linux find and replace code example
Example 1: linux replace string in all files
sed -i 's/old-text/new-text/g' input.txt
Example 2: sed replace in file
sed -i 's/foo/bar/g' hello.txt
Example 3: Linux command line search and replace string
> grep -rl "old string" . | xargs sed -i 's/old string/new string/g'
Example 4: bash search and replace text in file
# Basic syntax using awk:
awk '{gsub(regex, substitution_text, $field#); print $0;}' input_file
# Where:
# - gsub is a function that replaces every regular expression (regex)
# match with substitution_text.
# - $field# is optional but can be used to specify a particular field
# where gsub should operate. (This is useful if you want to
# restrict the substitutions to a specific column)
# Example usage:
awk '{gsub(" ","",$0); print $0;}' input_file
# This replaces every space " " with nothing "", thereby eliminating all
# whitespace from the file