Linux 意外标记“then'；

我创建了一个脚本，帮助管理员从文本文件中添加和删除用户，而不是手动执行。我遇到了这个错误，我很难解决它

[ec2-user@ip-172-31-15-55 ~]$ ./account-manager user add
./account-manager: line 21: syntax error near unexpected token `then'
./account-manager: line 21: `   then'

如何修复此错误

#!/bin/bash

file=$1
action=$2

if [ -z "$file" ]
then
        echo " Please enter a file with your users"
        exit 0
fi

if [ -z "$action" ]
then
        echo " Please define an account to remove or deleete"
        exit 0
fi

for user in `cat $file`
do
        if[ "$action" == "add" ]
        then
                echo adding user: $user
                useradd $user -m -p password
        fi
        if[ "$action" == "remove" ]
        then
                echo removing user: $user
                userdel -r $user
        fi

done

---

注意你的

if

语句周围的空格，使用一个工具来理解你可能犯错误的地方。

你应该在第20行和第25行的

if

和

[

之间加一个空格。你的代码应该是这样的

#!/bin/bash

file=$1
action=$2

if [ -z "$file" ]
then
        echo " Please enter a file with your users"
        exit 0
fi

if [ -z "$action" ]
then
        echo " Please define an account to remove or deleete"
        exit 0
fi

for user in `cat $file`
do
        if [ "$action" == "add" ]
        then
                echo adding user: $user
                useradd $user -m -p password
        fi
        if [ "$action" == "remove" ]
        then
                echo removing user: $user
                userdel -r $user
        fi

done

---

如果[

与

不一样，如果[

（注意空格）谢谢你的帮助，把答案贴出来，我会接受你的one@MatSee了解在

bash

中迭代文件内容的正确方法。