License: GNU General Public License v3.0
vsftpd.sh:
1、设计vsftpd中配置不同的虚拟用户tom和jerry具有不同的访问权限，如tom用户具有上传文件、删除文件、创建目录等权限，而jerry用户仅具有查看下载权限；
2、虚拟用户配置文件目录可为/etc/vsftpd/vusers_config，请写出配置步骤和具体内容？
ca.sh
1、为http, nginx, haproxy提供证书
httpd-2.2.tar.xz
1、centos7系统下实现httpd-2.2的安装，并分别实现prefork、worker、event等几种工作方式
pick_a_head.sh
1、写一个脚本，能从所有同学中随机挑选一个同学回答问题；进一步地：可接受一个参数，做为要挑选的同学的个数；
nginx.sh
1、编译安装nginx，为其提供systemd服务脚本;
zabbix_mariadb_gui.tar.xz
1、安装DB --> 安装server --> 安装GUI --> 安装Agent
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