How do you copy file in UNIX system?

You can copy content of a file into another file by using 'cp' command.
Syntax- cp [options] <old file name> <new file name>
Common option
     -i     prompt and wait for confirmation before proceeding
     -r    recursively copy a file
Ex- % cp <old file name>  <new file name>
 Now you have two copies of the file. They are completely independent of each other.
They each have their own inode, data blocks, and directory table entries.