Replace using sed

Linux replace string in all files

sed -i 's/old-text/new-text/g' input.txt

Sed replace in file

sed -i 's/foo/bar/g' hello.txt

Source: cyberciti.biz

Replace using sed

#on my mac
sed -i -e 's/old-text/new-text/g' text.txt

Bash find and replace all files with specifc name with another file

find . -name "boom.txt" -exec cp ~/replace.txt {} \;

Source: stackoverflow.com

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

Source: tutorialspoint.com

Sed replace with variable

sed -i "s/$var1/ZZ/g" "$file"

Source: askubuntu.com

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