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• How to disable screens turn off Windows 8.1

  - by Warpzit

  So recently my computer started turning my screen monitors off after a while without activity, if I move the mouse or hit the keyboard they turn back on. I just want them to stay on. My System is windows 8.1 64 bit, I have 2 screens with mini display port and 1 television with hdmi which often is in regular television mode when this issue happens. Now before you jump to conclusions this is what I've tryed: Disabled screen saver Power saving settings to high with following set: Turn of the display: Never Put the computer to sleep: Never Turn off hard disk after: Settings: Never Sleep: Sleep after: Settings: Never Display: Turn off display after: Settings: Never Display: Enable adaptive brightness: Settings: Off Multimedia settings: When sharing media: Settings: Prevent idling to sleep. Any pointers that get me in the right direction will be greatly appreciated.

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• Auto restart server if virtual memory is too low

  - by Sukhjinder Singh

  There are quite number of software running on my server: httpd, varnish, mysql, memcache, java.. Each of them is using a part of the virtual memory and varnish was configured to be allocated 3GB of memory to run. Due to high traffic load which is 100K, our server ran out of memory and oom-killer is invoked. We've to reboot the server. We have 8GB of Virtual Memory and due to some reason we cannot extend to larger memory. My question is - Is there any automated script, which will monitor how much virtual memory left and based upon certain criteria, lets say if 500MB left than restart the server automatically? I do know this is not the proper solution but we have to do it, otherwise we don't know when server will get OOM and by the time we know and restart the server, we lost our visiting users.

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• If a SQL Server Replication Distributor and Subscriber are on the same server, should a PUSH or PULL subsciption be used?

  - by userx

  Thanks in advance for any help. I'm setting up a new Microsoft SQL Server replication and I have the Distributor and Subscriber running on the same server. The Publisher is on a remote server (as it is a production database and MS recommends that for high volumes, the Distributor should be remote). I don't know much about the inner workings of PUSH vs PULL subscriptions, but my gut tells me that a PUSH subscription would be less resource intensive because (1) the Distributor is already remote, so this shouldn't negatively effect the Publisher and (2) pushing the transactions from the Distributor to the Subscriber is more efficient than the Subscriber polling the Distribution database. Does any one have any resources or insight into PUSH vs PULL which would recommend one over the other? Is there really going to be that big of a difference in performance / reliability / security?

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• How to get a windows domain server to recognize a linux machine by its name?

  - by CaCl

  In my company I ran into an issue where we have a linux machine that serves up a Subversion repository. Its hooked up via LDAP to the Active Directory. We got an account setup for an application and they set the Limited Workstations up so it didn't have full access to the network. The problem is that even though the hostname for our machine resolves correctly for me, the credentials for the application account seem to come back as not being allowed based on the name (the error was related to authorized workstations). I don't have access to any of the domain servers but it might be helpful to come at the management or high-level techs with some ideas, they don't seem to have a solution besides allowing all workstations for the user. Does anyone have any idea on how to get my linux machine to properly identify itself with the Domain machine by name?

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• 100% CPU in QuickTime H.264 decoder on Windows on Win7, except when using XP compat. mode

  - by user858518

  I have a Windows program that uses the Apple QuickTime API to play video. On Windows 7, CPU usage is 100% on one core, which I believe is why the playback is choppy. If I turn on XP compatibility mode for this program, the CPU usage is around 20% of one core, and playback is normal. Using a profiling tool called Very Sleepy (http://www.codersnotes.com/sleepy), I was able to narrow down the high CPU usage to a function in the QuickTime H.264 decoder called JVTCompComponentDispatch. I can't imagine why there would be a difference in CPU usage when XP compatibility mode is turned off or on. Any ideas?

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• We want to setup low cost private cloud [closed]

  - by Virtual Jasper

  We are a small company with very limit funds. In order to improve our server reliability, we are studying to migrate to CLOUD. We seen some CLOUD provider, they would charge by resources such as, CPU, RAM.....Disk space....High Availability....etc. We have server team, so we also consider to built the private CLOUD, we seen the Windows 8 server, it does need license fee. So we looking at Linux side, we look at Ubuntu and OpenStack. What is the different between Ubuntu and OpenStack solutions? Is it both free on software license? and only to pay the technical support.

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• Is it possible to put an 8000 series socket-F Opteron into a dual-socket motherboard?

  - by René Kåbis

  Exactly what it says on the Tin. I have a dual-socket, socket-F motherboard in which I am looking to put two high-end quad-core Opterons, but the 2000 series are nearly double the price of the 8000 series on eBay. Can I just drop in a pair of 8000 series processors and be done with it, or are there processor-critical motherboard features that would be present on a quad(+)-socket motherboard that don’t exist on a dual-socket motherboard? Please elaborate or link to resources that can explain this further, as I am not adverse to research (and I am interested in the technical issues involved) I am probably using the wrong search terms, as Google failed to return anything within the first few dozen results.

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• Using Excel Lookup Function and Handling Case Where No Matches Exist

  - by Dave

  I'm using Excel to enter data for an event where people register. A high percentage of the registrants will have registered for previous events, so we can their name and ID number. I'm trying to use the LOOKUP function in Excel to lookup the name and then populate the ID field with their ID number. This works well unless the value that is looked up is a new user that we don't already have details for. However, if the LOOKUP function can not find an exact match, it chooses the largest value in the lookup_range that is less than or equal to the value. This causes a problem since you can't tell if the match was exact (and the data is correct) or not exact and the match is incorrect. How do I catch non-matches and handle separately?

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• Does "I securely erased my drive" really work with Truecrypt partitions?

  - by TheLQ

  When you look at Truecrypt's Plausible Deniability page it says that one of the reasons for partition with solely random data is that you securely erased your drive. But what about the partition table with full disk encryption? How can you explain why the partition table says there's a partition of unknown type (With my limited knowledge of partition tables I think that they store all the partition filesystem types) and with solely random data? It seems that if your going to securely erase the drive you would destroy everything, including the partition table. And even if you just wiped the partition, the partition table would still say that the partition was originally NTFS, which it isn't anymore. Does the "I securely erased my drive" excuse still work here? (Note: I know that there's hidden truecrypt volumes, but I'm avoiding them due to the high risk of data loss)

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• How can I monitor ports on Windows?

  - by Olav

  What is the simplest way on "local" (1*) Windows, for known ports, to: Find out if it is used. Find out as much as possible about what is behind the port. Find out as much as possible about traffic through the port. Find out if something else is interfering with the port and traffic to it. I have used Fiddler in the past, but I think that's mostly HTTP? I don't if Wire-shark does more? I think there is a tool closely integrated with Windows? Which one? (5). I am looking at NMap, but its seems to be more a suite of tools, and a high entry level. 1*: Primarily this is for what happens inside my Windows Machine, but if necessary, I can for example use a VM, or the wireless connection.

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• Enable group policy for everything but the SBS?

  - by Jerry Dodge

  I have created a new group policy to disable IPv6 on all machines. There is only the one default OU, no special configuration. However, this policy shall not apply to the SBS its self (nor the other DC at another location on a different subnet) because those machines do depend on IPv6. All the rest do not. I did see a recommendation to create a new OU and put that machine under it, but many other comments say that is extremely messy and not recommended - makes it high maintenance when it comes to changing other group policies. How can I apply this single group policy to every machine except for the domain controllers? PS - Yes, I understand IPv6 will soon be the new standard, but until then, we have no intention to implement it, and it in fact is causing us many issues when enabled.

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• Prevent applications from being run as administrator

  - by Unsigned

  Background Most installation toolkits have the ability to launch, automatically or otherwise, external programs after installation. This is often appears in the installer via such options as "Show readme", or "Start program". Issue The problem is, many of these installers are poorly coded, and do not drop permissions appropriately, for example, opening the application's homepage in the browser... launching the browser with the installer's Administrative privileges, or a "High" UAC integrity level. This has the potential to open up security breaches, by opening up a webpage (and possibly browser addons), that are now running with elevated permissions. Question The question is: Is there a way to prevent certain applications (such as a web browser) from ever being launched with Administrative privileges, i.e., an automatic drop-privilege?

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• Prevent specific applications from being run as administrator

  - by Unsigned

  Background Most installation toolkits have the ability to launch, automatically or otherwise, external programs after installation. This is often appears in the installer via such options as "Show readme", or "Start program". Issue The problem is, many of these installers are poorly coded, and do not drop permissions appropriately. For example, starting the application automatically, or opening the application's homepage in the browser, often results in launching the application or browser with the installer's Administrative privileges, or a "High" UAC integrity level! This has the potential to open up security breaches, by opening up the installed application, or a web page (and possibly browser add-ons), that are now running with elevated permissions. (This is the reason I strongly recommend never choosing auto-launch options when installing software.) Question The question is: Is there a way to prevent certain applications (such as a web browser) from ever being launched with Administrative privileges, i.e., an automatic drop-privilege?

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• Looking for a product configurator

  - by Netsrac

  I am looking for a product configurator for products with high complexity. The main goal is to allow a sales person to configure the product in a correct and working manner. The product is a combination of hard- and software options. The options for sure have dependecies (so option A needs B and C) and can also exclude each other. The performance requirements of the software related to the hardware need to be considered. So some rules need to be defineable. Does anybody know a tool (preferred open source) doing that job? Thanks for your help.

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• Enterprise Data Center System Admin/Engineer to Server Ratio

  - by Bob

  I know there have been similar questions asked over the last few months however looking at a Data Center Operations and know there are some really smart people out there that might be able to help. Looking for some staffing best practices based on first hand experience and was hoping that there is some experience in this area that can provide "best practice" application: Three High Availability (99.99% plus) Enterprise Level Data Centers geographically dislocated, one manned 24x7x365, one lights out, one co-location running HOT-HOT-HOT supporting a global community. More than 2,000 operating systems consisting of 95% Windows, 5% Linux and Solaris, 45% virtualized, more than 100TB storage. No desktop support, no Network Administration (administrated separately), running N+1 and serving more than 250 Billion page views annually. Based on experience what has been your experience with Server to "Data Center System Administrator/Engineer" ratio? Thanks in advance for your responses.

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• In a virtual machine monitor such as VMware’s ESXi Server, how are shadow page tables implemented?

  - by ali01

  My understanding is that VMMs such as VMware's ESXi Server maintain shadow page tables to map virtual page addresses of guest operating systems directly to machine (hardware) addresses. I've been told that shadow page tables are then used directly by the processor's paging hardware to allow memory access in the VM to execute without translation overhead. I would like to understand a bit more about how the shadow page table mechanism works in a VMM. Is my high level understanding above correct? What kind of data structures are used in the implementation of shadow page tables? What is the flow of control from the guest operating system all the way to the hardware? How are memory access translations made for a guest operating system before its shadow page table is populated? How is page sharing supported? Short of straight up reading the source code of an open source VMM, what resources can I look into to learn more about hardware virtualization?

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• JBoss basic access

  - by user101024

  I have JBoss 5 deployed on Solaris 10 - the servers connection has unrestricted high ports (1023) open to the internet. I can access the box via ssh & FTP from a second server on the same subnet and anywhere over the internet. JBoss is running over port 8080 and is accessible via http://locahost:8080 on the box itself. I cannot access it via http://ip.add.goes.here:8080 from either the other server on the same subnet or via the internet. Is there any service or configuration within JBoss or elsewhere on Solaris 10 that needs to be changed from default to allow http traffic to be served? Thanks, Kevin

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• Mac OS X: What is using my 'active' memory?

  - by badkitteh

  Hello fellas, I'm using a recent MacBook Pro with 8 GB of RAM and after a few hours of using it at work I notice the amount of 'active' memory growing and growing. Whenever I reboot my Mac, everything looks fine and it is hardly using any RAM. But after a few hours it looks like this: As you can see, in this case it's about 4.3 GB. Being a developer, I know that 'active memory' is the amount of memory that is currently used by running processes. So the first thing I did was quitting all applications and killing all processes that don't seem to belong to Mac OS X. After I did that, my active memory came down about 400 MB, but got stuck at what you see in the screenshot. There are no more processes or applications to quit. Now I'm wondering what is actually holding on to the memory? top and Activity Monitor don't report any processes with a high memory usage. Any ideas? Thanks!

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• Any way to disable specific CPU idle (Cx) states?

  - by Philippe

  I just got a new Toshiba Tecra S11 notebook, which has a Core i5 520M CPU, and it appears to suffer from a well-known problem: a high pitched noise when the CPU is idle. Googling around revealed that this is caused by a specific power-saving mode in the CPU. In most cases, C4 mode is blamed for the noise. So my question is: is it possible to disable C4 mode (or any other "sleep" mode) using some utility or BIOS setting? I don't mind if it hurts battery life. I'd appreciate any advice on this matter. It's driving me crazy. FYI: I'm running Windows 7 64-bit

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• How to bring back a far right chromeless window?

  - by Click Ok

  Accidentally some windows goes far right, and "goes out of" to the monitor. I know keyboard shortcuts to move it back when the windows have a title bar. But that windows (HTC Home and Rainlendar) don't have title bar, doesn't appears in windows TaskBar or TaskManager. I've tryed restart windows; to close and reopen that software; change the resolution to very low, and then to very high; but it doesn't works... I know that I can dig in the settings files of that programs, but I think interesting discover how to bring back that windows so I can use that technique if that problem appears again with another softwares too. Thank you!

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• Nightly backups (and maybe other tasks) causing server alerts

  - by J. Pablo Fernández

  I have two independent alert notification systems for my servers. The server is a virtual machine on Linode and one of the alerts comes from Linode. The other monitoring system we use is New Relic. They are both watching out for IO utilization. Every night I get alerts from both of them as the server is using too much IO. I run quite a few tasks in the middle of the night but the one I confirmed that can cause IO-warnings is running the backups. The backup is done by s3cmd sync. I tried ionice but it still generates the warnings. Getting warnings every night reduces the efficacy of warnings when they happen for real. For Linode I could raise the level at which a warning is issued, but it might mean making the whole thing useless as the level is too high. What would be the proper solution for this?

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• Remote additional domain controllers

  - by user125248

  Is it possible to setup several additional domain controllers (ADC) at remote locations that are connected via medium bandwidth DSL (2-10 Mbit) WAN connections for a single domain (intranet.example.com)? And would it be a good idea? We have five sites and would like to have extremely high availability if any of the site were to lose their Internet connection. However each site is very small, and all are over a fairly small geographical area within the same region, so it would seem strange to have a PDC for each of the sites. If it were possible to have an ADC for each site, would the clients use the ADC or just use the PDC if it's available to them?

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• solutions for a webserver dedicated to manage permissions/ACL and (reverse) proxying API servers?

  - by giohappy

  I'm considering various layouts to expose various HTTP API services (running on their own differents servers) through a frontend server dedicated to manage permissions on behalf of the API services. I've considered various options, from the classical ones like Nginx, Apache, etc. to HAProxy, passing by the various Python webserver solutions like Tornado, Twisted (which gives me the opportunity to implement my own ACL system easily). The foundamental feature is high performance and scalability, and the ability to manage fine grained ACL rules (similar to the HAProxy ACL system) I would like to know what is a suggested approach to setup what I need, and if (opne source) ready-to-use solutions are already available dedicated to this.

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• Please provide how to setup using VMware, AD [closed]

  - by user552585

  In my organisation we have more than 100 pcs and high configured 3 IBM servers. Now the senario is 300 employees with diff programmers like .Net,java,php etc. these employees use by these systems only in diff shifts without stop their work. I want all applications required them on every system and they have perticular id, Pw to login and i have to secure the organisation data and userdata to tamper or any thing by other users. Please provide how to setup using VMware, AD with MicroSoft environment with fully secured manner. please give brief explanation. Please help me

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• Image annotation with Inkscape, Pointer and explanation for objects in picture

  - by None

  I need straight paths with end markers for associating text to parts of the image. For better readability, it needs to be high-contrast, i.e. a white line with black outline. Stroke to path will create a group of a box and a circle from the line with end marker. This makes placement of the markers more difficult, as with the node tool it is just a matter of dragging the end nodes of a line segment. I will try to place the markers as line for now and only finally converting them to an outline.

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