[Gllug] Arithmetic error in bash on 08 and 09?

[Holger Duerer]

>>>>> "Liam" == Liam Delahunty <liamvictor at gmail.com> writes:
    Liam> going back to my original problem of removing 1 from the
    Liam> hour and then grepping the time in a log file I've come up
    Liam> with the following.

  [...]

If you have GNU's date (I don't think the others have, but please
correct me if I am wrong), you could of course also let date do the
calculation itself:

,----
| ph = $(date --date "1 hour ago" %H)
`----

   Holger
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