通过修改配置文件方式创建用户

1. /etc/passwd文件下添加用户

   [root@localhost ~]# vim /etc/passwd
   user3:x:3000:3000::/home/user3:/bin/bash
   

2. 通过openssl生成密码

   [root@localhost ~]# openssl passwd -6 redhat
   $6$TSpW4FSt2aQ1Ran7$YhiujuukIyC3SNw5Jy3oYRuE8ZfRS4yLvzNnVyiep719TNJ0JeWARmFvGvOi7a1b84J4PELEbwStJb13FZdEU/
   

3. /etc/shadow下添加密码

   [root@localhost ~]# vim /etc/shadow	      
   user3:$6$TSpW4FSt2aQ1Ran7$YhiujuukIyC3SNw5Jy3oYRuE8ZfRS4yLvzNnVyiep719TNJ0JeWARmFvGvOi7a1b84J4PELEbwStJb13FZdEU/:18567:0:
   99999:7:::
   

4. /etc/group添加用户组

   [root@localhost ~]# vim /etc/group
   user3:x:3000:
   

5. 创建用户家目录

   [root@localhost ~]# mkdir -p /home/user3
   [root@localhost ~]# chown user3:user3 /home/user3
   

6. 创建用户邮箱

   [root@localhost ~]# cd /var/mail
   [root@localhost ~]# touch user3
   [root@localhost ~]# chmod 660 user3
   [root@localhost ~]# chown user3:mail user3