杀死一个进程的命令都有哪些（）。

A.virsh
B.libvirt
C.libvirtd
D.Virt

A.Systemctl restart chronyd
B.Systemctl start chronyd
C.Systemctl enable chronyd
D.Systemctl status chronyd

A.ssh-keygen
B.openssl
C.md5sum
D.Keytook