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I am trying to remove the last newline added to the file using bash script. I have got this - truncate -s $(($(stat -c '%s' foo.txt)-1)) foo.txt

here foo.txt the file name. but I want to parametrize the file name, I will pas the file name to the script and it should this remove the newline at last from that file. Request your help on this. I do not have linux in my machine and tried using cygwin but it is giving error while running the script.

Thanks

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  • here is example - <1#3#5#3 1#7#6 1#5#6#9#9>
    – Sugata Bagchi
    Commented Feb 1, 2015 at 4:02
  • each line is separated by new line, I tried to add but did not work, want to remove the last new line after 1#5#6#9#9
    – Sugata Bagchi
    Commented Feb 1, 2015 at 4:04
  • I have a tab delimited file, each line of which is separated by newline. I want to remove only the newline which is after the last record in the file. for this I have the code - <truncate -s $(($(stat -c '%s' foo.txt)-1)) foo.txt> but here the file name is hardcoded as foo.txt. I want to pass the filename to the bash script as a parameter so that it will remove the last newline from that particular file.
    – Sugata Bagchi
    Commented Feb 1, 2015 at 4:18
  • Is newline is the only character on last line?
    – anubhava
    Commented Feb 1, 2015 at 4:19
  • yes newline is the only char on last line
    – Sugata Bagchi
    Commented Feb 1, 2015 at 4:21

1 Answer 1

Reset to default
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To remove last line if it is newline use this sedL

sed -i.bak '/^[[:blank:]]*$/{$d;}' foo.txt
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  • hey thanks, but when I am opening using notepad++ the file remains same. can we remove the last byte using that code and include this in a script and call the script with a parameter file name.
    – Sugata Bagchi
    Commented Feb 1, 2015 at 4:37
  • Show output of tail -1 foo.txt | cat -vte
    – anubhava
    Commented Feb 1, 2015 at 4:39
  • that was the output in the console, not sure if I have done something wrong
    – Sugata Bagchi
    Commented Feb 1, 2015 at 4:49
  • I want to remove the newline after the last record and move up the cursor to the end of the last record. that other code is working , but I want it to parameterized with the filename. the other code mentioned by me is removing the last byte (which is for new line) from the file.
    – Sugata Bagchi
    Commented Feb 1, 2015 at 4:52
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    But you wrote above last line has only newline character.?
    – anubhava
    Commented Feb 1, 2015 at 4:56

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