replace line with sed command code example
Example 1: ubuntu command line replace word in files
sed -i 's/original/new/g' file.txt
Example 2: sed replace in file
sed -i 's/foo/bar/g' hello.txt
Example 3: sed replace with variable
Use double quotes to make the shell expand variables while preserving whitespace:
sed -i "s/$var1/ZZ/g" "$file"