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• Reducing video mode switching during Linux boot

  - by Zack

  When I boot up my desktop computer, which only has Linux on it, the video mode and/or console font gets switched four times: When GRUB starts, it switches from 80x25 text to a graphical mode so it can draw a pretty background behind its menu; GRUB then goes back to 80x25 text after I pick something from the menu; When the KMS driver for my video card loads, it switches to a much higher-resolution text mode (I don't know if this is a hardware text mode or not); Finally X starts and it goes graphics and stays that way. I think this last switch does not change the resolution of the video mode, only the graphicalness. I'd like to get rid of as many of these mode switches as possible. Ideally, when GRUB takes over from the BIOS it would go directly to the same high-resolution text mode that the KMS driver selects, and the display would stay in that mode till X starts and brings up graphics. I am under the impression that this is possible by mucking with the kernel command line and/or the GRUB console module load parameters, but I don't know the details. GRUB 1.98+20100706, kernel 2.6.32.15 using Nouveau video drivers. Distro is Debian unstable. Please no answers that involve recompiling anything or cobbling together bleeding-edge kernel/driver combinations, I don't care enough about this to go to that much trouble. EDIT: Tobu suggests setting GRUB_GFXMODE to the full pixel resolution of the monitor, and GRUB_GFXPAYLOAD_LINUX=keep to avoid the mode switch after the menu goes away. This does part of what I want, but winds up being worse overall. There's no mode switch after the menu, but there's still a painfully-slow screen repaint (I should probably just give up on GRUB's gfxmode, it's waaaay too slow at 1920x1200). More seriously, there's now a double mode switch when nouveaufb loads, along with fun-looking error messages in dmesg [ 5.923798] [drm] nouveau 0000:02:00.0: allocated 1920x1200 fb: 0x40250000, bo ffff8801ba5f4600 [ 5.923802] fb: conflicting fb hw usage nouveaufb vs EFI VGA - removing generic driver [ 5.923821] [drm] nouveau 0000:02:00.0: PFIFO_INTR 0x00000010 - Ch 1 ("PFIFO_INTR" message repeats 400+ times) [ 5.925609] Console: switching to colour dummy device 80x25 [ 5.925802] Console: switching to colour frame buffer device 240x75

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• Campus VLAN Segmentation - By OS?

  - by Moduspwnens

  We've been thinking through re-arranging our network and VLAN configuration. Here's the situation. We already have our servers, VoIP phones, and printers on their own VLANs, but our problem lies with end user devices. There are just too many to lump on the same VLAN without being hammered with broadcasts! Our current segmentation strategy has them split into VLANs like this: Student iPads Staff iPads Student Macbooks Staff Macbooks Gaming devices Staff (Other) Student (Other) *Note that our network has many more iPads and MacBooks than most. Since the primary reason we're splitting them is just to put them in smaller groups, this has been working for us (for the most part). However, this required our staff to maintain access control lists (MAC addresses) of all devices belonging in these groups. It also has the unfortunate side effect of illogically grouping broadcast traffic. For example, using this setup, students on opposite ends of campus using iPads will share broadcasts, but two devices belonging to the same user (in the same room) will likely be on completely separate VLANs. I feel like there must be a better way of doing this. I've done a lot of research and I'm having trouble finding instances of this kind of segmentation being recommended. The feedback on the most relevant SO question seems to point toward VLAN segmentation by building/physical location. I feel like that makes sense because logically, at least among miscellaneous end users, broadcasts will typically be intended for nearby devices. Are there other campuses/large-scale networks out there segmenting VLANs based on end-system OS? Is this a typical configuration? Would VLAN segmentation based on physical location (or some other criteria) be more effective? EDIT: I've been told that we will soon be able to dynamically determine device OS without maintaining access lists, although I'm not sure how much that affects the answers to the questions.

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• Vanishing Windows Desktop Shortcut Keys

  - by Henry Keiter

  The Situation Like you, I have many applications that I like to open. I've set up keyboard shortcuts for the most common, by placing a link on the desktop and setting its Shortcut Key property: This is all fine and dandy, most of the time. When I want to bring up the GIMP, I press Ctrl+Alt+G and the GIMP launches. Lovely. The Problem Sometimes--perhaps once a month per desktop shortcut--the shortcut key assignment simply vanishes. I press Ctrl+Alt+G and nothing happens, so I go check the shortcut and see that lo and behold: nothing is there. This happens regularly to all my shortcuts (not all at once). It doesn't matter what keys I assign, and there doesn't seem to be any correlation with particular applications being open or anything of that sort. This has happened on every Windows XP machine I've ever used with any regularity. Obviously what makes this issue particularly obnoxious is that it's not easily reproducible. I have searched long and hard for a solution for (or at least acknowledgement of) this problem, to no avail, so hopefully you guys know something that I don't. I did find this question, where the answers are all basically "use a third-party app", but as far as I could tell that was a slightly different issue, related to Explorer being busy. If the solution for this turns out to be the same, fine, but I'd prefer a native fix if at all possible. Note: I've tagged this with Windows in general because I seem to remember it happening on Windows 7 as well as XP, but I rarely notice it because I use the start-menu search in preference to desktop shortcuts.

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• Performance: Nginx SSL slowness or just SSL slowness in general?

  - by Mauvis Ledford

  I have an Amazon Web Services setup with an Apache instance behind Nginx with Nginx handling SSL and serving everything but the .php pages. In my ApacheBench tests I'm seeing this for my most expensive API call (which cache via Memcached): 100 concurrent calls to API call (http): 115ms (median) 260ms (max) 100 concurrent calls to API call (https): 6.1s (median) 11.9s (max) I've done a bit of research, disabled the most expensive SSL ciphers and enabled SSL caching (I know it doesn't help in this particular test.) Can you tell me why my SSL is taking so long? I've set up a massive EC2 server with 8CPUs and even applying consistent load to it only brings it up to 50% total CPU. I have 8 Nginx workers set and a bunch of Apache. Currently this whole setup is on one EC2 box but I plan to split it up and load balance it. There have been a few questions on this topic but none of those answers (disable expensive ciphers, cache ssl, seem to do anything.) Sample results below: $ ab -k -n 100 -c 100 https://URL This is ApacheBench, Version 2.3 <$Revision: 655654 $> Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/ Licensed to The Apache Software Foundation, http://www.apache.org/ Benchmarking URL.com (be patient).....done Server Software: nginx/1.0.15 Server Hostname: URL.com Server Port: 443 SSL/TLS Protocol: TLSv1/SSLv3,AES256-SHA,2048,256 Document Path: /PATH Document Length: 73142 bytes Concurrency Level: 100 Time taken for tests: 12.204 seconds Complete requests: 100 Failed requests: 0 Write errors: 0 Keep-Alive requests: 0 Total transferred: 7351097 bytes HTML transferred: 7314200 bytes Requests per second: 8.19 [#/sec] (mean) Time per request: 12203.589 [ms] (mean) Time per request: 122.036 [ms] (mean, across all concurrent requests) Transfer rate: 588.25 [Kbytes/sec] received Connection Times (ms) min mean[+/-sd] median max Connect: 65 168 64.1 162 268 Processing: 385 6096 3438.6 6199 11928 Waiting: 379 6091 3438.5 6194 11923 Total: 449 6264 3476.4 6323 12196 Percentage of the requests served within a certain time (ms) 50% 6323 66% 8244 75% 9321 80% 9919 90% 11119 95% 11720 98% 12076 99% 12196 100% 12196 (longest request)

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• Unable to remove Read-Only attribute from folder in Windows XP

  - by elcuco

  I have this directory which I cannot remove the read only attribute from. The computer is running XP SP2 (or SP3, not sure) and the directory sits in a NTFS file system. Looking into the web I found this: http://support.microsoft.com/kb/256614 which tells that if the directory is "customized" it's treated as a system folder and thus "read only". I don't think this is a scenario in my case, but anyway it's not helping, their recommendation is more or less: attr -r -s /d /s d:\data and this is not working for me. Any other ideas? More info: The directory is served to an HTTP server (wamp) and the directory is an SVN check out. What happens is that the web server cannot write files into the directory (imagechace from drupal is you are really interested). Edit 2: The original post claimed that the directory sits on a VFAT FS, however I booted Fedora 11 from livecd and the partition is marked as NTFS. Edit 3: I left the company which I worked on, on which this situation happened... so I cannot fully close this question. But things get even worse: I tested the "attr -r" answer I put, it did not work for me, and now the developer said that it worked for her. A nice WTF moment. Probably a reboot helped... Sorry for loosing details. If anyone has the same problem, and one of the answers helps him - please comment.

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• Why does the screen resolution of 1440x900 suddenly disappear from Intel GMA Control Panel?

  - by GeneQ

  I'm using a Vostro 1200 laptop with the Mobile Intel(R) 965 Express Chipset powering its graphics and running Vista 32-bit SP2. I've been using the Vostro with a Dell SE198WFP LCD Monitor as the external display since day one for about two years without any problems. Recently, I plugged the Vostro into a couple of other monitors. The problem is, now the native resolution for my main monitor's (the SE198WFP) resolution of 1440x900 @ 60 Hz is no longer available. (See below) I've tried everything from uninstalling and reinstalling the Intel drivers as well as the monitor drivers to no avail. I've goggled this problem and it appears that this has happened to other people but all the answers involve people giving up in frustration or reinstalling; both terrible outcomes. Has anybody ever figured why this happens and have a good solution? UPDATE: This dude has a complicated solution, which I haven't tried yet. His explanations for the problem was After an exausting search for an answer to the matter of why my brand new 19? widescreen monitor’s native resolution (1440×900) was unavailible (sic) in the display properties, I finally stumbled upon an article a person posted on Intel’s forums that basically explained what shannanigans Intel had been up to with their GMA 950 line of onboard graphic solutions. Not very comforting.

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• Login with Enterprise Principal Name using sssd AD backend in Ubuntu 14.04 LTS

  - by Vinícius Ferrão

  I’m running sssd version 1.11 with the AD backend in Ubuntu 14.04 LTS (1.11.5-1ubuntu3) to authenticate users from Active Directory running on Windows Server 2012 R2, and I’m trying to achieve logins with the User Principal Name for all users of the domain. But the UPN are always Enterprise Principal Names. Let-me illustrate the problem with my user account: Domain: local.example.com sAMAccountName: ferrao UPN: [email protected] (there’s no local in the UPN) I can successfully login with the sAMAccountName atribute, which is fine, but I can’t login with [email protected] which is my UPN. The optimum solution for me is to allow logins from sAMAccountName and the UPN (User Principal Name). If’s not possible, the UPN should be the right way instead of the sAMAccountName. Another annoyance is the homedir pattern with those options in sssd.conf: default_shell = /bin/bash fallback_homedir = /home/%d/%u What I would like to achieve is separated home directories from the EPN. For example: /home/example.com/user /home/whatever.example.com/user But with this pattern I can’t map the way I would like to do. I’ve looked through man pages and was unable to find any answers for this issues. Thanks,

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• How can I know if a replacement display is compatible with my laptop?

  - by moraleida

  I have an Acer Aspire 4810TZ from 2010 which I truly love - it's a 3 year old notebook that still carries on for about 5 to 6h straight off the battery. I've also invested in it with an SSD and extra RAM and it's fine for my use right now. I'd really rather not just dump it. Now... its screen is dead and I'm looking for replacement parts, but it turns out to be a kind of expensive display - AUO B140XW02 14" LED. US$ 125 was the cheapest I found here (Rio de Janeiro, Brazil). The official dealer sells them for US$ 175. I'm aware of How do I know if a LCD is compatible with my Laptop? and Can I replace a laptop screen with one of a different resolution? but the answers don't really help me in this case. Also Replacing an LCD screen in a laptop gives me a hint but I'm completely dumb at hardware so this is why i'm asking: Is it possible to buy an LCD or a lower grade LED screen with the same connectors? What characteristics should I look for to find out if a certain display is compatible?

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• The Server Fault Wiki of recommended practices [migrated]

  - by Avery Payne

  So I've noticed that there are several recommendations on basic practices on Server Fault, but there doesn't seem to be a cohesive view as to how those recommendations would all fit together. So I thought I would lump these together as a kind of mental exercise to see what the "ServerFault Community IT Department" would look like if it were implemented. This would give a few things: it would make a reasonable wiki (in the true wiki spirit of many contributions), it would provide several links to well-vetted practices, and it would be kind of fun to see what the amalgamation would look like. And who knows, it may even point out some interesting issues between different forms of "best practices", although I would be stunned if there was a conflict hidden in there someplace... Add your favorites from Server Fault as answers, and I'll re-edit this section with the results. Here's a few catagories to collect different ideas together. Hardware Configuration(s) Server room configuration. Server room temperature Firmware Updates and Scheduling Storage Configuration(s) Selecting a NAS box Linux: Dealing with /tmp Linux: Install apps in /var or /opt? Network Configuration(s) checking DNS health and compliance Security Practice(s) Password (General) Best Practices Password sharing methods Windows Update Updating Windows Servers that are hosts for VMs Network Service(s) User Service(s) User Naming & Deletion Upgrade Process(es) Disaster Recovery Checking Backups Documenting an outage for a post-mortem review Last Edit: 2010-02-17

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• Computer makes hissing noise, turns off after few seconds

  - by Kaustubh P

  I have a problem similar to the questions posted here and here. This is my config: Asus M3N78-EM, with AMD Phenom X3 720 2800 Black Edition, 4GB Transcend DDR2 RAM, Nvidia 9400GT. HD is a 160 GB IDE, and a LG IDE DVD-ROM. The power button is a bit off, I have removed the cover of the switch, and the only way it turns on is just giving the "stick" under the cover a gentle press. It turns on sometimes, and at other times, I have to cut-off the power from the PSU, and try again. I will describe my problem in as detail as possible, please bear with me: The problem has started in the last week, a few months after I changed the to the powerswitch arrangement as described above. The PC makes a hissing noise, and I wasn't able to pin-point the noise source, because of the various other fans. At first, removing the HD, rebooting w/o the HD, turning it off, reconnecting and booting made the problem go away. But of late, it doesn't happen. As suggested in the other questions, I tried reducing the load by disconnecting both the IDE drives, and the problem (noise + turn-off) still occurs. I also connected another 80G IDE HD,today morning, adn it still made that noise, and turned off. I also opened up the PSU, but I couldn't see any fault in that, I tried rotating the fan by blowing into the blades, and with my fingers, but the hissing noise didn't come from there. Or maybe the speed wasn't enough to evoke that noise. A few weeks ago: I had cleaned the Cabinet and had repasted the processor and its fan using some thermal paste. Could that be at fault? I also used a vacuum to blow the dust out of the PSU, could the power have been too much, to maybe offset the fan or something? A label on the PSU says it uses a ball-bearing fan. That only leaves me with the Processor fan and the processor itself. I didn't try removing the processor fan and processor from the motherboard, and then turning the PC on, fearing damage. Will doing so cause any damage? What can I do to localize and pin-point the problem? Also, after a few tries, the Computer starts up. Sometimes it turns of within 2 seconds, sometimes after the POST. Once it turned off at the grub. Another time it booted completely and then turned off. The only way to ensure that the PC wont turn off, is if the hissing noise stops. EDIT: I suspect it to be the Processor/Processor fan, owing to the source of noise. All the config, except for the Cabinet, is just over a year old. EDIT2: I also just remembered, that I had set the "On-power resume" to turn on, i.e. If I supply he PC with power, it will turn itself on, w/o me needing to press the switch. I had done that to workaround the faulty power-switch, as noted above. EDIT3: I calculated the power my system needs, from the antec site, and I just arrived at 292W

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• Network to network VPN Centos 5

  - by Atul Kulkarni

  I am trying to follow "http://www.centos.org/docs/5/html/Deployment_Guide-en-US/ch-vpn.html#s1-ipsec-net2net" I have come up with the following On local router machine: in my ifcfg-ipsec0: ONBOOT=yes IKE_METHOD=PSK DSTGW=10.5.27.1 SRCGW=10.6.159.1 DSTNET=10.5.27.0/25 SRCNET=10.6.159.0/24 DST=205.X.X.X TYPE=IPSEC I have /etc/sysconfig/network-scripts/keys-ipsec0 file in place. On Remote Machine in the cloud if have /etc/sysconfig/network-scripts/ifcfg-ipsec1: TYPE=IPSEC ONBOOT=yes IKE_METHOD=PSK SRCGW=10.5.27.1 DSTGW=10.6.159.1 SRCNET=10.5.27.124/25 DSTNET=10.6.159.0/24 DST=38.x.x.x with its respective /etc/sysconfig/network-scripts/key-ipsec1 file. The DST in both cases are NAT'd external IPs. Is that a problem? I have made changes for port forwarding as well. When I try to bring the interfaces up it gives me output "RTNETLINK answers: Invalid argument". I am confused now and don't know what more to do? Any place I can digup what parameters were wrong? I really appreciate any help I can get. Thanks and Regards, Atul.

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• Two parts: linux startup script to connect to bluetooth and cron to keep it connected

  - by D.R.

  I have a mini bluetooth keyboard and a Raspberry Pi running a Debian-based distro. I know the MAC address of the keyboard but for this question, let's just use AA:BB:CC:DD:EE:FF. Right now I have to have a wired keyboard connected as well as my bluetooth dongle for the mini-keyboard and on the wired keyboard, I have to run the following when the device boots up: sudo hidd --connect AA:BB:CC:DD:EE:FF If the device goes idle for too long, then the bluetooth disconnects and I have to pull out my wired keyboard and retype that same command. What I'm looking for it a way to have that command run at startup and a way to sense if it gets disconnected so that it will auto reconnect. The annoying thing is that they keyboard has to be in pairing mode (even though it has already been paired) when I run that command, otherwise it tells me the host is down. So perhaps the script needs to prevent it from disconnecting due to inactivity, otherwise I'll have to put it back in pairing mode to reconnect. So to recap: - A script to connect at startup (I can make sure to put the keyboard into pairing mode before turning it on) - A script to prevent it from disconnecting (maybe some sort of signal to send to it every 60 seconds or something?) Any help with this is greatly appreciated! StackOverflow is always the best place to find answers to weird questions! I've been searching long and hard for an answer, but finally had to resort to coming here! Thanks!

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• What is the best way/Software to manage multiple short lived instances of virtual machines ?

  - by Newtopian

  Hi, We have a QA department that have to test our software on multiple combination of OS and DMBS. With Windows spewing out many different versions the combinatorial math of all this can be daunting. So we decided on visualizing our setups but so far it only displaces the problem. The cost of hardware is expensive and we need many different combination far exceeding your server capacity to deliver. Also, these instances are throw away, once the test is complete we no longer need it, furthermore to ensure proper test isolation we should start fresh from a new instance. Lastly we only need a small subset of these system online at any given time. What I am looking for is a way to manage inventory so that our QA staff can order instances to be put online as required and discarded once used. Instances are spawned from a pool of freshly installed systems with the appropriate combination ready to accept our software. It also should be possible for two or more people to start the same instance at the same time, though we could manage without this if it proves too complex to put in place. Finally our budget is pretty thin, we can probably make some purchases but ideally expenditures should be kept to a minimum. To summarize we should be able to : Bring instances online on demand. Ideally should offer queue and scheduling management Destroy instances on demand Keep masters in inventory but not online. Manage large inventory of VMs (30-100 maybe more) with small staff of users (5-10). Allow adding, deleting and changing instances from inventory (bring online, make changes and check back in, or create new and check in). Allow few long lived instances for support tools (normal VM server usage) Thanks for your answers

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• How to crop Screen Recordings under Snow Leopard?

  - by willc2

  Quicktime Player for Snow Leopard now allows you record the screen. Awesome! Once you have a movie it will let you trim screen recordings for length. Is there a way to crop the movie's dimensions, either in QT or using some built-in or free software? Update: How to crop to an arbitrary size and aspect ratio? iMovie only seems to let you crop to the aspect ratio of the containing project. Result: Both good answers but since I have QuickTime Player 7 and Photoshop, that's the workflow I choose as the answer. NOTE: If you have Photoshop Extended, you can import a movie, use the crop tool, and Export the cropped movie. Not free or built-in, but convenient. To summarize the instructions from the video link ricbax posted: Open movie in QuickTime Player 7 Copy a frame and Paste it into a new document in Photoshop Draw a rectangular selection around the area to keep and fill with black Invert the selection and fill with white Save as .GIF, with 2 colors Back in QuickTime Player 7, open Movie Properties window Select the Video Track Select the Visual Settings Tab Drag and Drop the 2-color .GIF file onto the Mask drop area (or use choose file button) Export the (now cropped) movie DONE

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• Mouse receiver stopped working after pairing mouse to an unifying receiver

  - by mp19uy

  I bought this mouse, logitech m510, which came with a nano receiver (no-unifying). Yes I know, the mouse is supposed to come with a unifying receiver but I bought it knowing that it won't come on it's original package and it will come with a no-unifying receiver. When I received it, everything worked ok but, after connecting the mouse to another computer using an unifying receiver (that also worked ok, btw), then, when I tried to connect back the mouse to my computer using the no-unifying receiver, I couldn't connect it. I tried everything from removing the batteries and reinstalling the drivers to restarting the computer and trying in different computers, but I couldn't connect them. What I think it happened, is that in fact if you check the documentation of the logitech m510 it says that it works with unifying receivers only, and even more, there is the following article explaining it: http://logitech-en-amr.custhelp.com/app/answers/detail/a_id/18001/~/using-my-m510-with-a-different-usb-receiver So my theory is that the problem was connecting it to a unifying receiver, and now, isn't recognize by another receiver. The receiver (the no-unifying one) itself is recognized by windows, and if I connect the mouse using a unifying receiver, it works. I would like to know if there is any know solution for this or if I can try something else to see if I can solve this.

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• How to get german QWERTY on Windows?

  - by Arturas M

  Well I'm used to having the world standard keyboard which is qwerty and not qwertz... But on windows I can't find the choice for german input which would be qwerty, not qwertz. In linux there was german input with qwerty so it was fun. I believe it should be on Windows too? Cause i'm sick of this qwertz always having to correct and search for z or y... Yeah, I know, if Germans made a mistake, it wasn't loosing WW2... Edit: Maybe I wasn't clear enough, it's not about changing between different language inputs? It's about having all german keys in german input, just the z and y would be in the correct places like all the worlds keyboards use and like the US keyboard uses... Solution: Well unfortunately by searching everywhere and waiting for answers I couldn't find what I needed, so I came up with this solution - I used The The Microsoft Keyboard Layout Creator And created my own very custom layout by modifying the default german layout and switching places of z and y. In case somebody needs it and doesn't want to go the hard way, I decided to upload them, so here are the links to download and install the keyboard layout: http://www20.zippyshare.com/v/95071447/file.html http://rapidshare.com/files/3822150342/German%20QWERTY%202%20by%20Arturas%20M.zip It will appear as a choice under German input between languages in your language bar. If you just want to use this german layout, just remove all german layouts and install this one. Good luck and have fun using it!

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• Apache crashes every 5min

  - by Simon

  I'm relatively new to server issues, having a site of mine that I started early in the year grow beyond my capabilities of managing it. I need help. I recently moved out of my shared hosting environment onto a dedicated virtual server from Mediatemple. Each week, I run a script that fetches data from my DB, fetches data from last.fm's API and then tweets information to Twitter. My server uses Virtuozzo and when the script runs, Apache crashes every 5min. I checked and saw that the 'kmemsize' parameter reaches its cap (its 13mb). I realise my problem. The MySQL process stays open for long while Apache needs to handle lots of incoming links (about 200 000 pageviews for that day according to my previous host's AWSTATS). Yes, I'm quite unexperienced in this, and I'm clearly killing the server with too many incoming links while it has to manage the updating of the DB. So that is the precedent: I want a few answers. 1) Why did my shared hosting environment not crash apache every 5min? It ran fine, the site only slowed a lot. Clearly, it must be the virtual container and the kmemsize limit? 2) Where do I go from here? Would a physical server (not a virtual container) encounter the same problems? I sent a support request to Mediatemple as well. I need all the help I can get.

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• Windows 7 task bar stuck in hiding, how to fix?

  - by Rainer Blome

  In Windows 7, I use the "Auto-hide the task bar" feature. Usually, it works fine: As soon as the pointer touches the screen bottom, the task bar pops up. However sometimes, it refuses to rise. Pressing the "Windows" key (or Ctrl-ESC) makes the start menu appear, forcing the task bar from hinding as well. Once I've done this, the task-bar auto-rises again. This is annoying, it interrupts flow. Has anyone else noticed this? How do I avoid this? Searching for "Windows 7 task bar auto-raise" shows that at least one other person experienced this problem: http://answers.microsoft.com/en-us/windows/forum/windows_7-desktop/how-can-i-fix-the-taskbars-auto-hide/8cdf6369-7354-4d29-9249-b7096ed0e28b?msgId=6dac3361-9d0f-4a9e-8642-b91a72826ba4 To answer the question posed by the "helpful" support engineer on the above page, of course I am running some apps when this happens, usually Explorer, Firefox, Eclipse, Cygwin/X, Xterm, Emacs, Notes, VPN client, Firewall. If my memory serves correctly, I have seen this behavior on earlier versions of Windows as well, XP at least. To reproduce this behavior, I tried switching between apps, and bringing apps to open other windows. I am unable to reproduce this behavior so far. So far, it appears to happen out of the blue, sometimes multiple times a day. Looks like a bug to me. The task bar should raise no matter what.

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• How do I fix Internet Explorer / Firefox differences in Oracle JD Edwards Enterprise?

  - by CT

  Our company uses Oracle's JD Edwards Enterprise to do accounting work. We have an application consultant working for us to just deal JD Edwards but he is of non-technical background so only helps in application-specific support. All of our users should use IE 7 for JDE. About 15-20% of those users have problems which cause them to not be able to use IE 7. So those problematic users use firefox. For the most part firefox works fine but there are a few issues. Some menus / options within JDE that are present in IE 7 are not present in firefox. If I could get all of our users working under IE 7, all the firefox issues would be mute points. I have cross referenced Internet Options settings from a working IE 7 user and a non-working IE 7 user. All settings seem to be mirrored. I'm not sure how to go about continuing to troubleshoot this issue. So not only answers but just suggestive ideas for attack would be appreciated. Thanks

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• Multiple static WAN IP addresses to single LAN subnet

  - by Jessy Houle

  Below is my home network topology. I currently have 5 static IP addresses, 3 of which are in use by 3 routers. These routers in-turn subnet internal networks and port forward. I use my SSL VPN appliance to remote home from work or on the road. At this point I can remotely administer my Windows Server. I know the network is setup wrong, I was matching existing hardware the best I knew how. http://storage.jessyhoule.com.s3.amazonaws.com/network_topology.jpg Ok this said, here is the problem... One of my websites on my Windows Server now needs to be secure (SSL using port 443). However, I'm already port forwarding port 443 to my VPN appliance. Furthermore, if I'm going to have to reconfigure the network, I would really like to be able to use the SSL VPN to remotely administer all machines. I mentioned this to a friend of mine, who said that what I was looking for was a firewall. Explaining that a firewall would take in multiple static (WAN) IP addresses, and still allow all internal devices to be on the same network. So, basically, I could supply my SSL VPN appliance it's very own static (WAN) IP address routing, and yet have it on the same internal network (192.168.1.x) as all my other devices. The first question is... Does this sound right? Secondly, would you suggest anything different? And, finally, what is the cheapest way to do this? I am started down the road of downloading/installing untangle and smoothwall to see if they will do the job, hoping they take multiple static (WAN) IP addresses. Thank you in advance for your answers. -Jessy Houle

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• PC only boots from Linux-based media and won't boot from DOS-based media

  - by Xolstice

  I have this problem where the PC only seems to boot from a floppy disk or CD if it was created as a Linux-based bootable media. If it was created as a DOS-based bootable media the system just freezes at the starting point of the boot process. I originally asked this under question 139515 for CD booting only, and based on the given answers, I was under the impression the problem was with the CD-ROM drive; however, I have since installed a newly purchased CD-ROM drive and the same freezing occurs. This then made me try the DOS bootable floppy disk approach and I was quite surprised that it exhibited the same freezing problem. I then tried try a Linux bootable floppy and everything booted from it without any issues. As I mentioned in my original question, the PC was booting just fine from the DOS-based bootable CD, and then it suddenly decides to pull this freezing stunt. I can't remember if I changed anything in the BIOS settings that may I have caused the problem, but I am wondering if that could be the case - it is currently using the Award Module BIOS v4.60PGMA. Can anyone help?

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• Setup 2003 R2 Radius server to work on vista/seven

  - by Fox

  Hi All, I'm currently trying to configure my 2003 R2 server RADIUS module to enable WIFI client to authenticate throught my Active Directory. The RADIUS server use MS-CHAP V2 as encryption method. I got several Access Point running DD-WRT, configured to use WPA2-Enterprise security that use Radius Server. Everything is setup, and almost working. When I say almost working, I mean, I can login using my AD Credential on my IPod or even on a MacBook running OS X, Windows XP also work with some little tweak in connection properties. The problem is Windows Vista or Windows Seven clients computers that are not inside domain. It doesn't work at all, it doesn't even prompt for user/password/domain. I already install the patch for IAS to make the certsrv compatible with Vista and Seven, but still doesn't work. Anyone ever encounter the same issue I have right now? I'm searching for a solution to this for several already and still not find anything. Looks like many people have the same issue too. Thanks all for you eventual answers.

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• A-2-Z web hosting on Amazon AWS

  - by JDelage

  All, I am studying web dvp, and one of my classes is project-based. We have to build a functional site that demonstrate our understanding of: HTML, CSS, Javascript, php, MySQL, And potentially Ajax or some other web component. For the project, we can use a local server using WampServer and basically build the site entirely on our laptop. If I have time, I would like to create a real site, and I thought it would be a good way to familiarize myself with Amazon's AWS services. So if I purchase a domain name, can I rely on AWS to host the site from A-to-Z? I understand I can use AWS to host content, the database, and do the background computations, if needed. What else do I need and what are the parts that AWS cannot help me with? Second, is there good documentation for a beginner to navigate AWS and learn how to use it (either on Amazon, or some 3rd party sites, or even a good book, as long as is up to date). The ideal documentation would be a tutorial on creating a web site from a-to-z on AWS, as detailed as possible. As you can guess, I have limited understanding of the IT issues. I have 0 Linux or sysadmin experience, but this is a good opportunity to change that. I hope you can help me. Thank you, JDelage PS: Please keep the answers AWS-specific. At this point, I am only interested in alternative services to the extent that they plug a hole in Amazon's offering.

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• HTTPS and Certification for dummies

  - by Poxy

  I had never used https on a site and now want to try it. I did some research, but not sure that I understood everything. Answers and corrections are greatly appreciated. Here we go: To use https I need to generate ‘private’ and ‘public’ keys for the web server I use. In my case it’s apache (manual: http://httpd.apache.org/docs/2.0/ssl/ssl_faq.html) Https protocol should be bind to port 443. Q: How to do it? Is it done by default? Where can I check configuration? Aplying https. Q: If I see https in browser does it mean that the data traffic on the page IS encrypted? Any form on the page would submit data via https? Though all the data gonna be encrypted, the browsers would still show ugly red messages. This is just because they do not know anything about my certificate. They have about a hundred certificates pre-installed but mine is not one of them, obviously. But the data IS encrypted by https. If I want browsers to recognize my certificate, I would need to have it signed by one of the certification authorities (ca) that has its certificate pre-installed (e.g. thawte, geotrust, rapidssl etc). UPD: To reed about ssl/tsl: The First Few Milliseconds of an HTTPS Connection, I found it very informative. Examples for PHP (openssl.org) of how to make use of ssl/tsl on the server side are published here.

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• What to do with a broken OS X install disc?

  - by slhck

  First things first: I don't appreciate software piracy and I really want to spend money on software that I use and that I work and make money with. I don't want this question closed just because I consider downloading software, I only want honest opinions and alternatives. Here we go: So I have my OS X Snow Leopard Upgrade DVD, but it's horribly scratched and won't boot anymore. It endlessly loads and at some point I have to force pull it out of the disc slot. How can I reset my Mac then? Can I take my original disk to an Apple Store and ask them for a replacement? Will they believe me, even if I don't have the receipt anymore? Would owning the original disk make it okay for me to look somewhere on the internet and download it? I don't even know if that will work without hassles. Could I try to read the disk to an image with some error correction methods? Maybe during boot it can't read some files, but some other program can? Is there any other way of resetting the Mac? Mine's now over 3 years old an I seem to have misplaced my original discs that had 10.4 on it. Or should I just buy a new 10.6 upgrade disk? (Which is not really what I want to do) Answers and opinions would be much appreciated.

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