mirror of https://github.com/CrimsonTome/tldr.git
28 lines
834 B
Markdown
28 lines
834 B
Markdown
# sed
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> Run replacements based on regular expressions.
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- Replace the first occurrence of a string in a file, and print the result:
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`sed 's/{{find}}/{{replace}}/' {{filename}}`
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- Replace all occurrences of an extended regular expression in a file:
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`sed -E 's/{{regex}}/{{replace}}/g' {{filename}}`
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- Replace all occurrences of a string in a file, overwriting the file (i.e. in-place):
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`sed -i '' 's/{{find}}/{{replace}}/g' {{filename}}`
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- Replace only on lines matching the line pattern:
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`sed '/{{line_pattern}}/s/{{find}}/{{replace}}/' {{filename}}`
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- Apply multiple find-replace expressions to a file:
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`sed -e 's/{{find}}/{{replace}}/' -e 's/{{find}}/{{replace}}/' {{filename}}`
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- Replace separator / by any other character not used in the find or replace patterns, e.g., #:
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`sed 's#{{find}}#{{replace}}#' {{filename}}`
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