hostcheck.sh

#!/usr/local/bin/bash
TCHECK=`date "+%Y-%m-%d %H:%M:%S"`
HOSTS="192.168.1.1 192.168.1.251 google.com 192.168.1.7"
xping=/usr/local/sbin/fping
flog=/var/log/hostcheck.log
FPATH=/var/tmp
for myHost in ${HOSTS}
do
    filenya=${FPATH}/${myHost}.txt
    if ${xping} -q -t250 ${myHost} ; then
        ## host alive, cek & remove file host.txt
        if [ -f ${filenya} ]; then
            echo "${TCHECK} : ${myHost} is BACK UP" >> ${flog}
            echo -e "Subject: $myHost is back up\r\n\n Aww , Snap.. $myHost is back up" |msmtp --from=default -t dest.addr@gmail.com
            rm -f ${filenya}
        fi
    else
        ## host down, cek & create file host.txt
        if [ ! -f ${filenya} ]; then
            ## not exist, baru down
            echo "${TCHECK} : ${myHost} is DOWN" >> ${flog}
            echo -e "Subject: $myHost is down\r\n\n Aww , Snap.. $myHost is down" |msmtp --from=default -t dest.addr@gmail.com
            touch ${filenya}
        else
            ## exist, masih down, nge-log doank gk usah email
            echo "${TCHECK} : ${myHost} is still DOWN" >> ${flog}
        fi
    fi
done

# ---------------EOF()---------------