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• Copy the contents of one partition to another partition hardrive

  - by user35319

  if i write this command in linux "dd if=/dev/sda1 of=/dev/sda2" it will copy the whole /dev/sda1 partition bit by bit to /dev/sda2 ......is there any way in WINOWS not in linux that i can just only copy the contents of one partition to another partition not the whole partition.....

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• Slow tab completion for paths in`make' arguments

  - by ajwood

  When I'm specifying an argument for make like PREFIX_PATH=/some/path/to/prefix/ I sometimes experience very slow completion for my directories (a few seconds). It's annoying when I've got several variables to specify. To get around the problem I've been typing out the variables first to get regular completion speed, then hitting home' to insertmake` that the start of my command line. What is happening and how can I fix it?

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• joining text files with 600M+ lines

  - by dnkb

  I have two files huge.txt and small.txt. Huge has around 600M rows and it's 14Gigs, each line has four space separated words (tokens) and finally another space separated column with a number. Small has 150K rows with a size of ~3M, a space separated word and a number. Both Files are sorted using the sort command, with no extra options. The words in both files may include apostrophes (') and dashes (-). The deisred output would contain all columns from the huge.txt and the second column (the number) from small txt where the first word of huge.txt and the first word of small.txt match. My attemtpts below failed miserably with the following error: cat huge.txt|join -o 1.1 1.2 1.3 1.4 2.2 - small.txt > output.txt join: memory exhausted What I suspect is that the sorting order isn't right somehow even though the files are pre-sorted using: sort -k1 huge.unsorted.txt > huge.txt sort -k1 small.unsorted.txt > small.txt Problems seem to appear around words that have apostrophes (') or dashes (-). I also tried dictinoary sorting using the -d option bumping into the same error at the end. I see two ways out of this but don't know how to implement any of them. 1) Any tips how to sort the files in a way that the join command considers them to be sorted properly? 2) I was thinking of calculating MD5 or some other hashes of the strings to get rid of the apostrophes and dashes, and do the sorting and joining with the hashes instead of the strings themselves an dat the "translate" back the hashes to strings, but leave the numbers intact at the end of the lines. Since there would be only 150K hashes it's not that bad. What would be a good way to calculate individual hashes for each of the strings? Some AWK magic? See file samples at the end. Thank you! sample of huge.txt had stirred me to 46 had stirred my corruption 57 had stirred old emotions 55 had stirred something in 69 had stirred something within 40 sample of small.txt caley 114881 calf 2757974 calfed 137861 calfee 71143 calflora 154624 calfskin 148347 calgary 9416465 calgon's 94846

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• Hidden features of Ubuntu

  - by Tom Brito

  That I know: In command line, use TAB to autocomplete the commands. You need just to select a text to copy it, and use mouse middle button to paste. Which other "untold" secrets Ubuntu hides? obs. I don't know which of the items I told are for any Linux or Ubuntu specific.

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• join videos split screen

  - by Richard

  I am looking for a command line tool to join 2 video files, however I want the videos joined split screen frame by frame instead of one after another. Any ideas? Seems this is not possible with ffmpeg.

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• Enter password only once for ssh

  - by usertest

  I use the following commands to sync folders. Each command requires me to type in the password. How can I group these commands to only enter the password once? Thanks. rsync -ave ssh /opt/lampp/htdocs/new/folder1/ [email protected]:/home/folder1/ rsync -ave ssh /opt/lampp/htdocs/new/folder2/ [email protected]:/home/folder2/ rsync -ave ssh /opt/lampp/htdocs/new/folder3/ [email protected]:/home/folder3/

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• How to find source of a symbolic link?

  - by Subbu

  Say fileA is a sym link to fileB. I have only fileB at hand and want to find all files that are sym links to fileB. Is there a command to show this in *nix?

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• Copying large number of files from one directory to another in linux

  - by Ritesh Sharma

  Hi all, I've a directory containing around 2.8 lacs of files. I want to move them to another directory. If I use 'cp' or 'mv' then I get an error 'argument list too long'. If I write a script like for file in ls *; do cp {source} to {destination} done then because of 'ls' command , its performance degrades. How can I do this?

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• Mass Checksumming tool for Windows?

  - by Daniel Magliola

  Hi, I'm looking for a command line tool for windows that will go over a directory tree (recursively) and output a list of all the files in there, and a checksum for each file (can be CRC, MD5, whatever). Esentially, what I want is to compare 2 big directory trees in 2 machines. I'm planning to take the outputs of running this tool in both, and diffing them to make sure they're identical. I appreciate any ideas.

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• grep not functioning correctly

  - by ak0

  I've been happily using grep for many years without any issues, but since today it quit working. During the past hour I tried this and that, but enough is enough, I'm posting the bastard here: On the simplest command like grep 'aaa' file.txt I'm getting this: grep: aaa: No such file or directory So grep does not interpret the first argument as the pattern as it should, but treats it as a path. Please help me, I'm going crazy '-(

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• Need to remove borders from multiple images

  I have a few hundred family images and they were all sent to us with borders that I would like to remove. Thankfully the borders are all the same size of 20 pixels and they are all .jpg so this will probably make things easier but im looking for a way to "batch process" all of them quickly so I dont need to open photoshop for each image and do it individually. Command line is preferred, the only big problem is they are mostly different sizes. Here is an example

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• Pretty/powerful CMD alternatives?

  - by w1sh

  I'm a Windows user and am just getting my feet wet with Python and some other languages. I keep having to deal with the Command Prompt, and it doesn't bother me, but I'm sure there are some free alternatives out there that look a lot nicer and probably pack a bigger punch. Any suggestions would be nice. Thanks!

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• How to change the default terminal emulator on Windows (cmd)?

  - by alex

  Is it possible to change the default terminal emulator on Windows (7 and 8 in particular) from cmd to, for example, Console2 or ConEmu? In essence, I want all command line tools, whether launched by double clicking, from "Run" or by other processes to use the custom terminal. This is a trivial matter on Linux, is it even possible on Windows? It would be especially helpful if this could be done via a script.

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• how to change ext of a file in Windows?

  - by Tim

  I downloaded a perl file from some webpage by opening it in my browser and saving it. But the saved file has a file name xxx.pl.txt. How can I save it into a file with pl as its ext? Also how to change a file's ext? Can I do these in command line? Thanks and regards!

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• Output directory tree as XML

  - by Jamie

  HI all, Is there a linux command which will output the structure of a given directory as XML? if there is, that would be awesome. Thanks very much

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• SHH running two commands at once?

  - by matthewsteiner

  So I want to run apache benchmark but while it's running, I need to run htop to see the memory and cpu usage. How can I do that? Putty (My ssh client) won't let me type in a command until ab is done running. Ideas?

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• Compressing files in windows

  - by the_lotus

  Is there a way to use the built-in windows file compression tool in command line? Instead of RightClick/Send To/Compress (Zipped) Folder. Windows Server 2003 Enterprise Edition Thanks!

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• How do I determine what file occupies a given sector in Linux?

  - by MT

  In Linux, I'd like to know how to find the file(s) if any which as using a particular sector on the hard drive. There is a similar question here regarding Windows, however I need a Linux command line solution (this is a headless system).

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• Notepad switches

  - by Homer

  What command line switches exist for Notepad? I found a few: /A <filename> opens file as ansi /W <filename> opens file as unicode /P <filename> prints filename Are there others?

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• How to add quotes in visual basic? [on hold]

  - by Poistenec

  I'd like to ask how is it possible to add quotes in VB. I'm trying to run command which contains quotes.. example: Shell("cmd.exe") SendKeys.Send("cd "c:\users\abc def" ") <<<<--- this line SendKeys.Send("{ENTER}") there is an syntax error. the problem is that I need to add quotes to some commands as there is a space in folderpath. As a beginner in VB I'm not really sure how to describe the poblem correctly so I hope you can see the it in my example :/ Thank you all in advance

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• using "uniq" and ignore the first chars, instead of words

  - by bks

  i have a list of files in a folder. the list of files is displayed using: ls | cat now, i want to pipe that to uniq so it'll ignore the first 6 charactes before comparing. is it possible? or perhaps i need to use another command? thank you

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• Linux: Can I create directories that don’t exist while creating a new file?

  - by deb

  I can do mkdir messages and then touch messages/hello.txt Is there a command that will do both - create the directory if it doesn't exist, and then the empty file? something like: touch -p messages/hello.txt Thanks in advance -- Deb

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• How do I paste into the Windows CMD prompt by using only the keyboard?

  - by Blinky

  My current technique is to right-click in the command prompt and then click paste. This bugs me - is there a better way?

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• Delete Directories smaller than x

  - by harp

  How can I delete Directories which are smaller than, say, 1000 KB? I already have a file list from the command: du -sk * | sort -n > sort.txt but I don't know how to proceed.

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• Linux/Windows/Unix/... file names: Which characters are allowed? Which are unescaped?

  - by java.is.for.desktop

  Hello, everyone! I can't find good information about which characters are allowed and which of them must be unescaped on command line in different operating systems. Please help! ;)

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