Shell Programming and Scripting

if [ `ps -eaf | awk ' $NF ~ /^a$/' | wc -l` -eq 0 ]
then
      echo "Job: a not running" | mailx -s "Job: a not running" user@domain.com
else
      :
fi

 
for process  in a b c d
do
 count=`ps -eaf |grep -v grep| grep -i '$process' | wc -l`
 if [ $count -eq  0 ]
 then
 mailx -s "$process is not running"  abc@domain.com
 fi
done

awk ' $NF ~ /^a$/'

awk ' $NF ~ /^a$/'

for ...; do
    pgrep ... || mailx ...
done