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Full Discussion: trying to use logical or and i must be missing something
Top Forums Shell Programming and Scripting trying to use logical or and i must be missing something Post 302590813 by Corona688 on Tuesday 17th of January 2012 04:13:15 PM
Old 01-17-2012
That might actually have been a better way to do it.

The reason your first try didn't work because "or" wasn't really what you wanted. You flipped the logic with the !=, which changes the picture a bit -- a string can't possibly be equal 12 and 24 at the same time! One or the other, or both, will always be false, flipping that makes one or the other always true; and or-ing that produces a statement which is always true no matter what.

To do it with ||:

Code:
if [ "$CPUS" = "12" ] || [ "$CPUS" = "24" ]; then
:
else
        ...
fi

I think the -z is superfluous, then, since a null string will never equal 12 or 24.
Last edited by Corona688; 01-17-2012 at 05:20 PM..
This User Gave Thanks to Corona688 For This Post:
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LEARN ABOUT MOJAVE

vgreduce

VGREDUCE(8)                                                   System Manager's Manual                                                  VGREDUCE(8)

NAME

       vgreduce - reduce a volume group

SYNOPSIS

       vgreduce  [-a|--all] [-A|--autobackup y|n] [-d|--debug] [-h|-?|--help] [--removemissing] [-t|--test] [-v|--verbose] VolumeGroupName [Physi-
       calVolumePath...]

DESCRIPTION

       vgreduce allows you to remove one or more unused physical volumes from a volume group.

OPTIONS

       See lvm for common options.

       -a, --all
              Removes all empty physical volumes if none are given on command line.

       --removemissing
              Removes all missing physical volumes from the volume group, if there are no logical volumes allocated on those. This resumes  normal
              operation of the volume group (new logical volumes may again be created, changed and so on).

              If this is not possible (there are logical volumes referencing the missing physical volumes) and you cannot or do not want to remove
              them manually, you can run this option with --force to have vgreduce remove any partial LVs.

              Any logical volumes and dependent snapshots that were partly on the missing disks get removed completely. This includes those  parts
              that lie on disks that are still present.

              If your logical volumes spanned several disks including the ones that are lost, you might want to try to salvage data first by acti-
              vating your logical volumes with --partial as described in lvm (8).

SEE ALSO

       lvm(8), vgextend(8)

Sistina Software UK                                      LVM TOOLS 2.02.95(2) (2012-03-06)                                             VGREDUCE(8)
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