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• CentOS 5 - Unable to resolve addresses for NFS mounts during boot

  - by sagi

  I have a few servers running CentOS 5.3, and am trying to get 2 NFS mount-points to mount automatically on boot. I added 2 lines similar to the following to fstab: server1:/path1 /path1 nfs soft 0 0 server2:/path2 /path2 nfs soft 0 0 When I run 'mount -a' manually, the mount points are properly mounted as expected. However, when I reboot the machine, only /path2 is mounted. For /path1 I get the following error: mount: can't get address for server1 It obviously looks like a DNS issue, but the record is properly configured in all the DNS servers and is mounted properly if I re-try the mount after the reboot is completed. I could properly fix this by using IP address instead of hostnames in /etc/fstab or adding server1 to /etc/hosts but I would rather not do that. What might be the reason for failing to resolve this specific address during boot time? Why the problem is only with the 1st mount point and the 2nd is properly mounted despite having identical configuration?

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• Virtual hosting all resolving to the same files

  - by nona urbiz

  I'm trying to set up virtual hosts on my VPS (centos). I set both domain nameservers to fns1.dnspark.net and fns2.dnspark.net and set an A record there for each domain pointing to my IP address 50.16.219.8. Both domains are currently resolving to the first virtual host. What am I doing wrong? Thanks! NameVirtualHost *:80 <VirtualHost *:80> ServerAdmin [email protected] DocumentRoot /var/www/root/dylanstestserver.com ServerName dylanstestserver.com ServerAlias www.dylanstestserver.com ErrorLog logs/dylanstestserver.com-error-log CustomLog logs/dylanstestserver.com-access_log common </VirtualHost> <VirtualHost *:80> ServerAdmin [email protected] DocumentRoot /var/www/root/repthis.info ServerName repthis.info ServerAlias www.repthis.info ErrorLog logs/repthis.info-error-log CustomLog logs/repthis.info-access_log common </VirtualHost>

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• Active Directory Replication across Sites slow or not working

  - by neildeadman

  I've just inherited (isn't it always the way!) a Windows Domain. The domain is spread across 2 sites. Site01 has 3 DCs & Site02 has 2 DCs. If I create a user in either site, the other DCs in that site, immediately replicate and show the new user. The new user is not shown in the other site though. If I manually run the following command, everything syncs and the new user appears: repadmin /syncall issdc01 /APed In the Inter-Site Transports DEFAULTIPSITELINK the replicate every time value is set to 180 minutes. I thought this was the solution, but on another Windows Domain, this is the same, but replication takes place across sites immediately. What can I check to resolve this issue? We are running Windows Server 2008 Results of dcdiag /test:dns show a server that is no longer part of our domain: TEST: Delegations (Del) Error: DNS server: oldserver.win.domain.com IP: [Missing glue A record]

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• MRTG: Switch Port Throughput

  - by amazinghorse24

  I currently have MRTG running in a Debian box. It currently polls a Netgear Switch for the speeds of 7 or so ports and then makes the graphs of them. It currently only records the bits/sec. I would like to set up MRTG to record and display the total amount of data that has gone through the port, not just the speed of it. I am somewhat new to MIBS and SNMP and so I need some help. The switch is a Netgear GS748AT and am not quite sure where to find the MIBS for it, or which MIBS I need to accomplish my task. Any and all help is appreciated!

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• Offset AND incremental backup

  - by Pyrolistical

  I already do backups from my main computer to my server computer using synctoy. But now I also want to do off-site backup. My idea so far: have source hard drive (we'll call S) at home have backup hard drive at work called B have transport hard drive called T connect T at work and record index of files on B take T home and check index of S and note new/changed/deleted files and copy changed files to T take T to work and update S repeat Its basically a sneakernet and using all of the advantages of it. High bandwidth, low latency. Is there some software to do this, or do I have to write it myself?

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• What affects video encoding speeds?

  - by Pig Head

  FRAPs doesn't compress its videos when you record, so the files are enormous. In a long recording you can get up to a few hundred gigabytes. Obviously, usually you would need to convert/compress them. What affects the speed of this? I don't think the RAM does, as when I converted 600 gb my RAM usage only went to 6 gig, but the processor was at 100%, which is surprising as I have a 6 core processor @ 3.46 ghz. Would clock speed or cores help the most?

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• Is it possible for DNS to direct traffic to different ports?

  - by Giffyguy

  Right now I have a DNS CNAME record that makes ftp.angryoctopus.net an alias for the actual FTP URL domain, which is angryoctopus.net:65021 The goal is that a client should be able to type ftp://ftp.angryoctopus.net/ in their browser's address bar, and be directed to Angry Octopus's FTP site on my server - which is hosted at port 65021. Of course the hostname won't resolve. Is it possible to accomplish this type of alias somehow, or am I just beating a dead horse? This reminds me of DynDNS, which I used a few years ago for something-or-other. How does DynDNS spoof ports like that, and can I immitate it to make this work?

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• Address rewriting postfix

  - by ACHAL

  I am using CentOs5 and postfix as an MTA for my server. My situation is as follows:- I have a mail server through which Php applications connect and send mails to the destination addresses. The problem is that the the application servers do not have spf/dkim record set up and my server which actually relays the mails to the network has spf/dkim records. So i want the mail sent by an application having a return address:[email protected] to change to [email protected]. r09.4reseller.org is hostname of my mail server. This i have done by generic mapping in postfix: smtp_generic_maps = hash:/etc/postfix/generic In /etc/postfix/generic: [email protected] [email protected] This is working as return address is changed to [email protected] when mail is sent. But when i try to sent mail on [email protected] I don't get mail on [email protected]. I have tried virtual mapping in postfix i.e by the file /etc/postfix/virtual but its not helping.

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• SQL Server plus small files

  - by user1467163

  I have a MSSQL server, 3 volumes, that runs some processes that seem to take way too long. One of these processes reads in a zip file, then writes to a database based on what's in the zip file.... for each record. I have 2 volumes in use and am creating the third- so I am trying to plan how to do this. OS has to remain on vol. 1. The TLogs should probably go on the new volume and the mdf's on the existing vol.2.. Do I put the file store on the volume with the MDF's so they don't interfere with the TLog writes, or with the TLogs so they don't interfere with the TLog flush to the MDFs? I know it's best to have more servers / volumes but I have to make do with whats on hand for now. I appreciate any suggestions.

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• Want to SASL/TLS authentication

  - by Naval

  I want to send mail from remote client from my server(centos 5 and 64 bit) for this i need to sasl auth but i have no idea about it what changes i have to make in my server and client here I want to make things more clear my server's hostname/Ip is = test02.s80.in/176.67.172.209 now i want to authenticat remote client vps2.smail.info and vps1.smail.info to deliver mail .. so plz help me if any systematic way to do sasl/tls authentication for these clients... i am using DNS load-balancing(round-robin) mx record lookup technique for load balancing..

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• Uninstalled Ubuntu, no GRLDR?

  - by user32965

  So I'm a big fat idiot. I installed Ubuntu 11.04 on my school's laptop, and here's come the time that I have to turn it back in. I wrote GRUB to the Master Boot Record, thinking it wasn't going to be permanent. So, fast forward to yesterday. I decided to hell with this, and popped in my Windows 7 CD, deleted the whole partition, formatted to NTFS, and installed Windows 7 on it. I'm surfing the web and my computer overheats [totally typical] I boot up, and get this: Try (hd0,0): FAT32: No GRLDR Try (hd0,1): invalid or null Try (hd0,2): invalid or null Try (hd0,3): invalid or null Try (hd1,0): NTFS5: No grldr Try (hd1,1): invalid or null Try (hd1,2): invalid or null Try (hd1,3): invalid or null Cannot find GRLDR. Press space bar to hold the screen, any other key to boot previous MBR... Timeout: 5 The timeout part just counts down to 0 from 5. I need to turn in this thing before tomorrow, please please please can someone help me out?

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• Tool to make screenshot-based "screencast"

  - by liori

  Hello, I'd like to make a simple animation: some screenshots with added text. Something like screencast, but simpler, no audio... and hopefully very quick to produce--this is my main requirement. Googling for "screencasts" gives me full-blown tools to record video and audio, and I don't need them. I can make screenshots manually, then add text in GIMP... but maybe there is something easier, quicker? Very preferably something that works on Linux.

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• Subdomain only accessible from one computer

  - by Edan Maor

  I recently added a wildcard A record to my domain (*.root.com), mapping it to a certain elastic ip on AWS. I've configured apache to redirect all references to something.root.com to root.com, except for one specific "dev" subdomain, which is hosting its own site (a Django app, specifically). The Problem: This setup works perfectly for me on my computer. But on other computers around the office, it doesn't seem to work. Specifically, trying to visit dev.root.com gives an "unable to find server" error. Pinging dev.root.com gives a "cannot resolve hostname" error. The weird thing: pinging any other subdomain of root.com does work, from all machines. I would think this was all due to DNS propagation, except all the computers are behind the same office router, so how could that be the case? Any ideas?

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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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• have list of emails to be deleted from sheet A col D [on hold]

  - by Peta

  Thank you for your comments guys & now that CharlieRB has suggested "Match entire cell contents" I'll give it a better go. No I do not expect people to do my work for me & I'm sorry if it came over that way - just didn't know where to start. Would love some help please, I've limited VBA & function knowledge & I'm not sure where to start. If someone can point me in the right direction it would be appreciated. I have a list of email addresses on sheet "B" col A (but I could put them on sheet A if it would make it easier / faster) that I want deleted from sheet "A" col D (may be 2 or more occurences of the same email). I can't just record a find & delete macro and edit because for example [email protected] will also pick up [email protected] which I may not want deleted. thanks very much Peta

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• Best Configuration For Youtube HD 720p

  - by Eray Alakese

  Hello, I'm recording a screencast with CamStudio . My computer's screen resolution is 1280*800 , so video's resolution is 1280*800, too. I'm using Microsoft Video 1 codec when recording. I was record 9 minutes video and this video's size is 214 MB . I will upload this video to Youtube. I'm coding a web site at the video, because of this, video must be quality (720p) . I want to reduce file's size, before upload . I'm using Total Video Converter . But when i convert to FLV , video's size increase to 250MB :) I don't know, how can i configure this setting and which file type should i choose.

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• Best Configuration For Youtube HD 720p

  - by Eray Alakese

  Hello, I'm recording a screencast with CamStudio (http://camstudio.org/) . My computer's screen resolution is 1280*800 , so video's resolution is 1280*800, too. I'm using Microsoft Video 1 codec when recording. I was record 9 minutes video and this video's size is 214 MB . I will upload this video to Youtube. I'm coding a web site at the video, because of this, video must be quality (720p) . I want to reduce file's size, before upload . I'm using Total Video Converter (http://www.effectmatrix.com/total-video-converter/) . But when i convert to FLV , video's size increase to 250MB :) I don't know, how can i configure this setting and which file type should i choose. (screenshot here : http://i.imgur.com/Se0EP.jpg )

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• View Public Key in Domain Key for a Domain

  - by Josh

  Using Jeff's blog post I'm creating domain keys for my account. I wanted to verify the setup using Get or Host command with Bind for Windows but I'm lost one of the commands. I can see view the _domainkey. txt file with this command: host -t txt _domainkey.stackoverflow.com but I'm at a loss at how I'd find the selector record. Jeff points out it can be anything before the before the period in "._domainkey.domain.com" but how would I list all records if I didn't know the exact query name? Is there a wildcard I could use to view all TXT or all records under this section?

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• Serve my website from different server during downtime

  - by nfedyashev.mp

  I have a VPS server running in the cloud. Fully automated server image upgrade/downgrade(by RAM/HDD plans). The problem is that server upgrade/downgrade takes time and involves total unavailability during this period(up to 30 minutes). Goal: during this downtime server my website(http://mydomain.here) from different server with some message like "Under construction". How can I do this? -- mydomain.here is hosted on godaddy and uses its DNS(If I call it right). It's pointing with A-record to my VPS's IP address now. Change in these DNS settings will take more than 30minutes, so it's not an option. How can I find mode "dynamic" DNS? What should I learn?

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• Openfire Installation Issue - Can't Login to admin panel

  - by Lobe

  I am trying to get Openfire to install on an Ubuntu virtual machine, however upon completing the web based installer, I am unable to login to the admin panel. So far I: downloaded Debian installer Installed using stock options Added database and built the structure using supplied SQL file Completed web based installer I am now trying to login using username: admin and my password, however I constantly get a wrong username/password error. There is a record generated in the MySQL database showing the admin user with an encrypted password, and changing to an unencoded password doesn't work. What is the problem here?

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• Camtasia on remote computer?

  - by daughtkom

  I have a need to use one laptop for a live presentation (with projector, etc.), but record that presentation on another laptop -- similar to what I can do with Camtasia, only with the recording happening on another laptop. Is this possible? What do I need to do this? Some VGA device that goes between the presenting machine and the projector? Some USB device? My ideal requirements: The machines must be "standard" laptops (so I can't just add a new card to a desktop, etc.). I prefer a hardware solution, but cannot involve studio type equipment. I'd prefer not to install Camtasia (or similar) on the presenting machine for two reasons: licensing issues performance issues (sometimes the presentations are machine intensive and I don't want the recording software to interfere with the presentation) I'd appreciate any tips. Thanks.

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• Dealing with array of IntPtr

  - by Padu Merloti

  I think I'm close and I bet the solution is something stupid. I have a C++ native DLL where I define the following function: DllExport bool __stdcall Open(const char* filePath, int *numFrames, void** data); { //creates the list of arrays here... don't worry, lifetime is managed somewhere else //foreach item of the list: { BYTE* pByte = GetArray(i); //here's where my problem lives *(data + i * sizeofarray) = pByte; } *numFrames = total number of items in the list return true; } Basically, given a file path, this function creates a list of byte arrays (BYTE*) and should return a list of pointers via the data param. Each pointing to a different byte array. I want to pass an array of IntPtr from C# and be able to marshal each individual array in order. Here's the code I'm using: [DllImport("mydll.dll",EntryPoint = "Open")] private static extern bool MyOpen( string filePath, out int numFrames, out IntPtr[] ptr); internal static bool Open( string filePath, out int numFrames, out Bitmap[] images) { var ptrList = new IntPtr[512]; MyOpen(filePath, out numFrames, out ptrList); images = new Bitmap[numFrames]; var len = 100; //for sake of simplicity for (int i=0; i<numFrames;i++) { var buffer = new byte[len]; Marshal.Copy(ptrList[i], buffer, 0, len); images[i] = CreateBitmapFromBuffer(buffer, height, width); } return true; } Problem is in my C++ code. When I assign *(data + i * sizeofarray) = pByte; it corrupts the array of pointers... what am I doing wrong?

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• Configure Git to use Beyond Compare for image diff

  - by Barney

  Because we work with a number of sprites, the kind of specialised diff views provided by Beyond Compare would be ideal to see which one of 2 versions I'm after when conflicts arise. I've already configured Git to use Beyond Compare as my primary diff and merge tool as described in their integration guide — it specifically goes into how to configure TortoiseSVN to use it for images, and I've found these articles talking about .gitattributes in general and how to script interactions from a *nix shell — but it's not obvious to me how I can use the advice provided by these guides to make a simple change that would say "use the default diff & merge bindings for files determined to be images, too". For the record, I'm doing all this on Windows :P

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• Recording with audio input MacBook Air

  - by Milla Well

  I'm trying to record analogue stereo sound with my MacBookAir. The external mic is plugged to the headphones jack, but it is not being shown in the System Preferences. I did a little bit of research, and there is some rumor, that the headphone jack only supports digital-in for mics. Is there a built-in way to use the analogue stereo sound without purchasing an external converter or a new mic? With my old MacBook 2,1 it was usual for me to do this, but with my new MacBook Air 4,1 it seems to be a tough task.

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• Video screen recording + add text (subtitle), export as .flv. What programs?

  - by RasmusWriedtLarsen

  I have to record a video to showcase a tool I've made. It's going to include my talking, but I also want some overlay text (subtitles) for people who doesn't have sound. I'm looking for a program that will let me add a text overlay (as subtitle) for my video, and if possible, export it as .flv . I've tried this so far: Used CamStudio for recording, using their lossless format. Converted the .avi file to a .flv using Any Video Converter (free version) I've been having some trouble with the output of CamStudio, some programs can't play the file right, it skips forward and backward. (VLC, Adobe Media Encoder CS4) So I'm looking for a program that accepts videos from CamStudio*, can add text to my video, and hopefully export as flv. *(If that's not possible I'm open for other recording programs). I'd like to ONLY use free programs, and I'm on Windows XP. Looking forward to your help :)

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