clear file content in linux directory code example

Example 1: remove all cache ubuntu

$ sudo apt-get clean

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: ubuntu delete directory and all files

rm -rf ./test

Example 4: remove folder and contents linux

# Remove Single File Using rm:
rm file1.txt
# Remove Directory and it's contents:
rm -r dir1 			# '-r' is short for '-recursive' 
# Remove empty Directory:
rm -d dir1 			# '-d' is short for '-dir'