echo [options] [
Send (echo) the input string to standard output. This is the /bin/echo command. echo also exists as a command built into the C shell and bash. The following character sequences have special meanings:
Suppress trailing newline.
The octal character whose ASCII code is nnn.
Enable character sequences with special meaning. (In some versions, this option is not required in order to make the sequences work.)
Disable character sequences with special meaning.
Suppress printing of newline after text.
Print help message and then exit.
Print version information and then exit.
/bin/echo "testing printer" | lp
/bin/echo "TITLE\nTITLE" > file ; cat doc1 doc2 >> file
/bin/echo "Warning: ringing bell \a"