Using imbedded commands inside expr(1)

[Paul Gerwitz]

I seem to be having trouble using expr.  The following dies:

    test=`expr `tail +3 file` + 1` 

    Basically get a numeric value from a file and increment it, putting the
    result in a shell variable.

    I have tried all kinds of convolutions of quoting etc.
    Temporarily we have broken it up into several seperate statements.

    Any clues ??

    Running HP-UX at 7.0 using ksh.


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