kali文件执行的权限不够解决办法

root@kali:~# ./sql.py
bash: ./sql.py: 权限不够
root@kali:~# ./002.py
Fuzzing PASS with 1 bytes
^CTraceback (most recent call last):
  File "./002.py", line 13, in <module>
    connect = s.connect(('172.18.5.117',110))
  File "/usr/lib/python2.7/socket.py", line 228, in meth
    return getattr(self._sock,name)(*args)
KeyboardInterrupt
root@kali:~# ./sql.py
bash: ./sql.py: 权限不够
root@kali:~# chmod   a+x ./sql.py