Hello people i`m back i`m from argentina , i`m trying to do a script that list the sulog of the last month (actual month 07 i need 06), the complicated part is that i need that but in here

-set +A MESES 0 Dec Jan Feb Mar Apr May Jun Jul Ago Sep Oct Nov
Mes=${MESES[`date +%m`]}

last -a|nawk -v mes="$Mes" '
$4 ~ mes {print $0;flag=1}
/system boot/ && $5 ~ mes {print $0;flag=1}
$4!~ mes && (/system boot/ && $5 !~ mes) {if(flag==1) exit;}
'
this program print the user that log on the computer (last) of the last month, my boss said something about convert the motnh of a number but i am very lost any ideas? thank for your help if someone come to argentina i invite the dinner.

What should be the expected output?

Yes the out put must be the last of the last mointh and the su of the last month. Thank you franklin

Post a sample of your output.
How can we know what your boss expect if you don't?

This is the last of the last month
root pts/2 Wed Jun 20 17:25 - 17:25 (00:00)
root pts/3 Wed Jun 20 16:28 - 17:00 (00:31)
root ftp Wed Jun 20 15:59 - 16:11 (00:12)
root pts/3 Wed Jun 20 15:54 - 16:10 (00:16)
root pts/2 Wed Jun 20 15:44 - 16:31 (00:47)
root pts/2 Wed Jun 20 15:33 - 15:37 (00:04)
root console Tue Jun 19 14:48 - 14:49 (00:01)
And this is the only su of the last month
SU 06/24 16:13 + console root-root

this is want i need

Take it easy with me if you don`t wanna help me , i erase my thread.