Is gksudo still in use or is it officially removed? It is still available in the Ubuntu tutorial: () and what would be the replacement for it?  Also what did the gk part stand for? Graphical?  Edit:  gksudo was Removed a replacment for it would be sudo -i
I have always recommended pressing ALT+F2 and typing for example gksu nautilus or gksudo nautilus both are equivalent; to run graphical programs with root privileges.  However, I have just installed raring on a test system and this no longer works.  gksu and gksudo are not installed as part of a default raring install; though they are in the repositories. In 12.04 at least gksudo was just a symbolic link to gksu  The reasons I have always done this are because while it is often safe to use sudo under some circumstances it can cause problems with graphical applications because gksu has you running the program as root while with sudo you are running as yourself but with elevated privileges.  This can mean you inadvertently change the owner of critical system files.  This can cause problems.  This reasoning is explained better here:         Why was command removed from a fresh install and what should we be using instead?
The final state of 1000 light bulbs switched on/off by 1000 people passing by There are  1000  light bulbs and 1000 tutors. All light bulbs are off. Tutor 1 goes flipping light bulb 1,2,3,4... tutor 2 then flips 2,4,6,8... tutor 3 then 3,6,9...etc until all 1000 tutors have done this.  What is the status of light bulb 25? 93? 576?  Is there a general solution to find out the status of any light bulb?  How many light bulbs are on after all 1000 tutors have gone by?  Not homework but a UK university interview question. Please help. I know I can set the render border with Ctrl+B and dragging a box.  But is there  a way I can exactly specify the border dimensions? How does the system determine which one close reason should be displayed on a closed question, given the close votes? When voting to close a question, it's possible for users to vote for any close reason, even if others have voted for different reasons. However, in the end, once the question reaches five close votes for any reason, only one of those reasons can be displayed.  How does the system determine which one close reason to display, given the votes made by users? Matplotlib make tick labels font size smaller I have:  \documentclass[a4paper,11pt]{report}   with no special customisation.  In one page, at the end of a section, I have a big figure with two paragraphs of text below it, and these two paragraphs are not enough to fill up the rest of the page.  When I use the \documentclass as above I get some extra white space at the end of the page, which is fine: the vertical spacing from the figure caption and between the two paragraphs is standard and correct.  But if I switch to:  \documentclass[a4paper,11pt,twoside]{report}   I get extra blank space between the figure caption and the 1st paragraph and also between the 1st and 2nd paragraph.  I want to use twoside to set the headings with fancyhdr. How can I get rid of these ugly white spaces? Punctuation with units I remember reading somewhere that if a unit is abbreviated as one character, there must not be a space between the number and the unit (e.g., 5m, 26K). If the unit is abbreviated as two or more Characters, there must be a space between the number and the unit (e.g., "10 km", "USD 5").   Can you please help me find the source again? Is this recommendation correct? Sufficient conditions for $x, Ax, A^2x, ...$ being linearly indepedent Show that if $u$ is harmonic in $\mathbb R^n$ and $u=o(|x|)$, then $u$ is a constant.(Hint: use the solid version of the mean value property $u(x)=\frac{1}{\omega R^n} \int _{B_{R(x)}} u(y)dy$, and estimate $|u(x)-u(x')|$.)  Can anyone tell me how to use this hint? What do the slashes mean in the character tables? I've been reading the PF core rulebook, but confused over some of the data in the Character tables, and not found anywhere in the book that explains it, so wondering if someone could explain it?  Taking the Monk class table for example:     Level | Base Attack Bonus | ..... | Flurry of Blows Bonus      1st       |       +0          |   ....    |        -1/-1      2nd       |       +1          |   ....    |        +0/+0      ...      ...      16th  |       +12/+7/+2   |   ....    |        +14/+14/+9/+9/+4/+4/-1      17th  |       +12/+7/+2   |   ....    |        +15/+15/+10/+10/+5/+5/+0      18th  |       +13/+8/+3   |   ....    |        +16/+16/+11/+10/+6/+6/+1   What do the slashes between the bonuses mean? Display maximum possible count of sites in footer How do electromagnetic waves travel in a vacuum? This is perhaps a total newbie question, and I will try to formulate it the best I can, so here it goes. How does an electromagnetic wave travel through for example, the vacuum of space?   I usually see that waves are explained using analogies with water, pieces of rope, the strings of a guitar, etc, but it seems to me that all those waves need a medium to propagate. In fact, from my point of view, in those examples the wave as a "thing" does not exist, it's just the medium that moves (involuntary reference to The Matrix, sorry).   But in space there is no medium, so how does a wave travel? Are there free particles of some sort in this "vacuum" or something? I believe , so supposedly there isn't a medium for the wave to travel through.   Moreover, I've seen other answers that describe light as a perturbation of the electromagnetic field, but isn't the existence of the field, potential until disturbed? How can it travel through something it does not exist until it's disturbed by the traveling light in the first place? (this last sentence is probably a big misconception by me). I'm trying to find  $$\lim_{n\to\infty}\frac{n}{\sqrt[n]{n!}} .$$   I tried couple of methods: Stolz, Squeeze, D'Alambert  Thanks!  Edit: I can't use Stirling. laptop fails to suspend or hibernate (wakes up after 2-5 seconds without user interaction) "To be subject to" vs. "to be subjected to" Kuratowski-Zorn Lemma with pre-order (quasi-order, proset) instead poset? What would happen if we would use pre-order (there is no weak-antisymmetry, only reflexivity and transitivity) in  Kuratowski-Zorn Lemma instead of partial order?      Suppose that we have set P which is preordered and  has the property   that every chain (i.e. totally ordered subset) has an upper bound in   P. Then the set P contains at least one maximal element.   Is this statement true in ZFC? If not, what can we postulate to make it true? I think it can be false, or at least we need to postulate something more (or not?), but I am just missing something and don't see it.  P.S.      I wanted to put tags with combination of words like: Kuratowski Zorn Lemma Pre-order Proset, but it seems that none of them exist and I need to have 300+ reputation to create new ones, thus I only typed (set-theory) :( If someone with bigger reputation could make this topics' tags more precise, I would be grateful :) Run a nohup command over SSH, then disconnect I want to execute a script, start.sh on a remote server which runs this:  nohup node server.js &amp;   Naively, I call SSH like this:  ssh myserver &lt;&lt;EOF ./start.sh &amp; EOF   This starts the script, but leaves the session connected. I want to follow this step with other commands in a script, so that's no good.  How can I SSH to the remote machine, launch a nohup command into the background, then disconnect? I suppose I could put the SSH process itself into the background, but that doesn't seem right. Graph theory: Tree holds two sub-tree with an amount of vertices Properties of $x_k=\frac{a_{k+1}-a_{k}}{a_{k+1}}$ where $\{a_n\}$ is unbounded, strictly increasing sequence of positive reals I want to apply a macro to all the cells of a column with the cell content as the input to the macro. Is this possible?  For example if the cell contents have the word TEST, the macro should take TEST as its argument. How to get my own IP address and save it to a variable in a shell script? How can I get my own IP address and save it to a variable in a shell script?