A dumb script

 It just does the job and forgive me for not having time to make it better (e.g ..at least putting the pswd in a variable!!!.) ..nah ...Im just too lazy to do it:

###Need sshpass installed , for passing over the password text

#!/bin/sh

SERVERLIST=serverlist.input
RCMD1='uptime'
RCMD2='cat /etc/passwd | grep hacker' 
while read SERVERNAME
 do
    echo "----------------------">>Remote_Exec_report.txt
    echo $SERVERNAME>>Remote_Exec_report.txt
    sshpass -p 'YourPassword'    ssh -o StrictHostKeyChecking=no -n root@$SERVERNAME $RCMD1 >>Remote_Exec_report.txt
    echo "------checking hacker user, no output expected-------">>Remote_Exec_report.txt
    sshpass -p 'YourPassword'    ssh -o StrictHostKeyChecking=no -n root@$SERVERNAME $RCMD2 >>Remote_Exec_report.txt
    echo "------Done checking-------">>Remote_Exec_report.txt
done < "$SERVERLIST"