sed command with -i option failing on Mac, but works on Linux

sed command with -i option failing on Mac, but works on Linux

If you use the -i option you need to provide an extension for your backups.

If you have:

File1.txt
File2.cfg

The command:

sed -i '.original' 's/old_link/new_link/g' *

create 2 backup files like:

File1.txt.original
File2.cfg.original

You can use

sed -i '' 's/old_link/new_link/g' *

to ignore backups.