Realtime log line rate analyser
logtop [OPTIONS]
logtop is a System Administrator tool analyzing line rate on stdin. It reads on stdin and print a constantly updated result displaying, in columns: Line number, count, frequency, and the actual line.
$ tail -f FILE | logtop
is the friendly version of:
$ watch 'tail FILE | sort | uniq -c | sort -gr'
-s, --size=K
Only keep K lines in memory, instead of 10000.
-q, --quiet
Do not display a live view of the data, only display a top at exit.
-l, --line-by-line=K
Print result line by line, in a machine friendly format, K is the number of result to print per line.
Line by line format is : [%d %f %s\t]*\n
%d : Number of occurences
%f : Frequency of apparition
%s : String (Control chars replaced by dots.
-i, --interval=K
Interval between graphical updates, in seconds. Defaults to 1.
-h, --help
Show summary of options.
-v, --version
Show version of program.
Here are some logtop usage examples.
tail -f cache.log | grep -o "HIT\|MISS" | logtop
Realtime hit / miss ratio on some caching software log file.
tail -f access.log | cut -d' ' -f1 | logtop -s 10000
Realtime most querying IPs on your server, as long as log lines in access.log starts with the client IP.
tail -f access.log | cut -d' ' -f7 | logtop -s 10000
Realtime most requested web pages in a NCSA like log file.
cat auth.log | grep -v "CRON" | grep -o ": .*" | logtop -q -s 100000
Display a one-shot simple analyse of your auth.log.
logtop was written by Julien Palard.
This manual page was written by Julien Palard <[email protected]>, for the Debian project (and may be used by others).