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Full Discussion: simple(?) if/else question
Top Forums UNIX for Dummies Questions & Answers simple(?) if/else question Post 302568585 by astropi on Thursday 27th of October 2011 05:05:13 PM
Old 10-27-2011
Yup, that was it. Obviously I'm just a beginner here! A couple of questions if you have the time.

1)What's the difference between bash and ksh and is one better than the other?

2)if [ "$(echo "if (${a} < ${b}) 1" | bc)" -eq 1 ]
could you explain the above line to me? Smilie

Thanks!!

edit: in my case, when I change from bash to ksh I don't get the same error in ksh.

Last edited by astropi; 10-27-2011 at 06:07 PM.. Reason: clarification
 

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shells(4)							   File Formats 							 shells(4)

NAME
shells - shell database SYNOPSIS
/etc/shells DESCRIPTION
The shells file contains a list of the shells on the system. Applications use this file to determine whether a shell is valid. See getuser- shell(3C). For each shell a single line should be present, consisting of the shell's path, relative to root. A hash mark (#) indicates the beginning of a comment; subsequent characters up to the end of the line are not interpreted by the routines which search the file. Blank lines are also ignored. The following default shells are used by utilities: /bin/bash, /bin/csh, /bin/jsh, /bin/ksh, /bin/pfcsh, /bin/pfksh, /bin/pfsh, /bin/sh, /bin/tcsh, /bin/zsh, /sbin/jsh, /sbin/sh, /usr/bin/bash, /usr/bin/csh, /usr/bin/jsh, /usr/bin/ksh, /usr/bin/pfcsh, /usr/bin/pfksh, /usr/bin/pfsh, and /usr/bin/sh, /usr/bin/tcsh, /usr/bin/zsh. Note that /etc/shells overrides the default list. Invalid shells in /etc/shells may cause unexpected behavior (such as being unable to log in by way of ftp(1)). FILES
/etc/shells lists shells on system SEE ALSO
vipw(1B), ftpd(1M), sendmail(1M), getusershell(3C), aliases(4) SunOS 5.10 4 Jun 2001 shells(4)
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