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Does sed work with double quotes?
Escaping a double quote can absolutely be necessary in sed: for instance, if you are using double quotes in the entire sed expression (as you need to do when you want to use a shell variable). Aside: sed expressions containing BASH variables need to be double ( ” )-quoted for the variable to be interpreted correctly.
How do you use double quotes in sed?
Here’s a couple of examples where using double quotes makes perfectly sense: $ echo “We’re good!” | sed “s/’re/ are/” We are good! $ name=”John”; echo “Hello, I’m .” | sed “s//$name/” Hello, I’m John. This is actually related to bash, rather than just the sed command.
How do you add a backslash in sed?
You need a command, like c , to make this work. That is, sed -i -r “cHello \\ World \\” mytext. txt (better written sed -i -r ‘cHello \ World \’ mytext. txt ) does work.
How do you escape a backslash in sed?
Use single quotes for sed and you can get away with two backslashes. echo “sample_input\whatever” | sed ‘s/\\/\//’ Hopefully someone will come up with the correct explanation for this behavior.
How do you use sed S?
Find and replace text within a file using sed command
- Use Stream EDitor (sed) as follows:
- sed -i ‘s/old-text/new-text/g’ input.
- The s is the substitute command of sed for find and replace.
- It tells sed to find all occurrences of ‘old-text’ and replace with ‘new-text’ in a file named input.
What is the sed command used for?
SED command in UNIX is stands for stream editor and it can perform lot’s of function on file like, searching, find and replace, insertion or deletion. Though most common use of SED command in UNIX is for substitution or for find and replace.
How to insert strings containing slashes with SED?
So if you use sed to return some HTML templates (on a server), use double backslash instead of single:
Is there a way to escape single quotes in SED?
Hope that helps someone else! Just use double quotes on the outside of the sed command. It works with files too. If you have single and double quotes inside the string, that’s ok too. Just escape the double quotes. For example, this file contains a string with both single and double quotes.
When do you use escaped backslash in SED?
You’d want to use the escaped backslash in cases where you don’t know what characters might occur in the replacement strings (if they are shell variables, for example). The s command can use any character as a delimiter; whatever character comes after the s is used.
Can you use a backslash at the end of a string?
If you want to have a backslash at the end of the string and use the method above you’ll come across a problem: Raw strings don’t work properly when you do that. You have to use a regular string and escape your backslashes: However, if you’re working with Windows file names, you’re in for some pain.