Which is posix shell?

[Gamoji Raghavendra]

Hello folks,
I am always confused about this issue.
Which is the posix shell in HP-UX? Is it /usr/bin/sh or /sbin/sh?

Is there a command to know the type of shell I am using?

Please enlighten me!!!

bye,
Raghu.

[Animesh Chakraborty]

Hi Raghu,
As of the HP-UX 10.0 release, the OSF POSIX Shell replaces the Korn Shell and Bourne Shell. Thus, /usr/bin/sh will be the POSIX Shell, and /usr/bin/ksh will be linked to /usr/bin/sh. However, /usr/old/bin/sh will contain the Bourne Shell for those users who still need it.

Hopre you are enlighten now :)

[Animesh Chakraborty]

Hi,
For more information read the man pages.
http://docs.hp.com/cgi-bin/fsearch/framedisplay?top=/hpux/onlinedocs/B2355-90164/B2355-90164_top.html&con=/hpux/onlinedocs/B2355-90164/00/00/36-con.html&toc=/hpux/onlinedocs/B2355-90164/00/00/36-toc.html&searchterms=shell%7cposix&queryid=20020310-215807

[Gamoji Raghavendra]

Thank you very much guys...
really ur response DID enlighten me ;)

[Darrell Allen]

Hi Raghu,

The answer is BOTH!

/usr/bin/sh is the dynamically linked POSIX shell which should be generally used. That's what I use in my scripts though /sbin/sh will also work.

/sbin/sh is the statically linked POSIX shell that should be used by root. DO NOT CHANGE ROOT'S DEFAULT SHELL! When you boot into single user or maintenance mode, the dynamic libraries are not available by default. Root needs to use /sbin/sh to avoid that problem. Changing root's shell can cause you to have to boot into a recovery shell to access the system for maintenance.

Darrell