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• dhcpd: How to tell how many leases are available?

  - by Jakobud

  I'm a little bit new to dhcpd. I'm trying to figure out how many leases we have available on our network. The /var/lib/dhcpd/dhcpd.leases file appears to show almost a history of leases and some of the current leases. Not sure if that really helps me or not... I figured there might be a command or something I'm unaware of that can tell me how many leases are left.

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• Buffer requests in nginx while a symlink switches on backend

  - by Quintin Par

  In a release deployment I would like to buffer client requests that come to nginx(in reverse proxy) mode to be buffered for possibily 1-2 seconds while a pdsh request is sent to switch symlinks on the back end server to /var/www/html/current . After the switch is complete, I would want to release the buffering while avoiding a herd clash. Is this possible in nginx? Can someone help? Edit: The idea is not to loose requests and from nginx forums I've come to know that retries can sometimes results in CPU spins

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• A proper way to create non-interactive accounts?

  - by AndreyT

  In order to use password-protected file sharing in a basic home network I want to create a number of non-interactive user accounts on a Windows 8 Pro machine in addition to the existing set of interactive accounts. The users that corresponds to those extra accounts will not use this machine interactively, so I don't want their accounts to be available for logon and I don't want their names to appear on welcome screen. In older versions of Windows Pro (up to Windows 7) I did this by first creating the accounts as members of "Users" group, and then including them into "Deny logon locally" list in Local Security Policy settings. This always had the desired effect. However, my question is whether this is the right/best way to do it. The reason I'm asking is that even though this method works in Windows 8 Pro as well, it has one little quirk: interactive users from "User" group are still able to see these extra user names when they go to the Metro screen and hit their own user name in the top-right corner (i.e. open "Sign out/Lock" menu). The command list that drops out contains "Sign out" and "Lock" commands as well as the names of other users (for "switch user" functionality). For some reason that list includes the extra users from "Deny logon locally" list. It is interesting to note that this happens when the current user belongs to "Users" group, but it does not happen when the current user is from "Administrators". For example, let's say I have three accounts on the machine: "Administrator" (from "Administrators", can logon locally), "A" (from "Users", can logon locally), "B" (from "Users", denied logon locally). When "Administrator" is logged in, he can only see user "A" listed in his Metro "Sign out/Lock" menu, i.e. all works as it should. But when user "A" is logged in, he can see both "Administrator" and user "B" in his "Sign out/Lock" menu. Expectedly, in the above example trying to switch from user "A" to user "B" by hitting "B" in the menu does not work: Windows jumps to welcome screen that lists only "Administrator" and "A". Anyway, on the surface this appears to be an interface-level bug in Windows 8. However, I'm wondering if going through "Deny logon locally" setting is the right way to do it in Windows 8. Is there any other way to create a hidden non-interactive user account?

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• Set up Gmail with Google apps for own domain

  - by erdomester

  I rent a server from a German company. I have remote access to it as well as WHM and CPanel. I decided to use Google's mail servers for obvious reasons. I am not an admin just an average guy trying to set up what needs to be set up. The problem is I am unable to make the necessary settings. I watched Youtube tutorials, followed written ones as well as Google's help, but there is (at least) one serious problem with my domain settings. The domain console alwasy says Your MX records are incorrect When I check dappwall.com in mxtoolbox.com it says Pref Hostname IP Address TTL 10 mail.dappwall.com 46.4.88.247 24 hrs But this is not the host name. I checked WHM and my hostname is server1.dappwall.com. I can confirm it by typing the hostname command in putty. However, if I do an mx lookup at mxtoolbox.com on server1.dappwall.com or mail.dappwall.com I get Lookup failed after 1 name servers timed out or responded non-authoritatively I ran checks on the google apps toolbox on dappwall.com and two problems emerged: 1.No Google mail exchangers found. Relayhost configuration? 10 mail.dappwall.com In Google Apps > Settings for Gmail > Advanced settings it also says that my current MX records for dappwall.com is Priority Points to 10 MAIL.DAPPWALL.COM. So mail.dappwall.com again. I also have access to a robot provided by the company I rent the server from. Here I see this mail at two places but how should I (if it's necessary) modify this? I set Email routing to Automatically Detect Configuration. 2.There SHOULD be a valid SPF record. "v=spf1 include:_spf.google.com ~all" In the DNS Zone Editor I added this spf record: Name TTL Class Type Record dappwall.com. 1440 IN TXT v=spf1 include:_spf.google.com ~all In the cPanel Email Authentication page it says SPF: Status: Enabled Warning: cPanel is unable to verify that this server is an authoritative nameserver for dappwall.com. [?] Your current raw SPF record is : v=spf1 include:_spf.google.com ~all How can I confirm that my server is an authoritative nameserver for dappwall.com? In WHM Service Configuration Mailserver selection Dovecot was set but I disabled it (i don't know if that's ok). What am I missing here? Where is that mail.dappwall.com coming from?

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• Differences between Fedora servers

  - by Yarin

  I'm using Amazon EC2 and trying to choose a machine image (AMI) for my project. It seems all their LAMP AMIs are Fedora Core 4, but this seems like quite an old version, considering the current release is apparently Fedora 12, and < 10 releases are no longer supported. My question is how significantly different are the early fedora releases- is it crazy to be on versions 4 or even 8? (I realize this is probably a broad question)

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• In Mail.app, move the reply to the original email's folder?

  - by Charles Brossollet

  As many, I find it handy to have emails organized by folders, but I don't like the fact that sent mails are in a separate folder. My idea would be that when I answer to an email that is already in a folder, the answer is placed automatically in that same folder. Is there a script or a plugin to do this in Mail.app? The corresponding add-on for thunderbird is Copy sent to current

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• Win7 - Chrome: Accelerated rasterization not enabled/not supported

  - by Wozzie

  Win 7 Pro SP1 x64 EVGA Geforce GTX 670 FTW 2gb Geforce Driver: 320.49, it did happen with the previous version of the driver as well Chrome Version 28.0.1500.52 beta-m DirectX: 11 I was looking in chrome://gpu which told me that "Rasterization: Software only. Hardware acceleration disabled." and further down "Accelerated rasterization has not been enabled or is not supported by the current system." Is there a way to enable hardware acceleration?

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• ec2 LAMP REDhat distro change mysql password error

  - by t q

  i am on ec2 plain linux and wish to change my mySQL password ive tried: sudo mysqladmin -u root -p '***old***' password '***new****' then it prompts me to enter password then i enter ***old*** but i keep getting an error message mysqladmin: connect to server at 'localhost' failed error: 'Access denied for user 'root'@'localhost' (using password: YES)' question: how do i change my current password?

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• How to embed a shell and browser into a presentation?

  - by Karl Bielefeldt

  I am responsible for demonstrating changes to our software every two weeks. Since the software has both telnet and web interfaces, I think it would help the demo go more smoothly if I could embed a web browser and a telnet client or shell directly into presentation slides, like this: My current idea is to write extensions for LibreOffice to do it, but obviously I don't want to reinvent the wheel if I can help it. Does anyone know of a way to accomplish this? I prefer PowerPoint 2007 or LibreOffice on Windows 7, but am open to suggestions for any software or OS.

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• gitk looks ugly / doesn't honor theme settings

  - by hasenj

  I'm running Xubuntu, (actually linux mint with xfce on top, but I suppose it's essentially the same thing) I set my appearance theme to (a modified version of) MurrinaStormCloud, but if I run gitk, it uses ugly font rendering, ugly colors, ugly widgets. I think tcl is the thing to blame here, but can I fix it? Here's a picture for comparison between what firefox looks like under the current theme and what gitk looks like:

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• What's A Good Real Time Html Editing Extension?

  - by user23392

  Hi, i always like to real-time edit a web page source in the browser and updated as i type, but firebug really sucks, i can't insert scripts in the current page, some times the changes i type aren't updated at all, Is there any robust firefox/chrome extension for that? i try to temporarely edit/add code to an existing web page in the internet, not a local one Thanks

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• PuTTY: Forcibly terminate an SSH session without closing the window

  - by jjlin

  Is there a way to forcibly terminate an SSH session in PuTTY, short of closing the PuTTY window? For example, in OpenSSH, I can use the ~. escape sequence to kill the connection. This is useful when the SSH session stops responding for some reason, but I don't want to lose any of my current session-specific settings. In that case, I'd like to kill the session and then use Restart Session to reconnect.

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• Is there an easy way to transfer Firefox extensions and profiles from one OS to another on the same

  - by Eric

  I'm assuming that most, if not all, the extensions and changes to the userchrome.css will work on Ubuntu Netbook, so I'm looking for a simple way to transfer them all from my primary Vista OS to my Ubuntu Netbook OS, on the same machine. It also has to be free. I am the most current stable build of Firefox 3.6.5 on both systems.

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• Exchange-Server Query

  - by Rudi Kershaw

  First, a little background. I've recently been taken on as a web and software developer for a small company, who has no other in-house IT support. They've been asking my opinion on lots of IT subjects that are quite far out of my comfort zone. I'm definitely not a network admin. Their IT consultancy contractor is pushing them to upgrade their dedicated exchange server, even though it seems like the one they currently have has a lot of life left in it and is running problem free. They say it's "coming to the natural end of it's life". They want to install a monster with a Xeon E5-2420, 32GB RAM, 2x 1TB HDDs, Windows Server 2012 and Microsoft Exchange 2010. They want to charge a small fortune for it. Basically, this system seems massively over the top seeing as it won't be doing anything else other than running as an exchange server for a company with less than 25 email accounts. My employers also have a file server system in-house that hosts three web apps, an SQL server, their local domain, print server and shared folders. That machine is using the same specs as the proposed new one, and it is barely using any of it's potential. I asked if Microsoft Exchange 2010 could be installed on their file server, but they said that MS Exchange can't run on the same system as an SQL server because for some reason they will eat up each others resources (even though the SQL server isn't touching 1% of the current system's CPU or RAM). My question is really, are they trying to rip my employers off? Could MS Exchange be installed on their other server (on a virtual instance or not), or does the old one even need replacing at all? Going with their current suggestion will cost the company in excess of £6k, and it seems entirely unnecessary. I apologies, because I know this is probably a little thin on details, but if I carry on I could end up writing a massive essay that no-one will want to read. I've been doing my research, but I'm not knowledgeable enough make any hard decisions. Let me know if you need any more details. Thank you for any help you can offer. Further Details: The new exchange would need to support Outlook Web App, 25 users, a few public mailboxes, and email exchange with Blackberries.

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• when browsing a folder on a mac, how can I see the full path?

  - by sososo

  I want to see the fullpath of the current folder I am viewing on my mac. It only shows the files and subfolders, I want to know the parent folder and full path. how?

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• Is there a setting in Opera to allow tabbing through links as well as form fields?

  - by Paul D. Waite

  In some browsers, the tab key moves the browser’s focus through form fields and links on the current web page. In Opera (on the Mac, version 10.10), it only seems to move the focus through form fields, not links. Is there a setting (or keyboard shortcut) to get the tab key to focus links as well as form fields?

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• What is involved in upgrading from SSL 2.0 to SSL 3.0 in IIS 6?

  - by Ryan

  I am using a site security testing suite and it says SSL 2.0 has known vulnerabilities and I should change it to SSL 3.0. Will my current certificates still work once I switch to SSL 3.0? How do I make the switch? Is it only in IIS or could I need to change anything on my web application? Thanks

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• Should I worry about making my picasa web albums public?

  - by Motti

  I choose the public option for all my albums in Picasaweb, these mostly (90%) contain pictures of my children which I share with my family. Ever so often somebody I don't know adds me as a favorite, at current count I have 7 people in my fan list (non of whom I know) and only three of them have any public albums. Is this creepy? I take care not to upload any pictures that may attract perverts What would you recommend, private by default or continue with public?

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• Can I add a second mobile/cell network to my Blackberry Express Server?

  - by cagcowboy

  We have recently installed Blackberry Express Server for our UK Blackberry users (who are on Vodafone, not sure if the network matters) Our US users have got wind of this and are hoping we can do the same for them. (They're mostly on AT&T) The UK & US Exchange mailboxes are based on 2 different exchange servers So... Q. Is it possible to support the US users with the current installation/server configuration?

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• Run batch file with custom drive mappings

  - by mwolfe02

  I want to create a "mini virtual environment" to run a program. The only difference between my normal environment and the virtual one would be the drive mappings. I have an X: drive mapped to \\some\network\location I have a program myapp.exe that expects the X: drive to be mapped to C:\local\path I need to keep my X: drive mapped to \\some\network\location throughout the process I would like to be able to run the following batch file and not have it affect the current environment: subst X: C:\local\path myapp.exe

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• Is there any way to use a 30 inch monitor with a 13 inch MacBook Pro?

  - by TK

  I'm using MacBook Pro (13-inch, Mid 2009). Can I use this MacBook Pro with a 30 inch display? If yes, which monitor supports it? If I'm current, Apple's 30 inch display doesn't support 13-inch MacBook Pro's.

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• Export layer to png file in gimp

  - by MTilsted

  Is there a simple way to export the current selected layer as a png/jpg file in Gimp 2.8.4 ? I did some searching in google, and the export should do it in gimp 2.6 if the layer is the only visible layer, but I can't get that to work for gimp 2.8 The way I currently do it now is that I select the content, and cut/paste it to a new image, then export the image and close it, but a simple export selected layer would be much more easy to use.

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• Combine several physical servers into 1 virtual server

  - by Jayaraman

  The current virtualisation splits one big physical server into smaller virtual servers. But is it possible to combine several physical servers into 1 virtual server ?

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• What are your favourite less well known keyboard shortcuts in Windows?

  - by Richard Szalay

  The title says it all. Here are a few of my favourites to get things started: WINDOWS + BREAK - System Properties CTRL + SHIFT + ESC - Task Manager SHIFT + F10 - Context Menu (on keyboards without a CM key) And general text selection: HOME/END - Go to the start/end of the current line CTRL + HOME/END - Go to the start/end of the document CTRL + LEFT/RIGHT - Skip entire words SHIFT + CTRL + LEFT/RIGHT - Select entire words Edit: Just remembered this one SHIFT + DEL - Delete file (skip recycle bin)

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• Tool to edit the online pages

  - by doug

  hi there When i read something I need to underscore what i like, or what i think is important, and to take notices about that read, near on that current paragraph. Soo, does anyone know a firefox addon or something else(other browser, any other application) which can provide me such a functionality? ps: I've tried some research tools as zotero, but it is not what I'm looking for.

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