Linux bash从文件中读取然后将用户添加到linux

Question

我想添加 Linux 用户，然后我想尽可能严格地限制他们。 (noshell 等)来自名为 users 的文件。

这是我的代码，但不起作用:

    while read line
    do
input = echo ($input | tr ":" "\n")

        #!/bin/bash
        # Script to add a user to Linux system
        if [ $(id -u) -eq 0 ]; then
            if [ $? -eq 0 ]; then
                echo "$username exists!"
                exit 1
            else
                pass=$(perl -e 'print crypt($ARGV[0], "password")' $input[1)
                useradd -m -p $input[1] $input[0]
                [ $? -eq 0 ] && echo "User has been added to system!" || echo "Failed to add a user!"
            fi
        else
            echo "Only root may add a user to the system"
            exit 2
        fi
    done < /var/www/users

然后我想用 noshell 限制他们的帐户。 (但我知道该怎么做。但我无法正确地将输入与文件分开:/)

输入(用户):

john:lol
rambo:sanyi
cula:kari

非常感谢!

Answer 1

我认为，下面的脚本就可以了:

#!/bin/bash

USERS=`cat /etc/passwd | cut -d: -f1`

if [ `id -u` -ne 0 ]
then
    echo "Login as Root"
else
    while read line
    do
        USER=`echo $line | cut -d ":" -f1`
        PASS=`echo $line | cut -d ":" -f2`

        echo $USERS | grep "${USER}" > /dev/null

        if [ $? -eq 0 ]
        then
            echo "Username ${USER} Exists!"
        else
            password=`perl -e 'print crypt("${PASS}", "salt")', "\n"`
            useradd -p "${password}" ${USER}

            echo "User ${USER} created!"
        fi

        i+=1
    done < /var/www/users
fi