编写脚本以使用预定义的密码创建多个用户 [英] Write script to create multiple users with pre-defined passwords

问题描述

所以我想制作一个脚本，从运行的users.txt创建用户

So I would like to make a script that create users from users.txt running

useradd -m -s /bin/false users_in_the_users.txt

并两次输入passwords.txt中的密码(以确认密码)

and fill the password from passwords.txt twice (to confirm the passwords)

这是脚本

#!/bin/bash

# Assign file descriptors to users and passwords files
exec 3< users.txt
exec 4< passwords.txt
exec 5< passwords.txt

# Read user and password
while read iuser <&3 && read ipasswd <&4 ; do
  # Just print this for debugging
  printf "\tCreating user: %s with password: %s\n" $iuser $ipasswd
  # Create the user with adduser (you can add whichever option you like)
  useradd -m -s /bin/false $iuser
  # Assign the password to the user, passwd must read it from stdin
  passwd $iuser
done

问题是，它没有填写密码.还有一件事，我希望脚本两次填充密码.

The problem is, it does not fill the passwords. And 1 more thing, I want the script to fill the passwords twice.

有什么建议吗?

推荐答案

您必须在stdin上提供密码.替换:

You have to supply the password on stdin. Replace:

passwd $iuser

具有:

passwd "$iuser" <<<"$ipasswd
$ipasswd"

或者，如mklement0建议的那样:

or, as suggested by mklement0:

passwd "$iuser" <<<"$ipasswd"$'\n'"$ipasswd"

咒语<<< 创建一个 here-string .在<<< 之前的命令中，标准提供了<<< 之后的字符串.在这种情况下，我们提供 passwd 命令想要的密码的两个副本.

The incantation <<< creates a here-string. The string that follows the <<< is provided as standard in to the command which precedes the <<<. In this case we provide the two copies of the password that the passwd command wants.

(脚本从纯文本文件中读取这些密码.我认为您的情况是某些特殊情况，这种情况没有通常的危险.)

(The script reads these passwords from a plain text file. I will assume that your situation is some special case for which this is not as dangerous as it normally would be.)

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