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• How small (spec wise) can a virtual machine be and still boot up and run some sort of OS?

  - by IllvilJa

  One of the advantages with virtual machines is that you can be very flexible with their sizes. If the host system permits it, you can have a very large virtual machine with a lot of virtual RAM and disk. Also, you can decide to go the other way around, to give the virtual machine a very modest amount of RAM and disk and then choose and configure the OS appropriately. The question is, how small virtual machines have people managed to setup (and get to both boot up and to run)? Virtual machines doing something usuful is preferable, even if I know "useful" in this context is awfully subjective, but laboratory-cases with a configuration stripped beyond common sense could be intresting as well, just to see what people manage to boot and run. Quite open ended question and quite academic, but think of it: an extremely small VM (which still does something useful) takes very little memory and disk and can be quite quickly saved to and restored from disk. If it's also gentle on CPU resources, one might consider having a huge number of such VMs up and running on a host. (Imagine a VM running just an old Commodore 64 or Commodore Amiga in it. Ok, way wrong CPU architecture for modern Virtualization software running on a x86-based PC but still an interesting thought. You could have quite a few such small VMs running on a modern PC.)

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• Migrating mysql 4 to mysql 5

  - by Lennart Regebro

  This seems to me to be a common use case, so I'm surprised so little information is about it, so sorry if it's a duplicate, but I have searched. :) I'm migrating a clients website from one CMS to another, and of moving to newer faster machines all at the same time. As a part of this I'm moving a MySQL database from the old server to the new ones. The problem is that the old server runs MySQL 4 and the new MySQL 5. So when i do a mysqldump at the old site and then try to run it on the new site I get syntax errors. ERROR 1064 (42000) at line 178: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'BTREE (`id`), KEY `f_ChangedOnWeb` (`f_ChangedOnWeb`), KEY `f_AddressUpdate`' at line 56 I also tried to use an even older syntax by dumping with --compatible mysql323, but that just resulted in ERROR 1062 (23000) at line 2283: Duplicate entry '??????????' for key 2`... It seems to me this must be a reasonably common use case, yet I can't find any sort of help on this. Possibly all my Google searches just drown in irrelevant answers. Most seem to agree that mysqldump is the right answer, but noone mentions that you can get syntax errors...

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• Looking for software to create a personal hotspot on Mac OS X (not using the built-in ability)

  - by Fred

  I got my nifty little MacBook Air today. Since I will be going on travel I was hoping to use my iPad 3G as screen extension with Air Display. It works being in a shared WiFi network. Sadly Apple is a bit restrictive on the tethering with their mobile devices such as the iPad. Now I read iOS 4.3 will enable the iPad to use tethered networks. But the feature will not be working for iPad 3G. I assume their big partner telecom companies fear everyone will quit their internet contract with them. So I want to create a personal hotspot on my MacBook and use it on my iPad. But the iPad is not able to use this network. The network is visible but not usable. On Windows there is this connectify program which lets the PC act as wireless router. Does anybody know a similar program for Mac which would turn it into a wireless router? Or is there something I don't see with Mac OS X's builtin features?

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• amavisd + postfix + dovecot blocks gif images

  - by David W

  I occasionally have a client who tries to email me and says his email gets blocked by my server. When I check the logs, I see this: Sep 6 18:12:52 myers amavis[15197]: (15197-08) p.path BANNED:1 [email protected]: "P=p003,L=1,M=multipart/mixed | P=p002,L=1/2,M=application/ms-tnef,T=tnef,N=winmail.dat | P=p004,L=1/2/1,T=image,T=gif,N=image001.gif,N=image001.gif", matching_key="(?-xism:^\\.(exe|lha|tnef|cab|dll)$)" And then a little later... Sep 6 18:12:58 myers amavis[15197]: (15197-08) Blocked BANNED (.image,.gif,image001.gif,image001.gif), [213.199.154.205] [157.56.236.229] <[email protected]> - > <[email protected]>, quarantine: banned-g4QhZGvwJvDF, Message-ID <6A9596BE385EC1499F83E464FA9ECCA20C668320@BY2PRD0611MB417.namprd06.prod.outlook.com>, mail_id: g4QhZGvwJvDF, Hits: -, size: 20916, 8439 ms From this and the bounce that he forwards me (to a different address I give him), I determine that its bouncing because of the file in his signature (image001.gif). However, that does NOT match the "key" in this part of the log: matching_key="(?-xism:^\\.(exe|lha|tnef|cab|dll)$)" Furthermore, the .gif extension is nowhere to be found in the /etc/amavisd.conf file (i.e. I'm not blocking emails because they contain .gif images). Am I missing something here? This is strange... and annoying.

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• Parental Controls in Ubuntu - per user

  - by Hamish Downer

  I would like to set up parental controls on Ubuntu for a friend of mine. I want it so that the child user has the controls set, but the parent user is not restricted. To be clear, they are sharing one computer, so a router based solution won't help. And I would like a set of step by step instructions to do this. Just one way of doing it. I'm an experienced Ubuntu user, happy at the command line. I've spent quite some time googling for this along the way. I hope that the GChildCare project will eventually make this easy, but it is not ready yet. In the meantime, the WebContentControl GUI provides a way of managing parental controls, but apply them to every user on the computer (easy WebContentContol install instructions and detailed instructions, discussion and related links on ubuntuforums). The ubuntuforums post has a FAQ that states that user-specific configuration is not possible with WebContentControl, and then provides 3 links he used to help him do it. But they are far from step by step instructions. There is this thread which is notes along the way and linking to this article about squid and dansguardian. And then to these two dansguardian articles which are somewhat in depth ... So does anyone know of an existing guide to how to set up parental controls on ubuntu with some users not affected? If no one has come up with an answer after a little bit, I'll set up a community wiki answer so we can come up with a guide.

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• MySQL-Cluster or Multi-Master for production? Performance issues?

  - by Phillip Oldham

  We are expanding our network of webservers on EC2 to a number of different regions and currently use master/slave replication. We've found that over the past couple of months our slave has stopped replicating a number of times which required us to clear the db and initialise the replication again. As we're now looking to have servers in 3 different regions we're a little concerned about these MySQL replication errors. We believe they're due to auto_increment values, so we're considering a number of approaches to quell these errors and stabilise replication: Multi-Master replication; 3 masters (one in each region), with the relevant auto_increment offsets, regularly backing up to S3. Or, MySQL-Cluster; 3 nodes (one in each region) with a separate management node which will also aggregate logs and statistics. After investigating it seems they both have down-sides (replication errors for the former, performance issues for the latter). We believe the cluster approach would allow us to manage and add new nodes more easily than the Multi-Master route, and would reduce/eliminate the replication issues we're currently seeing. But performance is a priority. Are the performance issues of MySQL-Cluster as bad as people say?

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• Intel Atom overheating in ASUS EEE Box 1501P

  - by Sergey L.

  I have had an ASUS EEE Box 1501P for just a little bit over a year. Of course it breaks 2 months after the warranty runs out. http://www.asus.com/Eee/EeeBox_PC/EeeBox_PC_EB1501P/ I have been using the box as a Home Media Center. Running mostly 24/7 often pausing a video overnight. Since last week the fan started running extremely loud. After some digging I found that the Intel Atom CPU in it is overheating and the built-in sensor is reporting temperatures way over 105°C. This got me worried, so I took the unit apart. Completely vacuumed the heat sink, oiled the fan, but the unit is still showing the same behaviour. After turning it on and just observing the hardware monitor in the BIOS the temperature slowly rises from 40°C to over 95°C in appx 5 min. I am running the newest BIOS and a lightweight Linux OPENELEC OS with XBMC on it. Now I am wondering if it could be a faulty heat sensor in the Atom. Recommended running temperature is up to 85°C, but I have not detected any performance hits when running at the above mentioned 105°C and there seem to be no software faults. How can an Atom with an attached heat sink and a fan running at full capacity even get this hot in the first place at 0 load? Aren't those things designed to generate virtually no heat? Could it be a faulty heat sensor? What shall I try to fix this? I would prefer not to damage the CPU, since it is hard fused into the motherboard and cannot be replaced. I could remove the heat pipe/heat sink, but it is getting hot, so heat is properly transferring from the CPU to the heat pipe, the fan is running at full capacity, is recently oiled and warm air is making it out of the exhaust. Edit: One more note: The North-bridge (or whatever it is called nowadays) is on the same heat pipe.

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• System Center Essentials server running out of disk space due to stored old updates

  - by Ricket

  We have a System Center Essentials (SCE) server to filter updates to our laptops. We've configured it to download the update, and then the laptops get the update from this server; this of course reduces our internet bandwidth and the time it takes for employees to receive the updates, which reduces the complaints we get about how long updates take. However we currently have a total of 2,255 updates stored on the server. SCE gives a breakdown: Updates with installation errors: 29 Updates needed by computers: 280 Updates installed/up-to-date: 0 Updates with no status: 1946 Our little server has 68gb of hard disk space, and the updates are currently taking 32gb and counting. Some of the updates date back to 2003, but we can't figure out a way to delete them to free up space on the server. Right-clicking an update and clicking Uninstall threatens to remove the update from all computers, which is not what we want. Some of the updates even inform us upon viewing: This update has been replaced by a newer update. Before declining this update, it is recommended that you approve the new update first and verify that this update is no longer needed by any computers. How do you prevent your SCE server from filling its hard drive space? Is there a way to configure the server to only keep updates that are still needed? Furthermore, why (in the above breakdown of updates) are there so many updates with "no status" and 0 updates that are "installed/up-to-date"?

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• Apache, suexec, PHP, suPHP

  - by Chris_K

  While I'm quite comfortable as a Linux user, my Linux Admin-fu is a bit weak. Thus, I'm here looking for guidance with a CentOS server I'm about to build. I need to setup an Apache2 web server for a few of our clients. I want each client's web content to be under their home directory (USERDIR in apache.conf, right?) for the static HTML sites. I want Apache to run as the client (suexec?). Some of their stuff will be PHP apps and I'm under the impression I'll want to look at suphp as well then. So basically I want to look like a small version of a shared web hosting company. Considering how common those are I thought I'd easily find a nice current How-To guide on setting this all up but so far I've had very little luck. I suspect my search words are off. So the questions (feel free to answer any or all): Anyone have some solid links to current/modern guides that would help me set this all up? No, the apache documentation site is not a guide ;-) Since I have a mix of static sites and PHP apps do I want/need both suexec and suphp installed? If so, does that introduce any challenges I should be aware of? Should I be looking at other options instead of suexec and suphp? I plan to give the end users SSH, SFTP or SCP access to their stuff (if that affects anything). Thanks in advance for your help.

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• Archive software for big files and fast index

  - by AkiRoss

  I'm currently using tar for archiving some files. Problem is: archives are pretty big, contains many data and tar is very slow when listing and extracting. I often need to extract single files or folders from the archive, but I don't currently have an external index of files. So, is there an alternative for Linux, allowing me to build uncompressed archive files, preserving the file attributes AND having fast access list table? I'm talking about archives of 10 to 100 GB, and it's pretty impractical to wait several minutes to access a single file. Anyway, any trick to solve this problem is welcome (but single archives are non-optional, so no rsync or similar). Thanks in advance! EDIT: I'm not compressing archives, and using tar I think they are too slow. To be precise about "slow", I'd like that: listing archive content should take time linear in files count inside the archive, but with very little constant (e.g. if a list of all the files is included at the head of the archive, it could be very fast). extraction of a target file/directory should (filesystem premitting) take time linear with the target size (e.g. if I'm extracting a 2MB PDF file in a 40GB directory, I'd really like it to take less than few minutes... If not seconds). Of course, this is just my idea and not a requirement. I guess such performances could be achievable if the archive contained an index of all the files with respective offset and such index is well organized (e.g. tree structure).

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• How does the LeftHand SAN perform in a Production environment?

  - by Keith Sirmons

  Howdy, I previously asked this ServerFault question: Does anyone have experience with lefthands VSA SAN The general consensus looks like it does not perform well enough for a production SQL server even at a light load. So the new question is, How does LeftHand's SAN perform on the HP or Dell dedicated Hardware boxes? We are looking at the Starter SAN with 2 HP nodes in a 2-way replication, 2 ESX servers hosting a total of 2 Active Directory server, 1 MS SQL server, 1 File Server, and 1 General Purpose Server for things like Virus Scan (All Microsoft Server 2005 or 2008). The reason I am looking at LeftHand is for the complete software package. I plan to have a DR site and like how the SAN can perform an Async Replication to the offsite location without having to go back to the Vendor for more licenses. I also like the redundancy built into the Network Raid architecture. I have looked at other SANS and found different faults with them. For example, Dell's EqualLogic: Found that although the individual box is very redundant in hardware, the Data once spanned across multiple boxes is not redundant, if a node goes down you have lost the only copy of the data sitting on that hardware (One thing is certain, all hardware fails... When? is the only question.). I have used an XioTech SAN as well.. Well worth the money BTW, but I think it is overkill for the size of the office I am targeting. The cost to get the hardware redundancy in the XioTech makes it a little out of reach for the budget I am working in. Thank you, Keith

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• How to extract terms from an HTML document

  - by bookcasey

  I have a HTML document filled with terms that I need to put into a spreadsheet. They follow this basic pattern: <ul> <li class="name"><a href="spot.html">Spot</a></li> <li class="type">Dog</li> <li class="color">Red</li> </ul> <ul> <li class="name"><a href="mittens.html">Mittens</a></li> <li class="type">Cat</li> <li class="color">Brown</li> </ul> <ul> <li class="name"><a href="squakers.html">Squakers</a></li> <li class="type">Little Parrot</li> <li class="color">Rainbow</li> </ul> It's very consistent. I need to extract the string within the li.name a (so, "Spot") but only if the type is "Dog" or "Parrot", and put them in a spreadsheet. I've been trying to use Sublime Text's ability to Find with regex, but I'm really struggling, and since regex and HTML usually don't play nice, I was wondering if there is a better and easier way to accomplish this. Thanks.

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• Find out which task is generating a lot of context switches on linux

  - by Gaks

  According to vmstat, my Linux server (2xCore2 Duo 2.5 GHz) is constantly doing around 20k context switches per second. # vmstat 3 procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu---- r b swpd free buff cache si so bi bo in cs us sy id wa 2 0 7292 249472 82340 2291972 0 0 0 0 0 0 7 13 79 0 0 0 7292 251808 82344 2291968 0 0 0 184 24 20090 1 1 99 0 0 0 7292 251876 82344 2291968 0 0 0 83 17 20157 1 0 99 0 0 0 7292 251876 82344 2291968 0 0 0 73 12 20116 1 0 99 0 ... but uptime shows small load: load average: 0.01, 0.02, 0.01 and top doesn't show any process with high %CPU usage. How do I find out what exactly is generating those context switches? Which process/thread? I tried to analyze pidstat output: # pidstat -w 10 1 12:39:13 PID cswch/s nvcswch/s Command 12:39:23 1 0.20 0.00 init 12:39:23 4 0.20 0.00 ksoftirqd/0 12:39:23 7 1.60 0.00 events/0 12:39:23 8 1.50 0.00 events/1 12:39:23 89 0.50 0.00 kblockd/0 12:39:23 90 0.30 0.00 kblockd/1 12:39:23 995 0.40 0.00 kirqd 12:39:23 997 0.60 0.00 kjournald 12:39:23 1146 0.20 0.00 svscan 12:39:23 2162 5.00 0.00 kjournald 12:39:23 2526 0.20 2.00 postgres 12:39:23 2530 1.00 0.30 postgres 12:39:23 2534 5.00 3.20 postgres 12:39:23 2536 1.40 1.70 postgres 12:39:23 12061 10.59 0.90 postgres 12:39:23 14442 1.50 2.20 postgres 12:39:23 15416 0.20 0.00 monitor 12:39:23 17289 0.10 0.00 syslogd 12:39:23 21776 0.40 0.30 postgres 12:39:23 23638 0.10 0.00 screen 12:39:23 25153 1.00 0.00 sshd 12:39:23 25185 86.61 0.00 daemon1 12:39:23 25190 12.19 35.86 postgres 12:39:23 25295 2.00 0.00 screen 12:39:23 25743 9.99 0.00 daemon2 12:39:23 25747 1.10 3.00 postgres 12:39:23 26968 5.09 0.80 postgres 12:39:23 26969 5.00 0.00 postgres 12:39:23 26970 1.10 0.20 postgres 12:39:23 26971 17.98 1.80 postgres 12:39:23 27607 0.90 0.40 postgres 12:39:23 29338 4.30 0.00 screen 12:39:23 31247 4.10 23.58 postgres 12:39:23 31249 82.92 34.77 postgres 12:39:23 31484 0.20 0.00 pdflush 12:39:23 32097 0.10 0.00 pidstat Looks like some postgresql tasks are doing 10 context swiches per second, but it doesn't all sum up to 20k anyway. Any idea how to dig a little deeper for an answer?

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• DPM server 2010 Attach agent error : administrator privileges missing?

  - by Michael

  Hello, I’m hoping you would be able to help me out with this little problem I’m having. I installed DPM 2010 in our test environment to test backups on Exchange 2010 servers. The environment includes : 1xDC 2x Exchange Server 2010 1x DPM 2010 server All of these are running on Microsoft server 2008 R2 Virtual machines. The host machines are using Hyper-v. So the problem goes like this : 1- I tried to install the agents from the DPM server GUI, which failed saying I didn’t have the correct permissions. 2- So then I tried the manual installation using the commands from : the Microsoft site http://technet.microsoft.com/en-us/library/bb870935.aspx 3- The agent installation worked but when I get to attaching the agents to the DPM server it still gives me the error saying that the specified account does not have administrator rights. 4- I tried the Domain admin, users who are domain admin + local admin, single local admins. 5- I have turned off the windows firewall and made sure all the services are running. So now I’m out of ideas and really need help, the agent attach to the DPM server is the last thing that is holding me back from deploying everything to the production site. Any help would be really appreciated.

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• What service do you use for music on hold?

  - by Russ Warren

  This may not be a sysadmin question for some, but it is definitely a hurdle I have to jump as the sysadmin for my company. We recently rolled-out a company wide VoiP system (Switchvox, to be exact) that has come preloaded with some royalty-free music on hold. Our customers have been complaining that the music on hold sounds like "funeral music." This may be the case (although I wouldn't want it played at my funeral), but it is all we have and we aren't willing to be sued over using music that isn't properly licensed. So, that brings me to the question asked in the title -- what and/or how do you provide decent music on hold? I'm assuming many people here use a PBX that allows customized music, so this has to apply to many of you. We've been looking at some sites that allow you to download royalty-free music for a one-time fee, but the music seems...lame. Something like a one-year subscription from ibaudio.com seems to be the best bet so far. Have you been able to discover something a little more mainstream for a decent licensing fee? Thank you. EDIT: Our PBX allows the playback of MP3 and OGG files, but does not allow streaming of a live audio source, Internet-based or otherwise. It also does not allow the use of a "line-in" source such as a CD player or radio. Don't let this stop you from sharing your setup, though. I'm interested in hearing what everyone uses!

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• How to generate thumbnails for less common video containers (mkv, ogm, mp4, flv, rmvb and mov) in wi

  - by fluxtendu

  So how to generate thumbnails for these containers? I know that the install of "DivX Plus Tech Preview: MKV on Windows 7" does it for MKV. But I think that only some registry changes are really necessary and I want it for other containers. If it's possible to avoiding the install of (always bloated) codecs packs it would be nice... Maybe only installing ffdshow or essential and separated codecs. (some time ago I have try reg files for vista without success...) Update: I have installed Win7codecs & tweaked a little its settings and I got almost everything I want. (I have also re-installed the relevant part of the divx plus tech preview to get something else than an all black preview for MKV) Issues that I still want to resolve: Find a cleaner & lighter method Almost all my rmvb and mov files got an all black preview (installing real media/quick time alternative doesn't help, is it the same with the officials?) With almost all containers (avi, mkv, ogm, mpg), I have (few) random files that don't get the preview. I could play them in WMP or another player and don't have found a pattern in the codecs used. All wmv, flv and mp4 have previews but I have less files in these containers. (I clear my thumbnails cache to test them) More generally I would like to understand how windows handle the containers & codecs to generate the previews. And a software that let me choose arbitrarily the pictures previewed would be convenient too

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• Is there a small business router that shows bandwidth usage graphs in the admin panel?

  - by Robert Drake

  I support a large number of public libraries that are having their networks upgraded in response to a grant application. These libraries are generally home to between 6-15 computers and have little or no tech services either onsite or contracted remotely. In order to justify current and future purchases, a number of the libraries have requested routers that can provide bandwidth usage graphs that they can show to their managing boards. Is there a small business router that displays traffic graphs in the router administration web interface? The router needs to suppport DHCP and basic firewalling. No other features are required. Further, the reports just need to show overall trends. It is not necessary to show traffic by IP, by protocol/application, or by time of day. They just need an overall week to week, month to month, trend line. I'm familiar with MRTG/PRTG/tools that collect SNMP data from the router, but the libraries don't have the expertise for the configuration. I've considered installing the tomato firmware on some cheap home/home office routers, but if there's a commercial product that can be purchased that would be significantly simpler. Also the library boards would be much more likely to approve the purchase of a commercial product over a 'hacked' one. Any assistance would be appreciated.

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• How to prevent getting infected by rogue security applications

  - by Ieyasu Sawada

  My computer never got infected with a virus before, because I'm using Web of Trust browser plugin, sandboxie and Avast Free antivirus. But today, it got infected with a rogue security application called antivirus.net. I have already removed it using MBAM, SAS, and Kaspersky Virus Removal Tool. And by the way, I was using MSE when my laptop got infected. Seems like the rogue application just killed off the MSE process. And I never even got a warning. I was using the wi-fi from our school, which I think is the cause since most of the computers in our laboratory has rogue applications on it. My question is, how do I prevent this from happening again? It took me about 6 hours to disinfect my computer and I don't want it to happen again. Please enlighten me if these rogue applications really just pop out of nowhere. Note I'm not dumb enough to agree with installing rogue security applications. It just came out of nowhere. I'm happy with MSE, well not after it let antivirus.net penetrate my computer. I've done a little bit of research and it says that it needs the permission of the user to actually install it in the computer: http://www.net-security.org/malware_news.php?id=1245 http://en.wikipedia.org/wiki/Rogue_security_software Is it possible that other computers in our school network have agreed to install those? Or maybe the network admin?

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• Why does just splitting an Ethernet cable not work?

  - by Sin Jeong-hun

  I thought the Ethernet is logically a one-line communication bus (for argument's sake, I am excluding hubs). All machines attached on the bus hears the same signals and the machines themselves try to avoid collisions by randomly backing off. http://computer.howstuffworks.com/ethernet6.htm If so, why would splitting one Ethernet line from my home router into two and connecting two computers not work? Why do I have to add a switch to it? *What the Internet said would not work. [4 port home router] ------[one Ethernet cable]-----[simple splitter]======[two computers] *What the Internet said I should do [4 port home router] ------[one Ethernet cable]-----[switch]======[two computers] Is this because of the signal degradation (reduced electric current)? Thank you for all the answers! The reason why I did not just use the two ports of my home router is... The 4-port gigabit router is in my room, and I had put a computer in another room (also my room, though). Since a wired network is far more reliable and secure, I had bought a long Ethernet cable and and connected the computer to the router. Now I was thinking about adding another computer to that room. I could buy another long Ethernet cable, but then there will be two cables between the rooms. The one line already is a minor annoyance, so I thought if I could share the one line between the two computers in that room. A switch would work, but it requires power and is a little bit pricey. That is why I wondered why it would not work to simply split the physical Ethernet cable. Apparently I do not completely understand how Ethernet and a switch work. I just have some bit of knowledge I heard in my college class.

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• Problems starting autossh on boot [ubuntu]

  - by Ken

  I'm trying to automatically start an SSH tunnel to my server on boot from a ubuntu box. I have an ubuntu box that's mounted on an 18-wheeler and is networked behind an air card. The box hosts a mysql database that i'm trying to have replicated when the aircard is connected. As I can never be sure of my IP and how many or which routers I'm behind I'm connected to my replication server with an SSH tunnel. I got that working using the following command: ssh -R 3307:localhost:3307 [email protected] Now I'd like that to start whenever the box is, and be alive all the time, so I installed auto-ssh and setup this little script: ID=xkenneth HOST=erdosmiller.com AUTOSSH_POLL=15 AUTOSSH_PORT=20000 AUTOSSH_GATETIME=30 AUTOSSH_DEBUG=yes AUTOSSH_PATH=/usr/bin/ssh export AUTOSSH_POLL AUTOSSH_DEBUG AUTOSSH_PATH AUTOSSH_GATETIME AUTOSSH_PORT autossh -2 -fN -M 20000 -R 3307:localhost:3306 ${ID}@${HOST} I've tried putting this scrip in /etc/init.d/ and using a post-up command in /etc/network/interfaces as well as putting it in /etc/network/if-up.d/. In both situations the script starts on boot, but the tunnel doesn't appear to be correctly established. The script works when run manually.

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• Network Explorer Intermittently Fails to Display all Computers in Work Group

  - by graf_ignotiev

  I run a small computer lab of 10 computers and occasionally, when using the network explorer (a.k.a Network Browser) some or all of the remote computers will fail to appear. If I try to access a remote computer by its name I get an unspecified error (code 0x80004005), but I am still able to access it with the computer's IP address. The strangest part is that the problem will inexplicably go away after waiting awhile. Each computer is running Windows 7 x64 Enterprise and has identical hardware, software and configuration. They are all on the same subnet and in the same workgroup. I've spent days researching the problem and have tried the following solutions: Updated the BIOS, chipset and network adapter drivers Changed Power Settings in Network Adapter Properties so that the computer will not turn it off Disabled the Computer Browser service Changed the DHCP node type to broadcast Reviewed the Event Viewer logs Steps 3 and 4 have seemed to help the problem a little bit, but not completely. I'm beginning to suspect that the problem might lie with our router which is a ZyXEL ZyWALL 2WG, as the packets sent by Network Discovery may not be returning in time, but I wanted to get some perspective in the issue before I went any further.

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• Mac Mail sent messages not in sent folder

  - by Elizabeth Akers

  Hi. My powerbook G4 has been lobbying for a furlough recently, and its latest prank is to not show sent messages in my sent mailbox. I have always had a copy of every sent message, and now, for some unknown reason, I can only see sent messages from May 7 and earlier. When I did a test, and sent myself an email, it shows up fine in my inbox, but there's nothing in the sent folder. Weird. It also has the little arrow next to messages that I replied to in the inbox. I guess I'm going to have to cc myself on everything until I get this fixed. Also, it's got another new trick, which I'm assuming is unrelated, but I mention it here just in case it is: the battery says it's "good" and has a cycle count of 0, and a full charge capacity of 2139, but for some reason it's all of a sudden not charging when it's plugged in. It works fine when connected to the wall, but there is no battery life at all. Zip. Any thoughts? Is it just time for a new 'book? This one just got back from Apple, having its harddrive replaced for the fourth time (for free, but seriously, this thing is a lemon). Thanks so much, Elizabeth

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• Cisco Multi-DMZ firewall

  - by BParker

  I need to find a firewall that will give me 1 LAN port, and 5-7 DMZ ports. I have a requirement to replace some FreeBSD systems that are used to run some testing equipment. It is essential that the DMZ ports cannot communicate with each other, but the LAN port can communicate with everyone. That way a user on the LAN can connect to the test systems, but the test systems are isolated entirely and cannot interfere with each other. One of the DMZ's will be connected to a VMWare ESXi server, one to a standard server, and the rest to various types of equipment. The lan port will be connected to the corporate LAN switch. Sorry if i am a little vague, I am just trying to work all this out myself! Currently we have a FreeBSD configured, but the quad port NIC's are pretty expensive, and the PC itself is old, so i would prefer to replace it with a dedicate piece of kit which can do the same job, but more reliably! These test rigs are used all over the place, and get moved quite often, so i am aiming for Cisco kit for ease of configuration and reliability of the hardware itself. Thanks

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• SQL Server Installation: Is it 32 or 64 bit?

  - by CapBBeard

  Recently I was performing an OS upgrade on one of our DB servers, moving from Server 2003 to Server 2008. The DBMS is SQL Server 2005. While reinstalling SQL on the new Windows installation, I went to another of our DB servers to verify a couple of settings. Now, I always thought this second server was Server 2003 x64 + SQL 2005 x64 (from what I'd been told), but I now have my doubts about this. I now suspect that it is in fact only 32 bit SQL, however I'd like to verify this. Here's some details: The OS is definitely 64 bit. xp_msver shows Platform as NT INTEL X86 SELECT @@VERSION shows Microsoft SQL Server 2005 - 9.00.4035.00 (Intel X86)... However sqlservr.exe is not shown with '* 32' in taskmgr, does anyone know why this is the case, if it is in fact 32 bit as claimed? Despite this, it does seem to be running out of the x86 program files folder. If I do the same checks on a confirmed 64 bit installation, it does give back the expected 64 bit readings, which can only prove that this server in question is only running in 32 bit. Now, that being the case, the question arises about how much memory this '32 bit' install can use. Task manager reports about 3.5GB memory usage for sqlservr.exe (The server has 16GB physical). I suspect that AWE has not been configured at all, and therefore the server will be significantly under-utilised (remembering that the OS is 64 bit) if SQL is simply using a 32bit address space. Is this assumption correct? I feel the server should have SQL reinstalled as 64 bit in order to fully utilise the hardware platform, however it is currently heavily in production; this will be no easy task. I suspect we may just have to configure AWE correctly and let it be for the time being (Unless this is a bad idea?). I apologise that this question is a little vague/lost; I'm no SQL expert, just trying to get a handle on what's going on here.

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• Mod_rewrite (CakePHP routing functionality) forbidden after Snow Leopard upgrade

  - by Ryan Ballantyne

  Hello ServerFault, I am using the standard Apple-provided installations of PHP 5.3 and Apache 2 to do web development on a Mac Pro that I just upgraded to Mac OS X 10.6 (Snow Leopard). The upgrade went well enough, if I ignore the fact that it destroyed my ability to get work done. ;) After the update, the CakePHP application I was developing started giving me 403 Forbidden errors when accessed. Based on the errors in the log file, I've determined that Apache is choking on the mod_rewrite rules in Cake's .htaccess file. Here's the file, in its entirety: <IfModule mod_rewrite.c> RewriteEngine on RewriteRule ^$ app/webroot/ [L] RewriteRule (.*) app/webroot/$1 [L] </IfModule> It's not that the rules themselves are wrong, but that Apache is forbidding the use of mod_rewrite altogether. All other pages on the machine work fine, and the 403 errors go away if I comment out the .htaccess file (but nothing works, of course). In my httpd.conf file, I've tried changing this: <Directory /> Options FollowSymLinks AllowOverride None Order deny,allow Deny from all </Directory> To this: <Directory /> Options FollowSymLinks AllowOverride All Order deny,allow Allow from all </Directory> ...which has no effect. I don't know much about Apache configuration files, and I'm quite stuck on this. In fact, I know little enough that I'm not sure which information about my setup is needed to enable people to provide useful answers. I'm just using the vanilla OS X setup, nothing fancy. Googling has yielded no fruits for me this time, so I'm turning to you. Any ideas?

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