echo - echo arguments to standard output
/usr/ucb/echo [-n] [argument]
echo writes its arguments, separated by BLANKs and ter-
minated by a NEWLINE, to the standard output.
echo is useful for producing diagnostics in command files
and for sending known data into a pipe, and for displaying
the contents of environment variables.
For example, you can use echo to determine how many sub-
directories below the root directory (/) is your current
directory, as follows:
o echo your current-working-directory's full pathname
o pipe the output through tr to translate the path's
embedded slash-characters into space-characters
o pipe that output through wc -w for a count of the
names in your path.
example% /usr/bin/echo "echo $PWD | tr '/' ' ' | wc -w"
See tr(1) and wc(1) for their functionality.
The shells csh(1), ksh(1), and sh(1), each have an echo
built-in command, which, by default, will have precedence,
and will be invoked if the user calls echo without a full
pathname. /usr/ucb/echo and csh's echo() have an -n option,
but do not understand back-slashed escape characters. sh's
echo(), ksh's echo(), and /usr/bin/echo, on the other hand,
understand the black-slashed escape characters, and ksh's
echo() also understands \a as the audible bell character;
however, these commands do not have an -n option.
-n Do not add the NEWLINE to the output.
See attributes(5) for descriptions of the following attri-
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
| Availability | SUNWscpu |
csh(1), echo(1), ksh(1), sh(1), tr(1), wc(1), attributes(5)
The -n option is a transition aid for BSD applications, and
may not be supported in future releases.
Man(1) output converted with