shIO Redirection


Introduction

Generally a command takes inputs from terminal and outputs back to terminal. Normally a command reads input from keyboard and outputs result to the screen. Here is the importance of Input/Output Redirection

Syntax

  • [fd]<file
  • [fd]<&fd
  • [fd]<&-
  • [fd]>file
  • [fd]>&fd
  • [fd]>&-
  • [fd]>|file
  • [fd]>>file
  • [fd]<>file
  • [fd]<<[-] word
    ...
    word

Remarks