echo.1

unix v7是最后一个广泛发布的研究型UNIX版本

.TH ECHO 1 
.SH NAME
echo \- echo arguments 
.SH SYNOPSIS
.B echo
[
.B \-n
]
[ arg ] ...
.SH DESCRIPTION
.I Echo
writes its arguments separated by blanks and terminated by
a newline on the standard output.
If the flag
.B \-n
is used,
no newline is added to the output.
.PP
.I Echo
is useful for producing diagnostics in
shell programs and for writing constant data on pipes.
To send diagnostics to the standard error file, do
`echo ... 1>&2'.