我正在尝试一个简单的程序来比较存储在日志文件中的字符串值，并得到如下错误，

#!/bin/bash

check_val1="successful"
check_val2="completed"
log="/compile.log"

if [[ grep $check_val1 $log -ne $check_val1 || grep $check_val2 $log -ne $check_val2 ]];
then
        echo "No Error"
else
        echo "Error"
fi

Error:

./simple.sh: line 7: conditional binary operator expected
./simple.sh: line 7: syntax error near `$check_val1'
./simple.sh: line 7: `if [[ grep $check_val1 $log -ne $check_val1 || grep $check_val2 $log -ne $check_val2 ]];'