I tried to update the system (Ubuntu 12.04 LTS "precise") with the Update Manager. &nbsp;It shows 2 important security updates for language-selector-common (0.79.4) and language-selector-gnome (0.79.4), but they can't be selected. &nbsp;They should be, as any package in Update Manager and as I had done a lot of times.  I check in Synaptic and found the two packages marked with an ! symbol in gray; I don't know what it means. &nbsp;The installed version is 0.79, for both packages. &nbsp;I mark them for update, and Synaptic asks to mark for delete language-selector-gnome, ubuntu-desktop and ubuntu-standard. &nbsp;I don't know if I should delete them or do something different.   If I try to update language-selector-gnome first, it asks to delete ubuntu-desktop. If I try to apply the changes, Synaptics shows a message saying that it can not update because it has language-selector-commons as an unsolvable dependency (it needs language-selector-common 0.79.4).   What should I do? &nbsp;Leave it without updating? &nbsp;If update, which would be the correct order in the process? ("first delete this package, then update the other, then reinstall a third" or something like that). &nbsp;Is the bug in Update Manager, instead?  I guess it has something serious; I've checked the changes report in the un-checkable update and it shows:  "SECURITY UPDATE: possible privilege escalation via policykit UID lookup race. - dbus_backend/ls-dbus-backend: pass system-bus-name as a subject instead of pid so policykit can get the information from the system bus."  It is confirmed in the National Vulnerability Database (linked from CVE-2013-1066), it links also to a bug for the update (0.79.4), not for the package to be updated (0.79):    So even the update should be reviewed.  Thanks in advance.
Ubuntu 11.10 is installed, and I have updated my system via Ubuntu Software Centre, and after the update 3 updates remain in the list. But I am unable to select them, the tickboxes cannot be checked and Ubuntu Software Centre gives no error when I try to check.  Also, below it says "There is no update to be installed" and even though there seems to be updates Install Updates button is unclickable.  What should I do in order to install these updates?
Why didn't Gimli know Moria had fallen? How do you persuade an organization to value UX? UX is such an underrated field in a lot of industries. I wonder how companies consider employing UX designers and even heavily valuing their suggestions. Some big companies happen to see the light and invest in UX, and that keeps them on top of others. However, UX people rarely make it to the top management. In Don Norman's talk (  ), out of so many UX people (I don't know exactly), only two were vice presidents. I assume that there are even less influential UX designers in developing countries, and that's what makes it even harder for people like me. In the same talk, Don Norman suggested that UX designers should approach their executives like marketing people, showing how investing in something will affect profit. Perhaps, it's the best thing to do but it has to be mastered for it to be executed successfully.   I'm a fresh grad and am looking for a job. I think, working for a company with a more conventional job description would be the way to go. When I'm already influential enough, I'll go up to the executives and show them how UX will improve sales (in whatever industry it is. I just want to do UX)  Do you do UX as consultants or are you employed? How do you persuade companies to invest in UX? Are you lucky enough to be employed by people who you didn't have to persuade to value UX? Some of code I read in trigger is like this    for(account a: [select id  from account where id in: mapAccount.keySet()]) {     //code      }    some are like   List&lt;Account&gt; listAccount = [select id  from account where id in: mapAccount.keySet()];   for(Account a: listAccount ){   //coode   }   Are those same from performance view?which one is better? Do sensors wear out? We all know that shutters wear out and they have a limited number of actuation's.  The question I have is, do sensors wear out too? Do they suffer any kind of damage after each shot?  Should I be concerned about this or is the sensor lifespan way longer than the shutter lifespan? Creaking from cranks/spindle. How to fix? How much longer will my 10 year old frame last? how to install the DDE to the ubuntu 20.04? I have installed the Ubuntu 20.04, and want now I want to install Deepin Desktop Environment (dde)  My steps are:   add the ppa and install using apt  sudo add-apt-repository ppa:leaeasy/dde sudo apt-get update sudo apt install dde    But during the command sudo add-apt-repository ppa:leaeasy/dde I get the following error:  $ sudo add-apt-repository ppa:leaeasy/dde  You can install deepin desktop environment by run  sudo add-apt-repository ppa:leaeasy/dde sudo apt-get update apt-get install dde ------ Ubuntu Bionic: https://drive.google.com/file/d/1xkQPb4tWocknuYeY-t41W--kz-9SSL0V/view?usp=sharing ------ Important Issue: Q: Can dde on Ubuntu 16.04? A: Sorry, the dde depends on qt version above than 5.6.      If you want to install dde, please upgrade to 17.04 or above.  More info: https://launchpad.net/~leaeasy/+archive/ubuntu/dde Press [ENTER] to continue or Ctrl-c to cancel adding it.  Hit:1 http://in.archive.ubuntu.com/ubuntu focal InRelease Hit:2 http://in.archive.ubuntu.com/ubuntu focal-updates InRelease                                      Hit:3 http://in.archive.ubuntu.com/ubuntu focal-backports InRelease                                    Ign:4 http://ppa.launchpad.net/leaeasy/dde/ubuntu focal InRelease                                      Hit:5 http://security.ubuntu.com/ubuntu focal-security InRelease            Err:6 http://ppa.launchpad.net/leaeasy/dde/ubuntu focal Release             404  Not Found [IP: 91.189.95.83 80] Reading package lists... Done E: The repository 'http://ppa.launchpad.net/leaeasy/dde/ubuntu focal Release' does not have a Release file. N: Updating from such a repository can't be done securely, and is therefore disabled by default. N: See apt-secure(8) manpage for repository creation and user configuration details.   I get the similar error with sudo apt-get update :  $ sudo apt-get update Hit:1 http://in.archive.ubuntu.com/ubuntu focal InRelease Hit:2 http://in.archive.ubuntu.com/ubuntu focal-updates InRelease                                       Hit:3 http://in.archive.ubuntu.com/ubuntu focal-backports InRelease                                     Ign:4 http://ppa.launchpad.net/leaeasy/dde/ubuntu focal InRelease            Hit:5 http://security.ubuntu.com/ubuntu focal-security InRelease Err:6 http://ppa.launchpad.net/leaeasy/dde/ubuntu focal Release   404  Not Found [IP: 91.189.95.83 80] Reading package lists... Done E: The repository 'http://ppa.launchpad.net/leaeasy/dde/ubuntu focal Release' does not have a Release file. N: Updating from such a repository can't be done securely, and is therefore disabled by default. N: See apt-secure(8) manpage for repository creation and user configuration details.   How can I install dde ? A calculus problem with functions such that $f''(x) = g(x)$ and $g''(x) = f(x)$ Per-chapter bibliographies in biblatex I'm really new in using biblatex, compile the sample placed in , but what I get is    1.1 Foo    Some text [B02x ].    1.2 Bar    Some text [B02y ].   Do not get the bibliography by chapters, or the global references.  Really not remains to be done   \documentclass{report}  \usepackage[style=alphabetic]{biblatex}  \addbibresource{references.bib}  \begin{document}  \chapter{First chapter}  \section{Foo}  Some text \cite{childs_temperature}.  \printbibliography  \chapter{Second chapter}  \section{Bar}  Some text \cite{hashemian}.  \printbibliography  \newpage  \printbibliography  \end{document}   And the references.bib    @BOOK{childs_temperature,   title = {Practical Temperature Measurement},   publisher = {Butterworth - Heinemann},   year = {2001},   author = {Childs, Peter R N},   address = {Great Britain},   edition = {1},   isbn = {0 7506 5080 X}   }    @PHDTHESIS{hashemian,   author = {Hashemian, Hashem Mehrdad},   title = {Measurements of dynamic temperatures and pressures in nuclear power plants},   school = {{The University of Western Ontario}},   year = {2011},   type = {PhD {T}hesis}   }   I need to obtain references by chapter and global cited references, but i don't know how compile. I would like to take the full citation of a reference in my BibTeX file and write commentary in-line after it.  A \fullcitation{id} command would be perfect.  I would like to use it as:  \fullcitation{id1}   This paper talks about A with applications to B.  \fullcitation{id2}   This paper considers how C affects A.  Whenever the \fullcitation{id} command appears, I want it to be replaced with the full reference, including authors, title, journal, and date.  Is this possible? My PC was working yesterday without any problem. I shut it down and tried to open this morning. It prints out these messages on the black screen:  systemd-udevd[713]: failed to execute '/bin/systemctl' '/bin/systemctl start --no-block nvidia-persistenced.service': No such file or directory  systemd-udevd[852]: failed to execute '/bin/systemctl' '/bin/systemctl stop--no-block nvidia-persistenced': No such file or directory   It then continued with the login screen. I entered my password and pressed enter. It waited for a while and the login screen reappeared again.  How can I fix the problem? Question is about Ubuntu release process. Are migrations from n to n+1 releases expected?  Assuming we have server with installed Ubuntu 14.04 LTS. Will it be smoothly upgradable to Ubuntu 16.04 LTS via apt-get upgrade ?  Assumptions:   scope is software therefore we assume that given hardware is supported on both releases (upgrading from and to) that's why, always before upgrade you are asked to make backup to be able to revert in case of failure How do I interpret the Mann-Whitney U when using R's formula interface Flex-box: Align last row to grid I have been denied a visa several times in a row. How does one deal with such serial refusals? I currently have an ec2 &quot;t2.nano&quot; instance up and running. I would like to switch to a &quot;t2.micro&quot;. In order to do that, I need to stop the instance. But I would lose my IPv4 address in the process. And I do not want that (because I have several ssh tunnels up and running from rasps in the wild that are currently hard coded to connect to this IPv4 address). I decided to create an Elastic IP address. But I understand that by creating an Elastic IP address and assigning it to my current ec2 instance, I would lose my current IPv4 address too. Is it possible to create an Elastic IP address from the current IPv4 address of my ec2 instance? If so, how can I do this operation? Why do first years cross the lake to get to the castle? It makes sense to keep them together, and to have them arrive in the Great Hall separately from the rest of the school for the Sorting. But why the boats? The lake crossing is dramatic, but inefficient - as we see in book 4 when Dennis Creevey falls in the lake during the storm.   Is there a canon (books/movies or JKR) explanation for why the first years come up from the train in boats instead of carriages? Why do birds sitting on electric wires not get shocked? When we touch electric wires, we get shocked. Why don't birds sitting on electric wires not get shocked? Number of homomorphisms between two cyclic groups. Is there a word for happiness made possible by a tragic situation? I frequently find myself needing a word to express happiness that acknowledges a tragic or unfortunate circumstance underpinning that happiness. Preferably the word could have both adjective and verb forms. For example, "Gregory [verb-ed | felt adjective about] the balmy February day, suspecting it was yet another consequence of catastrophic and irreversible climate change."  "Bittersweet" is close, but not precisely right. It implies ambivalence rather than genuine gladness. "Schadenfreude" is also in the neighborhood, but I don't want to imply that the tragic part of the situation is what causes the pleasure. (Also, I recognize that the word may not quite exist in English, and I don't know if this is forbidden for this forum, but I'd welcome a loan word or phrase if there's a better one.)