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Top Forums Shell Programming and Scripting get last 5 minutes' log from log file? Post 302080574 by reborg on Wednesday 19th of July 2006 04:42:35 PM
Old 07-19-2006
Well you could use egrep and multiple patterns to only search once.

assign each of the last 5 minutes to a variable and do

egrep "var1|var2|var3|var4|var5" syslog > newlog

or just take the last line of the previous extracted log.

Code:
var=$(tail -1 last_log_file)
sed -ne "/$var/"',$p' syslog > newlog

 

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filterlog(8)						      System Manager's Manual						      filterlog(8)

NAME
filterlog - Logs and reports system Correctable Read Data (CRD) memory errors on specific systems. SYNOPSIS
/usr/sbin/filterlog [-l] [-d crdlog] [-d crdlifetime] [-s crdlength #] [-s crdcount #] [-h] OPTIONS
Logs or filters an entry from stdin. This option is used by the binary event-log daemon, binlogd. Dumps the contents of the CRD log file in text format. Errors shown in the file are those recorded by the system since the last boot. Dumps the CRD lifetime log information in text format. Used to set the CRD interval time in minutes. The default is 24 hours. Used to set the CRD interval count. The default is 50. Prints a list of the command option options defined in this reference page. DESCRIPTION
This utility ensures that only genuine memory errors are reported to system log files on certain system types. The command filterlog is called directly by the binary event-log daemon, binlogd to filter system CRD (memory hardware) errors. CRD errors are logged according to user-definable parameters. If it is determined that a genuine memory problem exists, an entry is passed to binlogd. The error will then be written to the system's error log file and can be notified to the user through DECevent. The filterlog utility uses two variables to determine if a CRD error signifies a genuine memory hardware problem -- crdlength and crdcount. If crdcount number of errors occur during crdlength minutes, an entry is passed to binlogd. The default settings are 50 errors in 24 hours (1440 minutes). The filterlog utility reads the /etc/binlog.conf file to determine what log file should be used to record any events. The default log file is /usr/adm/binary.crdlog. SEE ALSO
Commands: binlogd(8), dia(8) (DECevent) filterlog(8)
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