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  • How to handle updated configuration when it's already been cloned for editing

    - by alexrussell
    Really sorry about the title that probably doesn't make much sense. Hopefully I can explain myself better here as it's something that's kinda bugged me for ages, and is now becoming a pressing concern as I write a bit of software with configuration. Most software comes with default configuration options stored in the app itself, and then there's a configuration file (let's say) that a user can edit. Once created/edited for the first time, subsequent updates to the application can not (easily) modify this configuration file for fear of clobbering the user's own changes to the default configuration. So my question is, if my application adds a new configurable parameter, what's the best way to aid discoverability of the setting and allow the user (developer) to override it as nicely as possible given the following constraints: I actually don't have a canonical default config in the application per se, it's more of a 'cascading filesystem'-like affair - the config template is stored in default/config.json and when the user wishes to edit the configuration, it's copied to user/config.json. If a user config is found it is used - there is no automatic overriding of a subset of keys, the whole new file is used and that's that. If there's no user config the default config is used. When a user wishes to edit the config they run a command to 'generate' it for them (which simply copies the config.json file from the default to the user directory). There is no UI for the configuration options as it's not appropriate to the userbase (think of my software as a library or something, the users are developers, the config is done in the user/config.json file). Due to my software being library-like there's no simple way to, on updating of the software, run some tasks automatically (so any ideas of look at the current config, compare to template config, add ing missing keys) aren't appropriate. The only solution I can think of right now is to say "there's a new config setting X" in release notes, but this doesn't seem ideal to me. If you want any more information let me know. The above specifics are not actually 100% true to my situation, but they represent the problem equally well with lower complexity. If you do want specifics, however, I can explain the exact setup. Further clarification of the type of configuration I mean: think of the Atom code editor. There appears to be a default 'template' config file somewhere, but as soon as a configuration option is edited ~/.atom/config.cson is generated and the setting goes in there. From now on is Atom is updated and gets a new configuration key, this file cannot be overwritten by Atom without a lot of effort to ensure that the addition/modification of the key does not clobber. In Atom's case, because there is a GUI for editing settings, they can get away with just adding the UI for the new setting into the UI to aid 'discoverability' of the new setting. I don't have that luxury. Clarification of my constraints and what I'm actually looking for: The software I'm writing is actually a package for a larger system. This larger system is what provides the configuration, and the way it works is kinda fixed - I just do a config('some.key') kinda call and it knows to look to see if the user has a config clone and if so use it, otherwise use the default config which is part of my package. Now, while I could make my application edit the user's configuration files (there is a convention about where they're stored), it's generally not done, so I'd like to live with the constraints of the system I'm using if possible. And it's not just about discoverability either, one large concern is that the addition of a configuration key won't actually work as soon as the user has their own copy of the original template. Adding the key to the template won't make a difference as that file is never read. As such, I think this is actually quite a big flaw in the design of the configuration cascading system and thus needs to be taken up with my upstream. So, thinking about it, based on my constraints, I don't think there's going to be a good solution save for either editing the user's configuration or using a new config file every time there are updates to the default configuration. Even the release notes idea from above isn't doable as, if the user does not follow the advice, suddenly I have a config key with no value (user-defined or default). So the new question is this: what is the general way to solve the problem of having a default configuration in template config files and allowing a user to make user-specific version of these in order to override the defaults? A per-key cascade (rather than per-file cascade) where the user only specifies their overrides? In this case, what happens if a configuration value is an array - do we replace or append to the default (or, more realistically, how does the user specify whether they wish to replace or append to)? It seems like configuration is kinda hard, so how is it solved in the wild?

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  • Is it dangerous to substitute unit tests for user testing? [closed]

    - by MushinNoShin
    Is it dangerous to substitute unit tests for user testing? A co-worker believes we can reduce the manual user testing we need to do by adding more unit tests. Is this dangerous? Unit tests seem to have a very different purpose than user testing. Aren't unit tests to inform design and allow breaking changes to be caught early? Isn't that fundamentally different than determining if an aspect of the system is correct as a whole of the system? Is this a case of substituting apples for oranges?

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  • How can I have the passphrase for a private key remembered for a user?

    - by Jon Cram
    I have a collection of web services running on Ubuntu Server 12.04 that pull code from a github repository. These services run under a specific user (let's call that user 'example'). In /home/example/.ssh/is_rsa is the private key associated with the relevant github account. When performing an operation such as git pull I am greeted with: Enter passphrase for key '/home/simplytestable/.ssh/id_rsa':. Enter the correct password and all is ok. The same private key is present on local development Ubuntu Desktop 12.04 machines and no passphrase is asked for. I'd like to be able to have the passphrase remembered so that upon entering it once it is never asked for again. This will aid in automating various web service updates. I'm guessing that the passphrase needs to be stored in the relevant user's keychain such that I don't have to enter it every time the private key needs to be unlocked. How can I achieve this?

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  • Is it possible to allow the user to access the 'Volumes' without asking the Administrator's password?

    - by Tom
    Am the administrator of my Ubuntu system. Recently I added a new user account. But when ever the user tries to access or open the 'Volumes'(Drives where movies, songs and other files are stored) it asks for the Administrator's password. I created the user account to my other family members and I don't want to tell them my password. So is it possible to allow them to access the Volumes without asking Administrator's password ? UPDATE : Ubuntu was installed alongside Windows in my system. I will provide a screenshot of the Volume details -

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  • How to handle this unfortunately non hypothetical situation with end-users?

    - by User Smith
    I work in a medium sized company but with a very small IT force. Last year (2011), I wrote an application that is very popular with a large group of end-users. We hit a deadline at the end of last year and some functionality (I will call funcA from now on) was not added into the application that was wanted at the very end. So, this application has been running in live/production since the end of 2011, I might add without issue. Yesterday, a whole group of end-users started complaining that funcA that was never in the application is no longer working. Our priority at this company is that if an application is broken it must be fixed first prior to prioritized projects. I have compared code and queries and there is no difference since 2011, which is proofA. I then was able to get one of the end-users to admit that it never worked proofB, but since then that end-user has went back and said that it was working previously......I believe the horde of end-users has assimilated her. I have also reviewed my notes for this project which has requirements and daily updates regarding the project which specifically states, "funcA not achieved due to time constraints", proofC. I have spoken with many of them and I can see where they could be confused as they are very far from a programming background, but I also know they are intelligent enough to act in a group in order to bypass project prioritization orders in order to get functionality that they want to make their job easier. The worst part is is that now group think is setting in and my boss and the head of IT is actually starting to believe them, even though there is no code or query changes. As far as reviewing the state of the logic it is very cut and dry to the point of if 1 = 1, funcA will not work. So, this is the end of the description of my scenario, but I am trying not to get severally dinged on my performance metrics due to this which would essentially have me moved to fixing a production problem that doesn't exist that will probably take over 1 month. I am looking for direct answers to this question. This question is not for rants, polling, or discussions as this is not the format for StackExchange. Please don't downvote me too terribly it is pretty common on this specific site of stack, I am looking for honest answers to this situation and I couldn't find a forum more appropriate.

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  • What is the best policy for user account on a Windows 7 Media Center shared by the whole family

    - by Matt Spradley
    What is a good way to manage user accounts for a Windows 7 Media Center PC that is part of an entertainment center for a family? Each family member keeps most of their personal stuff on their own computer. I was thinking the simple approach would be to create an admin account for management and then just create a "Family" user account w/o a password that is the default account used by the media center. This account would be used for the PVR, playing blu rays, music, etc. I don't think it is practical for someone to have to log in every time they use the media center.

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  • Is there a compression method for compressing a group of very similar files, without archiving them?

    - by awiebe
    I want to compress a large nuber of files that have near identical headers, and also some data, however I do not wish to archive them, nor do I wish to zip them individually(because the copression ratio would be much higher if substitutions of similar blocks could be done using a single table). Does a compression method exist to do this already, or should I implement it myself. Note: Don't say "Disk space is cheap", because I may want to use this on an embedded system.

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  • SVN command that returns wether a user has a valid login for a repository?

    - by Zárate
    Hi there, I'm trying to find out an SVN command that would return some kind of true / false value depending on wether the user running it has access to a given repository. I'm building a tool for automated deployment and part of the process is checking out the code from the SVN repository. I'd like to find out if the user running the tool has a valid login already. If there's no valid login, just show a message and exit the tool (handling the SVN login internally is not an option at the moment). Plan B would be parsing the file in svn.simple looking for the repo URL, but thought about asking first. Thanks, Juan

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  • How to set my Ubuntu account to super user at all times?

    - by iaddesign
    I have the latest Ubuntu installed and I'll be the only one using it off the network. My question is: how can I make myself super user at all times? Because when I try to delete a file it says I don't have privileges to do so. I know you are going to say it's a security risk but I'm off the network and want to learn all that I can. I don't want to delete the files through the terminal but want to do it through the user interface/explorer. I've installed LAMP and can't copy my site to the www directory. I've tried to remove the preinstalled index file and it won't let me.

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  • How to disable autocmd or augroup in vim?

    - by Andrew Vit
    Given I have a group of commands such as: augroup MyGroup autocmd CursorMoved * silent call MyCommandOne() augroup END I want to disable all the autocommands in MyGroup for a time and then re-enable it later. Is there anything I can do with the group? Specifically, is there a way to disable the whole group at once? If not, what can I do to disable individual commands? Looking at the help, I only see a few options: augroup! will delete the whole group: I don't think this is right since I will want to re-enable it again. (But maybe there's a way to easily redefine the group again?) :noautocmd will only disable the callbacks for a one-off invocation of a command. (And it disables all autocmds, not specified ones) eventignore addresses the event binding, not the command: it sounds like it disables all bound commands for a given event, not just one command or a group I can specify. How is this done?

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  • Can I find the session ID for a user logged on to another machine?

    - by Dan
    I want to open an application on another computer on the same network via the command line. The scenario here is that the user is in a room surrounded by about 20 computers and wants to be able to launch the same app on every computer without walking from screen to screen opening it up on each individual machine. I've discovered that I can get the basic functionality for this using PsExec as follows: psexec \\[computer] -u [username] -p [password] -d -i [SessionID] [program] For computer, username, password, and program, I'm good. Does anyone know of a way I can figure out which SessionID is assigned to a particular user logged on to a particular machine on the network? Alternately, is there a better way to go about what I'm trying to accomplish?

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  • Is there a media player that allows me to group together radio streams which are just mirrors of the

    - by rakete
    I find it really annoying that for some radio stations, which have two or more servers to cope with the network load, there is not one single entry in amaroks playlist but two or more entries. This makes it hard to pick the radio station from the list I like to listen to because all the entries are always shown with the last played track as name, and even if I only have a few radio stations in my list there will eventually be many different entries. And, if I use the keyboard shortcuts to navigate the playlist I always have to remember that radio station X has for example four entries in the playlist, so I have to press the shortcut for switching tracks four times to actually switch the to the next station. Now, ideally I would like some solution for amarok, but if someone knows of another media player that does this or something I would appreciate that information as well.

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  • How do I prevent internet access to a group of computers on my network?

    - by Kevin Boyd
    Well I have the following setup... Computer A , B and C are networked.... Computer A is connected to the internet, computer B and C are not setup for internet access currently but I guess its possible with some kind of setting they would eventually be able to access the internet and this is what I would like to prevent. In summary only A should have internet access while A and B and C should still be on intranet. Is this kind of config possible?, what kind of software or setup or tools would I need to achive this?

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  • Excel or Access: how to group several lines in a table and insert contents in columns? ("split column")

    - by Martin
    I have a table containing data of sold products (shown in the example on the left): Columns: Number of the order Product Name Attribute - specifies what is given in the following field "value", e. g. Customer Name or Product Variant Value - is the value of the Attribute Count - is the number of products of this variant sold in the order That means: Product B has 2 variants "c" and "d" Note that in Order 1 Product B was sold in Variant d only, because the letter "N" in field "D4" means "none". Note, that in OrdnerNo 3 Product B was sold only in Variant c, because for Variant d field "D9" is "N"!! This is confusing, but it is the structure of the original data (which I can not change). I need a way to convert the table on the left in a table like that on the right: one line for each product type Order Number Product Name Customer Name Count (number of products sold in this order) Variant - this is the problem, as it has to be filled with the So all rows with the same OrderNo and same product have to be grouped in to one, and I hope it is clear what I need. I tried to do it with Pivot Tables, but that fails, as the Count is always in each line, no matter if it has Value "N" or not and for the products without variants there is only one line for each order, however for products with variants there are several... So how could I create the right table with a VBA macro in MS Excel or maybe there is a trick in MS Access to do it directly or with an SQL query?

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  • How to copy symbolic links?

    - by Basilevs
    I have directory that contains some symbolic links: user@host:include$ find .. -type l -ls 4737414 0 lrwxrwxrwx 1 user group 13 Dec 9 13:47 ../k0607-lsi6/camac -> ../../include 4737415 0 lrwxrwxrwx 1 user group 14 Dec 9 13:49 ../k0607-lsi6/linux -> ../../../linux 4737417 0 lrwxrwxrwx 1 user group 12 Dec 9 13:57 ../k0607-lsi6/dfc -> ../../../dfc 4737419 0 lrwxrwxrwx 1 user group 17 Dec 9 13:57 ../k0607-lsi6/dfcommon -> ../../../dfcommon 4737420 0 lrwxrwxrwx 1 user group 19 Dec 9 13:57 ../k0607-lsi6/dfcommonxx -> ../../../dfcommonxx 4737421 0 lrwxrwxrwx 1 user group 17 Dec 9 13:57 ../k0607-lsi6/dfcompat -> ../../../dfcompat I need to copy them to the current directory. The resulting links should be independent from their prototypes and lead directly to their target objects. cp -s creates links to links that is not appropriate behavior. cp -s -L refuses to copy links to directories cp -s -L -r refuses to copy relative links to non-working directory What should I do?

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  • Can the Windows 8 Live SDK use another Microsoft Account other than the current user?

    - by Jerry Nixon
    Using the Windows 8 Live SDK you can have a user give you permission to their Microsoft Account. With this you can get their name and photo and more. But using the Live SDK appears to require the user of the app to use the same Microsoft Account as whoever is signed into the current session of Windows 8. In some scenarios, using a different account is very legitimate. I have simple sign-in working like a charm! This uses the same account. I can't find a way to do use another. Is it possible?

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  • I can't write to a folder which I'm a member of

    - by user3265472
    I'm trying to setup folder access to a group so that all members of that group can create/edit/delete files within the folder. # create my group and add a member sudo addgroup dev sudo adduser martyn dev Now, logged in as "martyn", check my user has been added to "dev" group groups martyn martyn : martyn dev Now I want to change the group ownership of my project folder so all members of that group can edit it and files/folders within it. sudo chgrp -R dev myproject Just to check: martyn@localhost:/var/www$ ls -l total 4 drwxrwxr-x 3 dev dev 4096 May 31 15:53 myproject Now here's where it fails. I want to create a file within myproject (logged in as "martyn", a member of "dev"): vi myproject/test ..but when I try to save the file I get the following error: "myproject/test" E212: Can't open file for writing Why, as user "martyn" which is a member of "dev", can I not write this file? Even if I create the file so it exists, change the ownership to "dev" then try to edit and save - I get the same error.

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  • Is it possible to know a user logged in on Ubuntu instantly?

    - by Mustafa Orkun Acar
    In fact, I am trying to restrict access to some websites for different users. I asked the question: Restrict access to some websites for different users. The given answer is ok; but as the owner of answer says, it works if users are locally logged in. That is; if the user logs out and logs in, restrictions are no more valid. So, I decided to run a script including the iptables commands for restrictions at every log in event. I want to know whether it is possible to know instantly the user logs in.

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  • Is it possible to allow the User Account to access the 'Volumes' without asking the Administrator's password?

    - by Tom
    Am the administrator of my Ubuntu system. Recently I added a new user account. But when ever the user tries to access or open the 'Volumes'(Drives where movies, songs and other files are stored) it asks for the Administrator's password. I created the user account to my other family members and I don't want to tell them my password. So is it possible to allow them to access the Volumes without asking Administrator's password ? UPDATE : Ubuntu was installed alongside Windows in my system. I will provide a screenshot of the Volume details -

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  • How to let Linux Python application handle termination on user logout correctly?

    - by tuxpoldo
    I have written a Linux GUI application in Python that needs to do some cleanup tasks before being terminated when the user logs out. Unfortunately it seems, that on logout, all applications are killed. I tried both to handle POSIX signals and DBUS notifications, but nothing worked. Any idea what I could have made wrong? On application startup I register some termination handlers: # create graceful shutdown mechanisms signal.signal(signal.SIGTERM, self.on_signal_term) self.bus = dbus.SessionBus() self.bus.call_on_disconnection(self.on_session_disconnect) When the user logs out, neither self.on_signal_term nor self.on_session_disconnect are called. The problem occurs in several scenarios: Ubuntu 14.04 with Unity, Debian Wheezy with Gnome. Full code: https://github.com/tuxpoldo/btsync-deb/tree/master/btsync-gui

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  • How to enable home directory encryption for a particular user?

    - by Ivan
    I prefer to have a dedicated "administrator" user for technical purposes and that was one I've set up during installation. I've also refused to encrypt the home folder of the user. Now, as I've added a user account for my actual work usage I want my (but not the "administrator") home folder to be encrypted. How to turn this on? If it is not possible then how to enable encryption for all users home directories on a system already installed? I've found questions and answers about how to disable it but am not sure how to enable it.

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  • Moving a copied layer group precisely in GIMP to make a paper of business cards?

    - by rautamiekka
    I found a template with space for 10 business cards, without extra space anywhere. Using GIMP 2.8.10, I made the design in top left slot and now I need to get that to the other slots. What is the best way to achieve that ? Using mouse is out of question for lack of precision and keyboard takes too long and still isn't completely precise, where we obviously can't afford lack of precision. Though, I'm no artist. The problem is that the slot's contents aren't anywhere same size as the slot itself.

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  • Adding group + items in Windows Explorer's pop-up menu?

    - by OverTheRainbow
    An application I use regularly is command-line based, and I would like to add the most used commands in the Windows Explorer's context menu that pops up when right-clicking on a file or folder. From what I read, a lot of programs in that menu are COM applications. Is there an easier way to add commands to the menu, as an alternative to opening a DOS box and typing commands? Ideally, it should work for XP, Vista, and 7.

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  • What is stable as Ubuntu in kernel space, but also cutting-edge as Fedora in user land?

    - by HRJ
    I am a long time Fedora user (since Fedora 6). Previously I have used Gentoo (for 2 years) and Slackware (for 5 years). The thing I liked about Fedora is frequency of package updates + great community. But lately I have noticed that Fedora is becoming too cutting-edge, nay, bleeding-edge. They changed the DNS client to be strict, without any warning, which broke some of their own packages for two Fedora releases. More critically, their LVM modules are not compatible across Fedora 12, 13, 14 (sometimes). Ubuntu is nicely polished but seems too stable for my liking. Some of the user-space applications are two major version numbers behind (even in testing or unstable or whatever they call it). Is there any Linux distro that has the stability of Ubuntu in kernel space and the bleeding edge in applications (especially harmless applications like, say, Stellarium)?

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