rm source_file ...

The rm command is not reversible. The shell doesn't provide a Trash from where the deleted files and directories can be restored.
The option -i can be used to request confirmation before deleting a file or a directory.

• Remove a file (see below the option -i to request confirmation before deleting the file):
  

  $ rm file1
  

• Remove all files (excluding subdirectories and files starting with a period (.)) in the folder:
  

  $ rm folder1/*
  

  It may complain that there are subdirectories in folder1: "rm: folder1/folder11: is a directory".
  
  
• Remove all files starting with a period (.) in a folder (excluding sub-directories).
  

  $ rm folder1/.*
  

  It may show this warning: "rm: "." and ".." may not be removed".
  
  
• Remove the directory and all its contents:
  

  $ rm -r folder1
  

The following options can be used:

-r, -R, --recursive
    Remove directories and their contents recursively.

-f, --force
    Ignore nonexistent files and arguments, never prompt.

-i
    Prompt before every removal.

-I
    Prompt once before removing more than three files, or when removing recursively.

-v, --verbose
    Explain what is being done.

--preserve-root
    Do not remove '/' (default).

--no-preserve-root
    Do not treat '/' specially.

-d, --dir
    Remove empty directories.