Removing junk characters from file - NUL (^@) characters

The NUL character  in file shows up on windows in Notepad++ as shown below-

The NUL character shows in ^@ on Unix/Linux as shown below -

To detect NUL characters in a large file -

• Unix/Linux: Use grep command in Perl mode and give hex representation of the character: grep -P '\0' Filename
• Windows Text Editor: find all matches by 

  

  Notepad++

Now comes the final part how to remove these characters so that the file can be processed successfully -

cat OriginalFile | tr -d '\0' > TransformedFile

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