sh.1 (2010 09)

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sh(1) sh(1)
NAME
sh - overview of various system shells
SYNOPSIS
POSIX Shell
sh [±aefhikmnoprstuvx
][±o option] ... [
-c string ][arg ... ]
rsh [±aefhikmnoprstuvx
][±o option] ... [
-c string ][arg ... ]
Korn Shell
ksh [±aefhikmnoprstuvx
][± o option ] ... [
-c string ][arg ... ]
rksh [±aefhikmnoprstuvx
][±o option ] ... [
-c string ][arg ... ]
C Shell
csh [-cefinstvxTVX
][command_file ][argument_list ... ]
Key Shell
keysh
DESCRIPTION
Remarks
The POSIX .2 standard requires that, on a POSIX-compliant system, executing the command
sh
activates the POSIX shell (located in file /usr/bin/sh on HP-UX systems), and executing the com-
mand man sh produces an on-line manual entry that displays the syntax of the POSIX shell command-
line.
However, the
sh command has historically been associated with the conventional Bourne shell, which
could confuse some users. To meet standards requirements and also clarify the relationships of the vari-
ous 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.
NOTE: The Bourne shell (/usr/old/bin/sh
) is removed from the system starting with HP-UX 11i
Version 1.5. Please use the POSIX shell (
/usr/bin/sh)asanalternative.
Shell Descriptions
The HP-UX operating system supports the following shells:
sh POSIX-conforming command programming language and command interpreter residing
in file /usr/bin/sh. Can execute commands read from a terminal 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.
ksh Korn-shell command programming language and commands interpreter residing in file
/usr/bin/ksh. Can execute commands read from a terminal or a file. This shell, like
the POSIX shell, contains a history mechanism, supports job control, and provides vari-
ous other useful features.
csh A command language interpreter that incorporates a command history buffer, C-
language-like syntax, and job control facilities.
rsh 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.
rksh restricted version of the Korn-shell command interpreter Sets up a login name and execu-
tion environment whose capabilities are more controlled (restricted) than normal user
shells.
keysh An extension of the standard Korn Shell that uses hierarchical softkey menus and
context-sensitive help.
HP-UX 11i Version 3: September 2010 − 1 − Hewlett-Packard Company 1