mirror of https://github.com/CrimsonTome/tldr.git
37 lines
1.1 KiB
Markdown
37 lines
1.1 KiB
Markdown
# sed
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> Edit text in a scriptable manner.
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> More information: <https://www.gnu.org/software/sed/manual/sed.html>.
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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/{{regular_expression}}/{{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/{{regular_expression}}/{{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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