Command Reference Guide
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STANDARD Printed by: Nora Chuang [nchuang] STANDARD
/build/1111/BRICK/man1/!!!intro.1
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e
echo(1) echo(1)
NAME
echo - echo (print) arguments
SYNOPSIS
echo [arg ] ...
DESCRIPTION
echo writes its arguments separated by blanks and terminated by a new-line on the standard output. It
also understands C-like escape conventions; beware of conflicts with the shell’s use of \:
\a write an alert character
\b backspace
\c print line without appending a new-line
\f form-feed
\n new-line
\r carriage return
\t tab
\v vertical tab
\\ backslash
\n the 8-bit character whose ASCII code is the 1-, 2-, 3- or 4-digit octal number n, whose first
character must be a zero.
\0num write an 8-bit value that is the zero-, one-, two- or three-digit octal number num
echo is useful for producing diagnostics in command files and for sending known data into a pipe.
Notes
Berkeley echo differs from this implementation. The former does not implement the backslash escapes.
However, the semantics of the \c escape can be obtained by using the -n option. The echo command
implemented as a built-in function of
csh follows the Berkeley semantics (see csh(1)).
EXTERNAL INFLUENCES
Environment Variables
LC_CTYPE determines the interpretation of arg as single and/or multi-byte characters.
If
LC_CTYPE is not specified in the environment or is set to the empty string, the value of
LANG is used
as a default for each unspecified or empty variable. If
LANG is not specified or is set to the empty string, a
default of "C" (see lang(5)) is used instead of
LANG. If any internationalization variable contains an invalid
setting, echo behaves as if all internationalization variables are set to "C". See environ(5).
International Code Set Support
Single- and multi-byte character code sets are supported.
AUTHOR
echo was developed by OSF and HP.
SEE ALSO
sh(1).
BUGS
No characters are printed after the first \c. This is not normally a problem.
STANDARDS CONFORMANCE
echo: SVID2, SVID3, XPG2, XPG3, XPG4, POSIX.2
Section 1−−194 − 1 − HP-UX Release 11i: December 2000
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