2. mkdir -p /tmp/monitor/
    4.  echo "* * * * * root bash /tmp/monitor/estab-monitor.sh >/dev/null 2>&1 " >> /etc/crontab
    6. # cat <<EOF>>/tmp/monitor/estab-monitor.sh
    7. #!/bin/bash
    8. #DTAE1=\`date +%Y%m%d%H\`
    9. #/bin/netstat -antplu | grep 'ESTAB' >>/tmp/monitor/monitor-estab\${DATE1}.log
    10. #EOF
    13.  cat <<EOF>>/tmp/monitor/estab-monitor.sh
    14. #!/bin/bash
    15. ##by author:albert-dong 
    16. ##albert-dong mailto: zdexter101@gmail.com
    17. ## www.skydong.com
    18. Date1=\`date +%Y%m%d%H\`
    19. Date2=\`date +%Y%m%d%H%M%S\`
    20. /bin/netstat -antplu | grep 'ESTAB' >> /tmp/monitor/monitor-estab_\${Date1}.log
    21. echo "#\${Date2}" >> /tmp/monitor/monitor-estab_\${Date1}.log
    22. echo "###################"  >> /tmp/monitor/monitor-estab_\$Date1.log
    23. echo " " >> /tmp/monitor/monitor-estab_\$Date1.log
    25. EOF