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• how to stop deferred emails

  - by Will K

  I have a postfix mail gateway. At the same time, every other host is set to use this gateway as the relay. We have some automated outgoing emails sent from some hosts. I believe the gateway trys to send a deferred status back to the system started this. But that system is a null client, which sends but not receive any email Is there anyway to stop sending the deferred status? e.g. postfix/smtp[35725]: 2F6A155C256: to=, relay=none, delay=260862, delays=260862/0.01/0/0, dsn=4.4.1, status=deferred (connect to orange.mydom.com[192.168.1.5]:25: Connection refused) Thanks

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• Synchronize SQL with information from Active Directory

  - by Priokuli

  Hello, I would like to pass information from Active Directory to a Microsoft SQL Server database any time a change is made in Active Directory. In this way the SQL will always have a reliable copy of the AD. Well, i have been reading some post that deal with similar questions, but I can't find the solution. In this post, for example: Synchronization between c# app and Active directory , a user said: '...Then let AD synchronize with SQL.' That sounds good for me, but how can I do that? Thanks in advance.

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• Is there Linux Live USB that works with Snow Leopard macbook pro from 2010 april

  - by rofrol

  Hello, I was searching for a long time a Linux Live USB that I can boot my macbook pro from. Is there such distro so I can install it on Snow Leopard or Windows 7? UPDATE I've found this: "isohybrid" CD images (..) are special in that as well as the normal CD-based ISO9660 filesystem they also contain a valid-looking DOS-style partition table. Thus, if you simply copy one of these images raw to a USB stick a normal PC BIOS will boot the image directly. (...) Finally: I'd like to add support into xorriso for creating the nasty HFS hybrid images that are needed for booting Macs. The code that does this in cdrkit is probably some of the worst that I've ever worked with, and I'd like to get away from it. If only Apple hadn't stupidly built their proprietary platform around this shit and had used open standards instead Source

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• Boot.ini on Windows Server 2003 R2

  - by Jason H.

  I have a Windows Server 2003 R2 with 48 GB of RAM; server has been running strong for quite some time. Recently our boot.ini was modified causing issues, most likely by our remote administrators. Now the server is only showing 14 GB of RAM. This has caused major performance issues for our end users. Our remote administrators have stated "we don't change the boot.ini settings(switches)". However, I know for a fact that all of the local administrators have not modified the switches (due to lack of permissions). The real question.. Is it possible to "audit" who has modified the boot.ini? If thats not possible, can the boot.ini be set via startup? Any help would be greatly appreciated. This is an ongoing issue that I would love to resolve.

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• Man pages in Linux

  - by Ayos

  I don't seem to have all the man pages that I need. For example, my college computers (running Fedora 14) have man pages for ASCII, all the standard C libraries (stdlib.h, stdio.h) and so on and so forth. I wish to "install" these pages, after looking up on the Internet I couldn't really find anything that made sense. How can I get, say, the man-page of ASCII (I know it's not really a command or a daemon or anything like that, but typing man ASCII on the college computer gets me a page with the ASCII value table + a little more information). I don't want to keep using the Internet for looking up man pages every time I need to look up a function, function prototype or the ASCII table or something like that.

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• Debian doesn't boot after removing secondary hard drive

  - by Daveel

  In the beginning I had Debian 6 running on one hard drive (/dev/sda1). Then I decided to keep all my stuff(pics, videos, etc..) in another slave hard drive (/dev/sdb1). So sda1 has Debian OS sdb1 doesn't contain any OS files I have made it to mount automatically by adding a row in /etc/fstab (UUID and directory to mount to) Time have passed and when I tried to change that secondary hard drive with another hard drive with bigger capacity, for some reason Debian won't boot (just itself sda1) after removing secondary hard drive (sdb1) But if I plug sdb1 back, it boots just fine. I tried to comment line out from /etc/fstab, so it doesn't mount And also did update-grub after umount /dev/sdb1 What's the right way to remove hard drive secondary hard drive?

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• What is the 'cacert.pem' and for what to use that?

  - by user65567

  I am developing a web application on localhost with domains and sub-domains and I would like to use a HTTPS connection. On my Mac OS, in order to enable SSL, I need to set Apache correctly, so I followed some guide to accomplish part of that. Now it is time to choose a certificate in order to test HTTPS requests. I seen the cacert.pem, but I don't know how to use that and for what it is used (can you explain to me some about its usage?)... So, is it possible to use the cacert.pem (see the link) for all my domains and subdomains (maybe, as a wildcard certificate) on localhost? If so, how to do that? What certificate I have to take and use? If no, what I need to do in order to use a wildcard certificate for all my domains and subdomains on localhost? Of course those certificates must be accepted by browsers and working for HTTPS connection between my domains.

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• LVM vs RAID0 vs RAID "linear" - Combine 2 disks as one, data recovery?

  - by leto

  Hi there, given two 2TB USB external disks that have to be combined to one 4TB volume and formatted with one big Filesystem (XFS), I have a small question to ask. Does LVM provide better Data recovery, should one disk be unplugged/damaged by being able to recover the data of the still working disk or is everything lost? I would appreciate a solution where only the data of one disk is lost and I can recover the content of the other with the usual filesystem/lvm/raid tools. Is that possible with LVM or RAID "linear"? This is for storing unimportant files that can be retrieved from backup, but I want to save time :) Thank you in advance

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• Too Many ESTABLISHED connection from a single IP address in Apache

  - by ananthan

  netstat -ntp |grep 80 shows too many ESTABLISHED connection from single IP address. Around 300 of them and it is not an attack and user is using a 2G connection to access Apache. This is the case with other 2G connections also. As a result of this Apache is running out of children. Earlier it was showing too many close_wait and after enabling tcp_tw_reuse and tcp_tw-recycle there is not much close_wait but the number of ESTABLISHED connections increased. We are using Ubuntu 11.04 having 48 GB ram keepalive On keepalive timeout 10 max clients 800 max-request-perchild 4000 timeout 300 I have set syn_ack to 1 and syn_retries to 2. On wifi there is no such issue. Connections are closing properly, but with 2G connections Apache is running out of children and too many ESTABLISHED connection. also i have tried setting timeout from default 300 to 30,but since our project is image hosting for mobile phones,clients couldn't upload images properly as they are getting frequent time out.Also there were a lot of 408 messages so changed it to the default 300

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• Dns.GetHostEntry is not giving me a good IP to pass to IPEndPoint function in my domain

  - by Beach Miles

  My c# code from my asynchronous socket client to get the address of my socket server. string testServerIP = "192.168.0.1"; IPHostEntry ipHostInfo = Dns.GetHostEntry(testServerIP); //time server address IPAddress ipAddress = ipHostInfo.AddressList[0]; IPEndPoint remoteEP = new IPEndPoint(ipAddress, port); I get the following error message from the above code. CheckServerReconnect:Cant connect to 192.168.0.1 The requested name is valid and was found in the database, but it does not have the correct associated data being resolved for

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• Outlook 2010 and Exchange 2003

  - by user69644

  We've had some issues with a user who has upgraded to Outlook 2010 and attached to an internal Exchange 2003 SP2 server. They get errors more or less saying cannot send, contact your administrator and then a long error string whenever attempting to send. They receive just fine - but can't get any outbound flow. We recreate the users profile on another Windows 7 machine with Outlook 2010 and it worked fine. Concerned this might be an issue that rears it's ugly head later or at some random time. We noted some KB docs about the issue recommending registry changes - we've reviewed and ensure these changes were made and still have the issue on the one machine. Any thoughts?

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• How to force "Windows Explorer" to open new folders in the same window

  - by yoshiserry

  I have been searching for an answer to this question for a very long time. I have checked the "open folders in the same window" radio button in the general tab of folder options. I have also been told to uncheck the launch as seperate processes button in the view tab of folder options. I'm thinking some how this must be a registry issue. Anyone know a registry hack that will fix this problem and force windows explorer to open folders in the same window. I'm sick to death of having so many windows open. Im running Windows 7 Ultimate Beta 7100.

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• Corrupted files, hard drive test?

  - by all-R

  Hi guys, I'm currently on a macbook with a 1TB external hard drive connected trough a USB hub wich is connected on my macbook. The problem is, my disk, wich is partitioned in 2 (one HFS+ and one NTFS) keeps getting corrupted, recently it was my HFS+ partition, I could not repair it using the Apple's Disk utility, but was able to backup my files. Is it synonym that my hard drive is failing? Is it because of my USB hub? I also keep all my iTunes library on my external HD (HFS+ partition), and did a lot of transfer lately, adding files, removing etc. the last time, my partition got corrupted after a lot of deleted items. If anybody has an idea of what to check first, what could cause the problem, I would appreciate it :) Thanks!

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• Issue with corrupt 1tb volume: can we rescue SQL databases?

  - by Barrie Ashmore

  We have an instance where some how a 1tb volume has become corrupted. There are Event ID 55 errors in the system event viewer. When running chkdsk, it gets to 47% verifying indexes and returns to the command prompt. If we are unable to rescue the data on the drive then we have a full backup of the databases from some time ago. The logfiles of which are on a different volume which is intact. Would it be viable to restore the databases and somehow replay the log files? I have seen articles about replaying logfiles from a logfile backup (.trn), however we have the actual logfiles (.ldf) Any help would be appreciated.

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• Running Hyper-V and VMWare together

  - by Shiki

  I have two virtualization software on one of my laptops which is dedicated to Windows 8 development. A VMWare for generic virtualization and the Windows 8 like Hyper-V for the WP8 SDK. Unfortunately these softwares don't like each other. Is there a way to get them play along? The exact problem is that if I install the SDK, VMWare won't even update or run. There is only one way to make them work. Switch Hyper-V on and off. Which is one restart all the time.

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• Enterprise Level Monitoring Solution

  - by Garthmeister J.

  My company is currently looking to replace our current solution used for monitoring our web-based enterprise solutions for both up-time and performance. Please note this is not intended to be a network monitoring-type solution (internally we currently use Nagios). If anyone has a provider that they have had a positive experience with, it would be much appreciated. Here is a list of our requirements: • Must have a large number of probes/agents around the globe to be representative of our customer base • Must have a flexible scripting capability to automate multi-step user actions • 24 hour a day monitoring • Flexible alerting system • Report generation capability • Mimic browser specific monitoring (optional, not a must-have)

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• When computer turns on: keyboard/mouse/monitor don't work?

  - by dave

  the computer is barely good,at least i think..features Intel core 2 4 GB ram Nvidia Radeon 9600 512 mb Gigabite motherboad (the others i can't remember).. Used this computer for 3 years with no problem...The problem started one day after while it froze everything, then I shut down with removing the electricity power. A few hours later, I tried to log in to the computer but nothing moved. Nor keyboard nor mouse nor monitor worked, I was thinking that should be a delay so I left it some time. After a minute it turned off without my help around 30 seconds then it turned on automatically, but was the same problem like before and it goes again and again...any suggestions? If more info/specs required, let me know.

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• Error when trying to access Shared files from iMac [closed]

  - by SatheeshJM

  I used to access all my Windows XP shared files on my Mac using Finder -- Window -- Connect to server. Now all of a sudden, an error crops up when I try to connect. I get the error "There was a problem connecting to the server "192.168.1.*" The server may not exist or it is unavailable at this time. Check the server name or IP address, check your internet connection and then try again. How can I remove this error and access my shared files from my Mac? P.S my network connections is fine.

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• Is it possible to make a (Windows 7) executable automatically run when I put in my thumb drive?

  - by iconoclast

  I have portable apps on a thumbdrive, and want to automatically run the "menu" app (E:\Applications\Windows\Start.exe) when I insert that drive. I realize (or think I realize, based on a foggy memory of trying to find a way to do this some time ago) that it can no longer be done with the old autorun approach, at least not in Windows 7. But there must be some other way: maybe a daemon process that waits for the thumbdrive to be inserted, and then fires up the .exe file? Maybe a daemon that tries every five minutes or so to launch the menu, and doesn't make a fuss when it's not there. Maybe something else? How can I achieve this?

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• Automate hashing for each file in a folder?

  - by Kennie R.

  I have quite a few FTP folders, and I add a few each month and prefer to leave some sort of method of verifying their integrity, for example the files MD5SUMS, SHA256SUMS, ... which I could create using a script. Take for example: find ./ -type f -exec md5sum $1 {} \; This works fine, but when I run it each time for each shaxxx sum afterwards, it creates a sum of the MD5SUMs file which is really not wanted. Is there a simpler way, or script, or common way of hashing all the files in to their sums file without causing problems like that? I could really use a better option.

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• Google Chrome not using local cache

  - by Steve

  Hi. I've been using Google Chrome as a substitute for Firefox not being able to handle having lots of tabs open at the same time. Unfortunately, it looks like Chrome is having the same problem. Freakin useless. I had to end Chrome as my whole system had slowed to a crawl. When I restarted it, I opted to restore the tabs that were last open. At this stage, every one of the 20+ tabs srated downloading the pages they had previously had open. My question is: why can't they open a locally stored/saved copy of the web page from cache? Does Google Chrome store pages in a cache? Also: after most of the pages had completed their downloading, I clicked on each tab to view the page. Half of them only display a white page, and I have to reload the page manually. What is causing this? Thanks for your help.

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• Re-encoding a video file and increasing the size -- does this improve the quality?

  - by Josh

  If I have a video file at 320x240 resolution which I want to re-encode (because I don't like the encoding it's in now) and I also want to play it at double size (640x480), will I get higher quality if I scale it up to 640x480 when I convert it to a new format, verses keeping it at 320x240 in the new format and playing it at double size? This probably depends on the program used to convert, and if so, please let me know any program which might increase the quality. Here's my thinking. If I play a 320x240 file at double size, the system has to scale up each frame in real time, whereas if I scale up while recompressing the system may be able to use a more intensive algorythm like Bicubic interpolation . However I am not sure if this is true or not.

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• Extracting a .zip file into Program Files (x86)

  - by Evan

  I just got 64 bit Vista system after being on Windows XP. I'm trying to get all my useful programs up to date, and I've recently had a problem extracting files into the 32-bit program files directory (Program Files (x86)). I'm using 7zip to extract the eclipse-SDK-3.5-win32.zip directory into C:\Program Files (x86) Unfortunately, every time I've tried to do this, 7Zip reports can not open output file C:\Program Files (x86)\eclipse\... I've been able to extract it to C:\ and then move it, I'm assuming there's some protection on the Program Files directory that is causing some problems. Any suggestions?

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• Issue with aborted MySQL connections (error code: 4)

  - by arikfr

  Some of the connections between my application server (Ubuntu, Apache, PHP) and my DB server (Ubuntu, MySQL) are failing with error code 4. According to the documentation error code 4 is: OS error code 4: Interrupted system call At first I thought that maybe the issue is that the DB server has too many connections and fails because there are too much open files. But it seems not to be the case because: Too many open files has different error code (24). I've checked and during peak time the server had 497 files open (checked using lsof command) while the maximum is 1024. The TCP settings were already checked (see prior question). Any ideas what this can be or what should I check?

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• Uptime concerns in case of AWS outage

  - by Aditya Patawari

  I am running an Elastic Load Balancer backup by 2 instances in different Availability Zones in US East. I am using Multi-AZ RDS as well. Ideally this should ensure that if one AZ goes down, it should not effect the app because everything is spread across multiple AZs. But the recent AWS outage took the app down for a long time. I am not sure how this can happen. It would be great if someone can point out what went wrong. Major question here I have is how can I avoid this in future? I can setup app servers across different regions or even providers and use DNS for load balancing but what do I do with MySQL? Read Replicas will introduce some lag which I would want to avoid.

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