NOTE: CentOS Enterprise Linux is built from the Red Hat Enterprise Linux source code. Other than logo and name changes CentOS Enterprise Linux is compatible with the equivalent Red Hat version. This document applies equally to both Red Hat and CentOS Enterprise Linux.
Red Hat Enterprise Linux 4: System
Administration Guide
Copying and pasting text is easy using your mouse and the X
Window System. To copy text, click and drag your mouse over the
text to highlight it. To paste the text somewhere, click the middle
mouse button in the spot where the text should be placed.