The tag has no usage guidance.

learn more… | top users | synonyms

64
votes
5answers
21k views

What's the point in adding a new line to the end of a file?

Some compilers (especially C or C++ ones) give you warnings about: No new line at end of file I thought this would be a C-programmers-only problem, but github displays a message in the commit view: ...
0
votes
1answer
5k views

Script failing with “command not found: ^M”

When I try to run the following script in zsh, via the command /bin/zsh ~/.set_color_scheme.sh I get the following error: command not found: ^M The script has u+x permissions and it used to work on ...
3
votes
2answers
2k views

Shell script works when saved with nano but not when saved with Notepad++

I've been working on a bash script all day and have been testing on the machine I will be using it on. When I copy the script across from Notepad++ into a new file with nano editor inside SSH and ...
6
votes
1answer
12k views

No such file or directory but I can see it!

I'm trying to run a python script, on a headless Raspberry PI using winSCP and get the following error message: Command '"./areadetect_movie_21.py"' failed with return code 127 and error message ...
4
votes
3answers
5k views

How to bulk convert all the file in a file system branch between Unix and Windows line break format?

Everybody knows :-) that in Windows plain text files lines are terminated with CR+LF, and in Unix&Linux - with LF only. How can I quickly convert all my source code files from one format to ...
8
votes
6answers
37k views

Can sed replace new line characters?

Is there an issue with sed and new line character? I have a file test.txt with the following contents aaaaa bbbbb ccccc ddddd The following does not work: sed -r -i 's/\n/,/g' test.txt ...
2
votes
2answers
506 views

Directories are listed twice

I have something odd. I creates some directories using a very simple script : ... create all directories ( running under a user that has the correct rights ) e.g : mkdir -p ...
2
votes
5answers
12k views

Carriage return issue

I have this in a bash script DAY2="20130605"<Cr> echo "This is yesterday date:"$DAY2"end" Why is the output the following? It seems as though there is a carriage return in DAY2 but where is ...
81
votes
11answers
92k views

How to add a newline to the end of a file?

Using version control systems I get annoyed at the noise when the diff says No newline at end of file. So I was wondering: How to add a newline at the end of a file to get rid off those messages?
15
votes
7answers
21k views

How to test whether a file uses CRLF or LF without modifying it?

I need to periodically run a command that ensures that some text files are kept in Linux mode. Unfortunately dos2unix always modifies the file, which would mess file's and folder's timestamps and ...
7
votes
4answers
6k views

Replace \n by a newline in sed portably

I'm so confused with GNU sed, POSIX sed, and BSD sed's myriad of options. How do I replace literal \n with the newline character using these three sed types?
7
votes
1answer
702 views

shebang line not working with cr-lf

Why are the shebang parts of the following elementary scripts not working: $ cat hello.sh #! /bin/sh echo Hello $ ./hello.sh bash: ./hello.sh: /bin/sh^M: bad interpreter: No such file or directory $ ...
3
votes
3answers
147 views

How do I remove newline character at the end of file?

Let me clear about newline character: $ echo Hello > file1 ; cat file1 Hello $ echo -n Hello > file2 ; cat file2 Hello$ Here you can see that file1 has newline character at the end whereas ...
0
votes
4answers
144 views

How to delete the newline before EOF in a text/csv file via bash

Below is an example of the data I'm receiving in txt or csv file (seen in EmEditor): However, the final blank line is causing problems when uploading this data into my software. I need to have the ...
13
votes
2answers
9k views

Finding all “Non-Binary” files

Is it possible to use the find command to find all the "non-binary" files in a directory? Here's the problem I'm trying to solve. I've getting an archive of files from a windows user. This archive ...
13
votes
8answers
7k views

Replace string containing newline in huge file

Anyone know of a non-line-based tool to "binary" search/replace strings in a somewhat memory-efficient way? See this question too. I have a +2GB text file that I would like to process similar to what ...
7
votes
3answers
1k views

Remove trailing new line from 'clipboard' to prevent execution on the terminal?

Is there some way to run whatever you copy to the 'clipboard' through some sort of filter? Ideally to strip out the trailing newline from something you copy, so that it doesn't auto-run in the ...
6
votes
4answers
26k views

How to add a carriage return before every newline?

I have a file that only uses \n for new lines, but I need it to have \r\n for each new line. How can I do this? For example, I solved it in Vim using :%s/\n/\r\n/g, but I would like to use a script ...
5
votes
5answers
330 views

Automatic transformation of newlines in shell variable assignment

This came out of one of my comments to this question regarding the use of bc in shell scripting. bc puts line breaks in large numbers, e.g.: > num=$(echo 6^6^3 | bc) > echo $num ...
4
votes
3answers
19k views

Why can't find -regex match a newline?

Why does this fail? touch "$(printf "a\nb")"; find . -regex './.\n.' I also tried these, none of which work: find . -regextype posix-extended -regex '.\n.' find . -regextype posix-awk -regex ...
4
votes
3answers
922 views

How to skip file in sed if it contains regex?

I currently use the following simplified command to remove trailing whitespace and add a newline at end of file where needed: find . -type f -exec sed -i -e 's/[ \t]\+\(\r\?\)$/\1/;$a\' {} \+ As ...
3
votes
4answers
106 views

Not able to cat a string from a file under a string of another file

I have encountered a strange issue in concatenating the files using the cat command. I have two files with one string in each of them: file1: ABC file2: DEF Either I do cat file1 file2 or ...
2
votes
1answer
55 views

Neutralisation of data from Windows to Unix

I just noticed that other platforms files (Windows) had to cause me many bugs, like here, in my regexes. Mostly, the line ending ^M. There seems to be many ways to do dos2unix, like here described. ...
2
votes
2answers
339 views

Removing consecutive newlines with ed

Input file: 1 line1\ 2 line2\ 3 line3\ 4 \ 5 line4\ 6 \ 7 \ 8 line5\ Desired output: 1 line1 2 line2 3 line3 4 5 line4 6 7 line5 Is it possible with POSIX ed? Removing the trailing backslashes ...
1
vote
1answer
1k views

sed: N command does not read single line

Why sed's N command does not read single line? # single line without \n $ echo -en 'abc' | sed -n 'N;p' $ # I expected 'abc' # single line with \n $ echo -en 'abc\n' | sed -n 'N;p' $ # I expected ...