echo
—
write arguments to the standard output
The echo
utility writes any specified operands,
separated by single blank (`` '') characters and followed by a newline
(``\n'') character, to the standard output.
The following option is available:
-n
- Do not print the trailing newline character.
Note that many shells (e.g.,
csh(1) and
ksh(1)) provide a built-in
echo
command which tends to differ from this utility
in the treatment of options and backslashes.
The echo
utility exits 0 on success,
and >0 if an error occurs.
The echo
utility is expected to be IEEE
Std 1003.2 (“POSIX.2”) compatible.
An echo
utility appeared in
Version 2 AT&T UNIX.