01-15-2013
Not sure I understand your request.
So - the end time will be in the last file (key word END), and the begin (keyword BEGIN) will be in the same file or in four predecessors. Why not loop up to five times through ls -t LOG_hostx* (watch out, no -r option!), grepping each file for "BEGIN"? If there's more than one BEGIN and you need the last one, try tacing the files.
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LEARN ABOUT FREEBSD
whatis
APROPOS(1) BSD General Commands Manual APROPOS(1)
NAME
apropos, whatis -- keyword search whatis documentation databases
SYNOPSIS
apropos [-d] keyword ...
whatis [-d] keyword ...
DESCRIPTION
The apropos utility searches a set of databases looking for documentation matching each keyword and displays the results. The whatis utility
does the same search but only on complete words.
-d Print extra debugging information.
The keyword is simply passed to grep(1) allowing for extended regular expression matches.
ENVIRONMENT
The following environment variables affect the execution of apropos:
MANLOCALES, MANPATH, PATH
Used to find the location of the whatis database files. See manpath(1) for additional information.
PAGER Program used to display files. If unset, more -s is used.
DIAGNOSTICS
The apropos utility exits 0 if a keyword matched and 1 if no keywords are matched or no whatis databases are found.
SEE ALSO
grep(1), makewhatis(1), man(1), manpath(1), man.conf(5)
BSD
September 1, 2010 BSD