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Top Forums Shell Programming and Scripting Delete all log files older than 10 day and whose first string of the first line is "MSH" or "<?xml" Post 302991886 by RudiC on Friday 17th of February 2017 12:44:27 PM
Old 02-17-2017
Just guessing that you are not running a (recent) bash for your "substring expansion" ${firstLine:0:3} as it is the usual syntax and should work. ${cut -c1-8} should be a "command substitution" in the syntax $(cut -c1-8) but needs an input file to work upon.
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SCANLOGS(8)						      System Manager's Manual						       SCANLOGS(8)

NAME
scanlogs - summarize INN log files. SYNOPSIS
scanlogs [ norotate ] [ nonn ] DESCRIPTION
Scanlogs summarizes the information recorded in the INN log files (see newslog(5)). By default, it also rotates and cleans out the logs. It is normally invoked by the news.daily(8) script. KEYWORDS
The following keywords are accepted: norotate Using this keyword disables the rotating and cleaning aspect of the log processing: the logs files are only scanned for information and no contents are altered. nonn Normally the nn log file is scanned and rotated. Using this keyword disables this function. If scanlogs is invoked more than once a day, the ``norotate'' keyword should be used to prevent premature log cleaning. HISTORY
Written by Landon Curt Noll <chongo@toad.com> and Rich $alz <rsalz@uunet.uu.net> for InterNetNews. This is revision 1.1, dated 1996/10/29. SEE ALSO
innd(8) newslog(5), news.daily(8), nnrpd(8). SCANLOGS(8)
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