从php代码运行的shell脚本使用/ sbin / nologin如何将其设置为/ bin / bash

I am running a shell script by which we are scheduling a task using at command. But it schedules the at task but its not running the same beacuse its using shell /sbin/nologin when we are calling it from php code. It works fine if we run it from terminal. I am running a shell script by which we are sch