sed
Edit text in a scriptable manner. More information: https://ss64.com/osx/sed.html.
- Replace the first occurrence of a string in a file, and print the result:
sed 's/{{find}}/{{replace}}/' {{filename}}
- Replace all occurrences of an extended regular expression in a file:
sed -E 's/{{regular_expression}}/{{replace}}/g' {{filename}}
- Replace all occurrences of a string [i]n a file, overwriting the file (i.e. in-place):
sed -i '' 's/{{find}}/{{replace}}/g' {{filename}}
- Replace only on lines matching the line pattern:
sed '/{{line_pattern}}/s/{{find}}/{{replace}}/' {{filename}}
- Print only text between n-th line till the next empty line:
sed -n '{{line_number}},/^$/p' {{filename}}
- Apply multiple find-replace expressions to a file:
sed -e 's/{{find}}/{{replace}}/' -e 's/{{find}}/{{replace}}/' {{filename}}
- Replace separator
/
by any other character not used in the find or replace patterns, e.g.#
:sed 's#{{find}}#{{replace}}#' {{filename}}
- [d]elete the line at the specific line number [i]n a file, overwriting the file:
sed -i '' '{{line_number}}d' {{filename}}
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