sed command to replace a string in a file code example

Example 1: ubuntu command line replace word in files

sed -i 's/original/new/g' file.txt

Example 2: linux replace string in all files

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

Example 3: sed replace in file

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

Example 4: replace using sed

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