You can copy and paste text from documents in Mac OS X into Terminal. You can copy text from within Terminal or from another application.
For example, perhaps you have a text document, HTML page, or PDF file open in Mac OS X with a UNIX statement or script you want to use. You can simply copy the text and paste it into Terminal, just as you would with any Mac OS X program.
Copy text in another application and then, in Terminal, choose Edit > Paste.
Drag selected text into Terminal from any Mac OS X application that supports it.
Drag text clippings from the Finder into Terminal.
If the text being pasted includes the Return character at the end of a line, the command is executed immediately.