how to remove everything in a directory linux code example

Example 1: delete directory linux

rm -rf dir1

Example 2: 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 3: remove directory from linux

rm -r filename

rm -rf filename

this command remove the directory and subdirectory forecefully

Example 4: ubuntu delete contents of folder

To remove all non-hidden files and sub-directories (along with all of their contents) in a 
directory use:
rm -r /path/to/directory/*