echo Command
  
  
  Purpose
  
  Writes character strings to standard output.
  
   Syntax
  
  echo [  -n ] [ String ...  ]
  
  Description
  
  The echo command writes character strings to standard output.
  Strings are separated by spaces, and a new-line character follows
  the last String.  If no String is specified, a blank line (new-
  line character) is displayed.  Use the echo command to produce
  diagnostic  messages in command files and to  send  data  into  a
  pipe.
  
  The echo command recognizes the following escape conventions:
  
  \b	Displays a backspace character.
  
  \c	Suppresses the new-line character.
  
  \f	Displays a form-feed character.
  
  \n	Displays a new-line character.
  
  \r	Displays a carriage return character.
  
  \t	Displays a tab character.
  
  \v	Displays a vertical tab character.
  
  \\	Displays a backslash character.
  
  \ Number	Displays an 8-bit character whose ASCII value is the
  1-, 2-, or 3-digit octal number Number.  The first digit of
  Number must be a 0.
  
  Note:	The bsh, csh, and ksh commands each contain a built-in echo
  subcommand.  The echo command and the echo subcommand do not
  necessarily work the same  way.  For information on these subcom-
  mands, see the  bsh,  csh, and  ksh commands.
  
  Flags
  
  -n	No new-line character is added to the output.
  
  Exit Status
  
  This command returns the following exit values:
  
  0	Successful completion.
  
  >0	An error occurred.
  
  Examples
  
  1.	To write a message to standard output, enter:
  
  echo Please insert diskette . . .
  
  2.	To display a message containing special characters, enter:
  
  echo "\n\n\nI'm at lunch.\nI'll be back at 1:00."
  
  This skips three lines and displays the message:
  
  I'm at lunch.
  I'll be back at 1:00.
  
  Note:	You must put the message in quotation marks if it contains
  escape sequences such as \Number.  Otherwise, the shell inter-
  prets  the  \ (backslash) as a metacharacter and treats  the  \
  differently.
  
  3.	To use the echo command with pattern-matching characters,
  enter:
  
  echo The back-up files are: *.bak
  
  This usage displays the message The back-up files are: followed
  by the file names in the current directory ending with .bak.
  
  4.	To add a single line of text to a file, enter:
  
  echo Remember to set the shell search path to $PATH. >>notes
  
  This usage adds the message to the end of the file notes after
  the shell substitutes the value of the PATH shell variable.
  
  5.	To write a message to the standard error output, enter:
  
  echo Error: file already exists. >&2
  
  Use this command in shell procedures to write error messages.  If
  the >&2 is omitted, the message is written to the standard out-
  put.
  
  Implementation Specifics
  
  This command is part of Base Operating System (BOS) Runtime.
  
  Files
  
  /usr/bin/echo	Contains the echo command.
  
  Related Information
  
  The Command Input and Output Redirection section in  Commands,
  Processes, and Virtual Terminals Overview in AIX Version 3.2 Sys-
  tem User's Guide: Base and Devices describes how the operating
  system processes input and output and how to use the redirect and
  pipe symbols.
  
  The  bsh command,  csh command,  ksh command.