Gnu sed删除单引号

Question

The problem is that sed removes single quotes besides they are not mentioned in the matching pattern:

echo "aaa 'w' ddd" | sed -r 's/aaa/echo dd/ge'

results in

dd w ddd

Do you have any explanation on this?

Answer 1

The "e" at the end is causing it. Essentially, you are asking sed to do this:

echo dd 'w' ddd

which will produce the results you see. You could do something like this:

echo $(echo "aaa 'w' ddd" | sed -e 's/aaa/dd/g')