<P> In computing, echo is a command in DOS, OS / 2, Microsoft Windows, Unix and Unix - like operating systems that outputs the strings it is being passed as arguments . It is a command typically used in shell scripts and batch files to output status text to the screen or a file, or as a source part of a pipeline . </P> <P> Many shells, including all Bourne - like (such as Bash or zsh,) and Csh - like shells implement echo as a builtin command . </P>

Why do we use echo command in unix