创建linux用户及设置密码

#!/bin/bash
## ==========================================================================
## Copyright (c) linl. All rights reserved.
##
## 检查mftp用户
##
## Initially written by linl 2012-03
##
## Modified by nobody


func_chattr_del_i()
{
    chattr -i /etc/passwd
    chattr -i /etc/group
    chattr -i /etc/gshadow
    chattr -i /etc/shadow
}

func_chattr_add_i()
{
    chattr +i /etc/shadow
    chattr +i /etc/passwd
    chattr +i /etc/group
    chattr +i /etc/gshadow
}

if
    id mftp
then
    dir_exsit=`find /home -type d -name "mftp"`
    if [ "$dir_exsit" == "" ] ;then
        echo "用户mftp已存在,但/home/mftp目录不存在. [warn]"
        echo "现在创建/home/mftp目录......"
        if
            mkdir /home/mftp
        then
            echo "创建/home/mftp目录成功. [ok]"
        else
            echo "创建/home/mftp目录失败. [error]"
            exit 1
        fi
    else
        echo "用户mftp和目录/home/mftp均已存在. [ok]"
    fi
else
    echo "用户mftp不存在,现在创建......"
    func_chattr_del_i
    if
        useradd -p ******** mftp
    then
        func_chattr_add_i
        echo "创建mftp用户成功. [ok]"
    else
        func_chattr_add_i
        echo "创建mftp用户失败. [error]"
        exit 1
    fi
fi

设置密码：
passwd    username