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Created March 14, 2024 08:02
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Useful sed commands
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sed examples.md

Duplicate a line and modify it

sed '/pattern/{p;s/pattern/replacement/}' input_file

Explanation:

  • /pattern/: This specifies the pattern that identifies the line you want to duplicate and modify.
  • {p;s/pattern/replacement/}: This is a group of commands enclosed within {}.
    • p is used to print the line as it is, and
    • s/pattern/replacement/ is used to substitute the pattern with the replacement string.

Delete everything after a matching line

sed '/pattern/,$d' input_file

Explanation:

  • /pattern/,$: This specifies a range from the line containing the pattern to the end of the file ($).
  • d: This command deletes the range specified.
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