create_users.py

#!/usr/bin/env python

from passlib.hash import sha512_crypt

from subprocess import call
import csv
import sys


def load_users(csv_file):
    """ Load a CSV file and return a dictionary representing each user.

    Hash the password using SHA_512 and a random salt.
    """

    users = {}

    with open(csv_file, 'rb') as f:
        reader = csv.reader(f)
        for row in reader:
            username = "{0}{1}".format(row[0][0], row[1]).lower()
            password = row[2]

            salted_password = sha512_crypt.encrypt(password)

            users[username] = salted_password

    return users


def create_user(username, password):
    """ Create a user with subprocess.call. Returns the exit status. """

    command = ['/usr/sbin/useradd', username, '-p', password]
    return call(command)


def main():
    """ Load a CSV script and generate passwords. """

    # looking for one command line arguments
    if len(sys.argv) != 2:
        sys.exit("usage: {0} <file.csv>".format(sys.argv[0]))

    csv_file = sys.argv[1]

    print("loading users...")
    users = load_users(csv_file)

    for username, password in users.iteritems():
        print("creating user '{0}'".format(username))

        if create_user(username, password) != 0:
            sys.exit("ABORTING - DID NOT EXECUTE SUCCESSFULLY")

    print("complete!")

if __name__ == '__main__':
    main()

create_users.sh

#! /bin/bash

#script for batch generating users for AECC's raspberry pi. All passwords are temporary and will need to be prompted for new passwords on first login

echo -ne "This script must be run as root!\nScript for creating users for AECC raspberry pi from a csv file.\nEnter path for csv file: "
read csv_file

#exit if not root
if [[ `id -u` != 0  ]]; then
    echo "Must be root to run script"
    exit 1
fi


if [[ ! -f "$csv_file" ]]
then
    echo "ERROR! File $csv_file does not exist. Run again with a valid file path"

else
    #read csv file which contains first name, last name, student number
    while IFS=, read fn ln sn
    do
        #get first char of first csv field (first letter of first name)
        user1=${fn:0:1}
        #get first last name 
        user2=$(echo "$ln" | cut -f 1 -d ' ')
	if [[ "$user2" == "de" ]] 
	then
		#dirty method. awk would probs be better but I wanna finish this quickly
		sfln=$(echo "$ln" | cut -f 2 -d ' ')
		user2+="$sfln"
		echo "$user2"
        fi
	#combine lowercasefirst letter of last name and first last name) into username variable
        user=$(echo "$user1$user2" | awk '{print tolower($0)}')
        passwd=$sn
        #change password for created user. I don't like this method, but I was having problems passing a hashed password
	useradd -m $user && echo "$user:$passwd" | chpasswd
	#echo "$user:$passwd"
	if [ $? -eq 0 ] 
	then
		echo "Created User:$user"
		echo "Used Password:$passwd"
	else
		echo "Error! Could not create user $user."
	fi

        done < $csv_file;
fi

example.md

$ sudo ./create_users.py users.csv
loading users...
creating user 'asalvador-vega-nogales'
creating user 'jdoe'
creating user 'jsmith'
creating user 'jstrickland'
complete!

$ su jdoe
Password:
[jdoe@garnet alejandro-users]$

users.csv