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• Which PSU should I chose? The biggest is the best?

  - by Shiki

  I'm fully aware of PSU's "Active PFC" and that they won't consume the written W all the time. (Makes sense). But now I'm before a PSU replacement (Guys: NEVER buy a Chieftec. Seriously.) The question is: If one can get a bigger one (in my case 750W and 650W) ... should that person go for the bigger one ? (The difference in price is not much). No, I don't think I'll soon use all that much. (Help (if you want of course) to make the question more generic if the question is really not OK in this form. I've been wondering about this for a time already. In my case it would be XFX Black Edition Silver 750W and 650W)

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• Straight-forward to Virtualise with XEN or KVM on IBM Server System x3650 M4 791562G?

  - by ChrisZZ

  I want to built a virtualised Server Environment using XEN or KVM. The virtual machines should be purely debian systems - so XEN or KVM should be a sane choice. Now while buying servers, I am confronted with the fact, that the vendors obviously only support commercial solution. I think, on a good server, one should be able to install uncommercial software as well - but of course sometimes systems have hardware, that requires drivers, that are not found in the OS Community. So I am asked the question: Is it straight-forward to use Debian with IBM Server System x3650 M4 791562G with Debian - or even virtualising the IBM Server System x3650 M4 791562G using XEN or KVM. I am sure there will always be a way to achieve this goal - but this way might have a high milage - so I am not asking, whether this is theoretical possible, but whether this should be straight-forward and practically easy to do, no major headaches to be expected.

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• Does a receiving mail server (the ultimate destination) see emails delivered directly to it vs. to an external relay which then forwards them to it?

  - by Matt

  Let's say my users have accounts on some mail server mail.example.com. I currently have my mx record set to mail.example.com and all is good. Now let's say I want to have mails initially delivered to an external service (e.g. Postini. Note that this is not a postini-specific question though). In the normal situation where my mx is set directly to my mail server mail.example.com, sending MTAs will of course look up my MX and send to mail.example.com. In my new situation I'd have my mx set to mx.othermailservice.com and emails would be received there. OtherEmailService.com will then relay the emails (while keeping the return-path header the same) to mail.example.com. Do the emails that are received at mail.example.com after be relayed from the other service "look" any different than emails that go directly to it as would be the case where the mx was set to mail.example.com?

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• Benefits of a RAID BBU in addition to a double UPS + PS system

  - by Wikser

  Today I roughly measured the benefits of enabling write-back on the RAID controller on a server at work. It got no RAID battery-backup-unit (BBU) so the write-cache is currently disabled. As the server is not used to capacity (by far), the results in most test were spectacular, e.g.: Database CRUD: before 35s, after 4s Saving a 1MB Excel file: before: 20s (!), after: 0.5s Of course having a BBU is always recommended, but what are the main benefits of installing a BBU to a system, which got redundant power supplies and is attached to UPSs? Does this depend on the type of the system (database, file, terminal)? What is a realistic fail scenario which could be prevented by a BBU? Thanks in advance!

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• Can the Nikon D50 be hacked to record video?

  - by andy

  I mean hacked in terms of software only, and minor hardware hacking if necessary, without of course breaking the camera. Also, if possible, video should be able to be recorded at an acceptable frame rate, around 20fps. thanks p.s. Reason for this question: Just to give some context before people tell me to buy a new camera! For still photography I now almost exclusively shoot film with a Nikon F3, and my D50 is gathering dust. I want to shoot some video of my Capoeria classes, for personal use, and thought maybe I could put my D50 to good use. Yes, I could buy a D5000 or older D90, but really I just want to shoot some video with my nice wide Nikkor lenses at no extra cost!

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• Filter tagged threads in Thunderbird

  - by Let_Me_Be

  I have a big issue with Thunderbird, I need to process a lot of emails coming from request tracking system. Since only few of those apply to me personally, I tag these threads with appropriate tags. The issue now is that I would like to filter out threads, that do apply to me and those that I haven't tagged yet. I'm unable to do this, because new emails keep arriving into the already existing threads, and of course, these new emails don't get the tags. Basically I would need some sort of filtering rule, that would apply not to a specific message, but the master message in the thread. Is there some possibility to create such filters, or is there some other facility, that would allow me to do the same? Tags are great, since they are actually saved into the messages and correctly sync across multiple machines when using IMAP.

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• Is a memory upgrade a viable option to fix performance issues? [closed]

  - by ratchet freak

  I'm currently seeing my PC getting bogged down by Firefox 11.0 alone with only one hundred tabs open. Resulting in a memory use of over 530M , VM size of over 800M and an insane amount of page faults (easily reaching 100 million over the course of the day). The PF delta during normal operation easily reaches 7k with peaks to 15k sometimes reaching over 20k. This leads to a (real) deterioration to response time when switching, opening and closing tabs, opening menus, typing, ... My question is: Am I right in assuming that plugging in more RAM (either adding 2x1GB or replacing the existing RAM with 2x2GB or 4x1GB) will solve this problem? My specs: Windows XP Home Edition SP3 (32 bit) Intel Core Duo 2,4 GHz 2x512MB RAM 800MHz DDR2 (dual channel) 4MB unified cache 320GB HDD Intel G33 (X3100) onboard graphics (no graphics card but PCI express x16 slot is available)

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• itunes equalizer per track settings

  - by DA

  I'm a little confused about iTune's ability to set eq presets on a per-song basis. I have a song that I open, set to a given EQ preset, then close. When I play this song, however, the audio isn't being adjusted. If I open the EQ and turn it 'on', though, it then obeys the song's eq setting. Of course, if I leave the EQ on, then songs that do not have their own EQ setting default to whatever the EQ was originally set at. Not a HUGE deal, but it means that I would then normally have to have EQ always turned on, set to flat, so that any song that I HAVE given a EQ setting to will use it. Am I understanding how that works correctly? Is there a way to have individual songs use their EQ setting without having to turn on the EQ for everything?

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• Can you use a DVI-VGA Adapter on a monitor instead of a video card?

  - by Joel Coehoorn

  I suspect the answer to this is "no", but here goes: I have a monitor with inputs for DVI and VGA. I want to be able to share this display with two computers (one at a time, of course) that both have VGA only. I also have a DVI-VGA dongle that came with a video card that's in a different computer. Can I connect this dongle directly to the DVI port on the monitor so that I can connect both VGA computers? I'd rather not resort to a kvm.

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• In Linux, is it possible to get a listing of drives' disk space usage that also shows volume labels?

  - by DavidH

  I know about df, of course, but df does not output volume labels. I have 5 USB hard drives plugged into my NAS box, and would love to know which is which. Current df output: Filesystem Size Used Avail Use% Mounted on /dev/sda1 27G 2.2G 24G 9% / none 56M 476K 55M 1% /dev none 60M 0 60M 0% /dev/shm none 60M 332K 59M 1% /var/run none 60M 0 60M 0% /var/lock none 60M 0 60M 0% /lib/init/rw /dev/sde1 150G 102G 48G 68% /media/usb0 /dev/sdb1 299G 196G 103G 66% /media/usb1 /dev/sdc1 233G 183G 51G 79% /media/usb2 /dev/sdd1 233G 209G 25G 90% /media/usb3 /dev/sdf1 150G 101G 49G 68% /media/usb4

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• I want to host my own multiple Websites on my server. How do i setup my own child nameserver?

  - by basilmir

  I host my own multiple Websites on my server. How do i setup my own child nameserver? There are 4 different websites, with .com and .net and .ro at the end. I moved them to my own server. My Domain Administration (Registrar) let's me define my own child nameserver with my own IP and i've added my nameserver as my domain nameservers list. ns.something.ro as the first and only in the nameservers list ns.something.ro with my own IP address as the child nameserver I've setup everything and it works (kind of). When i use my ns IP adress directly i can of course access everything. Using "normal" external dnses will not work. As expected others on the web can't resolve correctly. What's wrong? Am i missing something?

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• In DNS can an IN NS point to a CNAME?

  - by embobo

  Is it allowed to have an NS record be a CNAME? E.g.: subdomain.example.com. IN NS ns1.example.com. ns1.example.com. CNAME foo.example.com. foo.example.com. IN A 10.1.1.1 This doesn't seem to work in bind though this (of course) does: subdomain.example.com. IN NS foo.example.com. foo.example.com. IN A 10.1.1.1 Any pointers to RFCs prohibiting this setup would be appreciated.

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• Automatic repair software

  - by ADOConnection

  Do anyone knows any kind of apps or services for "taking care of servers"? (besides managed servers) There are hundreds of ways your server or application can stop working properly. Small things are easy to miss but usually easy to fix. Log overgrouth, configuration issues, etc. Of course there are best practice checklists, but its not a human task to check configuration best practices. Im sure it can be automated: some kind of agent can monitor all system settings, say what is right and wrong and give suggestions on how to make it right. I have to admin several servers and I need some kind of overview of overall situation. As well as a tool, that will fix problems automatically. Can you people suggest something? (I know its a little bit out of rules of SF, but I think this particular question is quite specific) It would be great to have something like http://stackoverflow.com/questions/1451319/asp-net-mvc-view-engine-comparison but for automation software.

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• How to use ccache selectively?

  - by Anonymous

  I have to compile multiple versions of an app written in C++ and I think to use ccache for speeding up the process. ccache howtos have examples which suggest to create symlinks named gcc, g++ etc and make sure they appear in PATH before the original gcc binaries, so ccache is used instead. So far so good, but I'd like to use ccache only when compiling this particular app, not always. Of course, I can write a shell script that will try to create these symlinks every time I want to compile the app and will delete them when the app is compiled. But this looks like filesystem abuse to me. Are there better ways to use ccache selectively, not always? For compilation of a single source code file, I could just manually call ccache instead of gcc and be done, but I have to deal with a complex app that uses an automated build system for multiple source code files.

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• Migrating to a new server

  - by KThompson

  I was asked by a client to move a website to a new server. Normally I would make a local copy by downloading it and then uploading it to the new server after making any necessary configurations of course. This particular client has like 1 million images ranging up 1MB and I still haven't found a solution as to how to move these properly. I have tried zipping them on the server first but the file gets too big and it seems to just stop. Anyway, the client told me he can set up a "portal" so I don't have to download and re-upload the files. I have never heard of this no can I find what this is. Any of you know something that fits this description or solution to my image problem? Thanks in advance

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• Any advice on what to do when getting a cryptic blue screen in windows?

  - by Svish

  What are some steps that you usually take? Are there any good ways of finding out what they mean etc.? For example I have gotten these ones where it pretty much only says "IRQ less or equal to" (or something like that) which I must say, doesn't really tell me much! Another one I got more recently was something in the lines of "Some application changed some files it shouldn't have". And there were of course no information on what files, or what application... What can you do?

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• How to Check the Performance of VPS?

  - by Ngu Soon Hui

  I have subscribed to a VPS offered by a hosting provider. The guaranteed performance 1GB RAM, 1M bandwidth. But I found that from time to time the websites can be very slow, so slow that it could take more than 30 seconds to load a simple Joomla website. However the website resumed the usual speed after a few minutes. This created a problem for me when I want to report the performance problem to the hosting provider. They would say to me "see, no problem". Of course there is no problem because the problem is only there for a few minutes , and everything is normal. This ocassionally-slow problem will bug me a few days later and the cycle repeats. Any idea how to solve this problem?

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• How to select a user and remove all groups they are a member of using Powershell (with Quest)?

  - by Don

  I've read quite a bit online about this and thought I had found a solution, but it doesn't seem to be working like I would expect. I am wanting to get a user based on the username I input, then remove all groups that it is a member of. Basically the same thing as going into ADUC, selecting the user, selecting the Member Of tab, highlighting everything (except domain users of course) and selecting remove. Here's the command I'm trying to use: Get-QADUser -Name $username | Remove-QADMemberOf -RemoveAll Others have said online that it works for them, but so far it hasn't for me. It doesn't give an error, it accepts the command just fine, but when I look in ADUC, the groups are still there for the user. Any suggestions as to what I may be doing wrong? Executing from Windows 7 with domain admin rights, Exchange cmdlets and Quest snapin loaded. Thanks!

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• FreeNAS 8 and ext fs

  - by oraclecow

  i'm trying out freenas8 for my personal NAS, i have lots of data that was in an ubuntu server, but somehow i never got the file sharing right. on freenas things just worked. i installed on usb, tried sharing the windows disk, and i can see it on my windows 7 right away. my question is, is it ok to use ext4 fs from my ubuntu instalation ? i only saw zfs, ufs, ntfs, and ext2 option to import, i havent plugged in the disks yet, but im wondering the consequences, like if it asked to format like in windows to use. i can format the disks of course, but 5-6 TB of data juggling and reformatting is a lot of work, unnecessary work i think, does the zfs worth the trouble of formatting everything ? since i'm thinking to use it if i have to format it anyway and zfs looks more interesting than ext2.

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• What do I need to get so I can upgrade my Thinkpad x61 Tablet hard drive?

  - by user36118

  My Thinkpad X61 Tablet is running out of space, and I would like to give it a bigger drive. I would like to clone the old drive to a bigger new drive. What do I need to get to accomplish this? The fewer things to get, the better, of course. The easier, the better. My system: Thinkpad X61 Tablet. XP w/ the latest SP. I am OK with XP, and don't want to reinstall it. No optical drive. USB 2.0 connectors (Bootable, I think). Things I have: USB 2.0 external drive housing. USB flash stick (2GB).

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• Excel macro to delete empty rows isn't stopping

  - by RocketGoal

  How do I make it stop after a certain amount of rows? I've taken a VBA course and my teacher explained how to delete empty rows. I'm now trying to put this in place but my macro isn't stopping. I thought I had limited it to 200 rows. I'm missing something important. Any pointers much appreciated. Sub RemoveRows() ' Remove rows from last blank cell Dim LastRow As Long Dim ISEmpty As Long 'Count how many records in the list. This is done so that the Do loop has a finish point. LastRow = Range("A200").End(xlUp).Row 'Start at the top of the list Range("A1").Select 'Loop until the end of the list Do While ActiveCell.Row < LastRow 'Assign number of non empty cells in the row ISEmpty = Application.CountA(ActiveCell.EntireRow) 'If ISEmpty = 0 then delete the row, if not move down a cell into the next row If ISEmpty = 0 Then ActiveCell.EntireRow.Delete Else ActiveCell.Offset(1, 0).Select End If Loop End Sub

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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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• UFW blocking webrick on port 3000

  - by t Book

  On a ubuntu 10.0.4 server runs redmine. starting webrick with: ./server webrick -e production -b lvps46-173-79-113.dedicated.hosteurope.de -d makes redmine available in browser. as soon as we enable ufw, webrick can´t be accessed anymore. of course we allowed Port 3000 from anywhere ufw allow 3000/tcp ufw allow 3000/udp also a grep for iptables doesn´t show a deny rule iptables -nL | grep 3000 find the whole iptables output here http://pastebin.com/k6WNqdPU checking lsof -ni tcp:2222 tells me ruby is listening on port 3000 ruby 3457 root 5u IPv4 864846667 0t0 TCP 46.173.79.113:3000 (LISTEN) What else can we check? what´s wrong with the ufw rules for port 3000?

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• Effectively managing crontab

  - by jakenoble

  My crontab looks something like this; 1 * * * * /var/www/cron/site1.sh > /dev/null 2>&1 0 * * * * /var/www/cron/site2.sh > /dev/null 2>&1 3 * * * * /var/www/cron/site3.sh > /dev/null 2>&1 This works great and lets me place all the nasty little script calls into one place, rather than making crontab harder to read than it already is. But, this fails massively when site2.sh needs one script to run once a day, another to run once a week and another to run every 5 minutes. And of course it gets worse as new scripts get added with different timings. Is there a better way? EDIT By better I mean making it more manageable, having a large crontab is not manageable, but neither is having scripts all over the place. Not a GUI necessarily.

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• For very beginning startup: home server or EC2?

  - by StCee

  The micro instance of Amazon EC2 only has ram of 613MB, my laptop got 8GB. And I suppose likewise the processing power of my computer would be better than the micro instance. My question is, what are the considerations in deciding to host yourself or on Amazon EC2, especially for a really baby startup? For example, would network speed be a problem? My computer broadband network is 100Mbs up to 1Gbs. What would Amazon compare to this? My site at these moment would just host some images and perform some php requests. I would probably also use cloudflare but seems it increases the dns lookup time considerably... And of course the overall objective is to make the best user experience.

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