Shell Programming and Scripting

./test.sh: syntax error at line 5: `space=$' unexpected

#!/bin/sh
df -h |grep -v '/oradata2'|grep -v '/orabkp' |grep -v '/oradata5' | awk '{ print $5 " " $6 " " $4 }' | while read output;
#df -h |grep -v '/oradata2'|awk '{ print $5 " " $6 " " $4 }' | while read output;
do
th=80
space=$(echo $output | awk '{ print $1}' | cut -d'%' -f1 )
echo $space >> space.log
echo $capacity >> capa.log
partition=$(echo $output | awk '{ print $2 }' )
available=$(echo $output | awk '{ print $3 }' )
if [[ $space -gt $th ]] ;
then
echo " \" $partition partition has crossed over $space% of its capacity, available space is $available" >> log.log

fi
done

df -h |grep -v '/oradata2'|grep -v '/orabkp' |grep -v '/oradata5'

df -h |grep -v '/oradata2'|grep -v '/orabkp' |grep -v '/oradata5' | awk '{ print $5 " " $6 " " $4 }' > abcd

while read line;
#df -h |grep -v '/oradata2'|awk '{ print $5 " " $6 " " $4 }' | while read output;
do
th=80
space=$(echo $line | awk '{ print $1}' | cut -d'%' -f1 )
echo $space >> space.log
echo $capacity >> capa.log
partition=$(echo $line | awk '{ print $2 }' )
available=$(echo $line | awk '{ print $3 }' )
if [[ $space -gt $th ]] ;
then
echo " \" $partition partition has crossed over $space% of its capacity, available space is $available" >> log.log

fi
done < abcd

/dev/md/dsk/d1          20G   6.3G    13G    33%    /
/devices                 0K     0K     0K     0%    /devices
ctfs                     0K     0K     0K     0%    /system/contract
proc                     0K     0K     0K     0%    /proc
mnttab                   0K     0K     0K     0%    /etc/mnttab
swap                    85G   1.7M    85G     1%    /etc/svc/volatile
objfs                    0K     0K     0K     0%    /system/object
sharefs                  0K     0K     0K     0%    /etc/dfs/sharetab
/dev/dsk/c1t5d5s2      492G   389G    98G    80%    /oradata3
/dev/dsk/c1t5d6s2      492G   399G    88G    82%    /oradata4

df -h |grep -v '/oradata2'|grep -v '/orabkp' |grep -v '/oradata5' | awk '{ print $5 " " $6 " " $4 }'  | while read output; 
 do 
 th=80; 
 space=$(echo $output | awk '{ print $(NF-1) }' | cut -d'%' -f1 ); 
 partition=$(echo $output | awk '{ print $NF }'); 
 available=$(echo $output | awk '{ print $4 }' ); 
 if [[ $space -gt $th ]] ; 
 then 
 echo " \"$partition\" partition has crossed over $space% of its capacity, available space is $available"; 
 fi; 
 done