[root@diana log]# cat messages | grep "Mar 18 19" | grep "134.122.123.72" | wc
   5980  167440 1659043
[root@diana log]# cat messages | grep "Mar 18 20" | grep "134.122.123.72" | wc
  14450  404600 4008712
[root@diana log]# cat messages | grep "Mar 18 21" | grep "134.122.123.72" | wc
  14459  404852 4010890
[root@diana log]# cat messages | grep "Mar 18 22" | grep "134.122.123.72" | wc
  14566  407848 4040261
[root@diana log]# cat messages | grep "Mar 18 23" | grep "134.122.123.72" | wc
  14499  405972 4022026
[root@diana log]# cat messages | grep "Mar 19 00" | grep "134.122.123.72" | wc
   1573   44044  436329