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Full Discussion: Not able to create alias in bash Sun solaris
Top Forums Shell Programming and Scripting Not able to create alias in bash Sun solaris Post 302671173 by guruprasadpr on Friday 13th of July 2012 07:55:10 AM
Old 07-13-2012
Hi

1) When you have a script which contains commands like aliases or setting environment variables, we usually want them to get reflected in the current shell. In these cases, we use source. This is why always the profile files and aliases are run using the . or source.

2) If you put the shebang(#!/bin/bash) in the script, you are telling the OS to run the script using the shell mentioned in the first line (which in this case is bash). The moment this happens, your aliases are not going to work since this is not run in the same shell. Moreover, alias syntax is not the same across all shells. In case of your vendor script, it is just like any other shell script, not some shell specific settings, which is why the shebang line is present.

Hope this helps.

Guru
 

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LEARN ABOUT OPENSOLARIS

shells

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/ksh93, /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/ksh93, /usr/bin/pfcsh,
       /usr/bin/pfksh, /usr/bin/pfsh, and /usr/bin/sh, /usr/bin/tcsh, /usr/bin/zsh, and /usr/sfw/bin/zsh. /etc/shells overrides the default list.

       Invalid shells in /etc/shells could cause unexpected behavior, such as being unable to log in by way of ftp(1).

FILES

       /etc/shells    list of shells on system

SEE ALSO

       vipw(1B), ftpd(1M), sendmail(1M), getusershell(3C), aliases(4)

SunOS 5.11							    20 Nov 2007 							 shells(4)
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