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Full Discussion: Equivalence of "if then" statements in bash
Top Forums Shell Programming and Scripting Equivalence of "if then" statements in bash Post 302949010 by sea on Monday 6th of July 2015 03:08:27 AM
Old 07-06-2015
An 'else if' and an 'elif' are two different things.

Here are some basic if/else examples
Code:
if true
then	echo true
fi

true && echo true

if ! false
then	echo true
else	echo false
fi

! false && echo true || echo false
! false && \
	echo true || \
	echo false

if true
then	if false
	then	echo true-false
	else	echo true-true
	fi
fi

if true
then	if false
	then	echo true-false
	else	echo true-true
	fi
else	echo false
fi

if true
then	echo true
elif false
then	echo false
else	echo something else?
fi

 

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LEARN ABOUT CENTOS

bashbug-64

BASHBUG(1)						      General Commands Manual							BASHBUG(1)

NAME

       bashbug - report a bug in bash

SYNOPSIS

       bashbug [--version] [--help] [email-address]

DESCRIPTION

       bashbug	is  a shell script to help the user compose and mail bug reports concerning bash in a standard format.	bashbug invokes the editor
       specified by the environment variable EDITOR on a temporary copy of the bug report format outline. The user must fill  in  the  appropriate
       fields  and  exit  the  editor.	 bashbug  then	mails the completed report to bug-bash@gnu.org, or email-address.  If the report cannot be
       mailed, it is saved in the file dead.bashbug in the invoking user's home directory.

       The bug report format outline consists of several sections.  The first section provides information about the  machine,	operating  system,
       the  bash  version, and the compilation environment.  The second section should be filled in with a description of the bug.  The third sec-
       tion should be a description of how to reproduce the bug.  The optional fourth section is for a proposed fix.  Fixes are encouraged.

ENVIRONMENT

       bashbug will utilize the following environment variables if they exist:

       EDITOR Specifies the preferred editor. If EDITOR is not set, bashbug defaults to emacs.

       HOME   Directory in which the failed bug report is saved if the mail fails.

       TMPDIR Directory in which to create temporary files and directories.

SEE ALSO

       bash(1)

AUTHORS

       Brian Fox, Free Software Foundation
       bfox@gnu.org

       Chet Ramey, Case Western Reserve University
       chet@po.cwru.edu

GNU Bash-4.0							   1998 July 30 							BASHBUG(1)
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