创建目录
curl -u -u admin:123456 --ftp-ssl -k ftp://10.121.215.220 -Q "MKD this_is_a_test"
curl -u admin:123456 ftp://10.121.215.218 -Q "MKD FTP"
curl --ftp-ssl -u admin:123456 -k ftp://10.121.215.220 -Q "MKD this_is_a_test"
检查目录是否存在
curl -u admin:123456 --ftp-ssl -k ftp://10.121.215.220/this_is_a_test
