linux 脚本一个bug

Question

#!/bin/bash
pids=`lsof -i:9090|awk '{if(NR!=1&&$10=="(CLOSE_WAIT)")print $2}'`
listen=`lsof -i:9090|awk '{if(NR!=1&&$10=="(LISTEN)")print $2}'`
echo $pids
if [$pids];then
   for pid in $pids
   do
      echo "kill process $pid"
      kill -9 pid
   done

else
    /bin/java -cp "/root/BOOT-INF/classes:/root/BOOT-INF/lib/*" com.spider.unidbgserver.UnidbgServerApplication
    echo "start process"
fi

这个脚本运行总是报找不到这个$pids 这是为啥呢？如何处理这个bug

5: unidbg_new.sh: [18298]: not found

Answer 1

注意空格

if [ $pids ];then