replace a substring using shell script

Question

I have a string like: b"a

and I want to replace it with string: ]b"a

The quotation mark here is very annoying, maybe some one can help me here?

Answer 1

echo 'b"a' | sed 's|b"a|]&|'  ## & represents the matched string; 

Outputs:

]b"a

• Use g to replace all matches in a line: sed 's|b"a|]&|g'

Similarly in Bash if you have it stored in a variable:

A='b"a'
B=${S/b\"a/]b\"a}   ## B=${S//b\"a/[b\"a} to replace all occurrences 
echo "$B"

Outputs:

]b"a