using the Windows Backup Tools to restore the system states only After reboot, it will come out the blue screen error and restart again. I know this is may be the different hardware issue, but how to resolve? Or can we only restore the AD services not whole system status? Any suggestion?

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• How does Apache handle port forwarding?

  - by vfclists

  I setup a localhost portforwarding configuration in the coLinux .conf file, forwarding port 8090 to port 80 in the VM. When http://localhost:8090 is entered in the browser, I get the correct response from nginx, but with Apache the response get the error /htdocs not found in the log. However if I do a local port forwarding from 8090 to port 80 via SSH Apache responds fine. Is there something about the way Apache handles the port redirection that causes it to fail? PS, For those unfamiliar with coLinux it allows localhost connections to get to the VM by forwarding localhost ports on the Windows host to ports on the VM, as the 10.x.x.x IP it not accessible from the Windows host.

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• MySQL Cluster Failover doesn't work

  - by Lukasz

  I have two servers, where First server 10.100.15.150: 1. one mgm server 2. one ndbd 3. one mysql api Second server 10.100.15.160: 1. one ndbd 2. one mysql api When i start all 'parts' of cluster it looks : Cluster Configuration [ndbd(NDB)] 2 node(s) id=21 @10.100.15.150 (mysql-5.1.56 ndb-7.1.17, Nodegroup: 0) id=22 @10.100.15.160 (mysql-5.1.56 ndb-7.1.17, Nodegroup: 0, Master) [ndb_mgmd(MGM)] 1 node(s) id=3 @10.100.15.150 (mysql-5.1.56 ndb-7.1.17) [mysqld(API)] 2 node(s) id=11 @10.100.15.150 (mysql-5.1.56 ndb-7.1.17) id=12 @10.100.15.160 (mysql-5.1.56 ndb-7.1.17) When i shutdown first machine - 10.100.15.150, on second the nbdb process also has been shutdown so i cannot use this data node and cluster fail ... How i must configure this cluster to get FailOver working ? Thx

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• Need hard disk recommendation for linux home server.

  - by neotracker

  Hello, I'm planing to build a little linux homeserver. It will mainly be used for storage and maybe as an media pc. I plan to build a software raid5 with 4 1.5TB or 2TB hard drives. I already decided to use the Western Digital Caviar Green 1.5 TB drive, but then I read about some problems with the WD green series about many drives failing and that they are not recommended for raid anyway. Of course, I couldn't find much facts on the issues so I thought I just ask here ;-) What hard drives would you recommended for a software raid5 setup? As I only need it for storage, the whole thing doesn't have to be too fast. So I prefer a cheap price and silence to great performance.

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• How to make a quiet laptop?

  - by psihodelia

  Most modern laptops have very noisy fans. I am looking for a quiet laptop or a small stationary computer which has all its hardware built in a display. Most tasks will be PDF/docs processing, real-time audio processing, web-surfing and Skype video chats. Certainly, there is no any fan-less model today; but maybe some of the existed laptops do not switch on their fans so often or implement different solutions? For example, an iPad has no fan at all and it is fast enough for my needs, but it has no normal operating system, so I can't use it for anything but audio chats and web-surfing. Or maybe I can buy a laptop and tweak it to make it absolutely noiseless? Can you recommend any solution please?

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• My Network adapter "D-Link DWA-547" is causing windows 7 to freeze up.

  - by Anders

  Any audio playing, and sometimes the program i am using is constantly stuttering and freezing up. I have narrowed the offending hardware down to my: D-Link DWA-547 RangeBooster N650 Desktop Adapter If i disable it in the device manager everything runs fine and smooth. The card works, and gives me super fast internet. But the rest of the system hangs. I have tried installing the card with the drivers from the cd that came with it, i also tried the lates beta drivers from the d-link webpage, but the problem persists. What do i do? I am running windows 7 x64 on a asus p5b motherboard with 2 intel processors.

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• Transferring NS records to a new server

  - by lanemiller

  I feel like that was NOT worded well, but here is my current predicament. I recently had a GoDaddy dedicated server, and decided after their customer support failed to do anything but disappoint, to switch to Rackspace. We have 2 ns records that point to our godaddy server, and we have a few sites left on the server, that rely on it for their DNS zones, and the owners of the domains fail to respond to us. So, the question is, if I need to transfer the sites off of the OLD godaddy NS, can I point the A records from my ns1.domain.com and ns2.domain.com to match up with IP addresses of the Rackspace nameservers? OR, do I cname my NS records to match the rackspace ones? I DO know that this isn't advised, either method, but I need to get these sites moved before Godaddy tries charging another $2k for the server.

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• Configuring sendmail to use one outbound MTA exclusively

  - by Charlie Martin

  I have a sendmail problem, and I'm anything but a sendmail guru -- I could use some help. My problem is that I have a system intended to be more or less an "appliance" -- it's not intended to have an admin. Because of this, it needs to be able to "call home" by sending email. As we have configured it, this works fine -- using sendmail, it finds the appropriate relay by looking up an MX record and everything works fine. Now, however, because of security concerns, we want to limit it to using exactly one relay, so for example relay.corp.example.com. Should the user configure it to use, say, fubar.example.com, the mail sending should fail or be deferred. I thought that by configuring sendmail with a /etc/mail/server.switch file containing hosts files without dns, I'd get that effect. This doesn't work -- instead, if it gets mail addressed to [email protected], it tries to talk directly to example.com, and ignores the configured server. Any ideas?

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• SAN/NAS with high availability?

  - by netvope

  I have two servers that I plan to use for storage. Each of them has a few SATA disks directly attached. I want the storage to be available even if one of the storage servers is down (preferably the clients wouldn't even notice that the fail-over, although I'm not sure if this is possible). The clients may access the storage via NFS and samba, but this is not a must; I could use something else if needed. I found this guide, Installing and Configuring Openfiler with DRBD and Heartbeat, which apparently does the thing I want. It relies on three components, Openfiler, DRBD, and Heartbeat, and all three of them need to be configured separately. I'm wondering are there simpler solutions? Is using DRBD+Heartbeat the best practice for a situation like mine? I'm also interested to know if there are alternatives that don't depend on DRBD.

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• How dow I remove 1.000.000 WebsiteCache directories?

  - by harper

  I found that in a WebsiteCache directory more than 1.000.000 subdirectories has been created. I want to remove all these directories. My first approach was to use the command line tool: cd WebsiteCache rmdir /Q /S . This will remove all subdirectories except WebsiteCache itself, since it is the current working directory. I noticed after two hours that the directoriws starting with A-H have been removed. Why does rmdir removes the directories in alphabetical order? It must take additional effort to do this ordered. What is a fast way to deleted such an amount of directories?

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• MVC 2 Ajax.Beginform passes returned Html + Json to javascript function

  - by Joe

  Hi, I have a small partial Create Person form in a page above a table of results. I want to be able to post the form to the server, which I can do no problem with ajax.Beginform. <% using (Ajax.BeginForm("Create", new AjaxOptions { OnComplete = "ProcessResponse" })) {%> <fieldset> <legend>Fields</legend> <div class="editor-label"> <%=Html.LabelFor(model => model.FirstName)%> </div> <div class="editor-field"> <%=Html.TextBoxFor(model => model.FirstName)%> <%=Html.ValidationMessageFor(model => model.FirstName)%> </div> <div class="editor-label"> <%=Html.LabelFor(model => model.LastName)%> </div> <div class="editor-field"> <%=Html.TextBoxFor(model => model.LastName)%> <%=Html.ValidationMessageFor(model => model.LastName)%> </div> <p> <input type="submit" /> </p> </fieldset> <% } %> Then in my controller I want to be able to post back a partial which is just a table row if the create is successful and append it to the table, which I can do easily with jquery. $('#personTable tr:last').after(data); However, if server validation fails I want to pass back my partial create person form with the validation errors and replace the existing Create Person form. I have tried returning a Json array Controller: return Json(new { Success = true, Html= this.RenderViewToString("PersonSubform",person) }); Javascript: var json_data = response.get_response().get_object(); with a pass/fail flag and the partial rendered as a string using the solition below but that doesnt render the mvc validation controls when the form fails. SO RenderPartialToString So, is there any way I can hand my javascript the out of the box PartialView("PersonForm") as its returned from my ajax.form? Can I pass some addition info as a Json array so I can tell if its pass or fail and maybe add a message? UPDATE I can now pass the HTML of a PartialView to my javascript but I need to pass some additional data pairs like ServerValidation : true/false and ActionMessage : "you have just created a Person Bill". Ideally I would pass a Json array rather than hidden fields in my partial. function ProcessResponse(response) { var html = response.get_data(); $("#campaignSubform").html(html); } Many thanks in advance

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• Why hasn't functional programming taken over yet?

  - by pankrax

  I've read some texts about declarative/functional programming (languages), tried out Haskell as well as written one myself. From what I've seen, functional programming has several advantages over the classical imperative style: Stateless programs; No side effects Concurrency; Plays extremely nice with the rising multi-core technology Programs are usually shorter and in some cases easier to read Productivity goes up (example: Erlang) Imperative programming is a very old paradigm (as far as I know) and possibly not suitable for the 21st century Why are companies using or programs written in functional languages still so "rare"? Why, when looking at the advantages of functional programming, are we still using imperative programming languages? Maybe it was too early for it in 1990, but today?

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• Symlink across local volumes in webroot?

  - by geerlingguy

  I am looking for a good short-term solution to storage space concerns on my website. Currently, I have all uploaded files (flash video, images, etc.) inside the 'files' directory in my web root (/home/account/public_html/files). That directory is located on my high-speed main hard drive (a 15k SCSI drive). I have another drive with much more capacity, but spinning at 10k rpm (so still fast, but not as good for random reads/writes as the main drive. The entire drive is mounted at /backup Right now I'm just using it as a backup volume. I would like to create a symlink from my /home/account/public_html/files folder to /backup/files, and have all files reside on the second drive. However, if someone accesses a file at http://www.example.com/files/filename.jpg, would it still work if I symlinked to the second drive? (Basically, would Apache/PHP automatically know to follow the symlink for that directory?).

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• How to increase Remote Desktop resolution?

  - by BugAlert

  I'm using Windows 7 on a PC and connect to it via Remote Desktop Connection for Mac by MS, using a Mac. On the Mac, I have a 27" Display with 2560 x 1440 px resolution. The PC has a high performance graphics card (one of those that needs an additional power supply). Both machines are connected via network cable to a router. So network should be insanely fast. However, the max resolution I can get is 1400 x 1050. The PC just has a old and bad 21" monitor connected to it. How can I increase the resolution to 2560 x 1440 to work fullscreen with the Apple LED Cinema Display via Remote Desktop? Maybe I shouldn't even ask, because I already experience some lag at the low resolution of 1400 x 1050. But I guess this can be resolved as well?

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• Understanding connection tracking in iptables

  - by Matt

  I'm after some clarification of the state/connection tracking in iptables. What is the difference between these rules? iptables -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT iptables -A FORWARD -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT Is connection tracking turned on when a packet is first matched containing -m state --state BLA , or is connection tracking always on? Can/Should connection state be used for fast matching like below? e.g. suppose this is some sort of router/firewall (no nat). # Default DROP policy iptables -P INPUT DROP iptables -P OUTPUT DROP iptables -P FORWARD DROP # Drop invalid iptables -A FORWARD -m state --state INVALID -j DROP # Accept established,related connections iptables -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT # Allow ssh through, track connection iptables -A FORWARD -p tcp --syn --dport 22 -m state --state NEW -j ACCEPT

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• Why doesn't Ghost 2003 offer to fill the destination drive?

  - by Neil

  Because it is dangerously low on disk space, I want to upgrade an SBS 2003 server by replacing its existing 72GB drive with a 364GB drive. When I tried to use Norton Ghost 2003 to clone the disk it didn't suggest that I use the entire new drive. I'm worried that I caused the process to fail by overriding its decision - although the cloned drive boots in Safe Mode, if I try booting it normally then none of the SQL Express instances start and something causes the server to reboot before even the Ctrl+Alt+Del screen appears. Does Ghost 2003 know something that I don't? Or should I be using some other software?

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• Getting More Performance out of a MacBook Pro

  - by 5arx

  So I've got a mid-2009 MacBook Pro 13". Integrated GPU so not a games machine but fast enough for doing .Net development in VMs. I love the little thing and wanted to give it a Christmas present so thought I'd mod it up a bit and give it a boost. I'm thinking of swapping out the stock 5400rpm HD with a faster hybrid drive (has 4GB RAM and spins at 7200rpm) but was wondering if any of you had tried or knew of anything else I could change/upgrade/mod to squeeze more out of my laptop. Before you answer though, please be aware that I'm not sure I can run to putting in the 8GB of RAM Apple have suggested :-( Thanks in advance.

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• DNS Resolver Speed Techniques

  - by Rob Olmos

  I recently received a reply to my concerns about some DNS servers being slower than others despite all servers being anycast: In practice, most resolvers won't be impacted by the slower paths to some of the name servers in the set. Most resolvers employ various techniques to provide fast lookups, such as preferring name servers that were previously seen to be faster, sending simultaneous queries to multiple name servers, or pre-fetching queries before the TTL has expired. I was not aware that resolvers used these techniques and I was unsuccessful at searching for more info about this. Are there any names for these techniques? Which resolvers employ which of these techniques?

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• Would hybrid drive work after SSD failure

  - by lulalala

  Hybrid hard drive combines SSD with traditional hard drives. I know that SSD can fail much often than traditional hard drives. So I want to ask that, when the SSD part of the hybrid drive fails, would I still be able to use the traditional hard drive? If it won't work like that, then I will consider add-in SATA cards instead, as it delegates risk much better. EDIT: I guess it differs from model to model, so if yes what models would work. (I am evaluating Seagate DX for now)

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