topic Re: Shell usage in Operating System - HP-UX

Shell usage

Ngoh Chean Siung — Tue, 06 Jul 2004 05:32:37 GMT

Hi,

Any difference of using korn, bourne & restricted korn shell? How to justify which shell to be used and under what condition?

For restricted korn shell, what are the things that user cannot do? What I know is can use the command "cd" and "chown". Anything else?

regards.

Re: Shell usage

Simon Hargrave — Tue, 06 Jul 2004 05:40:32 GMT

As a general rule, on HPUX, the POSIX shell is the shell of choice unless you have a specific reason to use another, for example scripts using ksh-specific peculiarities.

The restrictions of rsh, from the man page are to disallow: -

+ Changing directory (see the cd special command and cd(1))
+ Setting the value of SHELL, ENV, or PATH
+ Specifying path or command names containing /
+ Redirecting output (>, >|, <>, and >>)

Re: Shell usage

Muthukumar_5 — Tue, 06 Jul 2004 05:43:39 GMT

Hai,

Check the difference between the bourne ans ksh at,

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=611474

If the ksh with -r option is used then it is called restricted shell.

More restrictions are,
+ Changing directory (see cd(1))
+ Setting the value of SHELL, ENV, or PATH
+ Specifying path or command names containing /
+ Redirecting output (>, >|, <>, and >>)

Resricted editor red is available.

See the ksh man page for "rksh Only" part.

Regards,
Muthukumar.

Re: Shell usage

Bharat Katkar — Tue, 06 Jul 2004 06:12:30 GMT

Hi,
See the link below, it helps you choose the shell depending on it's capability:

http://docs.hp.com/cgi-bin/fsearch/framedisplay?top=/hpux/onlinedocs/B2355-90046/B2355-90046_top.html&con=/hpux/onlinedocs/B2355-90046/00/00/5-con.html&toc=/hpux/onlinedocs/B2355-90046/00/00/5-toc.html&searchterms=shells&queryid=20040706-051026

http://docs.hp.com/cgi-bin/fsearch/framedisplay?top=/hpux/onlinedocs/B2355-90046/B2355-90046_top.html&con=/hpux/onlinedocs/B2355-90046/00/00/37-con.html&toc=/hpux/onlinedocs/B2355-90046/00/00/37-toc.html&searchterms=shells&queryid=20040706-051026

Hope that helps.
Regards,

Re: Shell usage

Jose Mosquera — Tue, 06 Jul 2004 06:21:29 GMT

Hi,

Simple but useful:
#man sh

Rgds.

Re: Shell usage

R. Sri Ram Kishore_1 — Tue, 06 Jul 2004 08:18:27 GMT

Hi,

Check out this thread:
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=624818

Also, take a look at these links for a very detailed comparison of features of all the shells:
a) http://www.cee.odu.edu/uclhd/uclhd_unix_different_shell.php#shell_feature
b) http://bcebhagalpur.net/tutorials/shell/shell.htm
c) http://cbbrowne.com/info/unixshells.html

HTH.

Regards,
Sri Ram