how to delete all the contents of a directory in linux code example

Example 1: remove all files inside directory linux

# remove everything in a directory 
rm /path/to/dir/*
# remove all sub-directories and files
rm -r /path/to/dir/*

Example 2: ubuntu delete directory and all files

rm -rf ./test

Example 3: linux remove folder and all his content

rm -f /path/to/directory/{*,.*}