UNIX for Dummies Questions & Answers

if [ "`wc -l <file> | awk '{ print $1 }'`" -ne 1 ]; then
   echo "longer...." | mail -s "subject" user@domain.com
fi

#!/usr/bin/ksh

exec <$1

read ln
read ln
if [ "$ln" != "" ]
then
 echo "longer...." | mail -s "subject" user@domain.com
fi

$ ruby -ne 'BEGIN{c=0};c+=1 if $_ !~ /^[[:space:]]+$/; (`echo "long" | mail -s "long" root`;exit) if c==2 ' file

awk 'END{print (NR>1)?"wrong":X}' infile

#!/usr/bin/ksh

sed '
  1d
  s/.*/Longer/
  q
 ' file_in | read zans

if [ "$zans" = "Longer" ]
then
 echo "File grew." | mailx -s "File grew" whoever@wherever.com
fi

awk 'NR-1{print "File grew."; exit}' infile | mailx -s "File grew" whoever@wherever.com