Escape single quote

Question

The following is working as expected. I want to replace the word "me" with \'

 echo "test ' this" | sed 's/'"'"'/me/g' test me this 

Expected result:

test \' this 

Is it possible to escape double quotes as well in the same command?

Answer 1

Your question is a little confusing since there's no me in the original string to replace. However, I think I have it. Let me paraphrase:

I have a sed command which can successfully replace a single quote ' with the word me. I want a similar one which can replace it with the character sequence \'.

If that's the case (you just want to escape single quotes), you can use:

pax$ echo "test ' this" | sed "s/'/\\\'/g" test \' this 

By using double quotes around the sed command, you remove the need to worry about embedded single quotes. You do have to then worry about escaping since the shell will absorb one level of escapes so that sed will see:

s/'/\'/g 

which will convert ' into \' as desired.

If you want a way to escape both single and double quotes with a single sed, it's probably easiest to provide multiple commands to sed so you can use the alternate quotes:

pax$ echo "Single '" 'and double "' Single ' and double "  pax$ echo "Single '" 'and double "' | sed -e "s/'/\\\'/g" -e 's/"/\\"/g' Single \' and double \" 

If I've misunderstood your requirements, a few examples might help.

Answer 2

I have some doubts about your question, but anyway maybe my solution is useful for anyone.

Let's me say before all :

\\ that's mean one \ because when you put two together you are cancelling its meaning as metacharacter. And \x27 as single quote, at least for me is easier than working with single a double ...

Finally I put

echo "test me this" | sed 's/me/\\\x27/g' 

so here you have test me ==> test \' this

   echo "test \' this" | sed 's/\\\x27/me/g' 

and here is the opposite.