Echo is a fundamental and most widely used command in Linux, which shows a line of text and provides a command line.
Echo can be implemented by various command shells like ksh, bash and csh, and is normally used in batch files and scripts. Sometimes, it can be used as an individual command. It plays a vital role in the creation of a shell script. The echo command displays a blank line on the screen with the command prompt on the next line, whenever this command is used without strings. The basic syntax for echo command is “echo [option(s)] [string(s)]”.