A.[root@localhost]deletegroup1 B.[root@localhost]gdeletegroup1 C.[root@localhost]groupdelgroup1 D.[root@localhost]gdgroup1
A.etc/hosts B.etc/host.conf C.etc/hostname D.etc/bind
A.電子郵件 B.網(wǎng)頁瀏覽 C.VoIP D.網(wǎng)絡(luò)管理