shell脚本实战——批次量创建/删除账号

前言：该脚本即可批量创建用户，又可批量删除用户，具体针对哪个用户进行操作，是在一个文本文件中进行定义的。并且使用此脚本创建的用户，首次登陆必须修改密码。

[root@localhost ~]# vim create_user.sh usergroup=""       #if your account need secondary group,add herepwmech="openssl"   #"openssl" or "account" is needed.homeperm="no" # if "yes" then I will modify home dir permission to 711usepw="123456"               #this is all user init password# 1.check the accountadd.txt fileaction="${1}"        #"create" is useradd and "delete" is userdelif [ ! -f accountadd.txt ];        then          echo "There is no accountadd.txt file,stop here"        exit 1fi[ "${usergroup}" != "" ] && groupadd -r ${usergroup}rm -f outputpw.txtusernames=$(cat accountadd.txt)for username in ${usernames}do        case ${action} in          "create")             [ "${usergroup}" != "" ] && usegrp=" -G ${usergroup} " || usegrp=""             useradd ${usegrp} ${username}             echo ${usepw} | passwd --stdin ${username}   #set password             chage -d 0 ${username}             [ "${homeperm}" == "yes" ] && chmod 711 /home/${username}        echo "username=${username},password=${usepw}" >> outputpw.txt             ;;"delete")               echo "deleting ${username}"               userdel -r ${username}               ;;          *)              echo "Usage:$0[create | delete]"               ;;        esacdone[root@localhost ~]# cat accountadd.txt            #将需要创建的用户名写入该文件lv1lv2lv3lv4#进行测试[root@localhost ~]# sh create_user.sh create              #执行create选项，进行创建更改用户 lv1 的密码 。passwd：所有的身份验证令牌已经成功更新。更改用户 lv2 的密码 。passwd：所有的身份验证令牌已经成功更新。更改用户 lv3 的密码 。passwd：所有的身份验证令牌已经成功更新。更改用户 lv4 的密码 。passwd：所有的身份验证令牌已经成功更新。[root@localhost ~]# tail -n 4 /etc/passwd                         #查看是否创建成功lv1:x:1004:1005::/home/lv1:/bin/bashlv2:x:1005:1006::/home/lv2:/bin/bashlv3:x:1006:1007::/home/lv3:/bin/bashlv4:x:1007:1008::/home/lv4:/bin/bash[root@localhost ~]# sh create_user.sh delete                  #执行delete选项，进行删除deleting lv1deleting lv2deleting lv3deleting lv4

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