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d=`date +%Y-%m-%d_%H-%M-%S`

recipients="something@gmail.com"

subject="Alert"

from="something@something.com"

message_txt="Nothing Found is catched at $d"

 

 

declare file="alert.txt"

declare regex="\s+ Cannot \s+"

declare regex2="\s+ Nothing Found \s+"

 

declare file_content=$( cat "${file}" )

 

 

wget -O - url/alert.php | grep "Cannot\|Nothing found" > alert.txt

 

 

if [[ " $file_content " =~ $regex2 ]] # please note the space before and after the file content

    then

       /usr/sbin/sendmail "$recipients" << EOF

       subject:$subject

       from:$from

       $message_txt

 

EOF

    fi

exit