LinuxQuestions.org - [SOLVED] basic sed question

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vincix

06-06-2015 03:55 AM

basic sed question

I was reading this tutorial on SED (http://www.grymoire.com/Unix/Sed.html#uh-0) where it says that sed is line-oriented and that if you run sed 's/one/ONE/' <file, the change would only occur ONCE on a line.

The thing is, when I tested it, it changed every single occurrence on the whole line.

Why is that?

vincix

06-06-2015 03:58 AM

Ah, ok, I think I know the answer. It might be related to the fact that that's a UNIX tutorial, not a Linux tutorial, and that's the default behaviour for sed in UNIX.

linosaurusroot

06-06-2015 04:21 AM

Code:

df | sed 's/s/S/;q' 

FileSystem                1K-blocks      Used Available Use% Mounted on



df | sed 's/s/S/g;q' 

FileSyStem                1K-blockS      USed Available USe% Mounted on

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