This question already has answers here: How to ensure that string interpolated into `sed` substitution escapes all metachars (1 answer) Insert text from file inline after matching pattern in another file (3 answers) Closed 7 years ago. I want to write a sed (or awk) command to replace a string from one file with the … Read more
I have a situation where i want to replace a particular string in many files
As in example I’m trying to get line numbers which contains the pattern. My pattern contains slashes so I wanted to add custom delimiter.
Suppose I have a file that contains multiple occurrences of both StringA and StringB. I want to replace all occurrences of StringA with StringB, and (simultaneously) all occurrences of StringB with StringA.
I have a list of replacements like so:
So I’ve been using ‘sed’ on linux for a while, but have had a bit of difficulty trying to use it on OSX since ‘POSIX sed’ and ‘GNU sed’ have so many little differences. Currently I’m struggling with how to insert a line of text after a certain line number. (in this case, line 4)
The commands below may takes minutes depends on the file size. Is there any more effient method?
This ought to be really simple, but for some reason it is not working:
How can I do the following to a CSV file using sed or awk?