How do I remove newlines from a text file

Question

I have the following data  and I need to put it all into one line  I have this  22791     14336     22821     34653     21491     25522     33238     I need this  22791 14336 22821 34653 21491 25522 33238    EDIT None of these commands is working perfectly  Most of them let the data look like this  22791   14336   22821   34653   21491   25522

User · Answer

Expanding on a previous answer  this removes all new lines and saves the result to a new file  thanks to  tripleee   tr -d   n   lt  yourfile txt  gt  yourfile2 txt  Which is better than a  quot useless cat quot   see comments   cat file txt   tr -d   n   gt  file2 txt  Also useful for getting rid of new lines at the end of the file  e g  created by using echo blah  gt  file txt

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If the data is in file txt  then   echo    lt file txt    tr -d       The     lt file txt   reads the file and gives the contents as a series of words which  echo  then echoes with a space between them   The  tr  command then deletes any spaces   22791 14336 22821 34653 21491 25522 33238

User · Answer

use   head -n 1 filename   od -c    to figure WHAT is the offending character  then use   tr -d   n   lt filename   for LF  tr -d   r n   lt filename   for CRLF

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To also remove the trailing newline at the end of the file  python -c  s open  filename   r   read   open  filename    w   write s replace   n

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Was having the same case today  super easy in vim or nvim  you can use gJ to join lines  For your use case  just do   99gJ   this will join all your 99 lines  You can adjust the number 99 as need according to how many lines to join  If just join 1 line  then only gJ is good enough

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Using the gedit text editor  3 18 3    Click Search Click Find and Replace    Enter  n s into Find field Leave Replace with blank  nothing  Check Regular expression box Click the Find button   Note  this doesn t exactly address the OP s original  7 year old problem but should help some noob linux users  like me  who find their way here from the SE s with similar  how do I get my text all on one line  questions

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You are missing the most obvious and fast answer especially when you need to do this in GUI in order to fix some weird word-wrap    Open gedit Then Ctrl   H  then put in the Find textbox  n and in Replace with an empty space   then fill checkbox Regular expression and voila

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xargs consumes newlines as well  but adds a final trailing newline    xargs  lt  file txt   tr -d

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I usually get this usecase when I m copying a code snippet from a file and I want to paste it into a console without adding unnecessary new lines  I ended up doing a bash alias   i called it oneline if you are curious    xsel -b -o   tr -d   n    tr -s       xsel -b -i    xsel -b -o reads my clipboard tr -d   n  removes new lines tr -s     removes recurring spaces xsel -b -i pushes this back to my clipboard   after that I would paste the new contents of the clipboard into oneline in a console or whatever

User · Answer

paste -sd    file txt

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Nerd fact  use ASCII instead   tr -d   012   lt  filename extension       Edited cause i didn t see the friggin  answer that had same solution  only difference was that mine had ASCII

User · Answer

tr -d   n   lt  file txt   Or  awk    printf   s    0    file txt   Or  sed   a N   ba s  n  g  file txt   This page here has a bunch of other methods to remove newlines   edited to remove feline abuse

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perl -p -i -e  s  R  g   filename   Must do the job

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Use sed with POSIX classes  This will remove all lines containing only whitespace  spaces  amp  tabs    sed       space      d   Just take whatever you are working with and pipe it to that  Example  cat filename   sed       space      d

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Using man 1 ed     cf  http   wiki bash-hackers org doku php id howto edit-ed  ed -s file  lt  lt  lt    1  j n p     print to stdout  ed -s file  lt  lt  lt    1  j nwq     in-place edit

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Assuming you only want to keep the digits and the semicolons  the following should do the trick assuming there are no major encoding issues  though it will also remove the very last  newline      tr -cd   0-9    You can easily modify the above to include other characters  e g  if you want to retain decimal points  commas  etc

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perl -0777 -pe  s  n   g  input  output    perl -0777 -pe  tr  n  d  input  output

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I would do it with awk  e g   awk    0-9      a   a  0       END   print a    file txt    a disadvantage is that a is  accumulated  in memory    EDIT  Forgot about printf  So also  awk    0-9      printf   s     0    file txt   or likely better  what it was already given in the other ans using awk

User · Answer

tr --delete   n   lt  yourfile txt tr -d   n   lt  yourfile txt  Edit  If none of the commands posted here are working  then you have something other than a newline separating your fields  Possibly you have DOS Windows line endings in the file  although I would expect the Perl solutions to work even in that case   Try  tr -d  quot  n r quot   lt  yourfile txt  If that doesn t work then you re going to have to inspect your file more closely  e g  in a hex editor  to find out what characters are actually in there that you want to remove

User · Answer

You can edit the file in vim     vim inputfile   s  n  g

[linux] How do I remove newlines from a text file?

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