How do I remove junk characters in Unix?

How do I remove the first character from a Unix file?

You can also use the 0,addr2 address-range to limit replacements to the first substitution, e.g. That will remove the 1st character of the file and the sed expression will be at the end of its range — effectively replacing only the 1st occurrence. To edit the file in place, use the -i option, e.g.

How do I get rid of M in vi?

How I was able to remove it in vi editor:

  1. After :%s/ then press ctrl + V then ctrl + M . This will give you ^M.
  2. Then //g (will look like: :%s/^M ) press Enter should get all removed.

How do I remove a character from a Unix file?

Remove CTRL-M characters from a file in UNIX

  1. The easiest way is probably to use the stream editor sed to remove the ^M characters. Type this command: % sed -e “s/^M//” filename > newfilename. …
  2. You can also do it in vi: % vi filename. Inside vi [in ESC mode] type: :%s/^M//g. …
  3. You can also do it inside Emacs.

How do I remove special characters from a text file?

Or if you really want to remove the special characters in your file (as you state in the title of your question), you can use iconv -f … -t ascii//TRANSLIT . In this last case, the “special characters” will be approximated by normal ASCII characters.

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How do I remove the last character of a line in Unix?


  1. SED command to remove last character. …
  2. Bash script. …
  3. Using Awk command We can use the built-in functions length and substr of awk command to delete the last character in a text. …
  4. Using rev and cut command We can use the combination of reverse and cut command to remove the last character.

How do I remove the first and last character in Linux?

4 Answers

  1. what you really want to do is edit the file. sed is a stream editor not a file editor. …
  2. use a temporary file, and then mv it to replace the old one. …
  3. use -i option of sed . …
  4. abuse the shell (not recommended really): $ (rm test; sed ‘s/XXX/printf/’ > test) < test.

How do I remove the first character of a line in Unix?

2 Answers

  1. find . – type f -name “*.java” – to find all *.java files recursively.
  2. sed -i ‘s/.{10}//’ – remove the 1st 10 characters from each line in each found file ( -i option allows to modify the file in-place)
  3. this solution will work with GNU sed . With BSD sed you need -i ” , as -i requires an argument there.

What is M in git?

Thanks, > Frank > ^M is the representation of a “Carriage Return” or CR. Under Linux/Unix/Mac OS X a line is terminated with a single “line feed”, LF. Windows typically uses CRLF at the end of the line. ” git diff” uses the LF to detect the end of line, leaving the CR alone. Nothing to worry about.

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What is the M character?

M is a fictional character in Ian Fleming’s James Bond book and film series; the character is the Head of the Secret Intelligence Service—also known as MI6.

What is M in git diff?

I used git diff to see the difference after the overlay. As you can see, there is extra at the end of each line of text added. ^M character. … This character is used as a new line character in most other non-Unix operating systems including Microsoft Windows, Symbian OS and others.

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