How do i replace [] brackets using SED

Question

I have a string that i am want to remove punctuation from.

I started with

sed \'s/[[:punct:]]/ /g\'

But i had problems on HP-UX n

Answer 1

You can do it manually:

sed 's/[][\/$*.^|@#{}~&()_:;%+"='\'',`>

This remove the 32 punctuation character, the order of some characters is important:

• - should be at the end like this -]
• [] should be like that [][other characters]
• ' should be escaped like that '\''
• not begin with ^ like in [^
• not begin with [. [= [: and end with .] =] :]
• not end with $]

here you can have explication of why all that http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap09.html#tag_09_03_03