[-f:未找到命令，Bash脚本是否存在[duplicate]

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这个问题已经有了答案:

Why should there be a space after '[' and before ']' in Bash? 4 answers
为什么在Bash中“['和before ']”后面要有空格?4答案

I'm having an issue with a script that I am trying to program. Narrowed down and simplified code and it gives an error that command is not found. If i do "test -f file" in command line it returns nothing, not command not found

我对我正在编写的脚本有意见。缩小和简化的代码，并给出一个错误的命令没有找到。如果我在命令行中执行“测试-f文件”，它不会返回任何内容，而不会返回未找到的命令

        PATH=$1

        #!/bin/bash
        DIR=$1

                    if [[-f $PATH]]; then
                        echo expression evaluated as true
                    else
                        echo expression evaluated as false
        fi
        exit

Here is the actual more complicated script I'm trying to run

下面是我要运行的更复杂的脚本

       verify()
       {
       if [[-f $1]]; then
         VFY[$2]="f"
         echo "$1 is a file"
       elif [[-d $1]]
       then
         VFY[$2]="d"
         echo "$1 is a directory"
       else 
         VFY[$2]=0
         echo -e "\r"
         echo "$1 is neither a file or a directory"
         echo -e "\r"
       fi
       }

Its part of a larger script that can move things around depending on inputs. I've run this in CentOS 6, and FreeBSD, both give the same error "[[-f: Command not found"

它是一个更大的脚本的一部分，可以根据输入来移动东西。我在CentOS 6和FreeBSD中运行过这个，它们都给出相同的错误"[-f: Command not found"

1 个解决方案

#1

Simply add an extra space between [[ and -f, and also before ]].

只需在[[和-f，以及之前]之间添加额外的空格即可。

You will get:

你将得到:

#! /bin/bash
DIR=${1-}            # unused in your example

if [[ -f test.sh ]]; then
    echo "expression evaluated as true"
else
    echo "expression evaluated as false"
fi
exit

and for your function

和你的函数

verify() # file ind
{
    local file=$1 ind=$2

    if [[ -f "$file" ]]; then
        VFY[ind]="f"                     # no need of $ for ind
        echo "$file is a file"
    elif [[ -d "$file" ]]; then
        VFY[ind]="d"
        echo "$file is a directory"
    else 
        VFY[ind]=0
        echo -e "\n$file is neither a file or a directory\n"
    fi
}

#1