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多项选择题
A.ll /etc/passwd
B.ls /etc/passwd
C.ls –l /etc/passwd
D.cat /etc/passwd
单项选择题
A.systemctl restart network.service
B.systemctl network restart
C.systemctl status network
D.systemctl reload network
单项选择题
A.ipaddr
B.netmask
C.IPADDR
D.GATEWAY