mirror of https://github.com/CrimsonTome/tldr.git
36 lines
1014 B
Markdown
36 lines
1014 B
Markdown
# sed
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> Edit text in a scriptable manner.
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- Replace the first occurrence of a regular expression in each line of a file, and print the result:
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`sed 's/{{regex}}/{{replace}}/' {{filename}}`
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- Replace all occurrences of an extended regular expression in a file, and print the result:
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`sed -r '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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- Delete lines matching the line pattern:
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`sed '/{{line_pattern}}/d' {{filename}}`
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- Print the first 11 lines of a file:
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`sed 11q {{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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