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• X11Forwarding on MacOSX (Leopard/Snow Leopard)

  - by Shyam

  Hi, I have some remote boxes, which are a bunch of Mac Mini's. I access them now through SSH, and it fits my needs to do the maintenance. In the past, I used X11Forwarding with Linux boxes, when I was still using Debian myself, and I was able to run a specific application as if it was natively present (Firefox). I haven't succeeded to do this yet, but I assume because of the BSD underneath the fancy Apple GUI should be able to do such a task similar. I am aware of the remote administration, but I rather keep access limited to SSH on these boxes for inbound connections. Background information about the why's, tips, advice and comments are all helpful! Thanks!

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• How to select a server that supports Windows scheduled file IO

  - by Kristof Verbiest

  Background: I am developing an application that needs to read data from disk with a fairly consistent throughput. It is important that this throughput is not influenced by other actions that happen on the disk (e.g. by other processes). For this purpose, I was hoping to use the 'Scheduled File I/O' feature in Windows (throught the GetFileBandwithReservation and SetFileBandwithReservation functions). However, this StackOverflow question has thought me that this feature is only available if the device driver supports it. Currently I have no computer at my disposition that seems to support this feature (I have an HP Proliant server and a Dell Precision workstation). Question: If I were to order a new server, how can I know beforehand if this feature will be supported by the device driver? How 'upscale' does the server have to be? Has anybody used this feature with success and cares to share his experiences?

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• How to properly create a startup script for tracd on Synology DS209+II?

  - by Daren Thomas

  I'm running tracd on a Synology DS209+II NAS. For that purpose, I have created a script in /opt/etc/init.d called S81trac: myserver> ls -l /opt/etc/init.d -rwxr-xr-x 1 root root 127 May 19 09:56 S80apache -rwxr-xr-x 1 root root 122 Jun 10 10:17 S81trac This file has following contents: #!/bin/sh # run tracd /opt/bin/tracd -p 8888 -auth=*,/volume1/svn/svn-auth-file,mydomain -e /volume1/trac-env And this actually works, except, the NAS never really finishes booting: The blue light keeps flashing. Also, reboot doesn't work anymore (it hangs) and I have to use killall init to reboot the machine. I have tried running tracd in the background, by appending & to the last line of S81trac. After rebooting, the blue light stops flashing. But ps | grep tracd is empty and I can't connect to the trac instance from my PC. I guess I'm doing something wrong here, but what?

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• Tor Browser: how do I restart just the browser?

  - by GDR

  I'm using Tor Browser on Linux from time to time, but I close the browser because it has high memory usage, and leave Vidala running in background to help the network and relay traffic. The problem is, when I want to use Tor Browser again, I have to shut down Vidala and start it again. This takes time and has negative effect on the network. When I execute ./App/Firefox/firefox-bin, the browser starts but says it's not connected via Tor network. Any ideas how to start tor browser and make it connect to existing Vidala instance?

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• ESXi 5.1 on Poweredge 510 freezes after base-esx update

  - by goober

  Background / Problem Just experienced an issue where an ESXi host was upgraded from 5.0 -- 5.1 perfectly fine. Then, I did a scan and remediated a patch (ESXi510-201210401-BG) Looking into the host on via the kvm switch, this appears to complete successfully. However, on reboot, the server hangs at the "Initializing Power Management" phase. I've read from various spots around the internet that this usually clears itself up again upon a cold boot, but given that our servers are in a different building with different access rules, the less I have to physically go there, the better. :) Question Is there anything I can do to avoid an ESXi host hanging at the "initialize power management" phase of boot after remediating the host to apply patches?

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• Configure Windows XP Embedded to automatically dismiss unexpected MessageBoxes

  - by Pokot0

  I have the need to configure a Windows XP Embedded system in order to dismiss modal MessageBoxes with a default reply. I am aware of the EnableDefaultReply feature but I need to be more selective on which MessageBoxes to dismiss or select the default reply on some criteria (example: name of the window). My biggest problem right now is that: If do not enable the EnableDefaultReply feature: some background services pop up dialogboxes which are never dismissed and block the application If I enable the EnableDefaultReply feature: I am no longer able to logon to the system if another user is logged in (a MessageBox popups asking if you want to steal the logon and the default answer is NO). Do you have any experience you can share with this problem?

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• starting nginx via upstart

  - by Chiggsy

  Background: DISTRIB_ID=Ubuntu DISTRIB_RELEASE=10.04 DISTRIB_CODENAME=lucid DISTRIB_DESCRIPTION="Ubuntu 10.04 LTS" I've built nginx, and I'd like to use upstart to start it: nginx upstart script from the site: description "nginx http daemon" start on runlevel 2 stop on runlevel 0 stop on runlevel 1 stop on runlevel 6 console owner exec /usr/sbin/nginx -c /etc/nginx/nginx.conf -g "daemon off;" respawn I get "unknown job" when i try to use initctl to run it, which I just learned apparently means there is an error, ( what's wrong with "Error" to describe errors?) Can someone point me in the right direction ? I've read the documentation , as it is, and it seems kind of sparse for a SysV init replacement... but whatever just need to add this job to the list, run it, and get on with what's left of my life... Any tips? EDIT: initctl version init (upstart 0.6.5)

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• Any ideas for automatic initial/scripted configuration of a NetApp?

  - by maddenca

  The background is to make a solution where we can automate as much as possible the building up of ‘pods’ that include server/network/storage and that will be built at remote sites. In an ideal world would be that we create a single management server which is preconfigured with DHCP/TFTP/or whatever. This management server is racked with a CISCO UCS, FAS31x0, etc. at a build site and is then transported to the final customer site where on power it almost configures itself, or at least bootstraps itself far enough that a remote skilled 'expert' can complete the setup of the pod. Ideas (doesn't have to resemble 100% of the above) would be helpful.

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• What's the closest equivalent of Little Snitch (Mac program) on Windows?

  - by Charles Scowcroft

  I'm using Windows 7 and would like to have a feature like Little Snitch on the Mac that alerts you whenever a program on your computer makes an outgoing connection. Description of Little Snitch from its website: Little Snitch informs you whenever a program attempts to establish an outgoing Internet connection. You can then choose to allow or deny this connection, or define a rule how to handle similar, future connection attempts. This reliably prevents private data from being sent out without your knowledge. Little Snitch runs inconspicuously in the background and it can also detect network related activity of viruses, trojans and other malware. Little Snitch provides flexible configuration options, allowing you to grant specific permissions to your trusted applications or to prevent others from establishing particular Internet connections at all. So you will only be warned in those cases that really need your attention. Is there a program like Little Snitch for Windows?

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• Command-line HTTP crawler for Windows?

  - by Pekka

  Would somebody have a recommendation for a web site crawler that can be invoked and equipped with settings from the command line? This would need to run in a Windows environment. Saving the data, following stylesheet links etc. is not an issue. I only need the crawler to start with a page, parse it, and follow all the links on the same domain so that in the end, all pages on the site have been requested once. Background: I'm setting up a web site that gets frequently uploaded from an office location. Combining data from various sources, it has several levels of caching. I don't want the first user to visit the site after a fresh upload to have to wait until the page has been generated and saved in the cache.

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• Do I really need Microsoft Updates?

  - by Tony Wong

  When I install a fresh copy of XP home (bought it from the store.. not a copy) my pc rocks like lightening speed. But when I start installing all the updates, patches & less .NET 4.0 client (As the .NET 4.0 Client seems to bring machine to slow crawl). The pc starts to slow down.. like there is more resources to watch or something in the background is happening. So could I not get away with a awesome virus protector & awesome firewall set-up and avoid all the patches? The machine I have is a quad 4, 4gb ram and 2.3 GHZ process. Tons of room and the machine can run several apps at one time.. but when the updates happen.. its s-l-o-w!

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• Is there a rule of thumb for RAM upgrades?

  - by Retrosaur

  I'm having a hard time figuring out whether or not a certain laptop/computer's RAM can be upgraded or not. Is there a rule of thumb that determines how much max RAM one could add to a system without looking it up via external websites? A little bit of a background information: I work in computer sales at a computer electronics store, so it is virtually impossible for me to install any sort of software that would detect computer specs, and I get a lot of customers who wonder what laptop/desktop RAM upgrades usually are. Is there a certain rule that adding more RAM entails? Does it make a difference if it's a 32-bit or 64-bit machine? OS?

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• Photo Management Software for OS X That Supports Multiple Library Locations

  - by Lance Rushing

  I'm looking at the possibility of changing our photo management software. Thinking about Aperture or Lightroom. And want to know if either supports: Having folders/libraries on separate harddrives/Volumes. Tolerates having network folders occasionally connected Snappy interface A solid enough piece of software as not to crash or behave weirdly. [ so the wife doesn't get stuck and have to call me ;) ] Background The wife is photographer and I'm the computer programmer. Our current setup is Picasa, with a "Recent/Working" folder on the local iMac harddrive, and "Archive" folders on NFS mounted Linux Server, Raid 5, for redundant and extra storage capacity. (the Linux server also syncs with Amazon's EC2) Picasa is doing OK, but I get annoyed when it doesn't do behave properly. Usually around issues when the Linux disk isn't mounted. And overall, I wish Picasa seemed a little more polished and snappier. Thanks, Lance

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• Bring OS X Error Message window to the front

  - by Debilski

  In OS X, when an application crashes, a window with an error report will appear. That window is by default unreachable by Command+Tab nor does it appear in the Dock. Of course, if by error or on purpose one clicks another window, the error report will go to the background and hide behind the other windows. This is really annoying, because in order to see it, I will have to use Exposé and scan through 20+ Windows in order to find it. (Not to say, that I don’t like Exposé anymore since Snow Leopard made the window sizes all confusingly equal.) Any ideas on how to make the error reports Command+Tabbable?

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• Redirect output of Python program to /dev/null

  - by STM

  I have a Python executable, written and compiled by somebody else, that I simply need to run once halfway down my own bash script. The program uses a text-based UI, therefore waits for input before proceeding, but the key operations it performs when starting are required in my bash script. A messy (and strange) procedure I know, but unfortunately I haven't got any other options. I've gotten around forcefully closing the program with a kill signal, but the program's TUI insists on outputting to wherever it's run. I've tried redirecting both stdout and stderr to /dev/null and running the program in the background by suffixing an ampersand, but simply can't get it to play ball. I believe the cause is the program spawns other processes, and the output redirection of the parent process doesn't affect them. Is there any trick I can utilise to redirect all output from child processes too?

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• KVM switching on the cheap

  - by Stuart Hemming

  I have a machine at home for my personal use. I also have a machine for work. I have a pair of DVI monitors. An ideal set up for a KVM switch. Sadly the cheapest switch I can find that will switch 2 DVI monitors is nearly £300. However, I can get, for just £40, a switch for a single monitor. Is there any reason why I couldn't employ 2 of these much cheaper switches? My thought was to have the keyboard, mouse and one of the monitors in one switch and just the 2nd monitor in the 2nd switch. Logically, I can't think of a reason why this wouldn't work, but I have no real background to be able to say, definatively, whether or not it would. It it makes any difference, both machines are running Win7. Appreciate any thoughts. -- Stuart

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• How can I easily identify all keyboard shortcuts (hotkeys) on OS X and current running Applications

  - by Michael Prescott

  By default, the function keys on my MacBook Pro control various hardware features and native operating system applications like the brightness of the LCD, Expose, or iTunes. I like these buttons and can use the fn button to take advantage of application Function keys when working with certain applications. Some service-type, background applications also have useful keyboard shortcuts. I tend to forget which keys are active at the moment and sometimes launch the wrong processes. Is there an application or operating system, native way of identifying all of the currently available keyboard shortcuts?

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• CPU load, USB connection vs. NIC

  - by T.J. Crowder

  In general, and understanding the answer may vary by manufacturer and model (and driver, and...), in consumer-grade workstations with integrated NICs, does the NIC rely on the CPU for a lot of help (as is typically the case with a USB controller, for instance), or is it fairly intelligent and capable on its own (like, say, the typical Firewire controller)? Or is the question too general to answer? (If it matters, you can assume Linux.) Background: I'm looking at connecting a device (digital television capture) that will be delivering ~20-50 Mbit/sec of data to a somewhat under-powered workstation. I can get a USB 2 High-speed device, or a network-attached device, and am interested in avoiding impacting the CPU where possible. Obviously, if it's a 100Mbit NIC, that's roughly half its theoretical inbound bandwidth, whereas it's only roughly a tenth of the 480 Mbit/second the USB 2 "High Speed" interface. But if the latter requires a lot of CPU support and the former doesn't...

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• How to reset video/display drivers in Vista without restarting OS?

  - by jdk

  Currently I have to reboot my system if an external monitor is hooked up for it to be correctly detected and used. I think it would be faster to restart/reset the video or display drivers instead. How do I do this under Vista? I seem to remember from an old laptop using a Windows command-line command that would restart the wireless networking card device when it crashed. Is there something like that for video drivers? Background/Reason Because people rightfully ask why? - This is part of a larger problem which I'm waiting for resolution on from the manufacturer. In the meantime I'm looking for the above quick fix. Actually my video card often crashes my laptop when attaching an external monitor and trying to detect or use it. No solution from vendor yet and latest drivers do the same irksome behaviour. Windows says: A problem with your video hardware caused Windows to stop working correctly.

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• How to reset video/display drivers in Vista without restarting OS?

  - by jdk

  Currently I have to reboot my system if an external monitor is hooked up for it to be correctly detected and used. I think it would be faster to restart/reset the video or display drivers instead. How do I do this under Vista? I seem to remember from an old laptop using a Windows command-line command that would restart the wireless networking card device when it crashed. Is there something like that for video drivers? Background/Reason Because people rightfully ask why? - This is part of a larger problem which I'm waiting for resolution on from the manufacturer. In the meantime I'm looking for the above quick fix. Actually my video card often crashes my laptop when attaching an external monitor and trying to detect or use it. No solution from vendor yet and latest drivers do the same irksome behaviour. Windows says: A problem with your video hardware caused Windows to stop working correctly.

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• Prevent audio recording applications from picking up non-microphone audio output

  - by hheimbuerger

  When talking to people over Mumble/Teamspeak/Ventrilo, I have a few who are broadcasting all of their audio output (e.g. music playing in the background, game sounds, etc.) whenever they are sending -- in addition to the microphone signal. I don't have this problem myself, so it's hard for me to troubleshoot remotely, but I'm interested in collecting solutions for this problem for Windows XP, Vista and 7, so that I can link them to this question. Links to other related SU questions are highly welcome as well, but I couldn't find any. Most people seem to try to either get microphone to feed back into the audio output or turn exactly that off, which is different from this problem. I'm talking about the opposite problem, the output being fed into the input.

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• Are you aware of any client-side malware that sends lots of junk requests for .gifs?

  - by Matt Sherman

  I am getting dozens of 404 errors on my site that are requests for gif's with apparently random names, like 4273uaqa.gif and 5pwowlag.gif. I see that most of them are coming from one user. I assume something is happening in the background on her machine without her knowledge. I assume it's a malware thing on the client. Has anyone seen this behavior before? Would love to advise my customer that s/he has an issue. I'd also like to stop getting these 404 reports. :)

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• How Often Do Windows Servers Need to be Restarted?

  - by Evan

  A little background: We have several Windows servers (2003, 2008) for our department. We're a division of IT so we manage our own servers. Of the four of us here I'm the only one with a slight amount of IT knowledge. (Note the "slight amount".) My boss says the servers need to be restarted at least weekly. I disagree. Our IT Department says that because she restarts them constantly that's the reason why our hard drives fail and power supplies go out on them. (That's happened to a few of our servers a couple times over the last four years, and very recently.) So the question is: How often does everyone restart their Windows servers? Is there an industry standard or recommendation? Is our IT department correct in saying that because we re-start that's why we're having hardware issues? (I need a reason if I'm going to change her mind!)

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• capistrano still asks for the 1st password even though I've set up an ssh key???

  - by Greg

  Hi, Background: I've setup an ssh key to avoid having to use passwords with capistrano per http://www.picky-ricky.com/2009/01/ssh-keys-with-capistrano.html. A basic ssh to my server does work fine without asking for passwords. I'm using "dreamhost.com" for hosting. Issue - When I run 'cap deploy' I still get asked for the 1st password (even through the previous 2nd and 3rd password requests are now automated). It is the capistrano command that start with "git clone - q ssh:....." for which the password is being requested. Question - Is there something I've missed? How can I get "cap deploy" totally passwordless? Some excerts from config/deploy.rb are: set :use_sudo, false ssh_options[:keys] = [File.join(ENV["HOME"], ".ssh", "id_rsa")] default_run_options[:pty] = true thanks PS. The permissions on the server are: drwx------ 2 mylogin pg840652 4096 2010-02-22 15:56 .ssh -rw------- 1 mylogin pg840652 404 2010-02-22 15:45 authorized_keys

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• sudoer scheme for a web developer that retains future control of a server?

  - by Tchalvak

  Background I have a server that I'm looking to set up, and provide access to another web developer. I don't want to put many constraints on him, though I wouldn't mind isolating the site that he'll be developing from others on the server that I will develop. The problem Mainly what I want is to make sure that I retain control over the server in the future. I want to reserve the ability to create/promote/demote and other administrative functions that don't deal with web software. If I make him an admin, he can sudo su - and become root and remove root control from me, for example. What is a good setup for the sudoers file so that he can do things like: *install software (through apt-get) restart apache access mysql configure mysql/apache reboot edit web development configuration type files in /etc * And can't do things like: take away other admin permissions change the root password have control over other security/administrative functions Example sudoer files that accomplish something like that could be useful, I'm sure that people have needed to do this before.

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