Shell Programming and Scripting

Sep  1 00:05:05 server9 pop3d-ssl: LOGIN, user=abc@example.com, ip=[xxx], port=[63030]
Sep  1 00:05:05 server9 pop3d-ssl: LOGOUT, user=abc@example.com, ip=[xxx], port=[63030], top=0, retr=0, rcvd=12, sent=46, time=0
Sep  1 00:05:05 server9 imapd-ssl: couriertls: connect: Connection reset by peer
Sep  1 00:05:06 server9 pop3d: LOGIN, user=def@example.com, ip=[xxx], port=[35312]
Sep  1 00:05:06 server9 pop3d-ssl: LOGOUT, user=ghi@example.com, ip=[xxx], port=[45887], top=0, retr=0, rcvd=18, sent=238125, time=2
Sep  1 00:05:06 server9 pop3d-ssl: LOGOUT, user=jkl@example.com, ip=[xxx], port=[20521], top=0, retr=0, rcvd=12, sent=39, time=151
Sep  1 00:05:06 server9 pop3d: LOGOUT, user=def@example.com, ip=[xxx], port=[35312], top=0, retr=0, rcvd=24, sent=424, time=0
Sep  1 00:05:07 server9 pop3d-ssl: LOGIN, user=mno@example.com, ip=[xx], port=[50097]
Sep  1 00:05:07 server9 pop3d-ssl: LOGOUT, user=mno@example.com, ip=[xxx], port=[50097], top=0, retr=0, rcvd=29, sent=102, time=0

$ sed -n "s/.*user=\([^,]*\),.*/\1/p" file.log | sort -u | wc -l
5

 awk '{match($0,/LOGIN, user=.*com/);A[substr($0,RSTART+12,RLENGTH-12)]} END{for(i in A){if(i){print i}}}'  Input_file

mno@example.com
def@example.com
abc@example.com

 awk '{match($0,/LOGIN, user=.*com/);if(substr($0,RSTART+12,RLENGTH-12)){o++}} END{print o}' Input_file

sed -n "s/.*user=\([^,]*\),.*/\1/p" file.log | sort -u | wc -l

sed -n "s/.*user=\([^,]*\),.*/\1/p" file.log file1.log file2.log file3.log file4.log file5.log file6.log | sort -u | wc -l

sed -n "s/.*user=\([^,]*\),.*/\1/p" file.log file[1-6].log| sort -u | wc -l

#!/bin/bash
DIR=/usr/src/count_test
FILES=$DIR/*
for i in $FILES
    do
    sed -n "s/.*user=\([^,]*\),.*/\1/p" $FILES | sort -u $i
done

DIR=/usr/src/count_test
FILES=$DIR/*
sed -n "s/.*user=\([^,]*\),.*/\1/p" $FILES | sort -u