I just upgraded to 16.04. I notice that the Software center loads extremely slow. And that a lot of packages aren't there. They're supposed to, but a search gives me 'No application found'.   Is that a bug or feature?
This is the error I get when I open the software center. I've tried rebooting and running sudo apt-get update but I see no improvement. It worked earlier but I don't know what went wrong since then. I'm using Ubuntu 16.04 final release on a Dell Inspiron 15R. Any advice will be appreciated. Thanks in advance.  EDIT: The problem magically solved itself without me doing anything special (or maybe inadvertently doing something, I don't know). So I'd still like to get to the root of this.
How can I create and extract zip archives from the command line? $\operatorname{Aut}(\mathbb Z_n)$ is isomorphic to $U_n$. Lowering the throttling temperature in Windows 8 for a laptop I am running Ubuntu 12.04 on an IBM ThnkPad T42.  I just installed Gnome and Cinnamon but I am still using Unity.  The only problem is that in dash when I search for any application they don't appear.  I don't see recent applications either.  I fixed it by running unity --reset but the next time I turned on my computer it was broken again Why are badges on per-site-metas separate? Badges earned on per-site meta sites are separate from the main site, but reputation is carried over from the main site (because you don't earn any on Meta).   I perfectly understand keeping the rep the way it is (meta votes are too subjective to integrate them with rep) but the badge split seems odd to me.  Multiple badges are in fact impossible on Meta; Mortarboard, Bounty related badges. In addition badges in general are much harder to earn due to the lower amount of users and content; badges like Great Answer are nearly impossible.   As a result of this, most users on Meta end up with the easy 5-10 bronze badges for basic participation on Meta and not much else; stuff like Supporter and Critic that are hard not to get.   I understand the want to drive more people to meta, so perhaps badges are separate to institute a reward system; however this doesn't seem to work well since Meta badges (mostly) don't appear on the main site. This in combination of the 0 rep gain makes Meta feel almost not real. It also makes part of your progress (badges) on the main site invisible on Meta, and vise versa.  IMO the badges should be the same on both Meta and main site, but more Meta-oriented badges should be added to encourage use of Meta. This way Meta badges feel "real" instead of "Meta".  Is there an official reason for per site metas having separate badges? In a ring, I was trying to prove that for all $a$, $a0 = 0$.  But I found that this depended on a lemma, that is, for all $a$ and $b$, $a(-b) = -ab = (-a)b$.  I am wondering how to prove these directly from the definition of a ring.  Many thanks! Choose information when copying profile The Riemann zeta function $ζ(s)$ is defined for all complex numbers $s ≠ 1$ with a simple pole at $s = 1$. It has zeros at the negative even integers, i.e., at $s = −2, −4, −6, ...$.   My question: How one can obtain these roots. Can I deduct a contribution to a traditional IRA if I am also contributing to a 401(k) in the same tax year? multiplicative group of infinite fields What is the white smoke-like fog called? How to debug suspend? Evaluating $\int P(\sin x, \cos x) \text{d}x$ No notification (+15) for accepted answer Yesterday my answer was accepted, but I got no notification in top bar, moreover, top bar still shows that I earned 45 reps  while reputation tab shows right 60 rep.  Update: July, 11 Again having this problem: In the dropdown:  In the rep tab:  You see, first down votes in the drop down are missing. I'm looking for a Drupal Commerce Shipping in-cart estimate iMac with 8GB RAM -- memory always almost full I have a 27'' iMac (Late 2012, OS X 10.9.2) with 8GB RAM. The usage of memory is always above 7GB, even though I don't think I am running that much stuff. This leads to the occasional hanging of a program and occasional feeling of the computer being lagged.  The heaviest thing I am running is a Parallels virtualization of a defunct Windows laptop (for my Windows-only programs; work-related). Then I mostly surf with Chrome (10-20 tabs, some with youtube videos). Of course I have other things opened, like Mail, Evernote and a few more. But I don't think a 8GB RAM computer should be overwhelmed by that. I could be wrong.  I am willing to provide an export of processes from the Activity Monitor. I tried looking into it, of course, and I am running A LOT of small processes (unknown to me) -- system stuff I presume. I am a long-time PC user and I know my way around process management in PCs, but not on Mac.  What do you think? Do I just need more RAM or it doesn't feel like it?  Regards, Is the cube root of a prime number rational? When I'm sneaking around, I can move more slowly and quietly by holding shift.   But walking this way is really slow. I would like to move a little bit faster, but not full speed.    On a console I imagine you have much finer control over how fast you move with the joysticks. Is there any way to accomplish this on the PC (without an external joystick)?  Perhaps there is a console command or config file setting that will change the % speed modifier that holding down shift uses? `test` and `[` - different binaries, any difference? I noticed while answering another question that test and [ are different binaries, but the [ manpage pulls up test's. Besides the requirement for an ending ], is there any difference?  If not, why are they separate binaries instead of being symlinked? (They are also bash builtins, and bash doesn't show a difference either.) What is the difference between these two:     Suzuki was nearly close to go out of business just after the World War period.   Vs.     Suzuki was nearly close to going out of business just after the World War period.(from a video)   When talking about the past, do these two sentences different from each other? Like, if you use verbing(going) with infinitive(to) in the past, does it mean that there is another event happening? Or none.