linux_sed.md

• SED – stream editor
  • Globally Replace - g
  • Replace only on lines matching THE line pattern
  • Find and Delete - d
  • Multiple Commands -e
  • Specify Delimiter

SED – stream editor

sed allows you to filter & transform text, it's kind of a search/replace function.

syntax:

sed -i 's/find/replace/' filename

• -i stands for 'inplace'

Globally Replace - g

sed -i 's/find/replace/g' filename

• last g specifies that this substitution is global.

Replace only on lines matching THE line pattern

sed '/LINE_PATTERN/s/find/replace/' filename

Find and Delete - d

sed '/LINE_PATTERN/d' filename

Multiple Commands -e

sed -e 's/find/replace/' -e 's/find2/replace2/' filename

Specify Delimiter

The character follows 's' stands for the delimiter, you can change if your text contain this delimiter.

sed 's|find|replace|' filename