CLI One Liners – www.linux.com/archive/feature/141921

• For each hostname in file hosts.dns, print the hostname and return the NS record
  for line in `cat hosts.dns`; do echo $line; dig ns $line +short; done
• MySQL import:
  mysql -D databasename < database.sql
• Replace all occurrences in a directory, of foo, with bar
  find ./ -type f -exec sed -i 's/foo/bar/g' {} \;