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Full Discussion: grep for last 15 min of log
Top Forums Shell Programming and Scripting grep for last 15 min of log Post 302399818 by treesloth on Monday 1st of March 2010 05:05:26 PM
Old 03-01-2010
This is one of those times I really wish everyone would just use epoch time, or something like it, in the logs. Then it's pretty simple.

Anyway, does it have to be in grep? Using the following as an example:

Code:
Mar  1 21:16:48 servername sshd(pam_unix)[1561]: authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=123.456.789.100

this should work, with adjustments as time passes. Obviously, it's pretty one-off... Considerable work would be needed before it would work in a script.

Code:
awk '{ month = strftime( "%b" , systime() ) ; day = strftime("%d",systime()) ; gsub("^0","",day) ; split($3,time,":" ) } ; $1 == month && $2 == day && ( time[1] == "21" || time[1] == "21" ) && ( time[2] <= 16 && time[2] > 1 ) && $0 ~ "error 102" {print}' /var/log/messages

I'm sure that there are some awk wizards here that could make no end of improvements... I'm not one, given the time constraints I have today.
 

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LEARN ABOUT DEBIAN

nnstats

NNSTATS(1m)															       NNSTATS(1m)

NAME

       nnstats - display nnmaster collection and expire statistics

SYNOPSIS

       nnstats [ -lt ] [ -d month day ] [ -m month ] [ logfile ]...

DESCRIPTION

       nnstats	will  extract  the collection (C) and expiration (X) entries from the log file and calculate total and average number of articles,
       groups and elapsed time per day, per month, or for the duration of the whole log file.

       Normally only a summary for the specified period is printed.  If -l is specified, the statistics  for  each  day  in  the  period  is  also
       printed, and if -t is specified the summary is not printed.

       Normally the statistics is collected for all days in the log files (or the current log file if one is not specified).

       If  "-m	month" is specified, the statistics for that month is calculated.  The month is specified in normal date notation, i.e. a capital-
       ized three letter abbreviation like Jan, Feb, ...

       If "-d month day" is specified, the statistics for that date only is calculated and printed.

FILES

       ../Log	The log file

SEE ALSO

       nn(1), nnusage(1M), nnadmin(1M), nnmaster(8)

NOTES

       If nnmaster is run with options -LCX, nnstats will not work, because the necessary entries are not written to the log file.

AUTHORS

       Mark Moraes <moraes@csri.toronto.edu>
       Kim F. Storm <storm@texas.dk>

4th Berkeley Distribution					    Release 6.6 						       NNSTATS(1m)
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