Tip: Find and Replace a string in multiple files at onces by avoiding LTS (Leaning toothpick syndrome)

Linux Command:

$ grep -lR "oldString" -r | xargs sed -i 's/oldString/newString/g'

How to avoid LST.

If your oldString or newString contains character "/" (the delimiter), then Delimiter collision occurs, which cause to LST.  To avoid that, select another delimiter such as # or ? in sed command.

examples:

sed -i 's#oldString#newString#g'
sed -i 's?oldString?newString?g'