useradd.sh

#!/bin/bash

#-----------------<jihongrui@outlook.com>-----------------------

# 本脚本功能 删除系统不必要的用户和组，添加需要的用户和组，并设置强密码。

# 自动添加 admin sudo 无密码权限



PTAH="/sbin:/usr/sbin:/usr/local/sbin:/bin:/usr/bin:/usr/local/bin"

export PTAH



DATE=$(/bin/date +%Y-%m-%d)

#del user group

FIUSER="/etc/passwd"

FIGROUP="/etc/group"

FIPASS="/etc/shadow"

olduser=(

adm

lp

sync

shutdown

halt

news

uucp

operator

games

gopher

ftp

dip

pppusers

)



for x in ${olduser[@]}

do

        grep ${x} ${FIUSER} && userdel ${x} &>/dev/null

        grep ${x} ${FIGROUP} && groupdel ${x} &>/dev/null

done

#useradd www code szqsadmin backup

newuser=(

admin

www

code

backup

)

PASSLOG="${DATE}_passlog.txt"

[ -f ${PASSLOG} ] && echo >${PASSLOG}

for u in ${newuser[@]}

do

        PASS=`date +%s%N|md5sum|openssl rand -base64 32`

        useradd ${u} && \

        echo "$PASS" | passwd --stdin ${u}

        echo -e "\t Newuser:${u} \t Newpass:${PASS}" >>${PASSLOG}

        if [[ $u = "admin" ]]

                then

sed -i '98a admin ALL\=\(ALL\)  NOPASSWD\: ALL' /etc/sudoers

        fi

done

chmod 600 ${PASSLOG}