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Whats wrong with this if-else

 
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Old 12-12-2011
Both syntaxes are available in most unix Bourne-type shells.

The [[ ]] syntax is a "Conditional Expression" and is described in that section in the manual for your Shell. This uses && for "and" and || for "or". Many shells won't do more than one "and" or "or" condition in any one expression.

The [ ] syntax is a "Test" and is partially described in the manual for your Shell and explained further in "man test". There you will find -a for "and" and -o for "or".

Personally in your script I'd use "case" !

Code:
CHECK=M10;
case "${CHECK}" in
"M9"|"M10"|"M11"|"M12")
        echo "hello hi"
        ;;
*)
        echo "how are u hello hi"
        ;;
esac

Last edited by methyl; 12-12-2011 at 12:20 PM.. Reason: added example
 
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transition-check

TRANSITION-CHECK(1)                                                                                                            TRANSITION-CHECK(1)

NAME

       transition-check - check a package list for involvement in transitions

SYNOPSIS

       transition-check --help|--version

       transition-check [-f|--filename=FILENAME] [source package list]

DESCRIPTION

       transition-check checks whether any of the listed source packages are involved in a transition for which uploads to unstable are currently
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       If neither a filename nor a list of packages is supplied, transition-check will use the source package name from debian/control.

OPTIONS

       -f, --filename=filename
           Read a source package name from filename, which should be a Debian package control file or .changes file, and add that package to the
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EXIT STATUS

       The exit status indicates whether any of the packages examined were found to be involved in a transition.

       0   Either --help or --version was used, or none of the packages examined was involved in a transition.

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LICENSE

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AUTHOR

       Adam D. Barratt <adam@adam-barratt.org.uk>

Debian Utilities                                                    2013-12-23                                                 TRANSITION-CHECK(1)