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tldr/pages/linux/sed.md
Patrick R 45909948c8
sed: improve description of -i option (#9935) 
* sed: improve description of -i option

The original description makes it sound like sed would wait for additional input while it actually just modifies the specified file in-place.

* Stylistic improvement to sed.md

Minor stylistic improvements to the in place flag.

Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>

---------

Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>
2023-03-13 00:59:51 +08:00

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sed

Edit text in a scriptable manner. See also: awk, ed. More information: https://www.gnu.org/software/sed/manual/sed.html.

  • Replace all apple (basic regex) occurrences with mango (basic regex) in all input lines and print the result to stdout:

{{command}} | sed 's/apple/mango/g'

  • Execute a specific script [f]ile and print the result to stdout:

{{command}} | sed -f {{path/to/script.sed}}

  • Replace all apple (extended regex) occurrences with APPLE (extended regex) in all input lines and print the result to stdout:

{{command}} | sed -E 's/(apple)/\U\1/g'

  • Print just a first line to stdout:

{{command}} | sed -n '1p'

  • Replace all apple (basic regex) occurrences with mango (basic regex) in a specific file and overwrite the original file in place:

sed -i 's/apple/mango/g' {{path/to/file}}