echo is a command used on *nix systems using the following syntax:

echo (-n) (string)

It prints whatever the string is to standard output making is a useful command to add lines to files or to give a user a message in the middle of a script.
It is usually found in /bin/echo and also exists as a command built into the C shell and Bourne shell. /bin/echo is the same as the Bourne shell version with one exception: the -n option to /bin/echo works only when the user's PATH variable lists /usr/ucb before /usr/bin. The C-shell version does not support escape characters.


echo "does my printer work?" | lp
echo "TITLE\nTITLE" > file ; cat txtA txtB >> file
echo "Warning: ringing bell \07"