linux shell脚本为什么不能执行if命令

NAME_LIST="web"

for NAME in $NAME_LIST
do
PID_NUM_SUM=`ps aux | grep $NAME | wc -l`
SYS_LOAD=`uptime | awk '{print $(NF-2)}'|sed 's/,//'`
LOAD_VULE=`awk 'BEGIN{print('"$SYS_LOAD"'>='"$SYS_LOAD_MAX"'?"1":"0")}'`
if [$LOAD_VULE=1] ;then
echo $(date +"%y-%m-%d %H:%M:%S") "killall $NAME" "(LOAD:$SYS_LOAD)" >> /tmp/autoreboot.log
kill -9 `ps -ef|grep 'platformdb.cfg' | awk '{print $2}'`
echo $(date +"%y-%m-%d %H:%M:%S") "start $NAME" "(LOAD:$SYS_LOAD)" >> /tmp/autoreboot.log
else
echo "$NAME very health!(LOAD:$SYS_LOAD)" > /dev/null
fi
done

执行为什么会报如下错误：
sh autoreboot.sh
autoreboot.sh: line 9: [0]: command not found
报错内容应该是：
autoreboot.sh: line 9: [0=1]: command not found

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