how replace null characters in UNIX?

Question

I had this string and to show the special characters and then replace

0|A0140017511|1|DEMÁS TEMAS|�|�|2014-08-01

I want this

 0|A0140017511|1|DEMÁS TEMAS|@|@|2014-08-01

$ xxd -p file.txt

307c41303134303031373531317c317c44454dc381532054454d41537c00
7c007c323031342d30382d3031

Can you also add the output of `xxd -p file.txt` to your question? So we can generate your input without losing foreign characters. — oguz ismail, Apr 25 '19 at 16:46
does it have to be `^@`? Is a single character also okay, like `@` for instance? — oguz ismail, Apr 25 '19 at 16:52
Is this an XY question for "How do I remove/replace NUL bytes in a string"? — that other guy, Apr 25 '19 at 16:55

oguz ismail · Answer 1 · 2019-04-25T17:32:25.270

2

From xxd's output I can tell that you're trying to replace NULs with something else. To replace them with a single character, for example -, use tr:

$ tr '\0' '-' < file
0|A0140017511|1|DEMÁS TEMAS|-|-|2014-08-01

Or if you have GNU sed, you can use a string as well:

$ sed 's/\x0/^@/g' file
0|A0140017511|1|DEMÁS TEMAS|^@|^@|2014-08-01

edited Apr 25 '19 at 17:32

answered Apr 25 '19 at 16:56

oguz ismail

1
16
47
69

how replace null characters in UNIX?

1 Answers1