In Oracle Solaris 11, Korn Shell 93 (/usr/bin/ksh/ or usr/bin/ksh93) replaces both the Bourne Shell (/usr/bin/sh or /sbin/sh) and Korn Shell 88 (/usr/bin/ksh).
There are some incompatibilities between the shells. They are described in:
/usr/share/doc/ksh/COMPATIBILITY
If a script has compatibility problems you can use the legacy shell by changing the she-bang line:
If this doesn't work
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Use This
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#!/bin/ksh
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#!/usr/sunos/bin/ksh
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#!/usr/bin/ksh
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#!/usr/sunos/bin/ksh
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#!/bin/sh
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#!/usr/sunos/bin/sh
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#!/usr/bin/sh
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#!/usr/sunos/bin/sh
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#!/sbin/sh
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#!/usr/sunos/bin/sh
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