While loop in a shell script gives error : [: too many arguments. How to resolve this issue?

Question

function read_num(){
            echo "Enter a lower limit"
            read lower_limit
            echo "Enter a upper limit"
            read upper_limit
            while [ [ $lower_limit -lt 1 ] || [ $lower_limit -gt $upper_limit ] ]
            do
            echo "Please enter again."
            read_num
            done 
        }
    
    read_num

当我输入两个数字下限和上限时，它会给出以下输出。

check.sh: line 6: [: too many arguments

第 6 行是 while 循环

while [ [ $lower_limit -lt 1 ] || [ $lower_limit -gt $upper_limit ] ]

Answer 1

给你，这对我有用：

#!/bin/bash

function read_num(){
    echo "Enter a lower limit"
    read lower_limit
    echo "Enter a upper limit"
    read uper_limit
    while [[ $lower_limit -lt 1 ]] || [[ $lower_limit -gt $upper_limit ]]
    do
    echo "Please enter again."
    read_num
    done
}

read_num

参考：Bash scripting, multiple conditions in while loop

While loop in a shell script gives error : [: too many arguments. How to resolve this issue?

While loop in a shell script gives error : [: too many arguments. How to resolve this issue?

unix

bash

shell

sh