Replace a string in all files - Unix

Question

I am trying to replace a string ::: with :: for all lines in a batch of txtfiles (it can be considered as a word since there\'s always a space in front

Answer 1

find . -name "./td/*.c" -exec sed -i "s/:::/::/g" '{}' \;

No need for od/ at all.

EDIT:

A slightly simpler variation:

ls td/*.c | xargs sed -i '' "s/:::/::/g"