A.chmod o+w file1B.chmod g+w file1C.chmod u+x file1D.chmod g+x file1
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