deleting a file in ubuntu code example

Example 1: remove file from terminal ubuntu

//in admin folder must be terminal in as root
for root type
$ sudo su
//to remove file 
//as example

rm -f /usr/bin/node

Example 2: how to delete files in linux

rm  .. rm -r  .. r stands for recursive

Example 3: remove a file in ubuntu

=> To delete a single file:
unlink filename
rm filename

=> To delete multiple files at once
rm filename1 filename2 filename3
rm *.pdf

Example 4: rm directory linux

To remove an empty directory, use either rmdir or rm -d followed by the directory name: 
rm -d dirname rmdir dirname.
To remove non-empty directories and all the files within them, use the rm command with the -r (recursive) option: 
rm -r dirname.