I tried to install systemd-container on brand new ubuntu 20.04 but I have following message: sudo apt-get install systemd-container Reading package lists... Done Building dependency tree        Reading state information... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation:  The following packages have unmet dependencies:  systemd-container : Depends: systemd (= 245.4-4ubuntu3) E: Unable to correct problems, you have held broken packages.  But it's not obvious how to fix it because when I try, getting this sudo apt install systemd=245.4-4ubuntu3 Reading package lists... Done Building dependency tree        Reading state information... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation:  The following packages have unmet dependencies:  policykit-1 : Depends: libpam-systemd but it is not going to be installed  systemd : Depends: libsystemd0 (= 245.4-4ubuntu3) but 245.4-4ubuntu3.2 is to be installed E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.  And so one till libpam-systemd sudo apt install libpam-systemd=245.4-4ubuntu3 Reading package lists... Done Building dependency tree        Reading state information... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation:  The following packages have unmet dependencies:  libpam-systemd : Depends: systemd (= 245.4-4ubuntu3) E: Unable to correct problems, you have held broken packages.  And at this point, we got a circle. EDIT: found that I can $ sudo apt download systemd-container  $ sudo dpkg --force-all -i systemd-container_245.4-4ubuntu3_amd64.deb   And it's working but I got dependency errors all the time. Is there any better workaround? EDIT 2: apt-cache output apt-cache policy systemd systemd-container systemd:   Installed: 245.4-4ubuntu3.2   Candidate: 245.4-4ubuntu3.2   Version table:  *** 245.4-4ubuntu3.2 100         100 /var/lib/dpkg/status      245.4-4ubuntu3 500         500 http://pl.archive.ubuntu.com/ubuntu focal/main amd64 Packages systemd-container:   Installed: (none)   Candidate: 245.4-4ubuntu3   Version table:      245.4-4ubuntu3 500         500 http://pl.archive.ubuntu.com/ubuntu focal/main amd64 Packages         100 /var/lib/dpkg/status  EDIT 3: Quick way to reproduce error on ubuntu 20.04: adam@adam:~/$ systemd-nspawn  Command 'systemd-nspawn' not found, but can be installed with:  sudo apt install systemd-container  adam@adam:~/$ sudo apt install systemd-container Reading package lists... Done Building dependency tree        Reading state information... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation:  The following packages have unmet dependencies:  systemd-container : Depends: systemd (= 245.4-4ubuntu3) E: Unable to correct problems, you have held broken packages.  Best
After upgrading from 10.04 to 12.04 I am trying to install different packages.  For instance ia32-libs and skype (4.0).  When trying to install these, I am getting the 'Unable to correct problems, you have held broken packages' error message.   Output of commands:  sudo apt-get install -f Reading package lists... Done Building dependency tree        Reading state information... Done 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.   After running this:  sudo dpkg --configure -a foo@foo:~$ sudo apt-get install -f Reading package lists... Done Building dependency tree        Reading state information... Done 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Old-style/Antique typesetting in LaTeX/TeX Book series my dad told me about. It involves space travel, clones, and an indigenous people with kangaroo tails My dad read a book series that he recommended to me last year. Now that I am ready to start it, neither of us can recall the title. He said there were several in the series but he can't recall how many.   The book is about traveling to a new planet, presumably with the goal of colonizing it. The crew are clones who have no memory. I think the goal was for the older original versions of the clones to transfer their consciousness into the clone bodies to be able to live on the new planet but something goes wrong.   There is an indigenous species on the planet who are humanoid but have kangaroo like tails.   The clone crew has markings on them that they don't understand until late. Apparently they are markings to indicate status or role on the new world. The person who they voted as there leader, it turns out, is marked as a servant or slave class. Is Linux Virtual Server old, or is it standing still? Based on this question: , LVS may be the right solution for my problem.   But when I went to its homepage , I found that LVS has been updated since Nov, 2008. The world's moving fast, and I don't know if LVS was obsolete or not.  Is LVS standing still, or there're some better solutions to replace it?  Thank you so much. I'm trying to give the best experience to users of a very huge system (like a CRM). It has a lot of forms and much of these have a lot of fields. My doubt is about if I should use a single column form (which raises too much vertical scrolling), or a two columns form (which needs less vertical scrolling and uses more horizontal white space) and a last one with four columns (which has few scrolling and uses almost whole white space to try to keep most of the fields above the fold).  It's important to say that our clients hate scrolling, and they always ask why we don't use the horizontal white space when we present a one column form).  So I'm little bit confused about it, because a lot of UX studies and good practices recommend to do not use/avoid multicolumn forms but the clients most of times ask multi column forms.  Our clients are very used to desktop programs and not everybody is very familiar with web based systems.  Below follows some possibilities I would like to share to illustrate an example of a complex form in the system with the three possibilities I mentioned:    In the example above I'm using the one column form (most recommended in UX studies), but with a very long vertical scroll.    In the second example I tried to reduce vertical space by using two columns.    This is the client's favorite one, 4 columns using white space and trying to keep everything above the fold.   The lengths of fields are based on the average of characters amount for each field.   I would like to know your opinion about the best approach to this case. We always change subject and verb positions in whenever we want to ask a question such as "What is your name?". But when it comes to statements like the following, which form is correct?        I don't understand what are you talking about.   I don't understand what you are talking about.      Another example        Do you know what time is it?   Do you know what time it is?      Another example        Do you care how do I feel about this?   Do you care how I feel about this? In first.bat, I use  var5=C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\bin\x86_amd64\ CALL scripts\vc64.bat %var5%   And in scripts\vc64.bat, I use  SET var6=%1vcvarsx86_amd64.bat CALL %var6%   But I get : 'C:\Programvcvarsx86_amd64.bat' is not internal or external command..... error.  If the path assigned to var5 has no space, then it is fine.  I tried several combination of quotations and %1vcvarsx86_amd64.bat, but no change.  How do I make it works with path with spaces?    To be more precise, suppose it is C:\a b c\  In first.bat:       SET var6=C:\a b c\  =====&gt;  '"C:\avcvarsx86_amd64.bat"' is not.....`      SET var6="C:\a b c\" ====&gt;   There should not be a b      SET var6=C:\a\ b\ c\ ====&gt;    Can't find the specified path      SET var6=C:\a b c\ + Using "%var6" ====&gt; There should not be a b     Update: Here is an example. Change a b to ab works.  call.bat in C:\  @ECHO OFF  SET var5=C:\a b\ CALL C:\1.bat "%var5%"  pause   1.bat in C:\  @ECHO OFF  SET var6=%~1Test.bat CALL %var6%  RMDIR /S C:\NoWorry   Test.bat in C:\a b Test.bat in C:\ab  @ECHO OFF  RMDIR /S C:\ThereIsNoSuchFolder Example:  A tall(,) green pole.   says that cumulative adjectives don't need comma. In my example, &quot;tall&quot; describes shape, and &quot;green&quot; describes color. So they are cumulative adjectives. But  says that &quot;tall&quot; and &quot;green&quot; are equivalent and coordinate adjectives ... I'm confused. Should there be a comma or not? What package should I use to typeset units? All  I just install a fresh new Ubuntu 16.04 on my new desktop which has a 8th generation Intel CPU i5 8600K. When OS installed, I found there is only one option in display setting: 1024 x 768 (4:3),  My monitor is a HDMI monitor with 1920x1080 resolution  Do anyone have any idea how to make the resolution setting right? Thanks.  BTW. I do not install any graphic card, I use the internal GPU of Intel Where does the curve $x^y = y^x$ intersect itself? This problem is quite easily solved by using logarithms and derivative and forming the function $f(x,y) = x^y - y^x$, however there are assertions that this problem can be solved without using either of the two. I can not see how one would proceed to solve this problem in the absence of logarithmic manipulation and differentiation. Can anyone shed some light on this? "She will be visiting" vs. "she will visit" When she goes to Mexico, she will be visiting Chichen Itza. When she goes to Mexico, she will visit Chichen Itza.  Is there a particular difference in meaning, or it is just the matter of style? ANOVA analysis with only mean and standard deviation Is there an open dense set $S \subset [0,1]$ such that $m(S)<1$? $m$ is the Lebesgue measure. I was thinking that: $\Bbb Q$ is dense and $m(\Bbb Q)=0&lt;1$ but it fails to be open, but maybe I could construct an open set from this fact, or also using that $(0,1)$ is a dense and open subset but $m(0,1)=1$.   Any hints or ideas will be very appreciated. Thanks. I'm calling a function in Python which I know may stall and force me to restart the script.   How do I call the function or what do I wrap it in so that if it takes longer than 5 seconds the script cancels it and does something else? Nodejs Nginx error: (13: Permission denied) while connecting to upstream I'm trying to run multiple Nodejs applications on Nginx server running on CentOS 7. I noticed that when I run a Nodejs app on some ports I get an 502 Bad Gateway error in the browser so I checked the error logs:  [notice] 12806#0: signal process started [crit] 12807#0: *13 connect() to 127.0.0.1:7777 failed (13: Permission denied) while connecting to upstream, client: **.**.99.58, server: myapp.com, request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:7777/", host: "myapp.com" [crit] 12807#0: *13 connect() to [::1]:7777 failed (13: Permission denied) while connecting to upstream, client: **.**.99.58, server: myapp.com, request: "GET / HTTP/1.1", upstream: "http://[::1]:7777/", host: "myapp.com"   when I change the app to listen to 8008 for example everything is working fine. I checked permissions and if the process is running as root and everything seems ok. I played with the timeouts as well but no result. Can anyone help? Emacs text-scale-adjust causes line numbers column to incrementally shrink and disappear I've set up emacs to display line numbers (global-linum-mode 1), and it works until I start enlarging the text via text-scale-adjust    The line numbers column starts to shrink, and disappears entirely after a few increments. When it has fully disappeared, further increments have no more effect on the left edge.    Is this a know issue? Is there a workaround?    Using GNU Emacs 23.1.1 in Ubuntu 10.04. Inform moderators migrating a question if the migration would have been normally blocked Symbolizing layer with graduated colors by date/time field? I've got a layer of polygons where each has a date associated with it.  I want to color the polygons with graduated colors, but I want the colors to start with the newest polygons and fade to the oldest polygons.  So far I haven't been able to find a way to do this in ArcMap (&lt;= 9.3.1) other than to create a new field and calculate some integer or float value based on the date.  Is it possible to use a date or time field directly?   The data is natively a date-time value There are far too many records to use any unique-value renderer Converting the date to a numerical field is an answer for a different question. Comment hint not disappearing when I start to type comment If I click "add comment", the comment hint (placeholder; "Request clarification or add information.") is not a hint, but editable text. If I delete the text and click outside of the comment then the hint appears as it should and when I click back into the comment box the hint disappears as it should.   I am on Internet Explorer 10.0.7.  Am I just oblivious and this is how it has always been (having to delete the comment hint), or is this a bug? Why do tuning forks have two prongs? I believe the purpose of a tuning fork is to produce a single pure frequency of vibration.  How do two coupled vibrating prongs isolate a single frequency?  Is it possible to produce the same effect using only 1 prong?  Can a single prong not generate a pure frequency?  Does the addition of more prongs produce a "more pure" frequency?  The two prong system only supports a single standing wave mode, why is that?