A.useradd zhangsan to group1B.groupadd zhangsan group1C.groupadd group1zhangsanD.gpasswd -a zhangsan group1
A.systemctl start vsftpdB.systemctl is-enable vsftpdC.systemctl reload vsftpdD.systemctl enable vsftpd
A.systemctl stop vsftpdB.systemctl restart vsftpdC.systemctl state vsftpdD.systemctl status vsftpd