Tips to using bash script

Append text at the beginning of files, example:

1. The css or scss file imported from 3rd party, will put all the class at the root level, even if the import code is inside a class scope. That cause lots of issue, the simplest workaround is to append the class scope at all CSS file begin and end.

• Append a class at the beginning:

find . -name "*.css" | xargs -I {} sed -i '1s/^/.myclass{\n/' {}

• Append a text at the end of the end of the file

find . -name "*.css" -print0 | xargs -0 -I{} sh -c 'echo "\n}" >> "{}"'

• Check the network port

netstat -tulpn