lines_per_day.rb

(1) lines_per_day.rb

#!/usr/bin/ruby

# Needed to figure out the daily load on our reporting server.  Decided to hit the monthly log file
# and see how many lines per day were being written to it.  This was a good excuse to test out some
# new Ruby learning.

logfile = ARGV[0]
101.upto(131) do |day|
    day = day.to_s[1..2]
    print "April #{day}:\t"
    system("grep 201104#{day} #{logfile} | wc -l")
end

(2) sample bash session

dpritchett@LAP-DPRITCHETT ~/work
$ ./lines_per_day.rb ./Dtb_Freds_Planning_201104.log
April 01:       9886
April 02:       108
April 03:       83
April 04:       8293
April 05:       11893
April 06:       12408
April 07:       11832
April 08:       10948
April 09:       89
April 10:       148
April 11:       11320
April 12:       12858
April 13:       13582
April 14:       10867
April 15:       11040
April 16:       1100
April 17:       882
April 18:       12276
April 19:       11287
April 20:       12799
April 21:       1471
April 22:       0
April 23:       0
April 24:       0
April 25:       0
April 26:       0
April 27:       0
April 28:       0
April 29:       0
April 30:       0
April 31:       0

dpritchett@LAP-DPRITCHETT ~/work
$