sh man page on HP-UX

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sh(1)									 sh(1)

NAME
       sh - overview of various system shells

SYNOPSIS
   POSIX Shell
       option] ...  string] [arg ...]

       option] ...  string] [arg ...]

   Korn Shell
       option] ...  string] [arg ...]

       option] ...  string] [arg ...]

   C Shell
       [command_file] [argument_list ...]

   Key Shell
DESCRIPTION
   Remarks
       The  POSIX .2 standard requires that, on a POSIX-compliant system, exe‐
       cuting the command activates the POSIX shell (located in file on	 HP-UX
       systems),  and  executing  the command produces an on-line manual entry
       that displays the syntax of the POSIX shell command-line.

       However, the command has historically been associated with the  conven‐
       tional Bourne shell, which could confuse some users.  To meet standards
       requirements and also clarify the relationships of the  various	shells
       and  where  they reside on the system, this entry provides command-line
       syntax and a brief description of each shell, and lists	the  names  of
       the manual entries where each shell is described in greater detail.

       The  Bourne  shell  is  removed from the system starting with HP-UX 11i
       Version 1.5.  Please use the POSIX shell as an alternative.

   Shell Descriptions
       The HP-UX operating system supports the following shells:

	      POSIX-conforming command programming language and command inter‐
	      preter
			residing in file Can execute commands read from a ter‐
			minal or a file.  This shell conforms to current POSIX
			standards  in  effect  at  the	time  the HP-UX system
			release was introduced, and is	similar	 to  the  Korn
			shell  in  many respects.  Similar in many respects to
			the Korn shell, the POSIX  shell  contains  a  history
			mechanism,  supports job control, and provides various
			other useful features.

	      Korn-shell command programming language and commands interpreter
			residing in file Can execute commands read from a ter‐
			minal  or  a  file.  This shell, like the POSIX shell,
			contains a history mechanism,  supports	 job  control,
			and provides various other useful features.

	      A command language interpreter
			that  incorporates  a  command	history buffer, C-lan‐
			guage-like syntax, and job control facilities.

	      Restricted version of the POSIX shell command interpreter.
			Sets up a login name and execution  environment	 whose
			capabilities  are  more	 controlled  (restricted) than
			normal user shells.

	      restricted version of the Korn-shell command interpreter
			Sets up a login name and execution  environment	 whose
			capabilities  are  more	 controlled  (restricted) than
			normal user shells.

	      An extension of the standard Korn Shell
			that uses hierarchical softkey menus and  context-sen‐
			sitive help.

			┌──────────────┬────────────────────┐
			│ To obtain:   │  Use the command:  │
			├──────────────┼────────────────────┤
			│ POSIX Shell  │  /usr/bin/sh ...   │
			│ Korn Shell   │  /usr/bin/ksh ...  │
			│ C Shell      │  /usr/bin/csh ...  │
			│ Key Shell    │  /usr/bin/keysh    │
			└──────────────┴────────────────────┘
       These shells can also be the default invocation, depending on the entry
       in the file.  See also chsh(1).

WARNINGS
       Many manual entries contain descriptions of shell behavior or  describe
       program	or application behavior similar to ``the shell'' with a refer‐
       ence to ``see sh(1)''.

SEE ALSO
       For more information on the various individual shells, see:

       keysh(1)	      Key Shell description.

       ksh(1)	      Korn Shell description.

       sh-posix(1)    POSIX Shell description.

       csh(1)	      C Shell description.

									 sh(1)
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