Shell script practice-creating / deleting accounts in batches

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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