Simultaneous copy to an external HDD I have one folder in my internal HDD. I need to copy the folder to multiple external HDD. If the copy can happen simultaneously, it will help me gain time.  Folder name is "AllFiles" Folder is located at the root of the internal HDD. /AllFiles  No to copy it to /dev/sdb, /dev/sdc and /dev/sdd  I saw some command lines using cat and tee. I couldn't test it because it was for a specific purpose and the destination was a network folder.
Parallel file copy from single source to multiple targets? I have a several large files on optical media I would like to copy to multiple targets - in this case I have two hard drives attached to the same computer. Is there a utility that can function like:  copy source target1 target2 ... targetN
SQL-Server: The backup set holds a backup of a database other than the existing The merits of a partitionless filesystem I ran into something a couple of weeks ago that I'd never seen before: A filesystem (ext3 I believe) installed to a storage device without a partition. In essence /dev/sdb was the entire filesystem. I know many filesystems can be extended into empty space, so doing this allows extending without dealing with LVM or some other kind of volume manager, but are there any other advantages for setting up storage this way?  The specific case I saw was as the ephemeral data volume for a number crunching server, the boot and root volumes were traditional partitions on a different storage device entirely. - Reducibility of polynomials modulo p "Duplicate of...[deleted post]" If $d(x,y)$ is a metric, then $\frac{d(x,y)}{1 + d(x,y)}$ is also a metric On webmail every user gets error "ERROR: Message not sent. Server replied: 354" while sending mails.   But mails are sent properly and reaches properly.  Can you tell me where is problem, and why it is occurred?  UPDATE: I found in some resources that this is not an error but standard information message. On the other side, it's annoying. Can you tell me if it is a true, and if it is how can I avoid it? How can I install Visual Studio? How can I install Visual Studio?    I'd prefer to use it in Wine or PlayOnLinux if possible. How to change value of ArrayList element in java I have dual US and UK citizenship, but the US citizenship has only just been realized (wasn't aware I had claim to US citizenship earlier).  Unfortunately I haven't received my US passport yet. Can I still travel to the US only using my UK passport?  I understand that the US does require citizens to travel on a US passport, but would they even know that I am a dual citizen if I've only ever traveled on my UK passport? (Especially considering that my US passport has never been used before in any form - as I haven't received it).  If I was only entering the US for a small trip,  would it show on the screen that I also have US citizenship when they scan my UK passport? I created an ext4 partition to back-up my files to, and partitioned it for 102GB in Gparted using a live USB. After I booted into Ubuntu, I opened Disk Utility, and it said that the partition was actually 108GB. Confused, I opened the mounted partition in Nautilus, and it said the partition was only 98GB.  Which is correct? Did I partition it wrong? What is the complexity of finding SHA-1 collisions? Given the , what is the complexity of finding a SHA-1 collision?  Marc Steven's  is still detailing about 260. Does the previous complexity still hold? Prove that $||x|-|y||\le |x-y|$ Let's say I use a  with a lot of code inside. To improve readability and reusability I'd like to use helper/private methods. However, a Drupal .module file is not a class.  The idea is to split big methods from this file into more readable and reusable smaller methods.  What is the correct way to call helper/private methods from a Drupal .module file? Find longest repeating string based on input in perl (using subroutines) $SL_n(\mathbb R)$ is a subgroup of kernel of $f\in$ Hom$(GL_n(\mathbb R), A)$, $A$ is an abelian group. Try to prove the following proposition.     $SL_n(\mathbb R)$ is a subgroup of kernel of $f\in$ Hom($GL_n(\mathbb R), A)$, where $A$ is an abelian group.   My first attempt is to show that $SL_n(\mathbb R)$ is in form of $ABA^{-1}B^{-1}$, then it's clear that $ABA^{-1}B^{-1}$ is in $ker(f)$. However, there exists an elementary row reduction matrix, i.e. $E_{ij}(m)$ adding m times $j$-th row to $i$-th row. Then $E_{ij}(m)\in SL_n(\mathbb R)$. Now, it is possible that $E_{ij}(m)$ is not in $ker(f)$. Then I try to find any relation between $\mathbb R^{\times}$ and $A$, but, except knowing they are both abelian groups, I cannot figure out what else connects those two group. Could you give me some hints? How should I calculate $\lim_{n\rightarrow \infty} \frac{1^n+2^n+3^n+...+n^n}{n^n}$ How should I calculate the below limit  $$\lim_{n\rightarrow \infty} \frac{1^n+2^n+3^n+...+n^n}{n^n}$$ I have no idea where to start from. How to Send Byte array To Server How can I draw a tangent ending smoothly in a circle? I'm trying to draw a tanget on a circle, but I'm not happy with the result I get from the tangent option.    particularly, I'd like to have the lines ending smoothly in the circle. The problem is shown enlarged here:      Here is the code for this mininmal example  \documentclass{standalone} \usepackage{tikz} \usetikzlibrary{calc}  \begin{document}   \begin{tikzpicture}[thick]     \node[draw,circle,xshift=2.2cm] (big) [minimum size=25mm] {};     \node[draw,circle] (small) [minimum size=2mm] {};     \draw (small.south) -- (tangent cs:node=big,point={(small.south)});     \draw (small.north) -- (tangent cs:node=big,point={(small.north)},solution=2);    \end{tikzpicture} \end{document}   I'd greatly appreciate any advice allowing me to do this! How can I install Windows software or games? Can .exe and .msi files (Windows software) be installed in Ubuntu? Update: (Originally this was a comment, but I thought it was worth sharing here at the top.)   In the original question, I asked if there was a polite, socially-acceptable way to ask an Indian co-worker not to use the phrase "do the needful", as I didn't care for it.   In the years since I asked this question I've asked many people about the phrase. To the Indians I've asked in-person, it's not rude in any way. To Americans I've asked it varies anywhere from "I don't like it, but I don't mind it" to "It's very rude and makes me angry when I see it".   Through a long series of edits the question morphed and I wasn’t able to delete it because it had upvoted answers. The question, as it stands now, has no other answer.  I guess, though, if you're non-Indian and you find it rude, or if you're Indian and you've never realized someone might find it rude, this post may still have merit. Hopefully it does. It certainly has gotten a lot of views. Best wishes, folks.  End Update. See below for what's left of the actual question.    "Do the needful."   It's a phrase that I've only seen used in email, and I find it . . . presumptuous (maybe even rude). Regardless of prefacing with "please", one is commanding rather than asking for assistance.  I've only seen it used by those of Indian origin, so I've simply not mentioned it at all rather than worry about any cross-cultural offense that may come of bringing it up.  But still, I don't understand why it's used. Why not request rather than make two statements, one factual, one imperative?  For example, why would one use:        I'm told you have Jane's email address. Please do the needful.      instead of,        Would you send me Jane's email address?