【紧急求救】ssh后怎么取远处服务器的变量值

space6212

[root@db backup]# more testssh.sh
#!/bin/sh
BACKUPPATH=/home/102_db_backup
/usr/bin/ssh -t web <<EOF
   cd $BACKUPPATH
   pwd
   hostname
   #COPYNUM=`/bin/ls |wc -l`
   COPYNUM=2
   echo COPYNUM= "$COPYNUM"
   if [ "$COPYNUM" -ge "3" ]
   then
   #/usr/bin/find  $BACKUPPATH -mtime +2 -exec rm {} \;
   echo "rm $BACKUPPATH file"
   fi
   EOF
[root@db backup]# ./testssh.sh
Pseudo-terminal will not be allocated because stdin is not a terminal.
/home/102_db_backup
web
COPYNUM=
-bash: line 7: [: : integer expression expected
-bash: line 12: EOF: command not found

用<<EOF EOF 这个方式取到的$COPYNUM是空值
但在本地服务器不用EOF的方式是可以取道值的

怎么解决？
谢谢